某下承式钢管拱肋钢箱梁系杆拱桥拱梁接合部设计
发布时间：2018-12-17 06:31
【摘要】：某下承式钢管拱肋钢箱梁系杆拱桥主桥为不等跨三连拱桥,跨径布置为(60+136+208+136+60)m。结构体系为墩梁分离、拱梁固结,拱肋由外倾式钢管主拱和空间曲线的钢管副拱组成。边跨60m主梁采用混凝土箱梁,拱跨主梁为钢箱梁。下部结构采用Y形混凝土桥墩。钢管拱肋与钢箱梁连接处采用了一种新型的连接构造形式,在钢箱梁顶面对应纵腹板及横隔板的位置熔透焊一个矩形结构,将钢管拱肋伸入到矩形结构中,拱肋与钢箱梁通过矩形结构连接成整体,内力通过矩形结构顺利传递。利用有限元程序ANSYS建立拱梁接合部局部模型进行分析,结果表明,整体受力性能良好、传力可靠,是一种合理的构造设计。
[Abstract]:The main bridge of a through steel box girder arch bridge with steel arch rib is three continuous arch bridge with unequal span, and the span arrangement is (60 136 208 136 60) m. The structure system is composed of pier-beam separation, arch beam consolidation, arch rib is composed of extroverted steel pipe main arch and space curve steel pipe auxiliary arch. The side span 60 m main girder adopts concrete box girder, and the arch span main girder is steel box girder. The lower structure adopts Y-shaped concrete pier. A new type of connection structure is adopted in the connection between steel pipe arch rib and steel box girder. The steel tube arch rib is inserted into the rectangular structure by melting through a rectangular structure at the position corresponding to the longitudinal web and transverse diaphragm on the top surface of the steel box girder. Arch rib and steel box girder are connected as a whole through rectangular structure, and internal force is transferred smoothly through rectangular structure. The finite element program ANSYS is used to establish the local model of the arch beam joint. The results show that the overall stress performance is good, the force transfer is reliable, and it is a reasonable structural design.
【作者单位】： 中铁大桥勘测设计院集团有限公司;
【分类号】：U448.225
[Abstract]:The main bridge of a through steel box girder arch bridge with steel arch rib is three continuous arch bridge with unequal span, and the span arrangement is (60 136 208 136 60) m. The structure system is composed of pier-beam separation, arch beam consolidation, arch rib is composed of extroverted steel pipe main arch and space curve steel pipe auxiliary arch. The side span 60 m main girder adopts concrete box girder, and the arch span main girder is steel box girder. The lower structure adopts Y-shaped concrete pier. A new type of connection structure is adopted in the connection between steel pipe arch rib and steel box girder. The steel tube arch rib is inserted into the rectangular structure by melting through a rectangular structure at the position corresponding to the longitudinal web and transverse diaphragm on the top surface of the steel box girder. Arch rib and steel box girder are connected as a whole through rectangular structure, and internal force is transferred smoothly through rectangular structure. The finite element program ANSYS is used to establish the local model of the arch beam joint. The results show that the overall stress performance is good, the force transfer is reliable, and it is a reasonable structural design.
【作者单位】： 中铁大桥勘测设计院集团有限公司;
【分类号】：U448.225
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