公铁两用钢桁梁桥设计毕业论文.doc

PAGE 毕业设计 公铁两用钢桁梁桥设计 Design of Highway and Railway Double Use Steel Truss Bridge 摘 要 伴随着重载交通迅速发展的需要，公铁两用钢桁梁桥在近十年里取得了重大突破和发展，有着广阔的前景。 本文主要进行4×48单线铁路公铁两用钢桁梁桥的设计计算。首先，选取主桁几何图式，确定公路与铁路荷载，计算主桁杆件内力以及选取各杆件截面。其次，进行桥面系、联结系和公路桥面板的计算。最后，进行桁架上拱度和支座设计。 本设计对公铁两用桁架梁桥进行了详细的设计与计算，对公铁两用桁架梁桥施工过程有一定的参考价值。 关键词：公铁两用 钢桁梁桥 H型截面 Abstract With the needs of rapid development of Heavy traffics, the Double Use Steel Truss Bridge for Highway and Railway have made a major breakthrough and development in the past decade, there are broad prospects. This paper is mainly on the design of a 4×48m two-iron steel truss bridge. First, select the Geometric Schema of the main truss, determine the highway and railway loads, calculate internal forces of the main truss member and choose the cross-section of the member bar. Second, calculate the deck system, the link system and the highway deck plate. Finally, design the support abutment and the camber of the girder grillage. This paper carries out a detailed design and calculation for the dual-use iron truss bridge, which would provide a certain value for the construction process of the dual-use iron truss bridge. Key words: double use on highway and railway Steel truss bridge H-section 目　录 TOC \o 1-4 \h \z \u HYPERLINK \l _Toc200521997 HYPERLINK \l _Toc200521998 第1章 绪论 PAGEREF _Toc200521998 \h 1 HYPERLINK \l _Toc200521999 1.1 钢桁梁桥的主要特点 PAGEREF _Toc200521999 \h 1 HYPERLINK \l _Toc200522000 1.2 公铁两用钢桁架梁桥的连接 PAGEREF _Toc200522000 \h 1 HYPERLINK \l _Toc200522001 1.3 公铁两用钢桥的发展情况 PAGEREF _Toc200522001 \h 2 HYPERLINK \l _Toc200522002 1.4 公铁两用钢桁架梁桥的前景展望 PAGEREF _Toc200522002 \h 3 HYPERLINK \l _Toc200522003 1.5 设计主要内容概述 PAGEREF _Toc200522003 \h 5 HYPERLINK \l _Toc200522004 第2章 主桁几何图式确定及主力作用下各杆件内力计算 PAGEREF _Toc200522004 \h 6 HYPERLINK \l _Toc200522005 2.1 概述 PAGEREF _Toc200522005 \h 6 HYPERLINK \l _Toc200522006 2.2 恒载计算 PAGEREF _Toc200522006 \h 7 HYPERLINK \l _Toc200522007 2.3 影响线面积计算 PAGEREF _Toc200522007 \h 7 HYPERLINK \l _Toc200