大跨度格构式拱结构对行波效应的响应研究  

THE TRAVELING WAVE EFFECT RESEARCH OF LARGE-SPAN LATTICE ARCH STRUCTURE

作　　者：刘华宇[1] 陈波[1] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《钢结构》2011年第10期1-4,共4页Steel Construction

摘　　要：以100m跨度的单榀钢管拱桁架屋盖为研究对象,研究分析其在水平和竖向行波效应作用下的多遇地震响应,得出行波效应的影响是显著的,其对结构的影响有利有弊,并且对大部分杆件和节点的影响随着波速的下降而越发不利,行波效应作用下内力和位移响应与一致激励相比,存在明显的滞后现象,当波速很大时,内力和位移反应的波形与一致激励下的波形基本重合。Taking a 100 m span singie frame steel arch roof as research object,it is researched the responses of this roof under horizon and vertical traveling wave effect from frequent earthquake,getting the results that traveling wave effect has obvious influence, the influences has both advantages and disadvantages. Most of the rods and nodes are more adverse with the wave velocity decreasing. Comparing with consistent excitation the internal force and displacement response under traveling wave exists obvious lag phenomenon, when wave velocity is very big, the waveform of internal force and displacement response basically overlaps with that of the consistent excitation.

关 键 词：大跨度格构式拱 多遇地震 行波效应 大质量法 

分 类 号：TU392.3[建筑科学—结构工程]