毕设基本摘要
摘要：本设计是根据设计任务书和桥规，设计预应力简支T梁桥，对结构进行内力计算和配筋。
桥梁跨径为25m，主梁为变截面T梁，梁高为1.7m。上部结构着重设计和计算预应力钢束的数量、布置、应力损失和主梁的截面几何特性，以及对主梁的截面承载力、应力、变形进行验算。运用比拟正交异性板法（G-M法）求横向分布系数。对下部结构的支座、盖梁、桩基进行计算和验算。
根据结构受力验算，该桥梁结构形式满足安全性、耐久性等要求。
关键词：预应力混凝土；简支T梁；横向分布系数
Abstract : In this paper, a concrete simple-supported T girder bridge is designed according to the assignement of project and the design specification. And the steel bar was arranged according to the calculation of internal force.
The span of the bridge is 25m. The superstructure is variable T girder, and the height of the T girder is 1.7m. For the superstructure, designing and calculating the amount, arrangement and the stress loss of the prestressed reinforcing steel bars, as well as the geometrical properties of the girders. Then checking the capacity, stress and deformation. Using the G-M theory to calculate the coefficient of transverse distribution. For the substructure, calculating and checking the steadier,bent cap and the stake.
Based on the checking procedure results, the structure type of the bridge meets the requriement of the bridge design of safety, durability and so on.
Key words: prestressed concrete; simple-supported T girder; coefficient of transverse distribution
设计跨径：25m
净空：4×3.5m＋2×0.5m
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