高强钢组合Y形偏心支撑钢框架静力性能  

Static performance of high-strength steel composite Y-shaped eccentrically braced steel frames

作　　者：王泽 李腾飞 苏明周[1] WANG Ze;LI Tengfei;SU Mingzhou(School of Civil Engineering,Xi’an University of Architecture and Technology,Xi’an 710055,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055 [2]清华大学土木工程系,北京100084

出　　处：《地震工程与工程振动》2024年第6期93-101,共9页Earthquake Engineering and Engineering Dynamics

基　　金：国家自然科学基金项目(51178382);中国博士后科学基金项目(2022M723005)。

摘　　要：为研究高强钢组合Y形偏心支撑钢框架在水平荷载作用下的承载能力、抗侧刚度、延性和破坏模式,对一个1/2缩尺的3层结构试件进行了静力推覆试验,试验采用三质点倒三角比例加载,并采用OpenSees软件建立了相应的数值模型进行模拟。研究结果表明:试件在水平荷载作用下,随着顶点位移的逐渐增大,耗能梁段开始屈服,结构的刚度逐渐降低;试验过程中,结构2层的耗能梁段塑性变形最为明显,层间位移最大,层间侧移角达到了0.0433 rad;结构在最终破坏时,表现为框架梁与耗能梁段连接处节点的破坏,框架梁柱仍处于弹性状态;OpenSees建模时耗能梁段与框架梁连接处采用刚性连接加刚性段的方式,该建模方法得到的推覆曲线模拟结果与试验结果吻合较好,表明数值模型可用于整体结构的抗震性能模拟分析;参数分析结果表明,剪切屈服型耗能梁段抗侧刚度和承载力均优于弯剪屈服型耗能梁段。To study the bearing capacity,lateral stiffness,ductility,and failure mode of high-strength steel composite Y-shaped eccentrically braced steel frames under horizontal loads,pushover tests were conducted on a half-scale three-story specimen.The test adopted three-mass inverted triangle proportional loading,and used OpenSees software to establish a corresponding numerical model for simulation.The results show that under the action of horizontal load,the link begins to yield,and the stiffness of the structure gradually decreases as the load gradually increases.During the test,the plasticity of the link on the second floor of the structure is the most obvious,the inter-story drift is the largest,and the inter-story drift ratio reaches 0.0433 rad.When the structure is finally damaged,it is manifested as the failure of the joints between frame beam and link,and the frame beams and columns are still in an elastic state.When modeling in OpenSees,the connection between the link and the frame beam is adopted using the method of rigid link and rigid section.The pushover curve simulation results obtained by this modeling method are in good agreement with the test results,indicating that the numerical model can be used for the simulation analysis of the seismic performance of the global structure.The parametric analysis results show that the lateral stiffness and bearing capacity of the shear link are better than those of the shear-flexural link.

关 键 词：Y形偏心支撑钢框架 高强钢 静力推覆试验 OPENSEES 刚性连接 

分 类 号：TU391[建筑科学—结构工程]