摘要
目的研究Y形偏心支撑耗能段长度对结构的刚度、承载能力以及滞回性能的影响.方法对2榀改变耗能段长度的Y形偏心支撑框架进行循环加荷试验.介绍了试验方案和试验过程,对比分析了试件的承载能力、位移延性、耗能能力以及Y形偏心支撑框架塑性机构.结果耗能段长度对Y形偏心支撑框架强度、刚度以及耗能能力影响较大;耗能段长度越短,Y形偏心支撑框架强度和刚度越大;结构主要由耗能段进入塑性形成塑性机构耗散地震能量;耗能段与支撑之间的连接破坏导致结构失效;试件的位移延性系数为3.62～4.44,结构的位移延性较好.结论 Y形偏心支撑耗能段长度选取合理,结构抗侧刚度高、抗震性能好.
In order to research stiffs, strength and energy-dissipation of Y-eccentrically braced frames in changing length of links, the one-bay two-story test specimen was carded out under low reversed cyclic loading. Process and method of test was introduced. Load capacity, displacement ductility, hysteretic behavior, ductility, energy-dissipation and plastic mechanism of Y-eccentrically braced frames were analyzed. Experimental studies and analysis show that changing lengths of links have effect on strength, stiffness and energydissipation capacity of Y-eccentrically braced frames. The length of links is shorter, the Y-eccentrically braced frames strength and stiffness are bigger. The links entering the plasticity to form the plastic mechanism dissipate structure seismic energy. Failure of connection between links and braces causes the structure expiration. Specimens have good displacement capacity and the displacement ductility ratios is between 3.62 - 4. 44. The length of links was designed reasonably, and then Y-eccentrically braced steel frames provide high stiffness and well resistant-seismic.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2012年第1期1-7,共7页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(51078248)
江苏省青蓝工程资助项目
关键词
Y形偏心支撑
框架
耗能段
抗震性能
Y-eccentrically braced
frames
links
seismic performance
