旋转放大型摩擦自复位支撑性能试验及恢复力模型验证

王德斌1,张昕岳1,付兴2,王文明3,刘璐4

振动与冲击 ›› 2024, Vol. 43 ›› Issue (9) : 8-17.

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PDF(2966 KB)
振动与冲击 ›› 2024, Vol. 43 ›› Issue (9) : 8-17.
论文

旋转放大型摩擦自复位支撑性能试验及恢复力模型验证

  • 王德斌1,张昕岳1,付兴2,王文明3,刘璐4
作者信息 +

Performance tests of rotating-amplification type friction self-centering brace and its restoring force model verification

  • WANG Debin1, ZHANG Xinyue1, FU Xing2, WANG Wenming3, LIU Lu4
Author information +
文章历史 +

摘要

为解决传统自复位支撑耗能能力不足而位移放大阻尼器缺少复位能力的问题,基于桥式放大工作机理提出了一种具有位移放大功能的摩擦自复位支撑(self-centering brace with displacement amplification function,SC-DAFB)。介绍了其基本构造、工作机理,阐述了支撑耗能系统的位移及支撑受力放大机理,推导出了支撑各加载阶段的恢复力计算公式,通过对6组不同工况的SC-DAFB进行低周往复加载试验,得到并对比分析了SC-DAFB的承载能力、滞回曲线、耗能性能及残余位移等关键力学性能指标。结果表明:SC-DAFB滞回曲线饱满,具有典型的旗帜型特征,但存在一定程度的非对称特性;减小初始放大角度能够有效提升支撑的承载能力和耗能性能,复位比为1.3时,与无位移放大支撑相比,30°初始放大角度下支撑屈服荷载和最大荷载分别提高47.6%和29.4%,但支撑残余变形略有增加;理论计算与试验得到的支撑滞回曲线对比结果表明,建立的分段式理论恢复力模型与试验结果吻合较好,验证了理论恢复力模型的准确性。

Abstract

A friction self-centering brace with displacement amplification function (SC-DAFB) is proposed to address the insufficient energy dissipation capacity of traditional self-centering braces and the self-centering capacity of displacement amplification dampers. SC-DAFB is based on the working mechanism of bridge amplification and has a basic structure and working mechanism that are explained in detail. The formula for calculating the restoring force of the brace at each loading stage is derived, and the low-cycle reciprocating loading test of 6 groups of SC-DAFB under different working conditions is carried out. The key mechanical properties of SC-DAFB, such as load bearing capacity, hysteresis curve, energy dissipation and residual displacement, are obtained and compared. The results show that reducing the initial amplification Angle can effectively improve the bearing capacity and energy dissipation performance of the brace. When the self-centering ratio is 1.3, the yield load and maximum load of the brace at the initial amplification angle of 30° increase by 47.6% and 29.4%, respectively, compared with the brace without displacement amplification. The theoretical calculation and the experimental results show good agreement, verifying the accuracy of the theoretical restoring force model.

关键词

自复位 / 摩擦耗能 / 位移放大 / 残余变形

Key words

self-centering / friction energy dissipation / displacement amplification / residual deformation

引用本文

导出引用
王德斌1,张昕岳1,付兴2,王文明3,刘璐4. 旋转放大型摩擦自复位支撑性能试验及恢复力模型验证[J]. 振动与冲击, 2024, 43(9): 8-17
WANG Debin1, ZHANG Xinyue1, FU Xing2, WANG Wenming3, LIU Lu4. Performance tests of rotating-amplification type friction self-centering brace and its restoring force model verification[J]. Journal of Vibration and Shock, 2024, 43(9): 8-17

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