钢筋混凝土剪力墙基于位移的变形能力设计方法

Displacement-based deformation capacity design method of RC cantilever walls

为了研究钢筋混凝土(RC)剪力墙的变形能力,建立了RC剪力墙屈服位移角和极限位移角的计算式。通过对106个试件的试验数据拟合分析,得到了计算式的相关参数,给出了RC剪力墙变形能力的计算方法。分析表明,RC剪力墙的屈服位移角与受拉钢筋屈服强度、剪跨比有关;RC剪力墙的极限位移角与配箍特征值、剪跨比和相对受压区高度等有关。在此基础上,提出了RC剪力墙基于位移的变形能力设计方法,得到了RC剪力墙在不同位移角要求下配箍特征值的计算公式。

The deformation capacity of reinforced concrete （RC） cantilever wall was analyzed using models to predict its drift at yield and at ultimate. Test results from 106 specimens were used for a regression analysis of the drift ratios of RC walls. The analysis shows that the drift ratio of RC walls at yield is related to the yield strength of the longitudinal bars and the shear-span ratio, and that the drift ratio of RC walls at ultimate is related to the stirrup characteristic value, the shear-span ratio, and the relative compression depth. A displacement-based deformation capacity design method was then developed for RC cantilever walls, with an expression for the stirrup characteristic value for a specified drift demand.