基于高强钢碟簧和复合摩擦材料的自复位消能减震阻尼器受力性能与试验研究

为提高建筑结构抗震韧性，实现震时响应可控，震后易修复的性能目标，提出一种基于高强钢碟簧和复合摩擦材料的自复位消能减震阻尼器，给出一种基本构造方案，分析阻尼器不同阶段的工作原理，理论推导滞回曲线及各阶段刚度、承载力计算公式。通过多次往复加载试验，对碟簧和摩擦片的基本性能，以及多次地震作用下阻尼器的滞回性能和低周疲劳性能进行了考察。试验结果表明，高强钢碟簧性能稳定，复合摩擦材料耗能能力优异；基于两者组合的自复位消能减震阻尼器具有良好的可调节刚度、承载力以及优异的自复位性能；阻尼器滞回耗能稳定，可实现震后功能恢复，低周疲劳性能好。提出的阻尼器工作过程中各阶段刚度及承载力计算公式与试验结果吻合较好，可为工程设计提供参考。

Mechanical behavior and experimental study on high-strength steel disc springs and composite friction material-based self-centering dampers

To improve the seismic resilience of building structures, control the seismic response and ensure post-earthquake repairability, a self-centering energy-absorbing seismic damper based on high-strength steel disc springs and composite friction material was proposed. A basic construction scheme of the damper was presented and the working principles of dampers at different stages were analyzed. A theoretical model was derived for the stiffness and capacity formulas of dampers at various stages. Based on hysteretic loading tests, the fundamental mechanical performance of disc springs and friction plates was investigated. The hysteretic behavior and low-cycle fatigue properties of the damper under multiple earthquake scenarios were investigated. The test results show that the high-strength steel disc spring has stable performance and the composite friction materials show excellent energy dissipation capability. The self-centering seismic dampers with high-strength steel disc spring and composite friction material have good adjustable stiffness and bearing capacity. The dampers have excellent self-centering performance and hysteretic performance, which can achieve rapid recovery after the earthquakes with good low-cycle fatigue behavior. The whole-process theoretical prediction formulas of dampers proposed in this paper agree well with the experimental results and may serve as a reference for engineering design.