简支t梁桥上部结构设计.doc

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Abstract
Concrete beam bridge because of its simple structure, clear force, convenient construction, is the preferred structure of middle and small span bridges. Prestressed concrete T beam is a kind of simply supported T beam bridge structure, with simple structure, definite stress, the advantages of material saving, simple construction, erection convenient installation, strong span ability, is now used in bridge construction more and more. In recent years, with the rapid development of China's highway construction, precast prestressed concrete T beam bridge has been widely used in highway construction in china.
This design is mainly the design and calculation of a bridge, the first scheme optimization, through different scheme pared to select the optimal design, a set of dimensions in the design process, according to the size of the design and calculation of internal force, the load bination; then the configuration of steel beam and position estimation, calculate the position of the center of gravity of steel beam and the length of group, after Zhang Lafa steel beam tension; then calculating geometric properties; calculation of prestress loss; calculation of beam through the above calculation, through various should force checking detection to ply with various requirements.
Key words: Prestressed, simply supported T beam, post tensioning method, the stress checking calculation
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目录
第一章引言1
　概述1
第二章主梁构造设计2
设计资料和构造布置2
原始数据资料2
设计的根本资料2
横截面的构造布置4
主梁横截面沿跨长的变化6
主梁横隔梁位置的布置7
主梁内力计算7
恒载计算7
活载计算10
主梁荷载作用的效应组合20
预应力钢束的估算及其位置22