Analysis and experimental research of floor structure random vibration under crowd load

被引：0
|
作者：
Zhou C. [1 ,2 ]
Zhang Z.-Q. [1 ,2 ]
Zhang X.-F. [3 ]
Li A.-Q. [2 ,4 ]
机构：
[1] Key Laboratory of Concrete and Pre-stressed Concrete Structures of the Ministry of Education, Southeast University, Nanjing
[2] School of Civil Engineering, Southeast University, Nanjing
[3] Department of Architectural Engineering and Construction Science, Kansas State University, 66506, KS
[4] Beijing University of Civil Engineering and Architecture, Beijing
来源：
Zhendong Gongcheng Xuebao/Journal of Vibration Engineering | 2019年 / 32卷 / 01期
关键词：
Comfort level; Dynamic test; Large-span floor; Social force model; Stochastic pedestrian loads;
D O I：
10.16385/j.cnki.issn.1004-4523.2019.01.005
中图分类号：
学科分类号：
摘要：
It is of great significance to reveal the random vibration characteristics and real response of structures under the crowd load by introducing the randomness of crowd walking when analyzing the vibration comfort of large-span floor. Firstly, random walking load curves based on social force model were generated and then Monte-Carlo method was used to propose the random vibration analysis method of large-span floor in time domain. Secondly, the equivalent synchronous pedestrian formula was fitted by considering the randomness of the population distribution, frequency and phase, and then it is used to establish an equivalent deterministic analysis method of random vibration. Finally, the dynamic test of the floor structure was carried out. The dynamic characteristics of the structure and the random vibration response were obtained, and compared with the results of numerical simulation analysis. The results show that the average errors between the dynamic test results of the floor structure and the stochastic simulation method, and between the dynamic test results and the equivalent deterministic analysis method are 22.79% and 21.50%, respectively. By comparision, it is shown that the error of stochastic simulation method is less under resonance conditions, while the error of equivalent deterministic analysis method is less under non-resonance conditions. Thus, it is suggested to combine these methods when considering practical engineering problems. © 2019, Nanjing Univ. of Aeronautics an Astronautics. All right reserved.
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页码：37 / 48
页数：11
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