Vibration Serviceability of Large-Span Steel–Concrete Composite Beam with Precast Hollow Core Slabs Under Walking Impact
作者机构：School of Civil Engineering&Key Laboratory of New Technology for Construction of Cities in Mountain AreaMinistry of EducationChongqing UniversityChongqing 400045China Central-South Architectural Design Institute Co.Ltd.Wuhan 430071China Department of Civil EngineeringThe Pennsylvania State UniversityPA 17057USA
出 版 物：《Engineering》 (工程（英文）)
年 卷 期：2022年第19卷第12期
页 面：93-104页
核心收录：
学科分类：08[工学] 081402[工学-结构工程] 081304[工学-建筑技术科学] 0813[工学-建筑学] 0814[工学-土木工程]
主 题：Composite beam Hollow core slab Walking force Floor vibration Mode shape
摘 要：A large-span steel–concrete composite beam with precast hollow core slabs(CBHCSs)is a relatively new floor structure that can be applied to various long-span ***,human-induced vibrations may present serviceability issues in such *** alleviate vibrations,both the walking forces excited by humans and the associated floor responses must be *** this study,150 load–time histories of walking,excited by 25 test participants,are obtained using a force measuring *** dynamic loading factors and phase angles in the Fourier series functions for one-step walking are ***,walking tests are performed on seven CBHCS specimens to capture the essential dynamic properties of mode shapes,natural frequencies,damping ratios,and acceleration time *** CBHCS floor system generally exhibits a high frequency(10 Hz)and low damping(damping ratio2%).Sensitivity studies using the finite element method are conducted to investigate the vibration performance of the CBHCS floor system,where the floor thickness,steel beam type,contact time,and human weight are ***,analytical expressions derived for the fundamental frequency and peak acceleration agree well with the experimental results and are hence proposed for practical use.
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