连续刚构桥施工阶段地震响应分析研究  

Seismic Respond Analysis on Continuous Rigid Frame Bridge under Construction

作　　者：唐咸远[1,2] 邓志恒[2] 

机构地区：[1]广西工学院土木建筑工程系,广西柳州545006 [2]广西大学土木建筑工程学院,广西南宁530004

出　　处：《中国港湾建设》2011年第1期11-15,共5页China Harbour Engineering

基　　金：广西自然科学基金项目(桂科自0728045);广西自然科学基金项目(桂科自0832061);广西科技攻关项目(桂科攻0816006-5);广西工学院基金资助项目(院科自0840208)

摘　　要：为研究不同地震作用对大跨连续刚构桥建造过程中不同施工阶段的响应,结合新颁布的公路桥梁抗震设计细则,以南宁仙葫大桥为例建有限元模型,采用反应谱法及动态时程分析方法,输入不同烈度的地震作用,对采用悬臂法施工的不同施工阶段的地震响应进行分析对比,结果表明连续刚构桥建造过程中悬臂端位移、主梁根部弯矩及桥墩底部弯矩变化较大,研究结果可以对大跨度连续刚构桥的动力特性以及地震反应特性有更深入的了解。In order to study the influences of different earthquakes on long-span continuous rigid frame bridge construction in different construction stages,combining the newly published Aseismatic Design Details of Highways and Bridges,as the example of Xianhu Bridge in Nanning city,finite element model has been built.By response spectrum method and dynamic time-history analysis method,and suffered from different seismic intensities,the seismic responds in different construction stages by cantilever construction method are analyzed and compared.The results show that the cantilevered end displacements,bending moment in main beam root and pier bottom have great change during the construction.The results have a greater understanding of long-span continuous rigid frame of the dynamic characteristics and seismic response.

关 键 词：连续刚构桥 悬臂法施工 地震响应 反应谱 时程分析 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]