预压弹簧自恢复耗能支撑受力性能分析与试验研究  

Mechanical behavior analysis and experimental study on pre-pressed spring self-centering energy dissipation brace

作　　者：徐龙河[1] 樊晓伟[1] 代长顺[1] 李忠献[2] 

机构地区：[1]北京交通大学土木建筑工程学院,北京100044 [2]天津大学滨海土木工程结构与安全教育部重点实验室,天津300072

出　　处：《建筑结构学报》2016年第9期142-148,共7页Journal of Building Structures

基　　金：国家自然科学基金重大研究计划集成项目(91315301-03);国家自然科学基金项目(51322806;51578058);中央高校基本科研业务费专项(2014JBZ011)

摘　　要：预压弹簧自恢复耗能支撑由内管、外管、摩擦耗能装置及组合碟簧自复位装置组成,对其受力性能进行分析,并建立了描述该支撑滞回特性的恢复力预测模型。通过对预压弹簧自恢复耗能支撑的低周往复加载试验,研究其滞回特性、自恢复性能及耗能能力,并与建立的预测模型进行了对比分析。结果表明:预压弹簧自恢复耗能支撑具有稳定的"旗形"滞回曲线,耗能能力随摩擦耗能装置提供摩擦力的增大而增大,且碟簧间及碟簧与内管间摩擦可为支撑提供一定耗能能力;当碟簧预压力能够克服摩擦耗能装置提供的摩擦力时,支撑具有更好的自恢复性能。所建立的恢复力预测模型与试验的滞回曲线吻合较好,能够有效地反映支撑的实际受力情况。The pre-pressed spring self-centering energy dissipation （PS-SCED） brace is composed of inner tube, outer tube, friction energy dissipation devices and combination disc springs self-centering mechanisms. The mechanical behaviors of brace were analyzed, and the prediction model which can portray the hysteretic behavior of brace was developed. A series of low-cyclic reversed loading tests of the PS-SCED brace were carried out to study its hysteretic behavior, self-centering and energy dissipation capabilities, and comparison between the prediction model and tests results were also conducted. Results indicate that PS-SCED brace exhibits stable flag-shaped hysteretic behaviors. The energy dissipation capability is enhanced with the increase of friction force provided by the friction devices, and contact friction between disc springs and between disc springs and inner tube also can provide energy dissipation for the PS- SCED brace. And better self-centering capacity can be achieved by the PS-SCED brace when the pre-pressing force of disc springs is large enough to overcome the friction force provided by friction devices. Hysteretic curves of the proposed prediction model have good agreement with that of tests, demonstrating that the prediction model can better reflect the actual force situation of the brace.

关 键 词：自恢复耗能支撑 组合碟簧 拟静力试验 受力性能 

分 类 号：TU352.1[建筑科学—结构工程]