水平位移加载方式对铅芯橡胶支座力学性能的影响  

Influence of imposed lateral displacement mode on mechanical performance of lead-centered rubber bearings

作　　者：王建强[1] 刘耀东[1] 辛伟 李政[1] 赵军[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]成都基准方中建筑设计有限公司,四川成都610021

出　　处：《铁道建筑》2015年第9期29-31,共3页Railway Engineering

基　　金：国家自然科学基金项目(U1204502);河南省重点科技攻关项目(102102210062);河南省高校科技创新团队(15IRTSTHN026)

摘　　要：对铅芯橡胶支座进行了压、剪力学性能试验,研究了不同水平位移加载顺序和加载频率对支座力学性能的影响。结果表明:水平位移递增加载时支座的屈服力、屈服后刚度、水平等效刚度和等效阻尼比均大于递减加载时支座的性能,随着支座剪切变形的增大,加载顺序对支座屈服后刚度和水平等效刚度的影响逐渐减小;水平位移加载频率较小时,加载频率对支座力学性能有一定的影响,随着加载频率的增大,加载频率对支座力学性能的影响逐渐减小。The compressive-shear tests of the lead-centered rubber bearings were carried out, the inf luence of the loading sequence and loading frequency on the mechanical performance of the bearings was studied.The results show that when the lateral displacement of the bearing is increased,the yield force,post-yield stiffness,horizontal equivalent stiffness and equivalent damping ratio are greater than those when the lateral displacement is inclined.As the shear deformation of the bearing increases,the loading sequence has little effect on the post-yield stiffness and horizontal equivalent stiffness.When the lateral displacement loading frequency is at low level,the loading frequency affects the mechanical performance of the bearing to some extent.As the loading frequency increases,the loading frequency has little effect on the mechanical performance of the bearing.

关 键 词：铅芯橡胶支座 力学性能 加载顺序 加载频率 

分 类 号：U443.361[建筑科学—桥梁与隧道工程]