基于冗余度理论设计RC框架结构振动台试验研究  

Shaking Table Test Research of RC Frame Structure Designed by the Redundancy-based Theory

作　　者：罗开海[1] 左琼[1] 保海娥[1] 齐娟[1] 姚志华 Luo Kai-hai;Zuo Qiong;Bao Hai-e;Qi Juan;Yao Zhi-hua(China Academy of Building Research, Beijing 100013, China)

机构地区：[1]中国建筑科学研究院,北京100013

出　　处：《工程抗震与加固改造》2018年第2期62-70,共9页Earthquake Resistant Engineering and Retrofitting

基　　金：建筑安全与环境国家重点实验室基金项目

摘　　要：为检验和验证基于冗余度理论的抗震设计方法的有效性和工程可操作性,本文以汶川地震中某震害严重的RC框架结构为原型1,在保持建筑功能不变的前提下,通过调整结构布局和提高性能目标设计了原型2,以1∶5的比例制作了两个模型进行同台对比试验。试验中选取了汶川地震三组实际地震记录作为输入激励,进行了主震余震型地震模拟试验。试验结果表明,模型2的Y向基本频率大于模型1,层间位移角小于模型1,说明模型2的结构布局调整效果明显;模型2的扭转效应大于模型1,说明实际工程中增设翼墙时应注意把握均匀、对称的布置原则,避免产生过大的扭转效应;从构件应变反应看,模型1背立面柱子是结构抗倒塌的关键构件,模型2远离刚心的角柱是抗倒塌的关键构件;两模型均可达到预期的大震不倒的性能目标,但模型2具有更好的抗震性能和更大的抗倒塌能力。In order to check and prove the effectiveness and the engineering applicability of the redundancy-based seismic design method,taking a RC frame structure damaged severely during Wenchuan earthquake as the prototype 1,under the premise of maintaining building function,the prototype 2 is designed in this paper through the adjustment of the layout of the structure and the improvement of the performance objectives,and the two shaking table models with the same baseplate are manufactured according to the scale of 1： 5. During the test,three groups of real records of the Wenchuan earthquake are selected as the input excitations,and a main-aftershock type earthquake simulation test is performed. The experimental results show that,the fundamental frequency of the model 2 in the direction of Y is greater than that of model 1,and the drift is less than model 1; the torsion effect of model 2 is greater than that of model 1; the columns on the back facade of model 1 are the key components of collapse resistance of structures,and the key component of model 2 is corner column far from the stiffness center; the two models can satisfy the requirements of no-collapse under the expected rare earthquake,but model 2 has better seismic performance and greater anti-collapse capacity.

关 键 词：冗余度 建筑抗震 振动台 试验 

分 类 号：TU375.4[建筑科学—结构工程]