1673-159X

CN 51-1686/N

附加金属阻尼的装配式双面叠合剪力墙抗震性能研究

Seismic Performance of Prefabricated Concrete Superposed Shear Walls with Supplemental Metallic Damping

  • 摘要: 为提升叠合剪力墙的整体抗震性能,提出在叠合剪力墙墙角附加金属阻尼的改进方法。该方法通过引入金属阻尼连接板和“墙趾钢靴”,从而不用使用现浇边缘构件,减少了水平接缝处的插筋面积,增强了叠合剪力墙的耗能能力、自复位能力和装配性能。为评估该新型叠合剪力墙的抗震性能,首先通过试验数据验证有限元模拟方法的可靠性,继而对3组共12片试件进行低周往复加载模拟,分析剪力墙的弹塑性变形、损伤发展规律、滞回性能和抗震性能指标,研究轴压比、插筋配置、金属阻尼材料等因素对剪力墙抗震性能的影响。研究结果表明:改进后的剪力墙在抗震性能方面表现优异,特别是在变形能力和耗能能力上,实现了墙体“受控摇摆”和水平接缝集中变形耗能的设计目标;适度减少水平接缝插筋并弱化水平连接强度,有利于提高剪力墙的自复位能力。在工程设计中,应避免剪力墙处于高轴压状态,建议选用Q235或Q345低碳钢作为附加金属阻尼材料。

     

    Abstract: To enhance the overall seismic performance of composite shear walls, an improved method of adding metal damping at the corners of composite shear walls is proposed. This method introduces metal damping connection plates and "wall toe steel boots", thus eliminating the need for cast-in-place edge components, reducing the area of insert bars at horizontal joints, and enhancing the energy dissipation capacity, self-resetting capacity and assembly performance of composite shear walls.To evaluate the seismic performance of the new type of composite shear wall, this paper first verified the reliability of the finite element simulation method through test data, and then conducted low-cycle reciprocating loading simulations on a total of 12 specimens in 3 groups.The research investigated the effects of axial load ratio, inserted steel bar configuration, and metallic damping materials on structural behavior. Results show that the improved shear walls demonstrate excellent seismic performance, particularly in deformation and energy dissipation capabilities, achieving "controlled rocking" and concentrated energy dissipation at horizontal joints. The study found that moderately reducing horizontal joint reinforcement improves self-centering ability. Design recommendations include avoiding high axial load states and using Q235 or Q345 low-carbon steel as damping material.

     

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