Recycled steel wire is taken from used tires, and by procedures like mechanical cutting and friction treatment, it can be converted into industrial recycled steel fiber that meets precise criteria. Such green fiber may effectively limit the growth of fractures in concrete and diffuse the fracture energy of concrete when incorporated into concrete. An investigation of the effects of materials and horizontal reinforcement spacing on the seismic performance of shear wall specimens is presented in this research. The test and numerical simulation findings indicate that the RSFRC (recycled steel fiber reinforced concrete) shear wall's fracture is substantially narrower than that of a conventional shear wall and that the shear carrying capacity and deformation ductility of the shear wall have been greatly enhanced. The energy dissipation capacity of the RSFRC shear wall specimen with varying horizontal reinforcement spacing is significantly enhanced when compared to the conventional shear wall, and the ultimate displacements are reduced. RSFRC shear wall specimen has higher stiffness in the early stage, and the overall stiffness decreases slowly. With the decrease of fiber volume fraction of RSFRC shear wall in a certain range, the shear bearing capacity and stiffness of the model will decrease slightly, but the ductility will increase significantly. Compared with the RSFRC shear wall with fiber aspect ratio of 40 and 25, the bearing capacity and ductility of the two are close, but the RSFRC shear wall with low aspect ratio is slightly insufficient. When the axial compression ratio is in the range of 0.2–0.4, the horizontal shear capacity of RSFRC shear wall increases with the increase of vertical load, but the maximum horizontal displacement becomes smaller, and the model is damaged by compression. Using theoretical calculation, this work also creates the simplified calculation method and restoring force model for the bearing capacity of the diagonal section of RSFRC shear wall. The observed findings correspond well with the test hysteresis curve and may serve as a benchmark for future study. This study provides a new research direction for the seismic performance of RSFRC structures, as well as a solid theoretical foundation and promotion for future research.

中文翻译：

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再生钢纤维混凝土剪力墙抗震性能试验及计算方法研究

再生钢丝取自废旧轮胎，经过机械切割、摩擦处理等工序，可转化为符合精确标准的工业再生钢纤维。当这种绿色纤维掺入混凝土中时，可以有效地限制混凝土中裂缝的扩展并扩散混凝土的断裂能。本研究调查了材料和水平钢筋间距对剪力墙试件抗震性能的影响。试验和数值模拟结果表明，RSFRC（再生钢纤维混凝土）剪力墙的断口明显比传统剪力墙窄，剪力墙的受剪承载能力和变形延性得到了极大的提高。与传统剪力墙相比，不同水平钢筋间距的RSFRC剪力墙试件的耗能能力显着增强，极限位移减小。RSFRC剪力墙试件早期刚度较高，整体刚度下降缓慢。随着RSFRC剪力墙纤维体积分数在一定范围内的减小，模型的抗剪承载力和刚度会略有下降，但延性会显着增加。与纤维长径比为40和25的RSFRC剪力墙相比，两者的承载力和延性接近，但低长径比的RSFRC剪力墙略显不足。当轴压比在0.2~0.4范围内时，RSFRC剪力墙的水平抗剪承载力随着竖向荷载的增大而增大，但最大水平位移变小，模型受到压缩破坏。通过理论计算，本文还建立了RSFRC剪力墙斜截面承载力的简化计算方法和恢复力模型。观察到的结果与测试滞后曲线很好地吻合，可以作为未来研究的基准。该研究为RSFRC结构抗震性能提供了新的研究方向，也为今后的研究奠定了坚实的理论基础和促进作用。