三边约束钢板的抗剪承载力

Shear Performance of Steel Plate with Trilateral Constrained

利用静力加载方法对4种宽厚比的三边约束钢板单元进行了试验研究,通过试验考察了三边约束钢板的破坏形态和抗剪极限承载力,分析了宽厚比对钢板抗侧性能的影响,试验结果表明:小宽厚比钢板的抗屈曲能力较强,但是对边界约束条件要求较高,易造成边界连接破坏。根据钢板破坏形态,对其抗侧性能进行了理论分析,建立了三边约束钢板的抗侧性能计算模型,给出了三边约束钢板极限抗剪承载力计算公式。文章最后对三边约束钢板的选择和设计提出了建议。

The load carrying test for four steel plate shear walls specimens with various ratio of width-thickness are carried out so as to test the failure mode and the shear strength of steel plate with trilateral constrained,and the lateral stiffness and the buckling mode are investigated in the test.The result indicates that the ratio of width-thickness of steel plate exerts effects on the shear-carrying capacity and failure mode;the buckling of steel plate does not have lateral stiffness.Based on the failure mode of steel plate,the computation model of lateral performance is presented by theoretical analysis.The restraining stiffness of double angle and the buckling-restrained stiffness of steel plate are the important design conditions.Formulae to determine the elastic lateral stiffness and the angle type is proposed,which can be used in the preliminary design of steel plate with trilateral constrained.