考虑楼板组合作用的方钢管混凝土组合框架受力性能试验研究

为研究钢梁与混凝土楼板的组合作用对钢-混凝土组合框架体系的刚度、承载力及耗能能力的影响，并考察组合框架结构在大震作用下进入弹塑性阶段的受力性能，进行了2榀足尺方钢管混凝土组合框架的低周反复荷载试验。2榀组合框架分别为组合梁-钢管混凝土框架及纯钢梁-钢管混凝土框架。试验中结构的最大层间位移角达到1/21。试验结果表明：组合框架结构具有稳定的滞回性能及良好的延性；钢梁与混凝土楼板的组合作用能显著提高结构的刚度、强度及耗能能力，并且能有效保证钢梁上翼缘的局部稳定性及钢梁的整体稳定性；楼板组合作用将使钢梁下翼缘应变显著增大，导致楼盖梁转动能力的减小；两个试件的破坏均是由梁端失效引起，说明试验中采用的梁翼缘贯通式节点能够满足强柱弱梁、强节点弱构件的抗震设计要求。

Experimental study on load-bearing behavior of rectangular CFST frame considering composite action of floor slab

In order to investigate the effects of composite action on the stiffness,strength and energy dissipating capacity of steel-concrete composite frame,and examine the elasto-plastic behavior of composite frame system under rare seismic load,two full-scale rectangular CFST composite frames with and without composite floor slab were tested under cyclic loading to a maximum inter storey drift angle of 1/21 rad.The experimental results indicate that the composite frames exhibit steady hysteretic behavior and excel...