【毕业论文】预应力混凝土连续梁桥设计.doc

…………………..立交桥…..设计摘要本设计是一联五跨连续梁桥，截面形式为单箱双室，纵向变截面；施工方式是满堂支架整体现浇。关键词：设计 连续梁桥 满堂支架 预应力 Design for ………………………Bridge Abstract The continuous beam bridge is a kind of bridge type used widely on the project. It not only has a reliable strength, stiffness and cracking, but also has a smooth journey comfortable, conservation work on the design and construction experience of the characteristics of maturity. Design a bridge must be laid across from the bridge-laying, the size of the development, steel beam layout and construction methods, but also give full consideration to the design parameters and environmental impact. This is a design for a five-span continuous bridge, whose cross-section is two-compartment, and changing on the road direction, constructed by pouring on-site on full framing. The first design includes constant load, the live load and the calculation of the internal forces. On the basis of a load combination, we can draw moment and shear envelope map. Next, according to the short-term effect combination disposition prestressed reinforcement, and carries on the loss of prestress the computation. Finally, carries on the checking calculation to this continuous bridge, whether to satisfy the design requirements. Key Words: design; continuous bridge; full framing; prestress 目 摘要………………………………………………………………………………………………I A……………………………………………………………………………………II 第一章 方案设计……………………………………………………………………………1 1.1 跨径布置………………………………………………………………………………1 1.2 顺桥向设计……………………………………………………………………………1.3 横桥向设计…………………………………………………………………………………………………………………………………………………………6 2.1节段划分及截面几何要素计算…………………………………………………………2.2 一期恒载计算…………………………………………………………………………2.3 二期恒载计算…………………………………………………………………………12.4 总恒载效应……………………………………………………………………………1第三章 活载计算……………………………………………………………………………13.1 汽车荷载………………………………………………………………………………13.2 最大、最小弯矩及其对应的剪力计算………………………………………………13.3 最大、最小剪力及其对应的弯矩计算………………………………………………第四章 次内力计算…………………………………………………………………………2 4.1 温度次内力计算………………………………………………………………………2 4.2 支座沉降次内力计算………………………………………………………………… 第五章 内力组合及内