对角槽钢加劲钢板剪力墙抗震性能试验研究

EXPERIMENTAL STUDY ON SEISMIC BEHAVIOR OF STEEL PLATE SHEAR WALLS WITH DIAGONAL CHANNEL STIFFENERS

为研究大跨高比的对角槽钢加劲钢板墙结构,该文对3个1/3缩尺的钢板剪力墙试件进行了拟静力试验研究,包括一个拼接式钢板剪力墙和2个拼接式-对角槽钢加劲钢板剪力墙。试验结果表明钢板剪力墙有良好的耗能能力,对角加劲钢板墙滞回曲线饱满呈梭形。槽钢的两个翼缘与钢板连接,形成具有更大抗扭刚度闭口截面,在加载过程中避免了加劲肋的扭转而导致加劲效果降低。对角布置的槽钢加劲肋具有较大的抗弯刚度,在弹性阶段提高钢板的弹性屈曲荷载,限制钢板平面外变形;在弹塑性阶段能起到增大拉力带的作用,提高结构承载力。推导了框架柱的剪力、轴力和弯矩计算公式,结果表明对角槽钢加劲形式对边缘构件的附加轴力和剪力作用较大,因此在设计时应考虑加劲肋的支撑作用。

In order to study the diagonal channel stiffened steel plate shear wall(SPSW) with a large span-toheight ratio, three 1/3-scaled SPSW specimens were tested under cyclic quasi-static loading. One of the specimens was spliced SPSW without diagonal channel stiffeners and the other two were spliced SPSWs with diagonal channel stiffeners. The experimental results show that SPSWs have good energy dissipation capacities, and the hysteretic curves of the diagonally stiffened SPSWs are plump spindle-shaped. The closed section formed by the channel stiffener and the plate avoids the torsion of the stiffener during the loading process. Channel stiffeners can increase the elastic buckling load and limit the out-of-plane deformation of the infill plate in the elastic stage.Moreover, diagonal stiffeners improve the bearing capacity of the specimen in elastoplastic stage. The formulas for calculating the shear force, axial force and bending moment of the frame column are derived. The results show that the axial force and shear force of the columns are greatly affected by the diagonal channel stiffeners, thus the supporting effect of the stiffener should be considered in the design.