带楼板薄壁钢管混凝土组合节点低周反复荷载试验研究  

Experimental study on composite CFTST joints with concrete slab under low cyclic loadings

作　　者：王静峰[1] 胡益磊 蒋志[2] 

机构地区：[1]合肥工业大学安徽土木工程结构和材料省级重点实验室,安徽合肥230009 [2]合肥工业大学土木与水利工程学院,安徽合肥230009

出　　处：《建筑结构学报》2013年第S1期73-79,共7页Journal of Building Structures

基　　金：国家自然科学基金项目(51178156;50808062);教育部新世纪优秀人才支持计划项目(NCET-12-0838);教育部博士点基金项目(200803591022)

摘　　要：为了研究地震作用下薄壁钢管混凝土组合框架节点的抗震性能和破坏特征,进行了足尺冷弯薄壁钢管混凝土柱与钢-混凝土组合梁单边螺栓端板连接节点试件的循环往复荷载试验。观察了试件受力全过程和破坏模式,分析了组合节点的滞回曲线、承载力和刚度退化、耗能能力等抗震性能指标,应用现有规范讨论了组合节点的刚性和延性。试验结果表明,冷弯薄壁钢管混凝土柱与钢-混凝土组合梁单边螺栓端板连接节点为半刚性连接节点;此类组合节点具有良好的延性和耗能能力、连接构造安全可靠;位移延性系数μΔ取值范围为1.38~1.84,满足现有抗震设计要求,可以在多层组合框架结构中应用。To study the seismic performance and failure mechanism of the endplate joints for concrete-filled thin-walled steel tubular(CFTST) frames,a series of experiments on full-scale specimens of the blind bolted endplate composite joints between CFTST columns and steel-concrete composite beams under low cyclic loading were conducted.The whole test process of all specimens and the failure modes were investigated.Hysteretic curves,degradation regulation of bearing capacity and stiffness,and energy dissipation were also carefully observed.Rigidity and ductility of the composite joints were discussed according to present specifications.The test results show that the endplate joints between CFTST columns and steel-concrete composite beams behave semi-rigid.The novel joints exhibit good ductility and energy dissipation capacity,reliable and safety connecting performance.Displacement ductility coefficient μΔ is between 1.38 and 1.84 and satisfies the seismic design requirement.The proposed composite joint type can be used in multi-layer composite structures.

关 键 词：薄壁钢管混凝土柱 组合节点 端板连接 拟静力试验 受力性能 

分 类 号：TU398.9[建筑科学—结构工程]