填充墙钢筋混凝土框架结构基于位移的改进抗震设计方法  

Advanced displacement-based seismic design method of reinforced concrete frame structures with infill wall

作　　者：李永梅[1,2] 王浩[1] 彭凌云[1] 周冰 Li Yongmei;WANG Hao;PENG Lingyun;ZHOU Bing(Beijing Key Lab of Earthquake Engineering and Structural Retrofit, Beijing University of Technology,Beijing 100124, China;Key Laboratory of Urban Security and Disaster Engineering of Ministry of Education, Beijing University of Technology,Beijing 100124, China;Beijing Institute of Architectural Design Co., Ltd, Beijing 100045 , China)

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124 [2]北京工业大学城市与工程安全减灾省部共建教育部重点实验室,北京100124 [3]北京市建筑设计研究院有限公司,北京100045

出　　处：《建筑结构学报》2019年第6期125-132,共8页Journal of Building Structures

基　　金：北京市自然科学基金项目(8152008)

摘　　要：按现行抗震规范设计的底部空框架填充墙钢筋混凝土框架结构,可能无法实现"强柱弱梁"的预期延性破坏机制。为此,建立了填充墙与主体框架协同作用的等效斜撑-框架模型,改进等效单自由度体系阻尼比与刚度的确定方法,提出了填充墙钢筋混凝土框架结构基于位移的抗震设计方法;针对底部为空框架的填充墙钢筋混凝土框架结构进行不同性能目标下的静力推覆分析,实现其"使用良好"、"修复后使用"和"防止倒塌"性能水平的抗震设计。采用动力弹塑性时程分析方法和能力谱法验证了基于位移的改进抗震设计方法的有效性。分析表明,应用基于位移的改进抗震设计方法,可综合考虑填充墙对主体框架的利弊作用,实现结构性能抗震设计目标。According to the current seismic design code,it is possible not to obtain the expected failure mechanism of"strong column and weak beam"for reinforced concrete (RC) frame structures without infill walls at the bottom. The equivalent diagonal bracing-frame model was established to consider the interaction between the infill wall and frame members. Calculation of equivalent damping ratio and the equivalent stiffness were improved for an equivalent singledegree-of-freedom system. The displacement-based seismic design method was presented for RC frame structures with infill wall. Aiming at different performance levels for a five story RC frame structure without infill walls at the bottom,displacement-based seismic performance design were carried out in order to satisfy the performance levels of serviceability,life-safety,and collapse prevention by means of structural pushover analysis. Furthermore it is proved that this method is feasible by means of both capacity spectrum method and dynamic elasto-plastic time history analysis method. Therefore it can be shown that performance-based seismic design can be achieved by taking both advantages and disadvantages of infill walls to the frame members into account by means of the advanced displacement-based seismic design method.

关 键 词：RC框架 填充墙 等效斜撑模型 基于位移 性能抗震设计 

分 类 号：TU375.4[建筑科学—结构工程] TU311.3