摘要
为实现结构刚度可在一定范围内渐变,同时充分发挥组合钢板的性能,介绍一种新型高层抗震加固结构体系—组合深梁。通过在水平低周反复荷载下,2个组合深梁填充钢框架结构模型试验,得到内填组合深梁钢框架结构的滞回曲线。试验过程中,混凝土板限制了钢板失稳变形,钢板塑性得以发展;组合深梁最后耗能破坏,随后钢框架发生破坏。试验结果显示:组合深梁主要由钢板部分来承担水平剪力和弯矩,混凝土板并不承担水平荷载;试件的滞回曲线饱满且骨架曲线有明显的塑性流动阶段,试件的延性和耗能能力较好,证明内填组合深梁钢框架结构抗震性能良好。最后,利用得到的试验数据进行回归分析,建立该结构恢复力模型,可用于组合深梁结构的弹塑性反应分析。
To realize the modulation of structural stiffness in a certain range and to exploit the performance of composite steel plate,a new anti-seismic reinforcing structure-composite deep beam is introduced.The cyclic loading model tests of two composite deep beam infilled steel frames were carried out,the hysteresis loops of the infilled steel frames are obtained.During the experiment,the concrete plate restrictes the deformation of steel plate,the plasticity of steel plate is developed;the composite deep beam is failed first,then the steel frame is failed.The results are demonstrated that the steel plate of composite deep beam mainly sustains horizontal shear force and moment.The hysteresis loops are plump,and the skeleton curve has an apparent stage of plastic flow.The good ductility and the energy dissipation capacity of the tested models prove the fine anti-seismic behavior of the deep beam infilled steel frames.Regression analysis based on the test data,and restoring force model can apply to elastoplastic response analysis of the composite deep beam structures.
出处
《世界地震工程》
CSCD
北大核心
2010年第3期80-84,共5页
World Earthquake Engineering
基金
国家自然科学基金项目(50678025)
陕西省外国专家局择优项目(SLZ2008008)
关键词
组合深梁
钢框架
恢复力模型
composite deep beam
steel frame
restoring force model
