抛物线外形软钢阻尼器试验研究  

Experimental study of mild steel dampers with parabolic shape

作　　者：徐艳红[1] 李爱群[2] 黄镇[2] 

机构地区：[1]东南大学土木工程学院,江苏南京210096 [2]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096

出　　处：《建筑结构学报》2011年第12期202-209,共8页Journal of Building Structures

基　　金：国家杰出青年基金项目(50725858)

摘　　要：提出一种新型的具有抛物线外形的软钢阻尼器,该阻尼器具有全长截面同时屈服的特点,可充分发挥软钢的材料功效。根据力学相关理论,推导出了该阻尼器的外形设计公式。按公式设计了软钢阻尼器,对两组阻尼器进行了拟静力试验,试验结果表明:具有抛物线外形的软钢阻尼器能有效地避免应力集中,具有稳定的滞回性能和良好的塑性变形能力,是一种理想的耗能元件。最后,用有限元软件分析了加载过程中的应变分布及滞回性能,结果与理论和试验研究相一致,为进一步优化阻尼器参数提供了合理的有限元模型。This paper presents a new mild steel damper with parabolic shape,which has the characteristics of all the section yielding at the same time along the length direction.According to the related mechanics theory,the design formula was deduced.Quasi-static tests were conducted.The results show that the dampers possess the stable hysteretic capacity,sufficient plastic deformation capacity,and effectively avoid stress concentration phenomenon.The proposed damper is a kind of ideal energy dissipation component.Strain distribution and hysteretic capacity are studied by finite element software and the results agree with those obtained from theory and experimental research.

关 键 词：软钢阻尼器 拟静力试验 力学性能 

分 类 号：TU352.1[建筑科学—结构工程] TU317.1