摘要此次毕业设计我的任务是设计一座小跨度预应力混凝土连续箱梁桥,由于时间和能力的原因,我只需要设计上部构造。预应力混凝土连续梁桥凭借其自身的结构受力性能好、桥面变形小等优点成为设计人员设计一座桥梁时优先选择的桥型之一。此次毕业设计中的桥梁纵向五跨,每跨跨径35m,总长175m,横向四片梁,主梁截面采用预制的箱梁。在设计中只考虑半面路基,所以路基形式采用分离式路基。预制箱梁法为此次设计中的施工方法。40969
上部构造的计算设定为箱梁截面,把5×35m跨径分成若干个详细的单元,计算梁桥恒载和活载内力,全桥采用有限元分析软件MIDAS 对其进行预应力筋束的配筋和应力验算,并且根据交通部的规范对预应力损失进行计算。
毕业论文关键词: 预应力混凝土 连续梁桥 预制箱梁法
Abstract
My task is to design a small span prestressed concrete continuous box girder bridges, because of the time and the ability of the reason, I only need to design the superstructure.Prestressed concrete continuous beam bridge by virtue of its own structure stress performance, deck deformation advantages such as small as one type of designers to design a bridge priority.The graduation project in the bridge of five spans, each span length 35m, length 175m, four transverse beam, the main beam section using prefabricated box beam.In the design, only half of the subgrade is considered.Precast box beam method for the design of the construction method.
Calculation of the upper structure of the set is a box girder section, the 5 * 35m span is pided into a plurality of detailed unit, the calculation of beam Hashi Kozai and live load force, full bridge using finite element analysis software MIDAS the for reinforcement of prestressed beam and stress calculation, and according to the norms of the Ministry of communications of prestress loss calculation.
Keywords: prestressed concrete continuous girder bridge Precast box girder
目录
1.绪论 7
1.1 预应力混凝土连续梁桥的概述 7
1.2毕业设计目的及意义 8
2.设计的资料 9
2.1 桥梁简介 9
2.2 设计参数 9
2.3 技术条件 9
2.4设计要求 9
2.5规范标准 10
3.桥跨布置以及制定截面结构尺寸 11
3.1 本桥主料材料 11
3.1.1 主梁混凝土 11
3.1.2预应力钢筋 11
3.2尺寸拟定 12
3.3 桥孔分跨 14
3.4 截面形式 14
3.4.1 立截面 14
3.4.2 横截面 14
3.4.3典型横断面 15
3.5梁高 15
3.6截面尺寸 16
4.荷载计算 20
4.1恒载内力 20
4.2主梁分段与施工方式 20
4.2.1分段原则 20
4.2.2主梁的施工方式 20
4.3模型计算 20
4.3.1截面特性 20
4.3.2 荷载工况及荷载组合 22
4.3.2.1自重 22
4.3.2.2徐变收缩 22
4.3.2.3支座沉降 23
4.3.2.4可变荷载 23
4.3.2.5荷载工况 23
4.3.3构件在各阶段恒荷载作用下的位移 24
4.3.4构件在各阶段恒荷载作用下的弯矩 25
4.3.5构件在各阶段恒荷载作用下的剪力 26 小跨度预应力混凝土连续箱梁桥鄂州港口大桥设计+图纸:http://www.751com.cn/gongcheng/lunwen_40856.html