带楼板双槽钢组合截面构件抗震性能试验研究

为研究带钢筋混凝土(RC)楼板双槽钢组合截面构件的抗震性能,对4个带RC楼板试件进行了常轴力和往复弯曲共同作用下的拟静力试验,分析了填板间距、有无加劲肋和腹板高厚比等参数对试件抗震性能的影响.结果 表明:各试件的滞回曲线较为饱满,具有良好的耗能能力和延性;减小填板间距,对试件的承载力和刚度影响较小,但提高了试件的延性和耗能能力;试件SJ3的峰值荷载和初始刚度比试件SJ1的分别提高了28.42％和22.70％,说明在试件的塑性铰区设置加劲肋可提高其承载力和刚度;试件SJ4的峰值荷载、延性系数、初始刚度和累计耗能量比试件SJ1的分别提高了33.88％、20.70％、27.40％和12.84％,说明减小腹板高厚比,可显著改善试件的抗震性能.

Experimental Study on Seismic Behavior of SteelDouble-channel Build-up Members with Slabs

To investigate the seismic behaviour of the steel double-channel build-up member with reinforcedconcrete (RC) slab, quasi-static tests on four specimens with RC slabs were carried out under constant axially com?pressive load and reversed cyclic bending. The effect of the stitch spacing, the stiffener in plastic hinge region andthe web depth-thickness ratio on seismic behavior of the testing specimens was studied. The experimental results in?dicate that all hysteresis curves are stable, showing excellent energy dissipation capacity and ductility. With the de?creasing stitch spacing, the strength and stiffness of specimens change insignificantly, but the ductility and energydissipation capacity can be improved. The peak bearing capacity and initial stiffness of Specimen SJ3 are 28.42%and 22.70% higher than that of Specimen SJ1, respectively, indicating that the strength and stiffness of specimenscan be improved by setting stiffeners in the plastic hinge region. The peak bearing capacity, ductility coefficient, initial stiffness and cumulative energy dissipation of Specimen SJ4 are 33.88%, 20.70%, 27.40% and 12.84% higherthan those of Specimen SJ1, respectively, indicating that the seismic performance of specimens can be significantlyimproved by reducing the web depth-thickness ratio.