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通过1个钢筋混凝土剪力墙试件和5个横向孔洞为矩形的预制混凝土空心模剪力墙试件的拟静力试验,研究了采用纵向孔洞为圆形、横向孔洞为矩形的空心模构造的预制混凝土空心模剪力墙试件的受力性能。结果表明:该预制混凝土空心模剪力墙沿竖向分布钢筋位置出现竖向裂缝,避免了脆性破坏发生,位移延性系数为3.87~6.47,变形性能良好;现浇与预制混凝土结合面是墙体受力的薄弱部位,降低了墙体的受剪承载力,对高轴压比试件尤为显著;空心模剪力墙在正常使用阶段的刚度与现浇混凝土剪力墙相似,在设计计算时无需对刚度进行折减;提高轴压比和减小剪跨比能够增加墙体的初始刚度,但加快了后期刚度退化速率;降低水平钢筋配筋量对墙体的受剪承载力和变形能力影响较小,但降低了开裂荷载,增加了裂缝宽度。
Through the pseudo-static test of one RC shear wall specimen and five rectangular RC prestressed concrete hollow shear wall specimens, the hollow die structure with longitudinal holes and rectangular holes was designed. The Mechanical Properties of Precast Concrete Hollow - die Shear Walls. The results show that vertical cracks occur along the vertical distribution of reinforced concrete shear walls, which can avoid the occurrence of brittle failure. The displacement ductility coefficient is 3.87 ~ 6.47 and the deformation performance is good. The combination of cast-in-place and precast concrete is the wall The weak part of the force reduces the shear capacity of the wall, especially for high axial compression ratio specimens; the rigidity of the hollow-walled shear wall during normal use is similar to the cast-in-place concrete shear wall, Reduce the stiffness; increase the axial compression ratio and reduce the shear-span ratio can increase the initial stiffness of the wall, but accelerated the late stiffness degradation rate; reduce the level of steel reinforcement on the wall shear capacity and deformation capacity Smaller, but lower the cracking load and increase the crack width.