三跨上承式簡支公路钢桁架桥设计稿毕业设计稿桥梁计算书9798208.docxVIP

毕业论文三跨上承式简支公路钢桁架桥设计摘要通过对设计要求的理解以及相关资料的查询，全面了解钢桁架桥的相关知识，并根据设计相关资料最终选定上承式简支钢桁架桥。设计的主要包括了根据相关地形条件进行了方案比选，确定方案后开始进行桥的设计，先进行主桁杆件的内力计算，其中包括考虑恒载和活载的主力、横向力、制动力等作用，接着进行杆件截面设计，主桁节点设计及检算，横纵梁的内力计算与强度验算，最后进行联结系的设计及检算。所有计算完成后还需要Midas civil建模，进行结构静力分析，结构变形检算。通过数据对比来确定设计是否符合先关要求。关键字：钢桥；设计；模拟AbstractBy querying the understanding of the design requirements and relevant data, a comprehensive understanding of the relevant knowledge of the steel truss bridge, and the final selection based on design-related information on the Order of simply supported steel truss bridge. Design includes a scheme comparison carried out in accordance with the relevant terrain conditions, to determine the design of the bridge began after the program, the first for the main truss rod internal force calculation, including the dead load and live load considering the main, lateral force, braking force and so on, followed by the rod cross-section design, the main truss node design and check calculation, calculation of internal forces and transverse stringer strength checking, and finally joins the Department of design and seizure count. After the completion of all the calculations needed Midas civil modeling, structural static analysis, structural deformation detection count. By comparison of the data to determine whether the design meets the requirements first off.Keywords：steel bridge；design；simulation目录第1章绪论11.1我国钢桥的发展11.2钢桥的主要特点11.3钢桥的主要类型1第2章方案比选与桥型数据22.1 设计基本资料22.2方案的比选22.3桥型数据（设计为主跨）4第三章主桁架内力计算53.1杆件内力分析的基本假定53.2次应力51、由于主桁弦杆变形所引起的平纵联赶件的内力；53.3主桁杆件内力计算63.4恒载假定63.5主桁杆件内力计算73.6横向附加力作用下主桁架杆件的内力计算123.6.1平纵联上的横向风力分布集度计算123.6.2上平纵联弦杆123.6.3下平纵联弦杆133.6.4桥门架效应产生的杆件内力计算143.7纵向制动力作用下主桁杆件的内力计算153.8内力组合及主桁杆件计算内力的确定16第4章主桁杆件的截面设计与验算194.1主桁杆件的截面形式与尺寸194.2主桁杆件截面设计与验算194.2.1下弦杆的设计194.2.2上弦杆的设计254.2.3腹杆设计324.2.4端斜杆的设计42第5章主桁节点的设计455.1节点设计的基本要求455.2节点设计步骤455.3主桁节点的设计原理455.4主桁节点设计计算465.4.1节点E5的设计465.4.2 节点E3的设计515.4.3节点E1的设计535.4.4节点A3的设计555.4.5节点A1的设计57第6章纵、横梁的内力计算和强度检算596.1设计步骤596.2内力计算和强度检算606.2.1纵梁的设计计算60第7章联结系667.1平纵联66