偏心支承对120°圆心角双跨弯箱梁桥的影响  

Influences of Eccentric Supports on Two-Span Curved Box Girder Bridges with 120°Central Angles

作　　者：宋国华[1] 罗玲[2] 王东炜[1] 

机构地区：[1]郑州大学土木工程学院,河南郑州450002 [2]北京工业大学建筑工程学院

出　　处：《桥梁建设》2005年第4期44-47,共4页Bridge Construction

基　　金：国家自然科学基金资助项目(50178064)

摘　　要：通过对72个圆心角为120°的双跨偏心支承弯箱梁桥模型的计算分析,以梁格系法为基础编制的3D-BSA软件系统为结构计算工具,用统计分析的方法建立双跨偏心支承弯箱梁桥结构反应在使用极限状态及承载能力极限状态下与桥梁跨长、支承偏心距等参数间的经验公式,为双跨偏心弯箱梁桥的实用设计提出适当建议或借鉴依据。Through calculation and analysis of 72 models of two-span curved box girder bridges with 120° central angles resting on eccentric supports, and also by means of structure calculation tool of the software system 3D-BSA based on beam-grid system method, the statistic analysis method is used to set up empirical formulas for structural responses of the two-span curved box girders in relation to parameters of bridge span length and eccentricity of the supports under ultimate service load and ultimate carrying capacity. The calculation and analysis herewith provide suggestions and reference for practical design of the type of the two-span curved box girder bridges.

关 键 词：曲线桥 箱形梁 偏心支承 设计 经验公式 

分 类 号：U448.213[建筑科学—桥梁与隧道工程] U448.42[交通运输工程—道路与铁道工程]