实腹式型钢混凝土T形柱恢复力模型试验研究  

Experimental Study on the Restoring Force Model of Solid-web Steel Reinforced Concrete T-shaped Column

作　　者：刘祖强[1] 薛建阳[1] 杨青峰[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《实验力学》2017年第6期800-810,共11页Journal of Experimental Mechanics

基　　金：国家自然科学基金项目(51308444);陕西省自然科学基础研究基金(2014JQ7288);陕西省教育厅专项科研计划项目(16JK1464)

摘　　要：为研究实腹式型钢混凝土T形柱的力学性能,完成了5个试件的低周反复加载试验,获得了滞回曲线和骨架曲线,分析了轴压比和配钢率对承载力和变形性能的影响。结果表明:实腹式型钢混凝土T形柱滞回曲线饱满对称,延性好;轴压比增大,承载力变化较小,延性降低;配钢率增大,承载力和延性均提高。基于试验及理论分析,提出了实腹式型钢混凝土T形柱骨架曲线的屈服点、峰值点和破坏点特征值计算方法,进而建立了三折线恢复力模型,研究结果可为该类型结构的弹塑性地震反应分析提供依据。In order to study the mechanical properties of solid-web steel reinforced concrete T-shaped column,low cycle repeated loading experiments were carried out for 5 specimens.Hysteretic curves and skeleton curves were obtained,and the effect of axial compression ratio and shaped steel ratio on bearing capacity and deformation performance was analyzed.Experimental results show that the hysteretic curves of solid-web steel reinforced concrete T-shaped column are plump and symmetrical,and the ductility is good.The ductility of the column decreases with the increase of axial compression ratio,however,the bearing capacity changes insignificantly.With the increase of steel ratio,both bearing capacity and ductility of the column increase.Based on experimental results and theoretical analysis,the calculation method of the characteristic value of the yield point,peak point and failure point at the skeleton curve of solid-web steel reinforced concrete T-shaped column was proposed,and then the trilinear restoring force model was established,which thereby provides a basis for the elastoplastic seismic response analysis of steel reinforced concrete specially-shaped column structure.

关 键 词：型钢混凝土 异形柱 低周反复加载试验 骨架曲线特征点 恢复力模型 

分 类 号：TU398[建筑科学—结构工程]