变截面软钢剪切阻尼器试验研究  

EXPERIMENTAL STUDY OF STEEL SHEAR PANEL DAMPERS WITH VARYING CROSS-SECTIONS

作　　者：邓开来[1] 潘鹏[1] 

机构地区：[1]清华大学土木工程安全与耐久教育部重点试验室,北京100084

出　　处：《工程力学》2016年第5期82-88,共7页Engineering Mechanics

基　　金：国家自然科学基金项目(51178250;51422809);清华大学自主科研项目(2014z2206)

摘　　要：普通软钢剪切屈服阻尼器的低周疲劳破坏常发生在加劲肋焊缝热影响区。为了提高软钢剪切阻尼器的低周疲劳性能,相关研究提出了耗能区域无焊缝的变截面软钢剪切阻尼器,并对其进行了形状优化。该文根据该优化结果,设计了5个变截面软钢剪切阻尼器试件并进行了拟静力试验研究。试验中考察了不同宽度和高度的阻尼器在往复荷载下的力学性能。试验结果显示,试件出现了不同程度的面外屈曲,屈曲程度与耗能板高度和宽度相关。在ABAQUS中建立了该阻尼器的有限元模型,并利用该有限元模型对试验结果进行了补充。根据试验与有限元计算结果,提出了该软钢剪切阻尼器屈服位移,屈服承载力以及面外变形的计算公式。In conventional steel shear panel dampers（SSPDs）, low cycle fatigue damage usually appears on the weld heat affect zone. A new SSPD with varying cross-sections and no-weld energy dissipation plate was developed, and the shape of which was optimized. 5 new SSPDs were designed and tested in this study. The width and height of the SSPDs were selected as the test parameters. In the tests, the specimens showed different levels of out-of-plane buckling. The degree of buckling depended significantly on the width and height of the new SSPDs. Finite element analyses were conducted to supplement the physical tests. The formulas for the estimation of yield displacement, yield restoring force and out-of-plane deformation are derived based on the results obtained from the physical test and finite element analyses.

关 键 词：变截面软钢剪切阻尼器 拟静力试验 有限元分析 优化设计 面外稳定 

分 类 号：TU352.1[建筑科学—结构工程]