SummaryIn order to study the dynamic characteristics and human‐induced vibration response of light steel foamed concrete composite floor (LCSF), the vibration characteristics of 4.2 m × 5 m LCSF model were tested under the condition of opposite side support, and the natural vibration frequency of LCSF was obtained. The orthogonal anisotropic elastic plate and the simulated beam element were used, respectively, to compute the natural vibration frequency of the LCSF, and the estimated findings were compared with those obtained from measurements. The discrepancy between the calculated results and the measured results of the approximate beam element using the natural vibration frequency calculation technique is around 13%, but the error for the plate element using the calculated results and the tested results is about 23%. To examine the floor's vibration response under the factors of step frequency, walking path, pedestrian density, and load distribution, the LCSF underwent a human‐induced vibration test. The test results show that the fundamental frequency of the LCSF specimen is about 11 Hz, which can meet the requirements of the specification. However, the vibration response of the LCSF specimen under different conditions of pedestrian load is significantly different. With the acceleration of step frequency and the increase and concentration of load, the floor's vibration response becomes more visible. In the route test, it is established that LCSF has the attribute of a unidirectional plate. The natural vibration frequency of similar floor slab can be calculated by the method of simulating the natural vibration frequency of beam element. The findings can serve as a guide for LCSF research and implementation.

中文翻译：

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轻钢泡沫混凝土组合楼板基频及人致振动特性试验研究

摘要：为研究轻钢泡沫混凝土组合楼板（LCSF）的动力特性及人致振动响应，对4.2 m×5 m LCSF模型在对侧支撑条件下进行振动特性测试，得到自振频率。获得了 LCSF。分别使用正交各向异性弹性板和模拟梁单元计算LCSF的自振频率，并将估计结果与测量结果进行比较。采用自振频率计算技术的近似梁单元的计算结果与实测结果的误差在13%左右，而板单元的计算结果与实测结果的误差在23%左右。为了检查地板在步频、步行路径、行人密度和负载分布等因素下的振动响应，LCSF 进行了人为振动测试。测试结果表明，LCSF试件的基频约为11 Hz，能够满足规范的要求。然而，LCSF试件在不同行人荷载条件下的振动响应存在显着差异。随着阶跃频率的加快和荷载的增加和集中，地板的振动响应变得更加明显。在路由测试中，确定LCSF具有单向板的属性。类似楼板的自振频率可以通过模拟梁单元自振频率的方法来计算。研究结果可以作为 LCSF 研究和实施的指南。