大跨度格构式拱结构对行波效应的响应研究
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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 single 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.
Taking a 100 m span single 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.
引文
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[4]GB50011-2010建筑抗震设计规范[S].
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[6]周全智.大跨空间结构考虑行波效应的弹塑性地震反应分析[D].天津:天津大学,2006.
[7]王波.非一致地震激励下大跨度空间结构的响应研究[D].天津:天津大学,2002.
[8]郑三念.重庆菜园坝长江大桥地震行波效应分析[D].重庆:重庆大学,2007.
[9]李云.大跨度结构在多点地震动激励作用下的反应分析[D].北京:北京交通大学,2008.
[2]Kiureghian A D,Neuenhofer A.A Coherency Model for Spa-tially Varying Ground Motions[J].EESD,1996,25:99-111.
[3]谢开仲.大跨度钢管混凝土拱桥非线性地震反应分析与研究[D].南宁:广西大学,2005.
[4]GB50011-2010建筑抗震设计规范[S].
[5]李海旺,李建仙.钢管拱桁架在地震作用下的动力响应研究[J].科技情报开发与经济,2007(8):144-146.
[6]周全智.大跨空间结构考虑行波效应的弹塑性地震反应分析[D].天津:天津大学,2006.
[7]王波.非一致地震激励下大跨度空间结构的响应研究[D].天津:天津大学,2002.
[8]郑三念.重庆菜园坝长江大桥地震行波效应分析[D].重庆:重庆大学,2007.
[9]李云.大跨度结构在多点地震动激励作用下的反应分析[D].北京:北京交通大学,2008.
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