竖向荷载对铅芯橡胶支座力学性能的影响  

Influence of vertical load on mechanical properties of lead-rubber bearings

作　　者：王建强[1] 申旭[2] 李政[1] 赵卓[3] 赵军[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450001 [2]机械工业勘察设计研究院,陕西西安710001 [3]宁波工程学院建筑工程学院,浙江宁波315211

出　　处：《世界地震工程》2015年第2期143-147,共5页World Earthquake Engineering

基　　金：国家自然科学基金(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有限元分析,研究了竖向荷载对支座力学性能的影响。分析表明:随着竖向荷载的增大,支座的极限位移逐渐减小,支座易发生整体失稳;支座的屈服后刚度和水平等效刚度随竖向荷载的增大而降低,支座的等效阻尼比随竖向荷载的增大而增大;并且在双向压剪作用下,竖向荷载对支座力学性能的影响幅度更大。因而,在实际工程中,应重视竖向荷载对支座力学性能的影响,以保证支座的稳定性。Finite element analysis of lead - rubber bearings was carried out, the influence of vertical load on the mechanical properties of lead -rubber bearings was studied. The results show that as the vertical load increases, the ultimate displacement of the bearing decreases, the bearing is easy to buekle. As the vertical load increases, the post -yield stiffness and the equivalent stiffness decrease, and the equivalent damping ratio increases. In bidi- rectional compress - shear state, the vertical load has greater influence on the mechanical properties of the bearings. Therefore, the influence of the vertical load on the mechanical properties of the bearing should be considered to en- sure the stability of the bearing.

关 键 词：铅芯橡胶支座 竖向荷载 力学性能 极限位移 

分 类 号：TU352.1[建筑科学—结构工程]