连续刚构桥地震反应分析研究  

Seismic Research of 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535004

出　　处：《广西工学院学报》2010年第3期89-92,98,共5页Journal of Guangxi University of Technology

基　　金：广西自然科学基金资助项目(桂科自0728045);广西工学院基金资助项目(院科自0840208)资助

摘　　要：为考虑不同地震作用对大跨连续刚构桥的影响,以南宁某大桥为例建立大桥有限元模型,采用反应谱法及动态时程分析方法,将不同烈度的地震作用进行输入,分析研究了连续刚构桥的动力特征及地震反应,结果表明:连续刚构桥悬臂梁根部及桥墩底部断面的弯矩变化较大,设计时应该加以重视.This paper takes a Bridge in Nanning as an example to research the effect of earthquakes of different magnitudes on large-span continuous rigid frame bridge.Finite element model has been built by Midas software,and response spectrum method and dynamic time-history analysis method have been used to analyze the model suffered from different seismic intensities in three directions（longitudinal,transverse and vertical）.It indicates that the bending moments of root segments of cantilever beams and the bottom sections of piers are changing a lot by dynamic characteristics and seismic responses,which include frequencies,vibration modes,displacements and internal forces of the bridge.It should be attached importance to in design.

关 键 词：连续刚构桥 地震反应 反应谱 时程分析 

分 类 号：TU352.1[建筑科学—结构工程]