预制混凝土空心模剪力墙受力性能试验研究

发布时间：2018-06-07 03:24

本文选题：混凝土剪力墙 + 空心模　；参考：《建筑结构学报》2017年12期

【摘要】：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。
[Abstract]:Based on the quasi-static test of one reinforced concrete shear wall specimen and five rectangular precast concrete hollow shear wall specimens with transverse holes, the circular longitudinal holes are studied. Mechanical behavior of prefabricated concrete hollow shear wall with rectangular hollow cavity. The results show that the precast concrete hollow shear wall has a vertical crack along the vertical distribution of steel bar, avoiding brittle failure, and the displacement ductility coefficient is 3.87 ~ 6.47, and the deformation performance is good. The cast-in-place and precast concrete interface is the weak part of the wall, which reduces the shear capacity of the wall, especially for the specimen with high axial compression ratio, and the stiffness of the hollow formwork shear wall is similar to that of the cast-in-place concrete shear wall in normal service. The initial stiffness of the wall can be increased by increasing the axial compression ratio and reducing the shear span ratio, but the rate of stiffness degradation in the later stage can be accelerated by increasing the axial compression ratio and reducing the shear span ratio. Reducing the amount of horizontal reinforcement has little effect on the shear capacity and deformation capacity of the wall, but reduces the cracking load and increases the crack width.
【作者单位】：北京建筑大学北京未来城市设计高精尖创新中心;烟台大学土木工程学院;清华大学建筑设计研究院;
【基金】：国家自然科学基金项目(51508490,51378450)
【分类号】：TU398.2

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