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Pseudo-Static Test Research on Behavior of UHPC-Filled Rectangular Steel Tubular Columns KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-12 Yanxiang Yan, Heng Cai, Tao Cheng
This paper examines the cyclic behaviour of 13 ultra-high performance concrete filled steel tube columns (UHPCFSTs) by using pseudo-static test. The parameters such as the axial compression ratio, the steel tube thickness, the aspect ratio (h/b) and the loading modes (loaded with 10 cycles, 3 cycles and monotonic loading) are taken into account, and the effects of the parameters are discussed. The
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Improved Mechanical Behaviour and Microstructure of Cemented Soil with Nanomaterials KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-12 Jianguo Lu, Huayan Yao, Isam Shahrour, Qingyao Fang, Weilong Song, Guang Liu
This paper presents an experimental study of nanomaterials’ influence on improving the mechanical behaviour and microstructure of cemented soils. The strength characteristics were obtained through uniaxial compressive strength test. The influences of nanomaterials on the pore size distribution and micromorphology of cemented soil were investigated by nuclear magnetic resonance, scanning electron microscope
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Analytical Solution and Factors Influencing the Tunnel Plastic Zone under a Nonuniform Stress Field KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-12 Ziwen Luo, Ru Zhang, Li Ren, Liangjuan Zheng, Zhilong Zhang, Zetian Zhang, Jing Xie, Lanbin Zhang
The size of plastic zone is an important parameter for determining the surrounding rock stability. In practical engineering, the initial rock environment is dominated by a nonuniform stress field, especially in areas with high tectonic stresses. To explore the plastic zone distribution of the tunnel surrounding rock under a nonuniform stress field, a new analytical solution for the plastic zone radius
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Model Test Investigation of Pipe-Soil Interaction under Frost Heave Conditions of Roadbed KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-12 Qiang Ma, Gaofei Zeng, Henglin Xiao, Xinlong Zhou
Exploring the interaction of pipe-soil under frost heave effect is the key to solving the problem of frequent damage to buried pipes. In this study, the effects of ambient temperature (AT), buried depth of pipe (BDP) and initial water content (IWC) on the interaction of pipe-soil under the condition of roadbed frost heave are studiedby experimental test. The results show that the buried pipe seriously
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Spatio-temporal Variability of Trends in Extreme Climatic Indices across India KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-12 Adarsh Sankaran, Soorya Gayathri Madhusudanan, Christopher Ndehedehe, Arathy Nair Geetha Raveendran Nair
This study analysed the spatio-temporal variability in the trend of 9 extreme rainfall indices (ERIs) and 4 extreme temperature indices (ETIs) over India, estimated from 1° × 1° resolution daily datasets of 1951–2015 period. The trend analysis showed that 20% of grids exhibited a significant increase in Simple Daily Intensity Index (SDII) series, while Consecutive Wet Day (CWD) index of 32% of the
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A Prospective Technique for Damage Detection in Truss Structures Using the Fusion of DNN with AVOA KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Quyet Huu Nguyen, Thang Xuan Le, Dang Le Minh Nguyen, Thanh Tien Bui, Nhung Cam Nguyen, Hoa Ngoc Tran
In recent decades, the integration of optimization methods and Machine Learning (ML) models has garnered significant attention within the research community. In the pursuit of establishing a symbiotic relationship between ML and optimization algorithms, this study focuses on the fusion of the African Vulture Optimization Algorithm (AVOA) - an optimization algorithm inspired by the foraging behavior
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Investigation of Metro Train-Induced Environmental Vibration Using a Coupled Sliced Finite Element-Infinite Element Model KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Longxiang Ma, Yunxiang Yu, Hongyi Li, Hao Yang
A coupled sliced finite element-infinite element model is developed to analyse the train-induced environmental vibration from metro tunnel by treating the tunnel-ground system as a longitudinal periodic structure. Based on the auxiliary periodic train-track coupling model, this model enables one to select any periodic spatial range of the tunnel-ground system to analyse the response of the longitudinally
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Probability and Impact Perspectives on Cost and Schedule Risks in International Construction Projects: An Empirical Investigation KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Jin Woo Won, Wooyong Jung, Seungwon Baek, Seung Heon Han
Numerous studies about risk assessment have been conducted in academia, but there is still a gap between practice. To close this gap between practice and academia, researchers should understand and provide improvements based on the actual practice of risk analysis. The purpose of this study is to provide practical knowledge on risk assessment by investigating empirical data on risk probability and
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Required Active Earth Pressure for 3D ERSs Following a Modified Mohr-Coulomb Strength Criterion KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Jingshu Xu, Xinrui Wang, Liyun Li, Xiuli Du
Exploiting the linear Mohr-Coulomb strength criterion, the stability computation for earth retaining structures (ERSs) by estimating the active earth pressure has been mainly conducted by setting the plane strain 2D. In this research, the modified MC strength criterion with reduced tensile strength is put into use for the stability analysis of ERSs employing a 3D multi-cone collapse analysis mechanism
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Impact Analysis Model of Landslide-generated Waves on Local Damage to Post-earthquake Arch Dams KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Yuqian Li, Jianyun Chen, Qiang Xu, Jing Li
The purpose of this study is to propose an impact analysis model to explore the effect of the post-earthquake landslide surge on local damage to ultra-high arch dams. Based on the existing pressure model of landslide-generated waves impacting the dam, nonlinear dynamic analysis is conducted on a high arch dam subjected to the landslide surge of different surge heights after the earthquake, through
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An Experimental Study of the Effects of Filling Degree on Shear Behavior and Acoustic Emission Characteristics of Kaolinite-Filled Granite Joints KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Yangbing Cao, Yaoyao Zhang, Zhi Liu, Min Bao
The existence of kaolinite inside the granite joints reduces the direct contact between the jointed rock walls, which is an unfavorable factor for the stability of underground engineering. However, there are limited studies addressing kaolinite-filled granite joints of different filling degrees (the ratio of filling thickness t to the maximum fluctuation height a of the joint surface (t/a)) even to
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UAV Photogrammetry-based Sea Level Establishment for a Storm Surge Early Warning System in Wolpo-beach, South Korea KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Kiyoung Seong, Taesam Lee, Vijay P. Singh
Recent environmental change exacerbates living conditions especially in coastal areas due to increases of frequency and intensity of typhoons. A storm surge early warning system (SEWS) can be a useful non-structural measure to protect the public living in coastal areas. The establishment of sea levels for the SEWS has a critical role. Thorough ground surveying is desired to establish sea levels by
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Influence of Borehole Shear Test Wedge Spacing on Shear Strength Parameters of Intermediate Geomaterials KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Young-Woo Song, Choong-Ki Chung, Seung-Hwan Lee
The borehole shear test (BST) is an in-situ test method to estimate shear strength and its parameters of geomaterials (i.e., cohesion and friction angle). The shear plate with wedges is an important component of the BST for shearing the ground. It is well known that the wedge type of the shear plate affects the shear strength evaluation; therefore, various wedge types of shear plates have been developed
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Predicting the Ultimate Load Capacity of Extradosed Cable-Stayed Bridges: A Novel Method KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Tao Song, Baoqun Wang, Yi Peng, Liheng Cui
The ultimate load capacity of extradosed cable-stayed bridges (ECSB) is the basis for structural design and bridge management. The ECSB is a new combination system of both cable- stayed bridges (CSB) and multi-span continuous bridges. It is difficult to predict the ultimate load capacity of ECSB due to its particular form. In this paper, a novel method is presented to predict the ultimate load capacity
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Aerodynamic Effect Associated with Tunnel Length KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Jianming Du, Qian Fang, Xuan Zhang, Hualao Wang
Aerodynamic pressure is one of the important elements impacting the degradation of service performance of high-speed railways. Aerodynamic characteristics produced by high-speed train associated with tunnel length are studied using numerical method. The input parameters, which are adopted in simulation, are verified with the on-site monitoring obtained by other researchers. The characteristics of aerodynamic
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Effect of Freeze-thaw Damage and Pore Structure on Capillary Water Absorption of Gangue-based Concrete KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Xiao Guan, Haoyue Ji, Jisheng Qiu, Qianhui Xiao
Driven by capillary adsorption, moisture and aggressive media can easily intrude into unsaturated concrete and shorten the service life of concrete structures. In the present study, gangue-based concrete (GBC) was produced by replacing cement (substitution rate 0%, 10%, 20% and 30%) with mechanical-microwave activated coal gangue powder (ACGP) to explore the effect of freeze-thaw damage on the water
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Detection of Climate Non Stationarity of Indian Rainfall Using Innovative Trend Family of Techniques KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Arathy Nair Geetha Raveendran Nair, Adarsh Sankaran, Anishka Priya Suresh, Celina Thomas, Aiswarya Kavitha Ajith, Amalenthu Anitha Vasanthan
The hydrological cycle is significantly impacted by climatic changes, and understanding such changes using statistical or graphical methods is essential for proper management of water resources. This study performs the applications of two most recently proposed variants of popular Sen’s Innovative Trend Analysis (ITA) methods namely Innovative Polygonal Trend Analysis (IPTA) and Innovative Trend Pivot
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Study on the Characteristics of Slurry Support Efficiency on Excavation Face Induced by Shield Cutterhead Cutting in Sand Stratum KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-04 Jiahua Mao, Dajun Yuan, Jian Chen, Pengbo Yang, Shengnan Liu
During the slurry shield machine tunnelling in sand stratum with strong permeability, it can be challenging to achieve the filter cake formation on the excavation face in time. The continuous damage of shield cutting tools on the filter cake is a significant contributor to the challenge of maintaining the support pressure of slurry. To investigate the influence of shield tunneling parameters on the
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Reply to Discussion of “Experimental Study on Unconfined Compressive Strength of Rubberized Cemented Soil” by Abdellah Cherif Taiba, Youcef Mahmoudi, Mostefa Belkhatir KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-01
Abstract The authors appreciated the discussants for their suggestions on their recent paper regarding four key topics: the evaluation of the ductility index of rubberized cemented soil, comparative analysis between predicted models and actual results, providing guidance and suggestions for the application of rubberized cemented soil in engineering practice, and evaluating the environmental impact
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Discussion of “Experimental Study on Unconfined Compressive Strength of Rubberized Cemented Soil” by Jie He, Duanwei Guo, Dexin Song, Fangcheng Liu, Lei Zhang, and Qifeng Wen KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-01 Jie He, Duanwei Guo, Dexin Song, Fangcheng Liu, Lei Zhang, Qifeng Wen, Abdellah Cherif Taiba, Youcef Mahmoudi, Mostefa Belkhatir
This paper aims to provide further elaboration on the main subject discussed in the recently published article titled “Experimental Study on Unconfined Compressive Strength of Rubberized Cemented Soil” in the KSCE Journal of Civil Engineering, authored by He et al. (2023). The intention here is to enhance the overall cohesion of the paper and render it more conducive to meaningful discussion.
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A Real-time Positioning Model for UAV’s Patrolling Images Based on Airborne LiDAR Point Cloud Fusion KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-01
Abstract The precise positioning issue of oblique aerial image has been widely studied in recent years. However, there are still some deficiencies in applying the existing methods to highly time-sensitive engineering. For the real-time positioning issues of oblique images involved in Unmanned Aerial Vehicle’s (UAV’s) patrolling applications, existing photogrammetry method cannot meet the real-time
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Research on the Carbonation Resistance and Carbonation Depth Prediction Model of Fly Ash- and Slag-Based Geopolymer Concrete KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-01
Abstract To study the effect of different slag content and different curing methods on the carbonation resistance of fly ash- and slag-based geopolymer concrete (FA&SL-GPC), a series of experiments were carried out with slag content (accounting for 10%, 30% and 50% of cementitious materials) and curing methods (standard curing and high temperature curing) as variables. The results show that increasing
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Progressive Collapse Behavior of Large-span Truss String Structures Subjected to Cable Failure KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-04-01
Abstract Cables play an important role in truss string structures, and their sudden failure can lead to massive damage and even collapse of the structures. This paper studies the dynamic response of a 72 m span truss string structure, the progressive collapse numerical simulation of the structure is carried out under different load conditions, the displacement and force responses of the structure after
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The Influence of CSR to Financial Performance in International Engineering Contracting Enterprises: Evidence from China KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-03-09 Xiaoxu Dang, Shihui Wang, Xiaopeng Deng, Na Zhang, Hongtao Mao, Xiaowei Wang
The purpose of this study is to examine the effect of corporate social responsibility (CSR) on the financial performance of international engineering contracting enterprises (IECEs). The study also explores the mechanisms of CSR influence on financial performance from three perspectives: customer, employee, and corporate, namely the mediating roles of customer satisfaction, employee loyalty, and corporate
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UAV Imagery-based Automatic Classification of Ground Surface Types for Earthworks KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-03-09 Daeyoun Won, Seokho Chi, Jin Ouk Choi
The construction industry is introducing autonomous heavy equipment to overcome labor shortages and improve productivity. For autonomous heavy equipment to work on earthmoving at sites, the equipment needs to recognize and understand ground surface types. However, the ground surface types are manually inspected in practice, and related studies are lacking. To address this issue, the authors developed
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Research on Comparative of Multi-Surrogate Models to Optimize Complex Truss Structures KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-03-09 Chongjian Yang, Junle Yang, Yixiao Qin
Surrogate models have been proven to be reliable and effective methods for the application of engineering problems. This article presents a comparative study of three common surrogate models Polynomial Response Surface (PRS), Radial Basis Function (RBF) neural network, and Kriging model in terms of optimization. For the optimization of plane 10-bar truss structure and 25 bar space truss, the effectiveness
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Experimental Study on Performance of Low Alkali Eco-friendly Dredged Sludge Solidifying Agent KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-03-09
Abstract This study investigates the development of a low-alkali eco-friendly solidifying agent (SA) for dredged sludge using cement (C), steel slag powder (SSP), granulated blast-furnace slag (GGBFS), and phosphorus gypsum (PG). First, an orthogonal test design is employed to determine optimal proportions. The impact of material components on the unrestricted compressive strength (UCS), water absorption
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Enhancing Salp Swarm Optimization with Orthogonal Diagonalization Transformation for Damage Detection in Truss Bridge KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-03-09 Hung Viet Tran, Thanh Chi Nguyen, Thang Xuan Le, Nhung Thi-Cam Nguyen, Thuc Van Ngo, Hoa Ngoc Tran
This paper proposes a novel approach for structural damage identification using the Salp Swarm Algorithm (SSA) combined with Orthogonal Diagonalization (OD). SSA is an optimization algorithm developed in recent years and has been considered for addressing complex and computationally expensive engineering problems. However, due to the utilization of only the leader salp to search for optimal solutions
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Special Case on Landslide in Balikpapan, Indonesia Viewed from Crack Soil Approach KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-28
Abstract This research aims to determine the impact of cracked soil and its corresponding variations on slope stability within two distinct areas exhibiting diverse topographic conditions, both of which have previously encountered failure in Karang Joang, Balikpapan. A coupled program, such as SEEP/W and SLOPE/W was applied to access the influence of rainfall on slope stability, while existing soil
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Optimal Design of Subsurface Conveyance System Based Bio-Ecological Drainage System Simulation KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-28 Sai Hin Lai, Ren Jie Chin, Eugene Zhen Xiang Soo, Lloyd Ling, Hamed Benisi Ghadim
As urbanization grows in size, the problems of flash floods and water pollution are expected to worsen, so viable and cost-effective solutions are essential to reduce the impacts. The Bio-Ecological Drainage System (BIOECODS) was developed to demonstrate the use of ‘control at source’ approaches to urban stormwater management. This research attempts to analyse the optimal design of a subsurface conveyance
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Validating Railway Infrastructure Deformation Monitoring: A Comparative Analysis of Field Data and TerraSAR-X PS-InSAR Results KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-28 Byung-Kyu Kim, Winter Kim, Changgil Lee, Mintaek Yoo, Ilhwa Lee
Railway infrastructure maintenance faces a challenge posed by the laborious task of monitoring widespread deformation, which is critical for ensuring safety. This study utilized the Persistent Scatterer Interferometric Synthetic Aperture Radar (PS-InSAR) technique with high-resolution TerraSAR-X satellite images to measure and analyze deformation at the operating track. Tailored through parameter optimization
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Study on the Moisture and Thermal Characteristics of Vegetated Expansive Soil Slopes KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-28 Quan Shen, Yidan Zhang, Canrong Xie, Chengli Zhang, Chaohui Wang
The moisture and thermal characteristics of expansive soil slopes have a significant impact on the strength and overall stability of the soil. In this study, the medium-strength expansive soil vegetated slope in Baise, Guangxi, was taken as the research object. Through the combination of numerical simulation and measured meteorological data, the impact of moisture and heat characteristics on slope
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Study on Hydration and Hardening Performance of Coal Gangue-Steel Slag-Cement Composite Cementitious Material KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-24 Xiaozhi Zhao, Liang Wang, Chenglong Wang, Jian Xu, Wei Hu, Qi Li, Hao Wang
In this paper, coal gangue powder (CGP) was used to replace 30% of the cement weight. The dosage of steel slag powder (SSP) was 5%, 10%, 15%, 20%, and 25% of the coal gangue weight. The CGP-SSP-cement mortars and pastes were prepared. The compressive and flexural strengths, hydration heat, X-ray diffraction (XRD), thermogravimetric analysis (TGA-DTG), pore structure (MIP), electric flux, and capillary
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Uniaxial Compression Testing of Sandstone under Microscope: Damage Characteristics and Failure Mechanisms KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-24 Huarui Hu, Binwei Xia, Canan Chen, Jiajun Peng, Shirong Cao, Yangyang Li
A compression module system placed under a microscope was utilized to conduct uniaxial compression testing of sandstone samples. The test system can acquire the image of crack propagation on the specimen surface in real time. The focus of this study was to analyze how the motion of sandstone composition particles affect the failure mechanism of the samples under minimal loading rates. The results indicate
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Effect of Skew Angle on Seismic Response of Irregular Concrete Bridges with Horizontal Curve KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-24
Abstract This article is a parametric study of 315 reinforced concrete bridges including 45 straight and 270 curved bridges for different geometrical conditions in different layouts, which were stimulated by earthquake near-field records. Past experiences show that irregular bridges with skew angles exhibit more critical behavior when exposed to near-field records. For this reason, in current research
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Failure Mechanism of Anchored Roadway Surrounding Rocks under Near-Field Dynamic Disturbance KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-24
Abstract Aiming at roadway rockbursts induced by near-field dynamic disturbances, this study explored the mechanical response and failure mechanism of anchored roadway surrounding rocks under this condition through the similarity simulation experiment and theoretical modeling analysis. Results show that the greater the disturbance energy is, the stronger mechanical response of surrounding rocks while
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Multi-Camera People Counting Using a Queue-Buffer Algorithm for Effective Search and Rescue in Building Disasters KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-24 Chanhyuk Park, Hwikyung Chun, Seokho Chi
Over the past decade, the frequency of building disasters has been concerning. However, search and rescue operations often encounter challenges due to limited information, resulting in delays or inadequate assistance for occupants trapped inside the building. The importance of obtaining real-time occupancy information has been recognized and studied in the field of people counting. While various sensor
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Three-Dimensional Face Stability Assessments of Seismic Tunnels in Weak Rock Masses KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-24 Jinfeng Zou, Shiwei Li, Guanghui Chen
The face stability assessments of seismic tunnels have been complicated and crucial problems. To solve this issue, an advanced three-dimensional (3D) rotational failure mechanism with considering seismic effects is developed to assess the seismic face stability of shield tunnels in weak rock masses. The Hoek-Brown (HB) failure criteria is employed to characterize rock masses with weak strength. The
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Multivariate Experimental Study on EICP Combined with Polypropylene Fiber Solidified Desert Sand KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-24 Meng Cui, Huihui Xiong, Suying Lv, Junjie Zheng, Mingjuan Cui, Chen Zeng
In this study, Enzyme-Induced Carbonate Precipitation (EICP) combined with polypropylene fiber technology was used to solidify desert sand, the orthogonal theory was used to design the different levels of the five test variables of cementation solution concentration, urease concentration, enzyme gel ratio, fiber length and fiber content, and the curing effect of EICP combined with polypropylene fiber
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Discrete Element Simulation of Macro and Micro Mechanical Properties of Round Gravel Material under Triaxial Stress KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-23 Shaokun Ma, Haijun Huang, Fapai Tian, Jian Gong, Jiabing Zhang, Zhibo Duan
In this study, the effects of relative density and confining pressure on the shear characteristics of round gravel are investigated using a large-scale triaxial apparatus and the discrete element method. A simple and efficient numerical method for simulating flexible membranes is introduced. The results show that the stress-strain curves develop from hardened to softened type with increasing relative
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Impacts of Management Approaches on Conflict Resolution Satisfaction: Conflict Strength Matters KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-23 Lihan Zhang, Jianmin Lou, Yongcheng Fu, Tianhuan Ding
Conflict is inevitable in construction projects, and satisfactory conflict resolution is vital for maintaining amicable relationships and accomplishing project goals. This study aims to explain satisfaction with conflict resolution outcomes by referring to cooperative and competitive conflict management approaches and exploring how these relationships change in light of different degrees of conflict
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Pressure Power Spectra of a ‘Z’ Shaped in Plan Tall Building under Transient Wind Environment KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-23
Abstract This study foresees the behavior of a ‘Z’ shaped in plan tall building under transient wind storms using unsteady Reynolds-averaged Navier Stokes (URANS) Computational Fluid Dynamics (CFD) technique. Numerical simulations are carried out using ANSYS–CFX, adopting length and velocity scales of 1:300 and 1:5, respectively. Surface streamlines are presented in the article to depict the wind flow
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Experimental Study on Compressibility and Microstructure of Loess Solidified by Permeable Polymer KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-23 Chengchao Guo, Xiaodong Yang, Weifan Zhao
This study aims to investigate the compressive and microstructural properties of loess before and after treatment with a new permeable polymer. To enhance the compressive properties of loess, specimens were infused with the new polymer, and one-dimensional consolidation tests were performed to assess the compressibility of solidified loess (SL) and unsolidified loess (UL) at different water contents
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Experimental Study on the Bearing Characteristics of Rigid-Flexible Long-Short Pile Composite Foundations in Thick Collapsible Loess Areas KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-23 Fei Gao, Xuansheng Cheng, Wenfang Wang, Qingfeng Lv, Xiangjun Cheng
The bearing and deformation characteristics of embankments with rigid-flexible long-short pile composite foundations (RLPCFs) in thick collapsible loess strata are not yet accurately understood. In this study, a large-scale field experiment was conducted, and screw (long) and compaction (short) piles were employed to reinforce a section of the foundation of the Lanzhou-Zhangye high-speed railway in
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Enhancing Project Performance: Particle Swarm Optimization for Optimal Budget Allocation and Maintenance Scheduling KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-19 Abolfazl Arzanlou, J. Majrouhi Sardroud
This study aims to help project-oriented organizations manage their portfolios and arrive at an optimum budget allocation. In this study, the budget allocation process in a portfolio of projects is mathematically formulated. The interactions between the projects as well as the operational and budget constraints are considered. Then, the optimal budget allocation is determined using the particle swarm
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Development of a Mutation Operator in a Real-Coded Genetic Algorithm for Bridge Model Optimization KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-17 Jaecheon Kim, Manseok Han, Soobong Shin
A mutation operator in a real-coded genetic algorithm is developed and applied for efficient bridge-model optimization. A mutation operator that changes uniformly or dynamically with a crossover operator is proposed to address optimization problems. The performance of the combined genetic operators was verified using a variety of available test problems based on the convergence and search speed of
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Application of Impact Force Response Signal to Non-destructive Evaluation of Concrete Compressive Strength in Field Structures KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-17 Moorak Son, Woori Jeong
This study aimed to evaluate the feasibility and usefulness of using the signal created by the impact force after the first impact of an object and subsequent impact of rebounds to evaluate the concrete’s compressive strength non-destructively. Three distinct materials (steel, concrete, and wood) were tested to compare the compressive strengths and signal response using a developed device. The test
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Quantifying Uncertainty in Hydrological Drought Index Using Calibrated SWAT Model KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-17 Jin Hyuck Kim, Eun-Sung Chung, Jae Yeol Song, Shamsuddin Shahid
The hydrological model requires precise parameter calibration to reflect the basin characteristics properly. The optimum parameter values depend highly on the runoff characteristics; thus, the simulated runoff data affects the uncertainty in hydrological drought assessment using hydrological models. This study quantified the hydrological drought uncertainty based on all available calibrated parameters
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Research on the Sleeve Grouting Fullness Testing of Prefabricated Structures Based on Piezoelectric Method KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Yongxiao Du, Xiaoli Sun, Jun Yang, Zhiqiang Wu, Decun Bian
The traditional methods for testing the sleeve grouting fullness of prefabricated structures generally face the technical challenges such as high detection cost and inability to detect in real-time. In order to solve these technical challenges, the detection method and instrument based on the piezoelectric testing principle were developed. Through the electrical properties tests of grouting materials
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Seismic Bearing Capacity of Strip Footings with Modified Pseudo-dynamic Method KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15
Abstract Current research has shown a nonlinear trend in the failure of soil, and the single tangent method is commonly adopted when coping with nonlinear problems of soil failure. However, the method equates a nonlinear criterion to an optimizable linear criterion, which may differ from the actual situation, resulting in conservative results. In this paper, two types of piece-wise log-spiral failure
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A Novel Calculation Model for the Permeability Coefficient of Soils Conditioned with Foam and Bentonite Slurry KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Fanlin Ling, Shuying Wang, Xiangcou Zheng, Jiazheng Zhong, Yujia Chen
Both foam and bentonite slurry are commonly employed in soil conditioning to prevent water spewing during earth pressure balance (EPB) shield tunnelling. A novel calculation model to estimate the permeability coefficient of soils conditioned with foam and bentonite slurry is developed. In this model, bentonite particles are assumed to adhere to the foam film in a monolayer of bridging particles, and
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Optimization of Microphone Placement for Audio-based Modeling of Construction Jobsites KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Maria Vitoria Bini Farias, Yinhu Wang, Abbas Rashidi, Nikola Marković
Heavy equipment is a crucial resource in the construction industry. Recent studies have shown that analyzing the sound patterns generated by construction machinery can be an effective way to monitor their performance and detect potential operational issues. However, construction jobsites are complex environments that require consideration of multiple factors when creating an audio-based model. To perform
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Dismantling Quantity Estimation for Nuclear Power Plant: Scan-to-BIM versus Conventional Method KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Jaeseop Shin, Jeongwoog Song
This paper presents a case study of using Scan-to-BIM technology for evaluating the quantity and cost of a nuclear power plant during the decommissioning process. The study proposes a process for applying Scan-to-BIM in the dismantling stage and develops a BIM-based VPL (Visual Programming Language) to acquire accurate as-is databases that are crucial for nuclear power plants handling radioactive materials
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DMA Characteristic Identification for Efficient Water Loss Management: Case Study of MWA Pipe Network, Thailand KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Manatsawee Nawik, Suwatana Chittaladakorn, Sitang Pilailar
This study is designed to categorize essential characteristics of District Metered Area (DMA), focusing on aspects related to pipe management such as real water loss, pipe density, and customer density. Our objective is to delineate the influence of each characteristic, with the ultimate goal of developing a practical index that aids planners in making informed decisions about water loss management
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Seismic Performance Management of Aged Road Facilities in Korea: Part 1 — Fragility Curves KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Soobong Shin, Ickhyun Kim, Ki-Il Song, Duhee Park, Byungmin Kim, Hyojoon An, Kee-Jeung Hong
This study aimed to develop a decision-making support system for managing the seismic performance of aged road facilities in a road network, based on their evaluated seismic performance. This study was divided into two parts. In Part 1, seismic fragility functions are developed for bridges, tunnels, retaining walls, and slopes, while considering aging. In Part 2, the degradation of the seismic performance
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Deformation Characteristics of Soft Soil Induced by Deep Excavation and Its Impact on Adjacent Tunnels: A Case Study in Shanghai KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Tao Peng, Dongxing Ren, Chao Kang, Huanhuan Liu, Peng Xue, Hai Huang
This research aims to comprehensively study the deformation characteristics of an excavation pit of 7,600 m2 (117 m long, 65 m wide and 20.8 m deep) in soft clay in Shanghai, China. The deformation characteristics of the mixing pile in both the vertical and lateral directions, ground surface movement, and surface displacement in the adjacent tunnels were comprehensively investigated. The results indicated
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Overtopping Failure Process and Core Wall Fracture Mechanism of a New Concrete Core Wall Dam KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 You-ming Zuo, Jia-wen Zhou, Hai-bo Li, Jie-yuan Zhang, Chang Tan, Xiao-dong Wang, Yu-shan Wang, Yue Zhou
Concrete core wall dams have emerged as a cost-effective alternative to the reconstruction of old dams. However, the flooding mechanism and flood line of these dams differ significantly from traditional earth and rockfill dams due to the concrete core wall functioning as reinforcement. This study presents model tests that simulate the overtopping failure of earth and rockfill dams with concrete core
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Seismic Performance Analysis of Semi-rigid Steel Frame Based on Panel Zone Mechanical Characteristics of the Joint Experiment Study KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-15 Shengcan Lu, Minrong Wang, Xiangxi Han, Tulong Yin
The panel zone, as an important part of the semi-rigid connection (SRC), can effectively affect the force transfer mechanism of the connection. This study aims to evaluate the panel zone mechanical characteristics through test on end-plate connection (EPC) and T-stub connection (TSC) under cyclic loading. Based on failure criteria, the mechanical properties of the panel zone are discussed, including
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An Experimental on Filtration and Clogging of Geotextile Filters around Drain Pipes in Fine Tailings KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-08
Abstract Needle-punched nonwoven geotextiles have been used as filters for decades in mine drainage systems. But the physical clogging of geotextiles by fine particles has continued to receive increasing attention. In this study, the permeation characteristics of a drain pipe wrapped with geotextiles were investigated based on a new radial flow experiment apparatus, and particle size distribution (PSD)
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The Impact of the Parking Spot’ Surroundings on Charging Decision: A Data-Driven Approach KSCE J. Civ. Eng. (IF 2.2) Pub Date : 2024-02-08 Xizhen Zhou, Yanjie Ji, Mengqi Lv
The charging behavior of drivers serves as a valuable reference for planning and managing charging facilities. This study examines the influence of surrounding environments on charging decisions using real trajectory data from electric vehicles. It considers the built environment, vehicle conditions, and the nearest charging station attributes. The mixed binary logit model was applied to capture the