子模型法在超大跨悬索桥钢箱梁应力分析中的应用  

STRESS ANALYSIS ON STEEL BOX GIRDERS OF SUPER-LONG-SPAN SUSPENSION BRIDGES WITH SUBMODEL METHOD

作　　者：李爱群[1] 王浩[1] 

机构地区：[1]东南大学土木工程学院,江苏南京210096

出　　处：《工程力学》2007年第2期80-84,共5页Engineering Mechanics

基　　金：国家自然科学基金重大国际合作项目(50410133);国家自然科学基金重点项目(50538020);高等学校科技创新工程重大项目培育资金项目(704024);东南大学优秀博士学位论文基金资助(YBJJ0508)

摘　　要：以国内第一大跨桥梁——润扬长江公路大桥南汊悬索桥为背景,在对大桥整体结构进行非线性有限元分析的基础上,运用子模型法计算了该桥扁平钢箱梁各关键部位的应力。与实测数据的对比表明:子模型法计算结果准确可靠,能够较真实的反映大桥钢箱梁在各种工况下的受力状态,是分析超大跨悬索桥钢箱梁应力水平及其分布的有效方法。最后分析了该桥钢箱梁的受力特点,为同类流线形扁平钢箱梁的应力分析和设计提供参考依据。A 3-dimensional, Finite Element, full model for the Runyang Suspension Bridge, the longest bridge in China was established and analyzed. The submodel of the steel box girder was then particularly established based on the analyzed results considering the connection of the two models. The local stresses of the steel box girder under various load conditions were calculated with the submodel. The calculation stress values were found to be reliable by comparing with the field measurements and the submodel method was proved to be effective on analyzing the stress levels and distributions of steel box girders of super-long-span suspension bridges. Finally the working behaviors and mechanical characteristics of the steel box girder of the Runyang Suspension Bridge were analyzed. The analysis results could provide theoretical references for analyzing the steel box girders of super-long-span suspension bridges.

关 键 词：超大跨悬索桥 钢箱梁 子模型法 有限元 应力分析 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]