Y形偏心支撑-高强钢框架结构抗震性能试验研究

发布时间：2018-03-17 00:08

本文选题：偏心支撑框架　切入点：高强钢　出处：《建筑结构学报》2017年06期 　论文类型：期刊论文

【摘要】：为研究Y形偏心支撑-高强钢框架结构抗震性能,在已完成的1∶2缩尺3层模型结构振动台试验的基础上,重新设计了耗能梁段,并对该结构再次进行振动台试验。试验中选取El Centro波、Taft波和兰州波作为地震动输入并考虑7度多遇到9度罕遇的地震水准,分析了结构在水平地震作用下的动力特性、加速度响应、位移响应、应变响应、剪力分布等,并与已有试验结果进行了对比。通过ABAQUS建立了有限元分析模型,与试验结果进行对比。结果表明:该结构在多遇地震作用下处于弹性状态,在罕遇地震作用下表现为耗能梁段的局部破坏;耗能梁段破坏后,结构刚度大幅下降,但未发生倒塌;在多遇地震和罕遇地震作用下,结构的最大层间位移角满足抗震规范层间位移角限值的相关要求;在罕遇地震作用下,耗能梁段进入塑性状态而进行耗能,其他构件仍保持弹性状态;所建立的有限元模型可以有效模拟振动台试验结果。
[Abstract]:In order to study the seismic behavior of Y-shaped eccentrically braced high-strength steel frame structure, the energy-dissipation beam section was redesigned on the basis of the completed shaking table test of a 3-story model structure with 1: 2 scale. In the experiment, El Centro wave Taft wave and Lanzhou wave are selected as the input of ground motion, and the earthquake level of 9 degrees is considered, and the dynamic characteristics of the structure under horizontal earthquake are analyzed. The acceleration response, displacement response, strain response, shear force distribution and so on are compared with the experimental results. The finite element analysis model is established by ABAQUS. Compared with the experimental results, the results show that the structure is in an elastic state under the action of frequent earthquakes, and appears as the local failure of the energy-dissipated beam section under the rare earthquake, and the stiffness of the structure decreases significantly after the damage of the energy-dissipated beam segment. However, the maximum interstory displacement angle of the structure meets the relevant requirements of the interstory displacement angle limit of the seismic code under the action of frequent and rare earthquakes; under the rare earthquake, the energy dissipation beam section enters the plastic state and consumes energy. Other components remain elastic and the finite element model can effectively simulate the shaking table test results.
【作者单位】：西安建筑科技大学土木工程学院;西安建筑科技大学材料科学与工程博士后流动站;
【基金】：国家自然科学基金项目(51178382,51478380)
【分类号】：TU352.11;TU391

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