建筑结构学报2017，Vol.38Issue(5)：35-42,8.DOI:10.14006/j.jzjgxb.2017.05.005
拉链柱支撑钢框架结构静力推覆试验及数值模拟
Pushover test and numerical analysis of zipper frames
摘要
Abstract
In order to investigate the seismic performance of zipper frames,including the structural bearing capacity,lateral stiffness,failure mode and force transmission of structural members,a pushover test and numerical analysis were carried out on a 3-story and 1:2.6 scaled single-span zipper frame model.The test and numerical analysis results show that,under the lateral displacements corresponding to the frequent and design level earthquake events with intensity 8,the frame model remains in the elastic stage and no buckling is observed on the structural members.Under the lateral displacements corresponding to the rare earthquake event with intensity 8,the structural lateral stiffness is decreased obviously after buckling of the brace members.However,the structural bearing capacity doesn't decrease significantly.With the increase of lateral displacements,the unbalanced vertical force due to buckling of the brace members,is transferred upwards mainly through elongating the zipper struts.Then,the compressive force in the top story braces is increased.When the zipper frame model is unloaded,the zipper struts are subjected to compressive forces,but no buckling is found on these members.In general,the force state and force-transfer path of the structural members are basically in accordance with the design intention and the zipper frames show good seismic performance in the pushover test.关键词
中心支撑钢框架/拉链柱/支撑/静力推覆试验/数值模拟/极限承载能力/抗侧刚度/抗震性能Key words
concentrically braced steel frame/zipper strut/brace/pushover test/numerical analysis/bearing capacity/lateral stiffness/seismic performance分类
建筑与水利引用本文复制引用
于海丰,王鑫,蒋录珍,张文元..拉链柱支撑钢框架结构静力推覆试验及数值模拟[J].建筑结构学报,2017,38(5):35-42,8.基金项目
国家自然科学基金项目(51208169),河北省自然科学基金项目(E2014208115),河北省教育厅项目(QN2016052). （51208169）
