独柱墩连续梁桥的稳定影响因素分析  

Analysis of Influence Factors of Structure Stability for Single-Column Pier Continuous Girder Bridge

作　　者：吴玉华[1] 蔡若红 杨育人[1] 

机构地区：[1]浙江工业大学之江学院,浙江杭州310024 [2]杭州市城建设计研究院有限公司,浙江杭州310001

出　　处：《公路工程》2011年第6期93-96,106,共5页Highway Engineering

摘　　要：以诸永高速金华台州段工程为例,采用MIDAS有限元分析程序,构建了23座独柱墩连续箱梁桥的仿真模型,系统分析和总结了影响弯梁桥稳定性的主要影响因素,如曲率半径、桥梁长度、联端支座间距、独柱墩支座预设偏心等。结果表明:桥梁曲率半径对支座负反力影响很大,当曲率半径小于200 m,桥梁长度大于100 m时较易发生支座脱空现象;增大联端支座间距,合理设置支座偏心距,可减小支座出现脱空的可能性,提高桥梁的抗倾覆能力。Taking the case of Jinhua-Taizhou section of zhuyong highway,23 simulation models of single-column pier continuous girder bridge were established by MIDAS finite element program.The major factors which would affect the stability of curved girder bridge,such as the radius of curvature,the length of bridge,the space between two bearings and the offset distance of bearing placed on the single-column pier etc.The results show that the radius of curvature has great effect on the negative counter-force of bearing.The bearing separation is likely to occur when the radius of curvature is less than 200 m and the length of bridge is greater than 100 m.That the appropriate layout offset distance of bearing and enlargement of the space between bearings can assure lower possibility of bearing separation and enhance the ability of bridge performance against overturning.

关 键 词：桥梁工程 独柱墩 连续曲梁 支座反力 

分 类 号：U442.59[建筑科学—桥梁与隧道工程]