大跨度小半径曲线梁桥抗倾覆性能研究  

Research on the anti-overturning performance of long-span small-radius curved beam bridges

作　　者：何雄君[1] 刘鑫[1] 梁亚兰[1] HE Xiong-jun;LIU Xin;LIANG Ya-lan(School of Transportation,Wuhan University of Technology,Wuhan 430063,China)

机构地区：[1]武汉理工大学交通学院

出　　处：《交通科学与工程》2019年第2期89-93,共5页Journal of Transport Science and Engineering

摘　　要：为研究大跨度小半径独立柱曲线梁桥的抗倾覆性能,以中间墩采用独立柱单支座的曲线连续梁桥为研究对象,通过规范中的抗倾覆系数计算公式进行抗倾覆性能验算。以武汉市某立交匝道桥为例,利用Midas梁格法,建立有限元模型并进行分析计算,研究了弯梁桥曲线半径的大小、车辆荷载的超载程度及支座的布置形式等对城市小半径独立柱曲线梁桥抗倾覆性能的影响。计算结果表明:曲线半径的取值、车辆荷载的交通管控及曲线桥的支座布置形式等均对大跨度小半径曲线梁桥的抗倾覆稳定有较大的影响。In order to study the anti-overturning performance of large-span small-radius independent column curved girder bridges, the curved continuous girder bridge with independent columns and single supports was used as the object. The anti-overturning coefficient calculation formula was used to check the anti-overturn performance. Taking a ramp bridge as an example, the finite element model was established by midas for analysis and calculation. The curve radius of the curved beam bridge, the overload degree of the vehicle load and the arrangement of the support for the anti-overturning performance of the small radius curved beam bridge was investigated. The results show that the value of the curve radius, the traffic control of the vehicle load and the bearing arrangement of the curve bridge have a great influence on the anti-overturn stability of the long-span small-radius curved beam bridge.

关 键 词：小半径曲线梁桥 独立柱 抗倾覆性能 曲线半径 超载程度 支座形式 

分 类 号：TU997[建筑科学—市政工程]