自复位平面钢框架推覆分析  

Pushover Analysis of Self-centering Steel Moment-resisting Plane Frame

作　　者：张艳霞[1,2] 叶吉健[1] 赵微[1] 李瑞[1] 刘学春[2] 

机构地区：[1]北京建筑大学工程结构与新材料北京高等学校工程研究中心,北京100044 [2]北京工业大学建筑工程学院,北京100124

出　　处：《地震研究》2014年第3期476-483,490,共8页Journal of Seismological Research

基　　金：国家自然科学基金(51278027);国家自然科学基金重点(51038006);城市地下空间开发利用中的基础理论和关键技术研究创新团队(PMX2013_014210_00016)联合资助

摘　　要：运用ABAQUS有限元软件对一榀四层两跨平面钢框架进行静力弹塑性分析,分别计算钢材强度为Q345、Q420和Q460三榀自复位钢框架,探讨自复位平面钢框架的抗震性能,并着重讨论钢材强度对自复位性能的影响。结果表明,钢材强度的提高对减小结构塑性、残余侧移有较明显的作用,但未彻底避免柱底塑性的产生。对相对内转角和摩擦耗能也有一定影响,但是对钢绞线预应力影响不大。The static elastic-plastic analysis of a four-story two-bay Self-centering Steel Moment-resisting Plane Frame （SC-MRFs） are conducted by FEA software ABAQUS,and three SC-MRFs with different steel strength of Q345,Q420 and Q460 are calculated.The seismic performance of SC-MRFs and the effect of steel strength on self-centering capability are discussed.The results indicate that the increment of steel strength has an obvious effect on decrement of structural plasticity and residual drift,but it can＇t completely avoid the plasticity of column bottom.Besides,it also affects connection relative rotation to some degree and friction energy dissipation,but has little influence on the loss of prestressing steel strand.

关 键 词：自复位平面钢框架 钢结构 平面框架 静力弹塑性 高强钢 

分 类 号：TV352[水利工程—水工结构工程]