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为了提高高强混凝土剪力墙的侧向变形能力,通常在剪力墙截面两端设置约束边缘构件。根据15个设置约束边缘构件高强混凝土剪力墙弯曲(弯曲剪切)破坏的试验结果,以开裂点、屈服点、峰值点和极限点将这种剪力墙截面的弯矩-曲率骨架曲线简化为4线型;基于平截面假定,分别推导了开裂、屈服、峰值以及极限点的弯矩和曲率表达式,同时考虑了边缘约束构件对峰值、极限点的弯矩-曲率的影响。分析结果表明,弯矩-曲率的计算值均与试验值吻合较好。
In order to improve the lateral deformability of high-strength concrete shear walls, constrained edge members are usually provided at both ends of the shear wall cross-section. According to the experimental results of bending (bending shear) failure of 15 high-strength concrete shear walls with bounding members, the bending moment-curvature skeleton curve of such shear wall section is simplified by the crack point, yield point, peak point and limit point Which is 4-line type. Based on the assumption of flat section, the formulas of bending moment and curvature of crack, yield point, peak value and limit point are respectively deduced. Meanwhile, the influence of edge constraint on the moment and curvature of peak and limit point is considered. The analysis results show that the calculated values of bending moment and curvature agree well with the experimental values.