Magnetorheological (MR) damper was a kind of smart instrument, and it was very suitable for the semi-active control. In this research, a large-scale MR damper working in the shear mode of the MR fluid was developed to enhance the mechanical properties of the shear wall. The influence of MR damper on the mechanical properties of the shear walls, such as stiffness, strength, ductility, and the energy dissipation capacity, had been researched. Firstly, both the model of MR damper and shear wall were established to optimize the properties of the MR damper and shear wall. Then, three different concrete shear walls were fabricated, which were reinforced by carbon fiber-reinforced polymer (CFRP) bars (W-1), CFRP bars and MR dampers (W-2), and steel strands and MR dampers (W-3), respectively. The mechanical properties of the specimens were experimentally researched and analyzed. The experimental results showed that the ductility, the ability to bear external loads, stiffness, and energy dissipation capacity of the shear walls could be enhanced by the MR damper simultaneously. Compared with W-1, the ductility, the ability to bear external loads, ultimate deformation, and energy-dissipation capacity of W-2 increased by 4.1%, 26.8%, 83.9%, and 35.8%, respectively. The residual deformation of the three shear walls was almost the same. The results indicated that the MR damper could enhance the mechanical properties of the shear walls and had no influence on the self-centering capacity of the shear walls at the same time.

中文翻译：

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高强钢筋磁流变阻尼器加固剪力墙抗震性能试验研究

磁流变（MR）阻尼器是一种智能仪表，非常适合半主动控制。在这项研究中，开发了一种在 MR 流体的剪切模式下工作的大型 MR 阻尼器，以提高剪力墙的机械性能。研究了磁流变阻尼器对剪力墙刚度、强度、延性、耗能能力等力学性能的影响。首先，建立了磁流变阻尼器和剪力墙模型，优化了磁流变阻尼器和剪力墙的性能。然后，制作了三种不同的混凝土剪力墙，分别用碳纤维增强聚合物 (CFRP) 钢筋 (W-1)、CFRP 钢筋和 MR 阻尼器 (W-2) 以及钢绞线和 MR 阻尼器 (W-3) 加固。 ）， 分别。对试件的力学性能进行了实验研究和分析。试验结果表明，磁流变阻尼器可以同时提高剪力墙的延性、承受外载荷的能力、刚度和耗能能力。与W-1相比，W-2的延展性、承受外载荷能力、极限变形和耗能能力分别提高了4.1%、26.8%、83.9%和35.8%。三个剪力墙的残余变形量几乎相同。结果表明，MR阻尼器可以提高剪力墙的力学性能，同时对剪力墙的自定心能力没有影响。MR阻尼器可以同时提高剪力墙的耗能能力。与W-1相比，W-2的延展性、承受外载荷能力、极限变形和耗能能力分别提高了4.1%、26.8%、83.9%和35.8%。三个剪力墙的残余变形量几乎相同。结果表明，MR阻尼器可以提高剪力墙的力学性能，同时对剪力墙的自定心能力没有影响。MR阻尼器可以同时提高剪力墙的耗能能力。与W-1相比，W-2的延展性、承受外载荷能力、极限变形和耗能能力分别提高了4.1%、26.8%、83.9%和35.8%。三个剪力墙的残余变形量几乎相同。结果表明，MR阻尼器可以提高剪力墙的力学性能，同时对剪力墙的自定心能力没有影响。三个剪力墙的残余变形量几乎相同。结果表明，MR阻尼器可以提高剪力墙的力学性能，同时对剪力墙的自定心能力没有影响。三个剪力墙的残余变形量几乎相同。结果表明，MR阻尼器可以提高剪力墙的力学性能，同时对剪力墙的自定心能力没有影响。