屈曲约束支撑半刚性连接框架弹塑性地震位移简化计算  

A simplified method for determining elasto-plastic drift of buckling restrained braced frame with semi-rigid connections

作　　者：李国强[1] 胡大柱[1] 孙飞飞[1] 郝坤超[2] 

机构地区：[1]同济大学,上海200092 [2]中国京冶工程技术有限公司,上海201206

出　　处：《地震工程与工程振动》2009年第4期33-40,共8页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金创新群体项目(50621062);国家科技支撑计划项目(2006BAJ01B02)

摘　　要：研究屈曲约束支撑半刚性连接框架弹塑性位移计算方法,为这种结构抗震设计提供依据。推导了屈曲约束支撑半刚性连接框架结构侧移刚度计算方法,通过计算屈曲约束支撑和半刚性连接在罕遇地震作用下的有效阻尼比,修正弹性设计反应谱,再利用修正后的设计反应谱进行结构弹塑性层间位移简化计算。通过与弹塑性时程分析对提出的计算方法进行验证。基于有效阻尼比的思想给出的弹塑性位移的简化计算方法可进行屈曲约束支撑半刚性连接框架罕遇地震下的抗震设计。A simplified method for determining the elatso-plastic drift of buckling restrained braced frame with semi-rigid connections was developed. The lateral stiffness of the structure is presented. Based on the characteristic of the semi-rigidly connected steel frame and the principle of effective damping ratio, the simplified calculation method for solving the elasto-plastic drift of the buckling restrained braced frame with semi-rigid connections was devised. The comparison between the results of simplified calculation method and the mean results of ten seismic ground motions elasto-plastic time-history analysis was made. The results show that the simplified calculation method is an exact and valid method. The method can be used in aseismic design of buckling restrained braced frame with semi - rigid connections.

关 键 词：半刚性连接 屈曲约束支撑 阻尼比 弹塑性位移 

分 类 号：P315.96[天文地球—地震学] TU311.3[天文地球—固体地球物理学]