竖向分布钢筋不连续的装配式剪力墙等强设计方法

为解决装配式剪力墙灌浆套筒构造施工难、存在安全风险的问题，提出一种竖向分布钢筋不连续并加粗两侧现浇区纵筋直径的装配式剪力墙体系。提出了该剪力墙的承载力计算式，并建立了30个有限元分析模型对其进行检验，结果表明，采用正截面承载力设计值对承载力的估计较为准确，且初始刚度与现浇剪力墙一致。为便于实际工程设计，提出了间接设计方法，即将现浇剪力墙按压弯等强和抗剪等强的配筋原则等效为装配式剪力墙，设计过程中，所有标准层剪力均按底层标准层进行等效配筋。通过对间接设计方法合理性分析，发现虽然按照“偏心受压等强替换”原则配筋的装配式剪力墙在低轴压比条件下承载力低于现浇剪力墙，但由于层间剪力较低，结构仍满足安全性要求。

Equal-strength design method of precast shear wall with discontinuous vertical distributing reinforcements

In order to address the construction difficulties and safety risk of grouting sleeve in precast shear walls, a kind of precast shear wall system with discontinuous vertical distributing reinforcements and enlarged longitudinal reinforcement diameter in the cast-in-place area on both sides was proposed. The bearing capacity formula of the precast shear wall was proposed and 30 parametric finite element models were established to test the formula. The results show that the design value of normal section bearing capacity is relatively accurate in estimating the bearing capacity, and the initial stiffness is consistent with that of the cast-in-place wall. In order to facilitate practical design, an indirect design method was proposed. The cast-in-place wall is equivalent to the assembled wall according to the principle of equal-strength under compression-bending and shear loadings. In the design process, all the standard layers can be redesigned with equivalent reinforcement based on the bottom standard layer. The rationality of the indirect design method was analyzed. It is found that the bearing capacity of the assembled wall designed by equal strength replacement under eccentric compression is lower than that of the cast-in-place wall when it is under a low axial compression ratio, but the indirect design method can satisfy the structural safety requirements because of the relatively low shear force.