最新宁道高速公路瓢勺洞大桥施工图设计 毕业设计计算书.doc

宁道高速公路瓢勺洞大桥施工图设计_毕业设计计算书
宁道高速公路瓢勺洞大桥施工图设计
CHANGSHA UNIVERSITY OF SCne, that is 4 × 40m segments. primary using two separate beams, each width of meters by 6 T beam components. longitudinal deck 1% cross slope of 2%. use of prefabricated construction method hoisting. precast concrete T beam using C50; tendons are used (1 × 7 standard type) low relaxation strands this design includes the following sections: bridge scheme comparison; bridge-type layout, the structure size of each part intended; selecting computing structure diagram; dead load force calculation; live load force calculation; load combinations; reinforcement calculation; prestress loss calculation; sectional strength checking; sectional stress and deformation checking; construction design. design software with midas civil.
Key words: simply supported continuous; design; calculation; construction drawings; highway bridge
宁道高速公路瓢勺洞大桥施工图设计
宁道高速公路瓢勺洞大桥施工图设计
目 录
1设计说明 1
1
1
2 方案比选 4
4
4
4
4
7
7
结构尺寸拟定 8
9
9
11
3 内力计算及荷载组合 12
12
12
12
12
13
 midas 模型 14
15
19
22
26
支座沉降 30
宁道高速公路瓢勺洞大桥施工图设计
收缩与徐变 30
荷载组合 34
承载能力极限状态下的效应组合 34
正常使用极限状态下的效应组合 35
36
39
4 预应力钢束的估算及布置 40
 预应力钢束估算的原理与方法 40
40
按构件承载能力极限状态要求估算非预应力钢筋数量 41
42
42
43
预应力筋束的布置结果 44
本章小结 44
5 预应力筋损失 45
45
本章小结 46
6 强度验算 47
根本理论 47
计算公式 47
正截面抗弯验算 48
51
54
54
7 抗裂