柱面网壳结构的竖向地震行波反应分析  

Seismic Response Analysis of a Cylindrical Reticulated Shell Under Vertical Traveling Wave Excitations

作　　者：田仲业[1] 楼梦麟[1] 

机构地区：[1]同济大学土木工程防灾国家重点实验室,上海200092

出　　处：《结构工程师》2012年第6期1-7,共7页Structural Engineers

基　　金：科技部国家重点实验室基础研究资助项目(SLDRCE08-A-07)

摘　　要：以某电厂干煤棚为例,应用有限元方法,分别计算了竖向一致激励与行波激励时大跨度柱面网壳结构的地震反应,然后根据计算结果比较了两种地震输入下结构动力反应的不同特点。数值分析表明:不同地震输入条件下的结构地震反应峰值存在较大的差异,基本上随输入地震的行波波速的减小呈单调递减变化。进一步研究还表明:当行波波速为某一特定值时,结构的某些反应的变化与单调变化规律并不完全一致,存在行波共振的现象。Seismic responses of a long span cylindrical reticulated shell of a dry-coal-shed in a power plant under uniform vertical excitations and traveling wave excitations were analyzed using finite element method. The calculation results under the two seismic inputs were compared. The numerical analysis shows that there are big differences between the peak values of the structural seismic responses under different seismic excita- tions and basically, the values change monotonously with the traveling velocity. Further research shows that at a specific traveling velocity, some structural responses are not consistent with the monotonous change tendency and the phenomenon of traveling wave resonance exists.

关 键 词：地震反应 行波共振 大跨度柱面网壳 一致输入 行波输入 

分 类 号：TU399[建筑科学—结构工程] TU311.3