预应力混凝土连续梁桥设计精选.docVIP

兰州交通大学毕业设计（论文） 摘 要 本设计根据设计要求及地理地质情况对该桥的设计，本着“适用性、舒适与安全性、经济性、先进性、美观”的原则，本论文拟定了三种不同的桥型方案进行比较和选择：方案一为简支梁桥方案，方案二为连续梁方案，方案三为梁拱组合桥。经由以上的几点原则以及设计施工等多方面考虑、比较确定预应力混凝土连续梁桥推荐方案。 预应力混凝土连续梁桥以能发挥高强材料特性，较高的刚度和抗裂性，养护维修工作少，抗震性强，运营噪声小，材料可塑性强等而成为预应力混凝土大跨径桥梁的主要桥型之一。本设计进行了细部尺寸拟定，并利用桥梁专业软件Midas Civil建立了简化模型。针对该模型进行了预应力钢束的估算及布置、静活载下的内力计算、应力验算及变形验算。经分析比较证明该桥设计计算正确，内力分布合理，符合设计任务要求。 [关键词]：预应力混凝土、连续桥梁、方案设计、悬臂施工、截面检算 ABSTRACT This design according to the design requirements and the geography and geology condition of the design of the bridge, the spirit of applicability, comfort and safety, economy, advanced, beautiful principle, this paper developed three different bridge type scheme comparison and selection: a scheme for simply supported beam bridge scheme, scheme for continuous girder, scheme three as the girder and arch combination bridge. By the above a few principles and design construction and other aspects to consider, in comparison to determine the recommended scheme of prestressed concrete continuous beam bridge. Prestressed concrete continuous beam bridge in order to be able to play high strength material properties, high stiffness and crack resistance, less maintenance and repair work, strong shock resistance, low noise operation, material plasticity and become a prestressed concrete large span bridge of the main bridge of. The design of the size of the details worked out, and the use of bridge software Midas Civil established a simplified model. According to the model of prestressed steel beam estimates and arrangement, the internal forces calculation under static live load, stress calculation and deformation calculation. After analysis and comparison show that the bridge design and calculation is correct, rational distribution of internal force, comply with the design requirements. [ Key words]: prestressed concrete, continuous bridge, cantilever construction, scheme design, cross section calculation 目 录 TOC \o 1-9 \h \u HYPERLINK \l _Toc2754 摘 要 PAGEREF _Toc2754 1 H