文档介绍：胜利一桥设计
交通土建系道路与桥梁工程王# #
指导老师:# # #
摘要: 根据设计任务要求,依据现行公路桥梁设计规范,综合考虑胜利一桥的地质、地形条件,主桥选用预应力混凝土三跨连续梁桥,跨径组合为70m+110m+70m,两边引桥采用30m标准跨径的后张法预制预应力混凝土简支T梁桥。本设计主要对主桥进行了内力计算、控制截面抗弯配筋计算及变形验算。对引桥进行了内力、配筋计算、预应力损失计算、强度验算、使用阶段裂缝宽度验算和变形验算。最后对主桥和引桥的基础进行单桩承载力计算与桩身强度验算。结果表明,胜利一桥设计合理,达到了设计任务的基本要求。
关键词: 预应力;连续梁桥;简支T梁;下部结构。
Abstract: According to the design assignment and the present Highway Bridge Specifications, take the geology of of First Victorious River Bridge and topographical condition for further analysis, the main bridge of Victorious River Bridge adopted the PC continuous beam-type bridge with three spans of 70+110+70m, while the approach bridge adopted posttensioning method of precast simple-supported PC T-beam bridge with a span of 30m. Regarding the main bridge, the internal force, the disposition of prestress steel and the deflection at the main cross-section are studied in brief. In the meantime, as to the approach bridge, strength intensity, disposition of prestress steel, the lost of prestress force, and the deflection of the service stage are calculated. Lastly, the capacity and the strength of the pile are analyzed. The result indidcated that the design is fit the need of the design task.
Key words: prestress force;continuous PC beam bridge;simple-supported PC T-beam bridge;substructure .
目录
前言 1
1 概述 2
设计任务和主要内容 2
设计规范和标准 2
主要技术指标和设计资料 2
2 方案比选 4
方案初拟 4
连续梁桥 4
连续刚构桥 5
方案比选 6
3 主桥上部结构设计 7
材料选定 7
主跨径拟定 7
主桥立面布置 8
截面尺寸拟定 8
主桥建模分析 9
控制截面内力计算 11
预应力钢束的估算与布置 11
主桥控制截面配筋及承载能力极限状态验算 13
主跨跨中截面配筋及正截面承载力验算 13
主跨L/4截面配筋及正截面承载力验算 14
主跨L/8截面配筋及正截面承载力验算 18
主跨支点截面配筋及正截面承载力验算 19
边跨L/8截面配筋及正截面承载力验算 21
边跨L/4截面配筋及正截面承载力验算 22
边跨L/2截面配筋及正截面承载力验算 24
边跨3L/4截面配筋及正截面承载力验算 26
边跨7L/8截面配筋及正截面承载力验算 27
主桥变形验算 29
4 主桥下部结构设计 30
设计资料及方案选定 30
地质及水文资料 30
主桥结构荷载 30
基础方案选定 31
桩基础内力计算及桩顶位移验算 32
桩的计算宽度 32
桩的变形