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基于“部分增强”的思想,针对剪力墙边缘构件受力复杂、施工困难的特点,提出在高剪力墙边缘构件中采用钢纤维局部增强的方法。结合试验结果,验证了有限元数值分析的适用性,研究了钢纤维体积率和轴压比对钢纤维增强边缘构件混凝土高剪力墙抗侧承载力的影响,并与整体钢纤维混凝土剪力墙相应的抗侧承载力进行对比分析。结果表明:边缘构件钢纤维体积率为1.5%~2%时,对剪力墙承载力增强效果最强,最大提高幅度达45.1%。相对于整体钢纤维混凝土剪力墙,仅边缘构件采用钢纤维增强的剪力墙在未降低过多承载力的情况下,具有较好的经济优势。
Based on the idea of “partial reinforcement ”, aiming at the characteristics of complex force and difficult construction of the edge members of the shear wall, a method of locally reinforcing the steel fibers in the edge members of the high shear wall is proposed. Combined with the experimental results, the applicability of FEM numerical analysis is verified. The influence of steel fiber volume fraction and axial compression ratio on the anti-side bearing capacity of high-strength steel reinforced concrete shear wall with steel fiber reinforced edge members is studied. The corresponding anti-side bearing capacity of the wall is comparatively analyzed. The results show that when the volume fraction of steel fiber in the edge member is 1.5% ~ 2%, the bearing capacity of the shear wall is the strongest, with the maximum increase of 45.1%. Compared with the whole steel fiber reinforced concrete shear wall, only the shear strength of the edge member reinforced by steel fiber has better economic advantages without reducing the excessive bearing capacity.