独柱墩连续弯梁桥抗倾覆稳定性分析  

Anti-overturning stability analysis of continuous curved beam bridge with single column piers

作　　者：虢玉标 南吉锋 唐焱 陈艳良 Guo Yubiao;Nan Jifeng;Tang Yan;Chen Yanliang(Central and Southern China Municipal Engineering Design&Research Institute Co.,Ltd.,Wuhan 430010,Hubei;Municipal Architecture Engineering Company,Zhongye Changtian International Engineering Co.,Ltd.,Changsha 410205,Hunan)

机构地区：[1]中国市政工程中南设计研究总院有限公司,湖北武汉430010 [2]中冶长天国际工程有限责任公司市政建筑工程公司,湖南长沙410205

出　　处：《工程建设》2020年第3期28-32,共5页Engineering Construction

摘　　要：以某互通式立交匝道独柱墩连续弯梁桥为背景,分别采用新规范(《公路钢筋混凝土及预应力混凝土桥涵设计规范》)中提出的方法及基于刚体平衡的倾覆轴算法进行抗倾覆稳定性分析,进而建立多个有限元模型,探究平曲线半径、支座横向间距和边中跨比等因素对该类桥型抗倾覆稳定性的影响规律。结果表明:采用新规范算法更为安全;增大平曲线半径、增大边支座横向间距和提高边中跨比均能提高独柱墩曲线梁桥的抗倾覆性能。Taking the project of a continuous curved beam bridge with single-column piers on a single interchange on a general stairway as background,the method proposed in the new code(Specifications for Design of Highway Reinforced Concrete and Prestressed Concrete Bridges and Culverts)and the overturning axis algorithm based on rigid body balance are used to analyze the overturning stability.Then,several finite element models are established to explore the influence rules of factors on the bridge′s overturning stability such as the radius of the horizontal curve,the lateral distance between the bearings,and the ratio of side-span tomid-span.The results show that it is safer to adopt the algorithm in the new standard,and increasing the radius of the horizontal curve,the lateral distance between the bearings,and the ratio of side-span to mid-span can improve the overturning stability of the curved bridge with single column piers.

关 键 词：独柱墩曲线梁桥 抗倾覆稳定系数 倾覆轴 曲线半径 支座横向间距 边中跨比 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]