复杂高层连体结构多点激励地震反应分析  

SEISMIC RESPONSE ANALYSIS OF COMPLICATED CONNECTING TALL STRUCTURES UNDER MULTI-SUPPORT EARTHQUAKE EXCITATIONS

作　　者：桂国庆[1,2] 李永华[3,2] 李思明[3] 

机构地区：[1]井冈山大学,江西吉安343009 [2]南昌大学建筑工程学院,江西南昌330029 [3]同济大学土木工程学院,上海200092

出　　处：《工程力学》2009年第10期95-101,共7页Engineering Mechanics

摘　　要：对高层多塔连体结构进行水平、竖向多点激励下的地震响应时程分析,并针对此结构计算量大的特点采用了子结构法进行自由度缩聚,该法在保证计算精度的前提下大大提高了计算效率,多点激励时考虑了行波效应以及场地部分相干效应。通过对某多塔连体结构的计算分析,结果表明:在水平地震动作用下,考虑多点激励会使连廊杆件轴力有所增大,其中行波效应变化对杆件轴力影响尤为明显;但是在竖向地震动作用下,考虑多点激励会使连廊杆件轴力有所减小。The seismic responses of connecting tall structures with multi-towers under multi-support excitations of bilateral horizontal and vertical seismic actions are numerically simulated by time-history analysis, and a substructure method is carried out. The method uses the technique of matrix reduction to reduce the system matrices to a smaller set of degrees of freedom, and it can result in a significant savings in computer time in the same accuracy. The partial coherence effect and wave passage effect are considered in multi-support excitations. Through the analysis on the seismic responses of a connecting tall structure, the results show that the axial forces of the corridor bars are increased when considering the traveling-wave and the partial coherence in a horizontal orthogonal seismic action, and the wave passage effects are especially prominent, but the axial forces of the corridor bars are decreased when considering the vertical multi-support excitations.

关 键 词：高层连体结构 地震反应 多点激励 行波效应 子结构法 

分 类 号：TU973.2[建筑科学—结构工程] TU311.3