不同平面尺寸平板网架结构地震响应分析  

SEISMIC RESPONSE ANALYSIS OF FLAT GRID STRUCTURES WITH DIFFERENT PLANAR DIMENSIONS

作　　者：翁俊湧 周占学[1,3] 周小龙 贾吉龙[1,3] 张堃 WENG Junyong;ZHOU Zhanxue;ZHOU Xiaolong;JIA Jilong;ZHANG Kun(Hebei University of Architecture,Hebei Zhangjiakou 075000,China;Hebei Innovation Center of Prefabricated Construction and Underground Engineering,Hebei Zhangjiakou 075000,China;Hebei Key Laboratory of Diagnosis,Reconstruction and Anti-disaster of Civil Engineering,Hebei Zhangjiakou 075000,China)

机构地区：[1]河北建筑工程学院,河北张家口075000 [2]河北省装配式建造与地下工程技术创新中心,河北张家口075000 [3]河北省土木工程诊断、改造与抗灾重点实验室,河北张家口075000

出　　处：《低温建筑技术》2024年第12期40-44,共5页Low Temperature Architecture Technology

基　　金：国家自然科学基金项目(52078476)。

摘　　要：为探究不同视波速下网架结构需考虑行波效应的临界视波速与最小平面尺寸的关系,文中采用时程分析法对结构模型进行多点输入和一致输入的对比分析,统计特殊杆件的分布及占比情况。研究结果表明,随着视波速减小,在行波效应随之增大的一般规律下,特殊杆件均呈现由跨边向跨中蔓延的趋势;随结构长度的增加,特殊杆件占比也随之增加;临界视波速与结构长度有关,与结构跨度无明显相关性,结构越长,临界视波速值就越大。由此可见,须考虑多点输入下的临界视波速与结构长度两者绝对值呈线性关系,即V=20L。To investigate the relationship between the critical apparent wave velocity(AWV)requiring consideration of the traveling wave effect and the minimum planar dimension of a space frame structure,a time-history analysis method was employed.The study compared multi-point input with uniform input for structural models,analyzing the distribution and proportion of special members.The results show that as the AWV decreases,the traveling wave effect intensifies,and special members tend to extend from the edges toward the center of the span.The proportion of special members increases with the length of the structure.The critical AWV is related to the structural length but shows no significant correlation with the span.Longer structures correspond to higher critical AWV values.It is evident that under multi-point input conditions,the absolute value of the critical AWV has a linear relationship with the structural length,expressed as V=20L.

关 键 词：视波速 行波效应 平板网架 平面尺寸 时程分析法 

分 类 号：TU311.3[建筑科学—结构工程]