装配式钢-混组合连续梁桥钢箱梁设计要点  

Design Points of Steel Box Girder of Prefabricated Steel-concrete Composite Continuous Girder Bridge

作　　者：罗亮 张家亮 LUO Liang;ZHANG Jialiang(Zhongjiao Tongli Construction Co.,Ltd.,Xi'an,Shaanxi 710075,China)

机构地区：[1]中交通力建设股份有限公司,陕西西安710075

出　　处：《黑龙江交通科技》2025年第3期80-84,共5页Communications Science and Technology Heilongjiang

摘　　要：为了保证公路桥梁的跨越能力、施工效率,更好地实现节能环保,拟采用装配式钢-混组合连续梁桥。从箱室个数、开口情况、腹板斜率等方面分析了钢箱梁截面形式的选择,对比了钢箱梁的立面布置(等高度梁、变高度梁),分析了钢箱梁主梁梁高、桥面板厚度、腹板厚度、钢箱翼缘尺寸等的估算方法,分析了钢箱梁横隔板(行驶和间距)、腹板加劲肋、剪力键等设计方法。以G105公路的装配式钢-混组合连续箱梁桥为例,借助数学模型和软件对钢箱的腹板厚度和底板厚度进行优化,研究成果表明:其他参数不变的条件下,腹板厚度超过28 cm,底板厚度超过18 cm,变形量满足设计要求,此时钢箱梁造价最低,截面最优。In order to ensure the spanning capacity and construction efficiency of highway bridges,to better achieve energy conservation and environmental protection,the assembled continuous girder bridge is proposed.In this paper,the selection of steel box girder section form is analyzed from the aspects of the number of box rooms,openings,web slope,etc.,the estimation methods of girder height,deck thickness,web thickness and flange size of steel box girder are analyzed,the design methods of steel box girder diaphragm(driving and spacing),web stiffener and shear key are analyzed.Taking the assembled steel-concrete composite continuous box girder bridge of G105 highway as an example,the web thickness and the bottom plate thickness of the steel box are optimized by means of mathematical model and software,the results show that the web thickness is more than 28 cm,the bottom thickness is more than 18 cm,the deformation meets the design requirements,and the cost of steel box is the lowest.

关 键 词：装配梁组合梁桥 钢箱梁 上部结构 尺寸设计 截面优化 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]