双层三柱式门架墩高架桥抗震性能及合理约束体系研究  

Research on Seismic Performance and Reasonable Restraint System of Double-deck Three-column Frame Pier Viaduct

作　　者：黄志涵 李名华 师少辉[3] 肖正豪 HUANG Zhi-han;LI Ming-hua;SHI Shao-hui;XIAO Zheng-hao(Guangdong Bay Area Transportation Construction Investment Co.Ltd.,Guangzhou 510699,China;CCCC Highway Bridges National Engineering Research Centre Co.Ltd.,Beijing 100088,China;CCCC Second Highway Consultants Co.Ltd.,Wuhan 430056,China)

机构地区：[1]广东湾区交通建设投资有限公司,广州市510699 [2]中交公路长大桥建设国家工程研究中心有限公司,北京市100088 [3]中交第二公路勘察设计研究院有限公司,武汉市430056

出　　处：《公路》2024年第7期110-115,共6页Highway

摘　　要：为研讨双层三柱式门架墩高架桥的抗震性能和合理约束体系,以一座典型的三柱式门架墩高架桥为依托工程,采用SAP2000建立了有限元动力分析模型,通过动力时程分析对比了两种约束体系的抗震性能,并以墩高为参数分析了关键截面内力和支座位移与墩高的关系。研究结果表明,双层高架桥的下层地震响应显著高于上层,且桥墩和桩基内力随墩高的增加而增大,而支座位移随墩高的增加呈减小趋势;板式橡胶支座和减隔震支座两种约束体系下的地震响应相近,而板式橡胶支座体系综合考虑受力和造价更优;采用板式橡胶支座体系的结构在纵、横向地震动下基本保持弹性状态,且支座未发生滑动,满足抗震性能要求。In order to discuss the seismic performance and reasonable restraint system of double-deck three-column frame pier viaduct,in the paper,a typical three-column frame pier viaduct is taken as the engineering background,a finite element dynamic analysis model is established by SAP2000 software,the seismic performance of two restraint systems is compared through time history analysis,and the relationship between the critical section internal forces and bearing displacements and the pier height are analyzed by taking the pier height as the parameter.The research results show that:seismic response of the double-deck viaduct lower deck is significantly higher than that of upper layer,and pier and pile foundation internal force increase with the increase of pier height,and bearing displacement with the increase of pier height is a decreasing trend;the seismic performance of viaduct under plate rubber bearings and seismic isolation bearings is similar,while the plate rubber bearing system consider is more favorable by considering the cost and force requirement;and the structure applied plate rubber bearing under longitudinal and transverse seismic vibration could maintain basically elastic,and the bearing did not slide,meeting the requirements of seismic performance.

关 键 词：桥梁工程 双层高架梁桥 约束体系 抗震性能 板式橡胶支座 减隔震橡胶支座 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]