预应力溷凝土设计箱梁连续梁桥.doc

南京工业大学本科生毕业设计(论文) 摘 要 PAGE 32  PAGE 31 …………………..立交桥…..设计 摘 要 连续梁桥是工程上广泛使用的一种桥型,它不但具有可靠的强度,刚度及抗裂性,而且具有行车舒适平稳,养护工作量小,设计及施工经验成熟的特点。设计一座梁桥必须从桥跨布设,尺寸拟定,钢束布置以及施工方法等方面综合考虑,还要充分考虑设计参数和环境影响。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。该设计首先进行恒载、活载及次内力的计算,在此基础上进行荷载组合,绘制弯矩和剪力包络图；其次,根据短期效应组合配置预应力钢筋，并进行预应力损失的计算；最后，对该连续梁桥进行验算，是否满足设计要求。 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 录 目 录 摘要………………………………………………………………………………………………I Abstract…………………………………………………………………………………… = 2 \* ROMAN II 第一章 方案设计……………………………………………………………………………1 1.1 跨径布置………………………………………………………………………………1 1.2 顺桥向设计……………………………………………………………………………1 1.3 横桥向设计……………………………………………………………………………2 第二章 恒载计算……………………………………………………………………………6 2.1节段划分及截面几何要素计算…………………………………………………………6 2.2 一期恒载计算…………………………………………………………………………9 2.3 二期恒载计算…………………………………………………………………………10 2.4