城市小半径曲线梁桥内力分析及支承方案设计优化  

Analysis of Inner Force and Design Optimization of Supporting Scheme for Urban Small-radius Curved Beam Bridge

作　　者：张敬天 孔艺达 

机构地区：[1]重庆市设计院,重庆市400015

出　　处：《城市道桥与防洪》2018年第4期72-74,93,共4页Urban Roads Bridges & Flood Control

摘　　要：介绍了曲线梁桥的受力特点,并对不同支承方式的优缺点进行分析。以重庆某立交小半径曲线匝道桥为工程实例,运用结构分析软件Midas Civil分析不同支承条件下支反力与结构内力。结合《公路钢筋混凝土及预应力混凝土桥涵设计规范》(JTG D62—2012)中关于抗倾覆稳定系数的公式,验算不同支承条件下的抗倾覆稳定系数,为类似桥梁优化设计提供参考。The article introduces the stress characteristics of curved beam bridge,and analyzes the advantages and disadvantages of the different supporting modes.Taking a small-radius curved ramp bridge of interchange in Chongqing as an engineering case,the article analyzes the supporting reactions and structural inner forces under the different support conditions by the use of structural analysis software Midas Civil. Combined with the formula of antidumping stability coefficient in Design Specifications for Highway Steel Reinforced Concrete and Pre-stressed Concrete Bridge Culvert(JTG D62-2012),the article checks and calculates the antidumping stability coefficients under the different support conditions,which can be referred for the design optimization of the similar bridges.

关 键 词：小半径 曲线梁桥 支承设计 内力分析 抗倾覆稳定性 

分 类 号：U441.5[建筑科学—桥梁与隧道工程]