设置限位器的双向隔震铁路桥梁动力响应特性研究  

Research on the dynamic performance of railway bridge bidirectional seismic isolation bearings with deformation restrict

作　　者：于芳[1] 温留汉.黑沙 周福霖[1,2] 

机构地区：[1]哈尔滨工业大学深圳研究生院,广东深圳518055 [2]广州大学工程抗震研究中心,广东广州510405

出　　处：《土木工程学报》2010年第S1期345-351,共7页China Civil Engineering Journal

基　　金：国家自然科学基金(50608021);国家教育部博士点专项基金(20061078001)

摘　　要：通过在铅芯橡胶支座的两侧安装X型钢棒,形成有限位功能的铁路桥梁专用的双向隔震支座,有效限制中、小地震作用下支座的相对位移,保证中、小地震作用下轨道结构不发生破坏,以及列车运行的安全性。利用反应谱法设计铅芯橡胶支座和X型钢棒限位器,并采用ANSYS建立精细有限元模型,对铅芯橡胶支座双向隔震桥梁模型和采用新型双向隔震支座的桥梁模型进行地震时程响应的对比分析。分析结果表明,新型隔震支座在中、小地震下有效限制桥梁上部结构的位移,保护轨道结构不破坏,大震时具有较好的隔震减震效果。A new type seismic isolation bearing with deformation restriction function had been designed by setting X-type restrainer at both sides of rubber lead bearings for Railway Bridge,which can prohibit the destruction of track system under break load of train and occasional and frequent earthquakes,and protect running safety of train.The rubber lead bearings and X-type dampers were designed with response spectrum method respectively and accurate FE modal had been established with ANSYS to compare the response of Non-isolation Bridge,seismic isolation bridge with rubber lead bearing and seismic isolation bridge with new type bearing under earthquakes.The results show that the new type bearing can restrict the deformation of the track system effectively.The track system remains non-destruction state under occasional and frequent earthquake and has a good seismic isolation effect under rare earthquakes.

关 键 词：双向隔震 铅芯橡胶支座 钢限位器 铁路桥梁 

分 类 号：U441.3[建筑科学—桥梁与隧道工程]