黔江大桥设计（50+80+50连续刚构桥）
毕业论文关键词：预应力；连续刚构；预应力筋
Qianjiang Bridge design (50 +80 +50 continuous rigid frame bridge)
Abstract：The design is a three-span of 50 +80 +50 continuous rigid frame bridge, Abutments at both ends, Middle of the bridge pier are 35m high. Two-way four-lane (no sidewalk), a total length of 180 meters, 19 meters wide, Design load for the highway-I. This design uses a "Dr.bridge" analysis software for structural analysis and calculation of internal forces. Also uses Auto CAD, Excel and other software designed to assist accomplish this. Throughout the design process, upper structure is pided into a total of 70 units, the lower structure total 14 units and 2 virtual block unit, another definition has 46 construction phase. Cross Close first performed, and then the cross-fold. In accordance with the requirements of the mission statement, after making finished modeling, we calculate the internal force structure, and to estimate the number of beams required for prestressing tendons, then the formula to calculate tendons, checking and layout. After doing calculations, we will draw the main structure of the construction plans, including tendons detail, box girder cross-sectional view, the whole bridge diagrams, finally, finishing the document.
Keywords： prestressed；continuous rigid frame,；tendons
目 录
1 绪论 1
1.1 设计目的和意义 1
1.2 桥梁的种类及连续刚构桥的优缺点 1
1.2.1 桥梁的种类 1
1.2.2 连续刚构桥的优缺点 1
1.3 连续刚构桥国内外的研究 2
1.4 刚构桥在我国的发展趋势 2
2 桥垮总体布置及结构主要尺寸 3
2.1 设计资料、技术指标及材料规格 3
2.1.1 设计资料 3
2.1.2 技术指标及材料规格 3
2.2 桥型布置就孔径划分 3
2.3 桥面布置 4
2.4 截面形式及尺寸拟定 4
2.4.1 截面形式 4
2.4.2 立面形式 5
2.4.3 主梁高度 5
2.4.4 腹板厚度 6
2.5 整桥的分段 6
3 建模及作用内力计算 6
3.1 项目总体信息输入 6
3.2 单元特征信息输入 6
3.3 施工信息输入 8
3.4 使用阶段信息输入 8
3.4.1 荷载集度计算 8
3.4.2 冲击系数计算 9
3.4.3 荷载效应组合 10
3.5 内力计算 11
4 预应力筋的估算与配置 14
4.1 预应力筋的估算 14
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