钢—混组合梁桥设计参数与经济性对比分析  

Comparative Analysis of Design Parameters and Economy of Steel-hybrid Composite Girder Bridge

作　　者：沈航 邓文琴 张建东[1] 裴辉腾 刘朵 SHEN Hang;DENG Wen-qin;ZHANG Jian-dong;PEI Hui-teng;LIU Duo(College of Civil Engineering,Nanjing Tech University,Nanjing 211816,China;Jiangxi Communication Design and Research Institute Co.Ltd.,Nanchang 330000,China;State Key Laboratory of Safety,Durability and Healthy Operation of Long Span Bridges,Nanjing 211112,China;JSTI Group,Nanjing 211112,China)

机构地区：[1]南京工业大学土木工程学院,南京市211816 [2]江西省交通设计研究院责任有限公司,南京市330000 [3]长大桥梁安全长寿与健康运维全国重点实验室,南京市211112 [4]苏交科集团股份有限公司,南京市211112

出　　处：《公路》2025年第3期70-76,共7页Highway

基　　金：国家自然科学基金项目,项目编号52378160;山东省交通运输厅科技计划项目,项目编号2020B47;江西省交通运输厅科技项目,项目编号2023H0008。

摘　　要：为了解不同截面形式的钢—混组合梁桥设计参数取值和桥梁建设经济成本,为不同桥型的标准化设计和经济选型提供支撑,以交通运输部发布的装配化工字钢组合梁桥通用图等38套标准图集和南京长江第五大桥施工图等11套实桥施工图为依据,对比分析了30~60 m跨径的工字钢组合梁、窄幅钢箱组合梁和槽形钢箱组合梁的钢主梁翼缘板宽厚比、腹板高厚比、跨高比等参数与跨径、截面形式之间的相关性;同时,基于数据分析拟合出桥梁上部结构材料用量成本、回收利用成本、吊装运输成本与桥梁跨径之间的表达式。研究结果表明,窄幅钢箱梁上翼缘板宽厚比约为工字钢梁的3.19~7.35倍,约为槽形钢箱梁1.57~3.77倍;窄幅钢箱梁腹板高厚比受跨径影响较大,跨径由30 m增大至60 m时,高厚比增加48.9%;在30~40 m跨径时,采用工字钢梁的材料用量成本可比槽形钢箱梁节约14.33%,在45~60 m跨径时,采用窄幅钢箱的材料用量成本可比工字钢梁节约17.49%;对于桥梁上部结构的材料用量成本而言,考虑材料回收利用可节约经济成本67.33%;槽形钢箱梁的单片梁吊装成本较高,吊装重量约为工字钢梁的2.42~2.59倍,为窄幅钢箱的1.75~1.83倍。In order to understand the design parameters of steel-concrete composite girder bridges with different cross-sectional forms and the economic cost of bridge construction,and to provide support for the standardized design and economic selection of different bridge types,based on 38 sets of standard atlases such as the general drawings of assembled chemical steel composite girder bridges issued by the Ministry of Transport and 11 sets of solid bridge construction drawings such as the construction drawings of the Fifth Bridge of the Yangtze River in Nanjing,the steel flange plate width-to-thickness ratio and web height-thickness ratio of the 30~60 m span I-beam composite beam,the narrow steel box composite beam and the trough-shaped steel box composite beam were compared and analyzed.The correlation between the span-to-height ratio and the form of span and cross-section,and the expression between the cost of material consumption,recycling cost,hoisting and transportation cost and bridge span of the bridge superstructure was fitted based on data analysis.The results show that the width-to-thickness ratio of the upper flange plate of the narrow steel box girder is about 3.19~7.35 times that of the I-beam and 1.57~3.77 times that of the channeled steel box girder,and the height-thickness ratio of the web of the narrow steel box girder is greatly affected by the span diameter,with an increase of 48.9%.In the span of 30~40 m,the use of I-beam comparable channel steel box girder can save 14.33%of the material cost,in the 45~60 m span,the use of narrow steel box comparable I-beam can save 17.49%of the material cost,and the recycling of bridge materials can save 67.33%of the economic cost;The lifting cost of the monolithic girder of the trough steel box girder is higher,and the hoisting weight is about 2.42~2.59 times that of the I-beam and 1.75~1.83 times that of the narrow steel box.

关 键 词：桥梁工程 工字钢组合梁 槽形钢箱组合梁 窄幅钢箱组合梁 桥梁设计参数取值 经济性对比分析 

分 类 号：U448.216[建筑科学—桥梁与隧道工程]