双钢板混凝土组合剪力墙斜截面承载力计算方法

发布时间：2018-04-17 04:11

本文选题：双钢板混凝土组合剪力墙 + 斜截面承载力　；参考：《建筑结构学报》2015年06期

【摘要】：分析24片以剪切破坏为主的双钢板混凝土组合剪力墙的低周反复加载试验结果表明,剪切破坏以腹部混凝土斜压杆压碎或表面钢板拉断为破坏特征,无轴压力作用时,墙体腹部混凝土形成45°交叉斜裂缝,表面钢板发生45°剪切屈曲;轴压力可提高墙体的斜截面承载力;当剪跨比小于0.85时,随剪跨比减小,墙体受剪承载力增大,当剪跨比大于0.85时,剪跨比的变化对墙体受剪承载力影响不大。在此基础上,提出了该类组合剪力墙斜截面承载力计算的交叉斜杆模型,即当墙体达到极限状态时,钢板可视为45°分布式斜拉杆,混凝土可视为45°分布式斜压杆,拉压杆相互垂直。进而推导了组合剪力墙斜截面承载力的计算公式,并通过拟合试验结果,考虑轴压力对组合剪力墙斜截面承载力的影响。公式计算结果与试验结果吻合良好。
[Abstract]:The low cycle repeated loading test results of 24 double steel concrete composite shear walls with shear failure are analyzed. The results show that the shear failure is characterized by the crushing of oblique concrete bar or the surface steel plate breaking, and when there is no axial pressure, the failure characteristics of the shear failure are as follows.When the shear span ratio is less than 0.85, the shear capacity of the wall increases with the decrease of the shear span ratio, and the shear bearing capacity of the wall increases with the decrease of the shear span ratio.When the shear span ratio is greater than 0.85, the variation of the shear span ratio has little effect on the shear bearing capacity of the wall.On the basis of this, a cross skew bar model for calculating the bearing capacity of inclined section of composite shear wall is proposed. When the wall reaches the limit state, the steel plate can be regarded as 45 掳distributed inclined rod, and the concrete can be regarded as 45 掳distributed inclined bar.The tension bar is perpendicular to each other.Furthermore, the formula for calculating the bearing capacity of inclined section of composite shear wall is derived, and the influence of axial pressure on the bearing capacity of inclined section of composite shear wall is considered by fitting the experimental results.The results of the formula are in good agreement with the experimental results.
【作者单位】：北京航空航天大学交通科学与工程学院;广东省建筑设计研究院;
【基金】：北京市自然科学基金项目(8142026)
【分类号】：TU398.9

【参考文献】