串联隔震橡胶支座力学性能试验研究  

Test study on mechanical property of isolators connecting in series

作　　者：沈朝勇[1] 马玉宏[1] 黄襄云[1] 陈洋洋[1] 

机构地区：[1]广州大学工程抗震研究中心,广东广州510405

出　　处：《四川建筑科学研究》2014年第3期152-156,共5页Sichuan Building Science

基　　金：国家重点基础研究发展计划资助项目(973项目)(2011CB013606)(2012CB723304);十二五国家科技支撑计划项目(2012BAJ07B02)

摘　　要：通过本文的研究,了解串联天然隔震橡胶支座和串联铅芯隔震橡胶支座基本性能及其各种水平相关性能。文中分别对4-LNR-D100和4-LRB-D100支座进行了水平基本性能和剪切性能的应变相关性、压应力相关性及加载频率相关性试验,研究了其对串联支座水平性能的影响。对比分析了单个支座和串联支座基本性能的差异,同时研究了是否有竖向约束对部分相关性能的影响。研究结果表明,由于弯曲变形的存在,4-LNR-D100的水平刚度较1-LNR-D100值的1/4低,4-LRB-D100的屈服后刚度、等效刚度较1-LRB-D100值的1/4低,4-LRB-D100的屈服力较1-LRB-D100值也低,但两者等效阻尼比变化不大;但竖向约束对串联支座的应变相关性影响较大。According to study on this paper, basic property and various kinds of dependencies of horizontal properties about LNR connecting in series and LRB connecting in series will be known. In this paper, a series of test research on dependency of horizontal mechanical performance and basic property about 4-LNR-D100 and 4-LRB-D100 had been done, which included shear-strain dependency,pressure dependency and fi＇equency dependency, their effects on shear properties were researched. Comparative study on the basic properties of isolators connecting in series and single isolator was done, vertical restrain effect on horizontal properties dependency was also considered. Test research results indicate that the horizontal stiffness of 4-LNR-D100 is lower than one-fourth value of that of 1-LNR-DIO0 ,the post-yield stiffness, the equivalent stiffness of 4-LRB-D100 are lower than one-fourth value of those of 1- LRB-D100 respeetively,yield force of 4-LRB-D100 is lower than that of 1-LRB-DI00, but there is little difference on the equivalent damping ratio between 4-LRB-D100 and 1-LRB-D100. Whether or not vertical restrain has very important effect on strain dependency of horizontal property of isolators connecting in series.

关 键 词：串联 LNR LRB 基本性能 竖向约束 

分 类 号：TU375.4[建筑科学—结构工程]