基于复杂人致激励作用下的楼盖振动响应分析  

Analysis of Floor Vibration Responses Based on Complex Human-Induced Excitation

作　　者：符胜男 王斌 FU Shengnan;WANG Bin(Tianjin Institute of Urban Construction,Tianjin 300384,China)

机构地区：[1]天津城建大学土木工程学院,天津300384

出　　处：《工业建筑》2022年第3期123-131,共9页Industrial Construction

基　　金：国家自然科学基金项目(51978186);天津市科技支撑计划(19YFZCSN01180)。

摘　　要：为探究体育馆楼盖结构在复杂激励下的振动力学性能,使用动态信号采集分析系统,以试验的方式测定体育馆的不同分布试点的速度响应及能量分布变化规律,全程研究分析楼盖在单人和双人激励下的振动特性,通过试验分析总结得出,各个试点的能量分布受到支撑的约束形式、不同种类的激励模式、加载激励的位置等因素影响,其中,加载在不同分布试点的激励位置是决定能量分布规律的主要因素。相对于行走、跳跃、奔跑、Bounce等不同激励类型而言,跳跃激励相对于Bounce激励具有更多的输入能量,使各试点的响应呈现出更规律的拍振形式,而Bounce荷载作用下的能量被楼盖吸收,使结构呈现出一种随机动力响应。In order to explore the vibration dynamic performance of the gymnasium floor structure under complex excitation,a dynamic signal acquisition and analysis was used system to experimentally determine the speed response and energy distribution change rules of different distribution pilots of the gymnasium.The vibration characteristics under the excitation of single people and two people were summarized through experimental analysis.The energy distribution of each pilot site was affected by factors such as the supported constraints,different types of excitation modes,and the location of the loaded excitation.Among them,the excitations loaded in different distribution pilotss locations was the main factor which determined the law of energy distribution.Compared with different excitation types such as walking,jumping,dancing,and bouncing,jumping excitation had more input energy than bouncing excitation,so that the response of each pilot exhibited a more regular form of beat vibration.The energy was absorbed by the floor,showing a random structural dynamic response.

关 键 词：人致荷载 复杂激励 振动特性 速度响应谱 

分 类 号：TU311.3[建筑科学—结构工程]