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Wave-induced vibration control of Floating production storage and offloading systems by tuned mass damper inerter Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-20 Nilarghya Sarkar, Sanjukta Chakraborty, Aparna (Dey) Ghosh
Floating production storage and offloading systems (FPSOs) are gaining prominence in the offshore industry. FPSOs are generally designed to weathervane, necessitating surge vibration control for station keeping. Since the natural period of surge vibration is far higher than the dominant period of the input wave load, instead of supplemental damping, a high inertial device, such as the tuned mass damper
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Nonlinear model of bridge bearings considering friction effect under horizontal seismic action Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-17 Dong-Hui Yang, Yong-Chang Zhang, Xu Zheng, Ting-Hua Yi, Hong-Nan Li
Bearings are regarded as a crucial element that impacts the overall performance of the seismic analysis of bridges. The assessment of seismic performance in bridges heavily depends on the nonlinear features of bridge bearings. Therefore, it is essential to simulate the nonlinear mechanical behavior of bridge bearings to attain the required accuracy of seismic analysis. This paper examines the friction
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Bridge temperature prediction method based on long short-term memory neural networks and shared meteorological data Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-17 Linren Zhou, Taojun Wang, Yumeng Chen
Temperature is an important load factor affecting the structural performances of bridges. The rapid acquisition of bridge temperature data is significant for bridge temperature effect analysis and assessment. On the bases of ground meteorological shared big data, a bridge temperature prediction method based on long short-term memory (LSTM) neural network is proposed. The proposed method is used to
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Dynamic model of high-speed maglev train-guideway bridge system with a nonlinear suspension controller Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-16 Xiumeng Bu, Lidong Wang, Yan Han, Hanyun Liu, Peng Hu, CS Cai
To improve the anti-interference ability of maglev trains, a dynamic model of the high-speed maglev train with a nonlinear suspension controller for the guideway system is proposed in this paper. Based on the nonlinear characteristics of the magnetic suspension system, a nonlinear decoupling controller is designed using the feedback linearization theory. Then, a high-speed maglev train model is refined
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Time-dependent reliability assessment and optimal design of corroded reinforced concrete beams Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-15 Junxiang Li, Xiwei Guo, Xinxin Zhang, Zijun Wu
It remains a significant challenge to quantitatively describe the corrosion of reinforced concrete (RC) structures under chloride penetration. Moreover, when considering uncertainties throughout the life cycle of corroded RC structures for assessing their safety, reliability, and optimal design, the complexity of the problem intensifies. To address these issues, this paper studies the time-dependent
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Experimental study and refined numerical simulation of ultimate pressure-bearing performance of rope-reinforced airship envelope structures Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-12 Shiping Li, Wujun Chen, Longlong Chen, Yinbo Song, Jianhui Hu, Haitao Zhao, Daxu Zhang
Stratospheric airships require a lightweight envelope to contain lighter-than-air buoyancy gas, making the lightweight design and pressure-bearing performance of the envelope structure a key research issue. The stress state at different cross-sectional positions of the airship envelope structure is different, resulting in a low utilization rate of the overall material performance of the envelope structure
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Typhoon- and temperature-induced responses of a cable-stayed bridge Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-10 Qiang Jing, Yushi Shan, Lu Zhang, Yu Yan, Zili Xia, Yong Xia
Long-span bridges are subjected to wind and temperature actions. Wind action is generally the governing load of long-span bridges in design, while temperature action is also significant. Accurate separation of typhoon- and temperature-induced responses is thus necessary for in-depth investigation of their effects and comprehensive evaluation of structural performance. This paper separates the temperature-
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Assessment of critical parameters affecting fretting fatigue life of bridge stay cables at saddle supports Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-09 Ali Chehrazi, Scott Walbridge
Saddle systems are a popular solution for supporting cables in cable-stayed bridges. Fretting fatigue failure of cables at saddle supports is a primary design consideration for these systems. Critical parameters that affect the fretting fatigue life of the cables are the contact forces and the slip displacements at the contact points between the cables and the saddle. Determining these critical parameters
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Flexural behavior of reinforced concrete beams strengthened with gradually prestressed near surface mounted carbon fiber-reinforced polymer strips under static and fatigue loading Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-04-08 Shuang Gong, Miao Su, Jianren Zhang, Hui Peng
The near surface mounted (NSM) carbon fiber-reinforced polymer (CFRP) strengthening technique, combined with gradually anchored prestressed technique, is utilized to delay the occurrence of concrete cover separation (CCS) and enhance the ductility of reinforced concrete beams. The load-carrying capacity of fully prestressed beams and gradually prestressed beams are investigated under both static and
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Substructural damage identification in a digital twin framework using heterogeneous response reconstruction Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-29 Guangcai Zhang, Zhenwei Zhou, Chunfeng Wan, Zhenghao Ding, Zhishen Wu, Liyu Xie, Songtao Xue
The external excitations, interface forces and responses at the interface degrees-of-freedom are normally required in many existing substructural condition assessment methods, while they are difficult or even impossible to be accurately measured. To address this issue, a digital twin framework for output-only substructural damage identification with data fusion of muti-type responses is proposed in
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Experimental and numerical study on structural behavior of folded dowel shear connection Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-29 Yang Huang, Shiming Chen, Ping Gu
A new type composite dowel shear connector was proposed by introducing folded angles in the steel dowels. Four push-out specimens and two composite beam specimens were designed and experimentally studied. The structural behavior and failure mechanism of the composite folded dowel shear connection were investigated. The concrete failure was observed in both push-out and flexural tests, and the folded
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Image-based automatic multiple-defect detection of urban utility tunnel using UUTNet Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-29 Weihao Sun, Shitong Hou, Gang Wu, Dongming Feng, Jianhua Fan
In-service urban utility tunnels (UUT) suffer from cracks, corrosion, and leakage defects, which rises the chance of major accidents. However, prevailing detection methods for UUT remain reliant on manual inspection and subjective judgment, or traditional image processing technologies, such methods may not be able to obtain accurate defect information. This study proposes a novel and effective network
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Interference effects on two rectangular tall buildings with coupling bridge in close proximity Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-29 Souvick Sadhukhan, Arghyadip Das, Satadru Bhattacharya, Sujit Kumar Dalui
The study is on the variation of pressure in different faces of rectangular plan-shaped tall buildings with interference conditions due to the presence of another building with the same shape and dimension connected through a multipurpose bridge. The analysis is done on computational fluid dynamics (namely ANSYS CFX) for 0° to 90° wind incidence angle (WIA). The buildings are spaced 60 m from each
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Stress-strain behaviour of carbon fibre reinforced polymer-confined concrete containing macro fibres recycled from waste glass fibre reinforced polymer Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-28 Qi-Qi Zou, Bing Fu, Jian-Fei Chen, Jin-Guang Teng
Glass fibre-reinforced polymer (GFRP) wastes may be mechanically processed into small strips called “macro fibres,” which were used as short reinforcement fibres to produce macro fibre reinforced concrete (MFRC). The addition of such macro fibres into concrete has proven to be effective in enhancing the flexural strength and toughness of concrete, but it also slightly reduces the compressive strength
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Experimental investigation on the effect of hoop spacing and crosstie configuration on the cyclic performance of reinforced concrete beams Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-28 Tai-Kuang Lee, Cheng-Cheng Chen
According to ACI 318-19(SI), in the plastic hinge zone of RC beams, the longitudinal reinforcement at each corner and every other longitudinal reinforcement must be enclosed by the corner of the closed hoop or the hooks of crossties. However, in RC construction practice, the longitudinal reinforcement of RC beams is densely arranged, making construction difficult. In this study, four large RC beam
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Interface debonding defect detection for CFST columns based on EMI measurements: Experiment, numerical simulation and blind inspection in practice Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-28 Qian Liu, Bin Xu, Zongjun Xia, Zhifei Chen, Yudi Yao, Jiang Wang
Concrete-filled steel tube (CFST) members have been widely used in skyscrapers and long-span bridges. Non-uniformly distributed hydration heat during curing, inadequate compaction during construction and unavoidable shrinkage and creep of mass concrete in service most likely lead to interface debonding defects between concrete core and steel tube, which has been a common concern. The development of
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Performance investigation of highway bridge pier columns under the sequential effects of fire followed by vehicle collision and subsequent air blast: A numerical investigation Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-26 Qusai Alomari, Daniel G Linzell, Chen Fang
Historically, it has been demonstrated that bridges may be vulnerable to fire, and in many circumstances, resulting damage might not be apparent, and bridges could maintain acceptable levels of serviceability. In the absence of proven assessment tools and given the limited research that addresses bridge fire, research that better understands response and strives to improve highway bridge resiliency
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Experimental study on the flexural behavior of partially encased composite beams with corrugated steel webs Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-23 Liusheng Chu, Xinwei Guo, Jie Li, Xiaomeng Xie, Danda Li, Xing Ma
Combining the advantages of partially encased composite structure (PEC) and corrugated steel web, a new type of composite PEC beam with corrugated web was proposed in this paper, namely corrugated webbed PEC (CWPEC) beam. In order to investigate the structural performance of the proposed CWPEC beams, four specimens were designed and fabricated. Four-point bending tests were carried out to study their
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Full-scale aerodynamic study on the effects of tower wind shields and road-sign gantries on passing high-sided vehicles in the tower region at the Queensferry Crossing Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-22 Licheng Zhu, Daniel McCrum, Jennifer Keenahan
A novel investigation into the impact of the tower road-sign gantry and the tower shielding on double-decker buses and trucks passing by the bridge tower based on a previously validated full-scale CFD model. Two sets of simulations were conducted for comparison of aerodynamic force conditions of vehicles as they pass by the bridge tower: first group of simulations were performed including and excluding
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Seismic behavior of horizontally spliced single-side superposed shear wall using a concealed column Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-19 Kai Xu, Lunhai Zhi, Wei Ma, Kang Zhou
The single-side superposed (SSS) shear wall is an innovative precast concrete sandwich panel that better meets the requirements of building industrialization. However, the seismic behavior of SSS shear walls remains inadequately understood. In this paper, a full-scaled horizontally spliced SSS shear wall using a concealed column and an integral SSS shear wall of the same dimensions were tested. The
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Experimental and numerical study of the three-dimensional temperature field in the arch ribs of the reinforced concrete ribbed arch bridge during construction Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-19 Zhongchu Tian, Zujun Zhang, Zhengqian Wu, Wenping Peng, Binlin Xu
The unique structural design of an arch ring featuring varying inclination angles for individual segments causes variations in the longitudinal distribution of the temperature field d along the arch axis. This study aims to enhance the understanding of temperature fields in reinforced concrete (RC) arch bridges with diverse arch ring structural configurations during their construction phases. A comprehensive
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Experimental study on the aerodynamic characteristics of combined angle transmission tower subject to skew wind Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-18 Guohui Shen, Linghui Que, Hua-Ping Wan
The transmission towers served as crucial carriers in the process of power transmission. The combined angle transmission tower of dual-angle steel with cruciform section are relatively a novel type of angle tower, which is being more widely used in transmission lines. The studies on aerodynamic characteristics of combined angle tower in skewed wind are limited. In this paper, the wind tunnel tests
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Performance evaluation of cable-stayed bridge expansion joints based on Lasso dimensionality reduction and temperature-displacement-correlation model Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-06 Tugang Xiao, Yu Hong, Jingye Xu, Qianhui Pu, Xuguang Wen
Expansion joints play a crucial role in accommodating the longitudinal movement of the main beam, which is mainly caused by temperature variation. This paper establishes an accurate model that relates the temperature field of the main beam to the displacement of the expansion joint, enabling reliable performance prediction and early warning of the expansion joint. Firstly, three commonly used methods
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Research on the deformation and settlement characteristics of tunnel lining structures based on distributed fibre optic sensing technology Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-06 Fengyuan Wu, Wei Sheng, Guanhua Zhang, Hongnan Li, Yuhao Ren, Kexin Zhang, Chao Wang, Tong Sun
To study the deformation and settlement characteristics of tunnel lining structures, a tunnel lining structure model was designed based on distributed fibre optic sensing technology. Compared to the cylindrical model used in traditional tunnel lining structural model experiments, in this study, a reinforced concrete structural model was adopted, which can embed fibre optics in the structure, which
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Bending resistance mechanism of prestressed ultra-high performance concrete - reinforced concrete beam based on a full-scale experiment Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-05 Xiangdong Sun, Yuquan Ma, Feng Jiang, Xueming Fan, Honglin Wu
Ultra-High Performance Concrete (UHPC) is a new type of engineering material with high compressive strength, high tensile strength, and high fracture toughness. Its bending failure mechanism is different from that of traditional concrete beams, which requires a new computational model to describe the bending failure phenomena of the prestressed ultra-high performance concrete - reinforced concrete
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Study on structural performance of repaired reinforced concrete beams with partially debonded longitudinal rebars Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-05 Tsubasa Hattori, Hiroyasu Sakata, Yusuke Maida, Akihiro Kawahara, Toshio Maegawa
In order to evaluate the structural performance of repaired RC beams with partially debonded longitudinal rebars, structural experiments were conducted. In the experiments, real-scale and half-scale RC beam specimens underwent cyclic loading of 1.0% or less in terms of deformation angle, repaired with epoxy resin injection method, and multiple cyclic loading again. As a result of the experiments, damage
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A new constitutive model of shape memory alloy and its seismic mitigation capacity compared with existing models Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-04 Jinlong Liu, Chen Chen, Junqi Lin, Zhile Yang
The existing constitutive models of shape memory alloy (SMA) cannot accurately describe the mechanical behavior in martensitic strengthening segment since their loading and unloading paths in strengthening segment completely overlap. This study proposes a multi-segment linear mathematical model for SMA, which realizes the separation of loading path and unloading path in strengthening segment. A four-story
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Fatigue performance analysis of precast segmental assembled concrete beams Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-04 Yan Liang, Shun-En Ren, Ming-Na Tong, Jiang-Nan Zhu, Li Yan
In recent years, assembled bridges have become widely utilized in bridge construction, raising concerns about durability-related bridge diseases over time. These issues significantly impact the fatigue life of assembled bridges, necessitating an in-depth exploration of their fatigue performance. While existing research primarily concentrates on the transverse connection of multiple longitudinal beams
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Simulation and design model for reinforced concrete slabs with lacing systems Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-02 Saif Khudhair Ali Al-Tameemi, Ehab G Al-hasany, Hussein Kareem Mohammad, Hussain A Jabir, Teghreed H Ibrahim, Abbas A Allawi, Ayman El-Zohairy
Lacing reinforcement plays a critical role in the design and performance of reinforced concrete (RC) slabs by distributing the applied loads more evenly across the slab, ensuring that no specific area of the slab is overloaded. In this study, nine slabs, divided into three groups according to the investigated parameters, were meticulously designed and evaluated to study the interplay between the lacing
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Effect of strengthening by carbon fiber reinforced polymer sheets on the flexural behavior of reinforced self-compacting concrete beams under repeated loads Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-02 Ali Ghanim Abbas AL-Khafaji, Sabah Hashim Muhammed, Awad Jadooe, Muhammad Abdulredha
This study investigates the effect of strengthening self-compacted concrete (SCC) beams using CFRP sheets on flexural behaviour subjected to repeated loads. During the experiment, six rectangular reinforced SCC beams were evaluated; two were reference beams without strengthening, while the remaining four were strengthened with CFRP sheets. The beam’s length, depth, and width are 2100 mm, 300 mm, and
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Improved softened truss model of prestressed concrete box girders subjected to combined bending and torsion Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-03-01 Hao Zhang, Qiu Zhao, Feng Xiao, Yiyan Chen, Xiaoqiang Yang
Prestressed concrete (PC) box girder is an innovative structure that is widely used in large-span bridges. Under eccentric loads such as vehicles, PC girders are inevitably under combined bending and torsion. To study its bending-torsional behavior, a refined full-range analysis model based on the combined action softening truss model (CA-STM) was proposed, where a simple and effective solution procedure
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The development of a prototype footbridge composed of biological self-healing and ultra-high-performance concretes Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-28 Ronaldas Jakubovskis, Aleksandr Sokolov
Developments in concrete technologies have allowed engineers to design lightweight, slender, and aesthetically attractive structures. The application of new concrete types in real projects, however, is uncommon. The lack of regulation, uncertainty in material performance, and the absence of successfully implemented projects hinders the use of modern concretes in everyday design projects. The present
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Bearing condition assessment of a simply elastic supported beam based on impact vibration testing Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-28 Qi Xia, Jiang-wei Zhou, Ya-ru Yang, Lin-qing Wang, Jian Zhang
The mechanical properties of bridge bearings gradually deteriorate over time, resulting from daily traffic loading and harsh environmental conditions. However, efficient detection of in-service bridge bearings is still challenging, especially in quantifying support stiffness. This study presents a bridge bearing condition assessment framework of a simply elastic supported beam based on impact vibration
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Strengthening reinforced concrete bridge piers against heavy vehicle collisions with ultra-high performance concrete collars: A finite element analysis study Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-27 Chunpeng Qu, Farhad Farzaneh, Sungmoon Jung, Qian Zhang
This paper investigates the effectiveness of ultra-high performance concrete (UHPC) collars in strengthening reinforced concrete (RC) bridge piers against heavy tractor-trailer collisions through finite element (FE) analysis. First, validated FE models of UHPC and a heavy tractor-trailer were provided. Then, FE analyses were conducted to evaluate the strengthening performance of the UHPC collar. The
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Cold–formed thin–walled steel walls filled with phosphogypsum subjected to lateral cyclic loading: testing and analysis Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-19 Song Hu, Li Zhou, Yong Huang
In order to improve the shear capacity and seismic performance of cold–formed thin–walled steel (CFS) walls, in this research, a novel CFS wall filled with phosphogypsum (PG) was developed. Taking PG filling area and covering the wall with sheathing as design parameters, four full–scale test specimens were designed and constructed. Failure mode and seismic performance indexes of each specimen were
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Efficient calculation of higher order time history response derivatives by substructuring method Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-10 Jiajing Li, Qiaoyun Wu, Shun Weng
Time history response derivatives with respect to the design variables are frequently used in optimization design, damage detection, structural control, etc. This paper proposes a substructuring method for efficient calculation of higher order time history response derivatives of large-scale structures. First, the global structure is disassembled into several small substructures and the substructural
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Experimental study on axial compression properties of concrete filled steel tubular stub columns in varying ambient temperature Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-10 Li Wang, Biao Liu, Zi-Qi Li, Yu-Xing Zhang, Lu-Song Yu
To better understand the mechanical property issues of in-service concrete-filled steel tube (CFST) bridges susceptible to natural environmental temperatures, 13 CFST stub columns were assessed under axial compression with different ambient temperatures and steel ratios, with the strength of the core concrete as the main parameters. The influence of ambient temperature on the peak strain and joint
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Flexural behavior of concrete beams hybrid-reinforced with glass fiber-reinforced polymer, carbon fiber-reinforced polymer, and steel rebars Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-09 Hilal Terzioglu, Meltem Eryilmaz Yildirim, Omer Karagoz, Esref Unluoglu, Mizan Dogan
The utilization of fiber-reinforced polymer (FRP) reinforcements in structural design is increasing due to their non-corrosive nature. However, the anisotropic features and linear elastic behavior of FRP rebars have led researchers to explore the use of hybrid combinations of FRP and steel reinforcements. Current codes and guidelines predominantly focus on the design of glass FRP (GFRP) reinforced
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Reliable design rules for cold-formed ferritic stainless steel closed built-up beams Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-08 C Karthik, M Anbarasu, Mohammad Adil Dar
In the companion paper, test results were presented to explore the flexural performance of cold-formed ferritic stainless steel (FSS) closed built-up beams. Each specimen was fabricated by joining two lipped channels in a face-to-face configuration and securing them with spot welds at intermediate points along the beam span. Sectional aspect ratio, compression flange’s sectional slenderness and moment
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Residual axial strength of reinforced concrete columns after exposure to standard and non-standard fires Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-07 Vui Van Cao, Sang Tan Ngo
This study investigated the residual axial strength of reinforced concrete (RC) columns after exposure to standard and non-standard fires. Experiments and theoretical analyses were performed on 30 RC columns, which were divided into five groups: one group (the control group) was not exposed to fire; two groups were exposed to 30-min and 45-min ISO 834 standard fires; and the other two groups were exposed
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Rock anchor hanger effect on single-tower earth-anchored suspension bridge mechanical performance: An analytical model and multi-objective golden eagle optimization Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-02-05 Yu-peng Chen, Wen-ming Zhang
The application of a composite saddle in single-tower earth-anchored suspension bridges (STEASBs) replaces the tower on the steep slope side, which is a cost-effective solution that improves bridge safety and provides environmental protection for the steep bank slope of the valley. However, this novel bridge design needs an appropriate model to evaluate the effect of rock anchor hangers on the structure
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Static performance of precast concrete arches with carbon fiber reinforced polymer reinforcement Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-27 Xing Zhao, Jiannan Zhou, Xinli Kong, Yishun Chen, Peng Wang, Jin Wu
In this paper, static performances of a new precast concrete arch system with carbon fiber reinforced polymer (CFRP) reinforcement were investigated. Varied concrete strengths and segment types of precast concrete arches were tested. The results show that the increase of concrete strength can improve the bearing capacity of the precast arches with CFRP reinforcement. The ultimate bearing capacity of
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In-situ measurements of temperature and strain fields of large-diameter concrete-filled steel tube columns and the refined finite element modeling Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-24 Xiaofan Liu, Zhangxuan Wang, Bin Bai, Tao Wang, Teng Tong, Xiaobo Li
Concrete-filled steel tube (CFST) columns are prevalent in transmission towers and arch bridges due to their cost-effectiveness and superior mechanical performance. The growing megastructures lead to large-diameter CFST components, which are exposed to the risk of early-age thermal concrete cracking. In this study, temperature and strain fields of two 2.1 m-dia. CFST columns were monitored in-situ
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Accurate rotation identification of flexural structures using long-gauge fiber optical sensors Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-24 Huang Huang, Zhishen Wu, Xin Wang
The rotation of beam and column components is a key parameter in structural health monitoring (SHM), which providing analysis of bending deformation, evaluation of structural stability, and overall structural performance. Conventional sensors directly measuring rotation are typically designed assuming linear behavior. It becomes challenging to achieve precise and rapid measurements of small deformations
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Structural damage identification under ambient temperature variations based on CNN and normalized modal flexibility-autoregressive coefficients hybrid index Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-18 Jianfeng Gu, Chunyan Xiang, Jin Luo, Minshui Huang, Hexu Liu, Chang Sun, Yuhou Yang
This study proposes a novel method to identify structural damage considering ambient temperature variations. In this method, the normalized modal flexibility based index (nMFBI) and autoregressive (AR) coefficients are combined to form the nMFBI-AR hybrid index, and convolutional neural networks (CNN) are exploited to locate and quantify the damage. Moreover, the effects of ambient temperature variations
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Nonlinear bond-slip model for fiber-reinforced polymer laminates externally bonded to thermally damaged concrete Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-16 Heng-Da Lv, Wen-Jian Xie, Wan-Yang Gao
This paper presents a novel nonlinear local bond-slip model for fiber-reinforced polymer (FRP) laminates externally bonded to thermally damaged concrete substrates. The proposed model is an extension of an existing two-parameter bond-slip model and incorporates two key parameters including interfacial fracture energy ([Formula: see text]) and interfacial brittleness index ([Formula: see text]). To
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Vertical stiffness limit of 400 km/h high-speed railway simple-supported bridge considering excitation randomness Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-16 Xuli Chen, Huoyue Xiang, Jin Zhu, Yongle Li
Vertical stiffness of the bridge is of paramount importance in guaranteeing optimal driving performance for high-speed railway (HSR) trains. Initially, the Auto Regression and Moving Average model with eXogenous input (ARMAX) model is employed as the surrogate model for the train-bridge (TB) coupling system. Then, the framework for analyzing vertical bridge stiffness is proposed employing the surrogate
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Mesoscale modeling of flexural fracture behavior in steel fiber reinforced concrete Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-10 Yong Yu, Jinjun Xu, Weisen Chen, Bo Wu
This paper presents a computational study on the flexural fracture behaviors of steel fiber reinforced concrete (SFRC). The focus is on investigating the impacts of various factors on SFRC, utilizing a discrete-continuum coupled finite element method. This method explicitly models each material phase, including coarse aggregates, mortar paste, steel fibers and interfacial transition zones (ITZs), allowing
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On the effectiveness of sparse regularization for structural damage diagnosis using dynamic strain measurements Adv. Struct. Eng. (IF 2.6) Pub Date : 2024-01-10 Peng Ren, Chunfeng Yang, Baojun Yuan
Strain measurement is considered inherently suitable for structural health monitoring due to the ease of extracting damage-sensitive features. However, the need for pre- and post-damage feature extraction, especially in the absence of baseline data for aging infrastructures in service, has engendered skepticism concerning the practical efficacy of strain-based damage diagnosis. To address this, this
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Temperature behavior of cable-stayed bridges. Part II — temperature actions by using unified analysis Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-15 Yushi Shan, Qiang Jing, Lingfang Li, Wenbo Gao, Zili Xia, Yong Xia
The temperature action of long-span cable-stayed bridges is complicated because of the high indeterminacy of their structure. Previous studies on the temperature behavior of bridges were either lim...
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Durability of bond between carbon/glass hybrid fiber-reinforced polymer (HFRP) bar and concrete in water Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-15 Gaojie Xu, Yixun Yu, Yunfeng Pan, Biao Li
Glass-fiber-reinforced polymer (GFRP) bars have been widely used as a reinforcement in concrete, and glass fibers are susceptible to reacting with alkali ions in concrete pores. Thus, carbon fibers...
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Shear capacity estimation of core steel tube reinforced PCCC column-beam interior joint under quasi-static load Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-12 Yuan Fang, Feng Yu, Chaochao Feng, Xing Chen, Siyong Tan
In this study, the quasi-static tests were conducted on 13 core steel tube (CST) reinforced PVC-CFRP confined concrete (PCCC) column-beam interior joints. Distinct shear failure occurred in all joi...
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Machine learning based prediction model for plastic hinge length calculation of reinforced concrete structural walls Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-12 Mohammad Sadegh Barkhordari, Akram Jawdhari
Reinforced concrete structural walls (RCSWs) are integral part of buildings and other structures and are used to carry in-plane and out-plane loads. For assessment purposes and to ensure safety and...
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Push-Out experiments on bearing capacity of perfobond leiste shear connectors after hydrochloric acid corrosion Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-12 Wenjing Qiao, Zhiyong Wang, Fan Yang, Baojun Zhao, Yunlong Li
The paper study the shear bearing performance and failure mechanism of perfobond leiste (PBL) shear connectors after hydrochloric acid corrosion. Seven groups of specimens with PBL shear connectors...
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Track vibration sequence anomaly detection algorithm based on LSTM Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-09 Liu Jie, Liu Fang, Xie Weiping, Ju Xiaoxiong
Subway structure monitoring obtains structure monitoring data in real time, and the obtained subway track vibration sequence exhibits obvious time series characteristics. Therefore, the difficultie...
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Reinforcement detailing of connections between perpendicular hollow precast walls Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-07 Ricardo Carmo, Ricardo Martins, MRT Arruda, Hugo Costa, Divaldo Valente, Jónatas Valença, Eduardo Júlio
The pre-wall system can be used in the construction of buildings, with multiple advantages in terms of production time and environmental impact. This type of walls is formed by two thin precast con...
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Temperature behavior of cable-stayed bridges. Part I — Global 3D temperature distribution by integrating heat-transfer analysis and field monitoring data Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-06 Yushi Shan, Lingfang Li, Qi Xia, Wenbo Gao, Qiang Jing, Yong Xia
Varying temperatures significantly affect long-span cable-stayed bridges. However, quantitative studies on their temperature behaviors are limited. Existing studies focus on 2D or 3D models of brid...
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Bearing capacity of seawater sea sand recycled aggregate concrete beams reinforced with glass fiber reinforced polymer bars Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-06 Kaijian Zhang, Jianzhuang Xiao, Xiaolong Hu, Qingtian Zhang
In this study, seawater, sea sand and recycled coarse aggregate (RCA) are combined to prepare seawater sea sand recycled aggregate concrete (SSRAC) for use in beams. Nine beams are reinforced with ...
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Shear strengthening of normal steel reinforced concrete beams using post-tensioned metal straps fully wrapped around the beams Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-05-05 Wrya Abdullah
Using post-tensioned metal straps (PTMS) as a method of strengthening reinforced concrete building members is relatively new, however, it has been tested mostly on small specimens. Therefore, this ...
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Substructural damage identification using autoregressive moving average with exogenous inputs model and sparse regularization Adv. Struct. Eng. (IF 2.6) Pub Date : 2023-04-11 Hong Yu, Hongping Zhu, Shun Weng, Wangqing Wen, Aiguo Yan, Xingsheng Yu
Substructuring approaches possess many superiorities over traditional global approaches in damage identification because large-size global structures are replaced by small and manageable substructu...