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已有研究在组合钢板墙的混凝土板与边缘构件之间留出缝隙,以避免混凝土板分担面内水平力,但却使缝隙处的钢墙板因失去混凝土板的约束而成为薄弱部位。为此提出在钢板上开圆孔的措施,将薄弱部位移至混凝土板约束区域以内。一个四层单跨1/4缩尺比例的开圆孔组合钢板墙结构模型振动台试验结果显示,混凝土板与边缘构件间缝隙处钢板没有发生屈曲,证明了所提措施有效。在组合钢板墙分析模型的基础上,针对开圆孔的组合钢板墙,提出了修正的双向多斜杆模型:将钢板用双向多根斜杆来模拟,斜杆的方向和截面面积根据所开圆孔的几何条件确定,斜杆的受拉承载力根据钢材的屈服强度确定,受压承载力根据组合钢板墙的受剪承载力计算公式确定。利用所提分析模型对振动台试验模型进行了弹塑性时程分析,计算结果与试验结果吻合良好,验证了分析模型的正确性。
It has been studied to leave gaps between concrete slabs and edge members of a composite steel wall to prevent the concrete slabs from sharing the in-plane horizontal force but to make the steel slab at the slats weak due to the constraint of the concrete slab. For this reason, a measure of opening a hole in the steel plate is proposed, and the weak part is moved to the confined area of the concrete slab. A four-story single-span 1/4 scale-scale open-hole composite steel wall structure model shaker test results show that there is no buckling of the steel plate at the gap between the concrete slab and the edge member, which proves that the proposed method is effective. On the basis of the analysis model of the combined steel wall, a modified bidirectional multi-oblique model is proposed for the combined steel wall with the open hole. The steel plate is modeled by two-way multiple oblique rods, and the direction and cross-sectional area of the oblique rod are opened The geometrical conditions of the circular hole are determined. The tension bearing capacity of the slant rod is determined according to the yield strength of the steel. The compressive bearing capacity is determined according to the formula of the shear bearing capacity of the composite steel plate wall. The elasto-plastic time-history analysis of the shaking table test model is carried out by using the proposed analytical model. The calculated results are in good agreement with the experimental results, which proves the correctness of the analytical model.