文档介绍：三跨预应力连续梁桥设计
摘要
在本设计中,根据地形图和任务书要求,依据现行公路桥梁设计规范提出了预应力混凝土连续梁桥、预应力混凝土连续刚构桥、梁拱组合体系桥三种桥型方案。按照“实用、经济、安全、美观”的设计原则,经过对各种桥型的比选,最终选择60m+90m+60m的预应力混凝土连续梁桥为本次的推荐设计桥型。
本设计利用MIDAS软件进行结构分析,根据桥梁的尺寸拟定建立桥梁基本模型,然后进行内力分析,计算配筋结果,进行施工各阶段分析及截面验算。同时,必须要考虑混凝土收缩、徐变此内力和温度次内力等因素的影响。
最后,经过分析验算表明该设计计算方法正确,内力分布合理,符合设计任务要求。
关键字:比选方案;连续梁桥;连续刚构;拱桥;预应力钢筋;截面验算
The design of the three span prestressed continuousgirder bridge
ABSTRACT
In this design, according to the topography ,and project requirements, according to the current highway bridge design specification of prestressed concrete continuous girder bridge forward, prestressed concrete continuous rigid-frame structure, girder and arch bridge. According to the “practical, beautiful, safe, economic and convenient” for construction of bridge design principle, structure after the bridge of various final choice of 60m+90m+60m prestressed concrete continuous girder bridge design for this mendation.
This design using the MIDSA software analysis the structure, according to the size of bridge, the basic model establishment bridge worked, then force analysis, calculation results of reinforced, for each phase analysis and construction. At the same time, must consider the concrete shrinkage, creep force times and temperature resultant times factors.
Finally, after analysis shows that design calculation method of calculation the internal distribution, reasonable, comply with the design requirements of the task.
KEY WORDS:selection scheme;continuous girder bridge;continuous rigid-frame structure;arch bridge;prestressing steel;putation
目录
1 概述 1
预应力混凝土连续梁桥概述 1
技术标准 4
地质条件 5
采用材料 6
采用规范 6
2 方案比选 7
构思宗旨 7
比选标准 7
设计方案 7
设计方案一 7
设计方案二 8
设计方案三 9
方案比选 10
方案确定 11
3 预应力混凝土连续梁桥总体布置 12
桥型布置 12
孔径布置 12
桥梁截面形式 13
桥梁细部尺寸 16
桥面铺装 18
桥梁下部结构 19
本桥使用材料 19
全桥结构单元的划分 19
划分单元原则 19
桥梁具体单元划分 20
全桥施工节段划分 20
桥梁划分施工分段原则 20
3