R.C.框架结构的振动台试验和面向设计的时程分析方法  

SHAKING TABLE TESTS OF R.C. FRAMES AND DEVELOPMENT OFDESIGN-ORIENTED TIME HISTORY ANALYSIS METHOD

作　　者：吕西林[1] 卢文生[1] 

机构地区：[1]同济大学土木工程防灾国家实验室

出　　处：《地震工程与工程振动》1998年第2期48-58,共11页Earthquake Engineering and Engineering Dynamics

摘　　要：钢筋混凝士框架结构的弹塑性时程反应分析是抗震设计规范所要求的一项重要内容，但目前还没有比较简单实用且计算可靠的方法。本文进行了两个六层钢筋混凝土框架结构模型的地震模拟振动台试验，通过分析试验模型的自振特性、变形型式、加速度反应、位移反应和破坏形态以及钢筋混凝上框架结构的实际震害，建立了面向设计的钢筋混凝上框架结构弹塑性时程反应分析的计算方法，在这一方法中，对钢筋混凝上框架整体结构采用层间剪切模型，对钢筋混凝土柱采用四线型恢复力模型，恢复力模型的控制点多数可以按本文给出的方法来确定。通过与振动台试验结果的对比，表明按本文提出的方法计算的钢筋混凝上框架结构的弹塑性地震反应与试验值符合较好，且本文方法简单易行，便于在工程设计中应用。In order to study the seismic behavio r and nonlinear time history analysis raethod for reinfbrced ooncrete Dazne structures, shaking table tests of two six - story reinforced con- crete frame models were carried out at Tongji Univenity recently and the test results are introduced in this paper. By analyzing the dynamic characteristics, deformation patterns, seismic rcsponses of acceleration and displacement, and the failure mechanism of the test models, the nonlinear time history analysis method for this kind of structures is devel- oped in which ' a shear type model' is used as the dynamdc analytical model for the whole structure and 'a semidegrading trilinear model with a desoending branch ' is selected as restocjng force model for the interstory columns , The methctd for determining the parameters of the restoring lbrce model is also given in this paper. Comparison be- tween analytical results and the results of shaking table tests shows that the calculated time histories of the two frame models are agreeable to the tested ones. From the practi- cal points of view, the analytical method developed in this paper is simple and reliable, and it can provide a powerful tool for engineering design.

关 键 词：钢筋混凝土 框架结构模型 振动台试验 面向设计 

分 类 号：TU375.4[建筑科学—结构工程] TU352.104