摘要
提出一种装配式自复位耗能(ASCED)支撑,该支撑主要由核心杆、外管、摩擦耗能系统和碟簧复位系统组成。对ASCED支撑在低周往复荷载作用下的工作原理及力学性能进行了介绍,基于经典的Bouc-Wen模型建立了ASCED支撑的恢复力模型。设计并加工了一长为1.2m的ASCED支撑试件,对其进行了拟静力试验,研究了支撑滞回特性、耗能能力、残余变形等性能。结果表明在低周往复荷载下支撑的摩擦耗能系统与碟簧复位系统能有效的共同工作,呈现出饱满的旗形滞回曲线,具有稳定的耗能能力和良好的自复位性能。恢复力模型计算得到的支撑滞回曲线与试验结果吻合较好,残余变形接近,表明所建立的恢复力模型能够准确描述ASCED支撑在低周往复荷载下的滞回特性及自复位性能。
An assembled self-centering energy dissipation (ASCED) brace is proposed, which consists of an inner bar, an outer tube, a friction energy dissipation system and a disc-spring self-centering system. The working principle and mechanical behavior of the ASCED brace under low cyclic loading are presented. A restoring force model of the ASCED brace is developed on the basis of the classical Bouc-Wen model. An ASCED brace specimen with a total length of 1.2 m was designed and fabricated, and a series of quasi-static tests were conducted to study its hysteretic behavior, energy dissipation capacity, residual deformation and other properties. The results indicate that the friction energy dissipation system and the disc-spring self-centering system of the ASCED brace can work together effectively, and the ASCED brace exhibits full hysteretic responses with stable energy dissipation and excellent self-centering capabilities. The hysteresis curve calculated by the restoring force model agrees well with the experimental results and has similar residual deformation, indicating that the proposed restoring force model can accurately describe the hysteretic behavior and self-centering performance of the ASCED brace.
作者
徐龙河
孙雨生
要世乾
李忠献
XU Long-he;SUN Yu-sheng;YAO Shi-qian;LI Zhong-xian(School of Civil Engineering,Beijing Jiaotong University,Beijing 100044,China;Key Laboratory of Coast Civil Structure Safety of China Ministry of Education,Tianjin University,Tianjin 300072,China)
出处
《工程力学》
EI
CSCD
北大核心
2019年第6期119-127,146,共10页
Engineering Mechanics
基金
国家自然科学基金项目(51578058)
北京市自然科学基金项目(8172038)
关键词
装配式自复位耗能支撑
恢复力模型
滞回特性
拟静力试验
残余变形
assembled self-centering energy dissipation brace
restoring force model
hysteretic behavior
quasi-static test
residual deformation
