T型梁桥结构计算毕业设计论文

摘要

目前，为适应我国经济的发展，预应力混凝土被更广泛的应用，以此缓解交通给人们生产生活带来的不便。根据安全、适用、经济、美观的桥梁设计原则，并在施工、造价等方面对装配式预应力混凝土简支T梁桥、预应力混凝土空心板连续梁桥及装配式箱型梁桥三种梁桥形式进行了比选，从而确定了预应力混凝土简支T梁桥为设计方案。在本次梁桥方案设计中，着重对预应力混凝土简支T梁桥资料设计、构造的布置、方案绘图、结构计算进行了全面的介绍。结构计算包括对横截面主要尺寸的拟定、可变作用效应计算、预应力损失值估算、持久状况承载能力极限状态承载力验算、主梁变形计算还有行车板道的计算。本设计依据当地环境的影响、人们的需求，道路的建设等方面的综合考虑，进行了大桥的总体布局及桥梁的设计与计算，而预应力混凝土简支T梁桥恰好的具备了适用性强，就地取材，耐久性好，美观的各种优点。桥梁是城市道路的重要组成部分，对当地政治、经济、文化、国防等意义重大，加上其施工充分技术的先进性，预应力混凝土简支T梁桥将给城市增色不少。而今，又由于材料性能的不断改进，设计理论革新创造，施工工艺日趋完善，使得预应力混凝土简支T梁桥地位日益重要，本设计根据各方面条件，确定桥型为预应力混凝土T型梁桥。

关键词：预应力混凝土; T型梁桥; 结构计算；设计方案

Abstract

At present, in order to adapt to the economic development of China, the prestressed concrete is more widely used, in order to ease traffic production and living of inconvenience to the people. According to the safe, applicable, economic, beautiful bridge design principles, and in such aspects as construction, the construction cost of prefabricated prestressed concrete simply supported T beam bridge, prestressed concrete hollow slab continuous girder bridge and prefabricated box girder bridge three bridge form has carried on the comparison, thus determine the prestressed concrete simply supported T beam bridge design. In the bridge design, design of prestressed concrete simply supported T beam bridge data, structure layout, plan drawing, structural calculation has carried on the comprehensive introduction. Structural calculation including the main dimensions of cross-section, variable effect calculation, loss of prestress value estimation and lasting condition bearing capacity limit state of bearing capacity calculation, calculation and driving plate girder deformation calculation. This design according to the local environment, people's demand, the influence of road construction and other aspects of the comprehensive consideration, the bridge of the overall layout and the design and calculation of the bridge, and prestressed concrete simply supported T beam bridge just have strong applicability, local materials, good durability, various advantages, beautiful. Bridge is an important part of city road, to the local political, economic, cultural, national defense and so on is of great significance, and its construction technology of advanced fully, prestressed concrete simply supported T beam bridge will give city graces many. Now, due to the constant improvement of the material performance, innovation creates design theory, construction technology is increasingly perfect, make prestressed concrete simply supported T beam bridge position is becoming more and more important.

Key words: prestressed concrete; T girder bridge; structural calculation; design scheme