预应力混凝土连续梁桥施工设计毕业论文

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1、预应力混凝土连续梁桥施工设计毕业论文目录第一章概述·····························41.1地质条件···························41.2主要技术指标·························41.3设计规范及标准························4第二章方案比选······························52.1概述·····························52.2比选原则··········

2、·················52.3比选方案···························52.3.1预应力混凝土连续梁桥··················52.3.2预应力混凝土连续刚桥桥·················72.3.3普通上承式拱桥·····················82.4方案比较···························9第三章预应力混凝土连续梁桥总体布置·················123.1桥型布置·················

3、··········123.2桥孔布置···························123.3桥梁上部结构尺寸拟定·····················123.4桥梁下部结构尺寸拟定·····················133.5本桥使用材料·························143.6毛界面几何特性计算······················14第四章荷载内力计算·························164.1模型简介···············

4、············164.2全桥结构单元的划分······················164.2.1划分单元原则······················164.2.2桥梁具体单元划分····················17924.3全桥施工节段的划分······················174.3.1桥梁划分施工分段原则··················174.3.2施工分段划分······················174.4恒载、活载内力计算··········

5、············174.4.1恒载内力计算······················174.4.2悬臂浇筑阶段内力····················184.4.3边跨合龙阶段内力····················194.4.4中跨合龙阶段内力····················204.4.5活载内力计算······················214.5其他因素引起的内力计算····················234.5.1温度引起的内力计算···········

6、········234.5.2支座沉降引起的内力计算·················254.5.3收缩、徐变引起的内力计算················264.6内力组合···························284.6.1正常使用极限状态的内力组合···············284.6.2承载能力极限状态的内力组合···············29第五章预应力钢束的估算与布置····················325.1钢束估算·····················

7、······325.1.1按承载能力极限计算时满足正截面强度要求·········325.1.2按正常使用极限状态的应力要求计算············335.2预应力钢束布置························395.3预应力损失计算························405.3.1预应力与管道壁间摩擦引起的应力损失···········405.3.2锚具变形、钢筋回缩和接缝压缩引起的应力损失········415.3.3混凝土的弹性压缩引起的应力损失·········

8、····415.3.4钢筋松弛引起的应力损失·················425.3.5混凝土收缩徐变引起的应力损失··············425.3.6有效预应力计算·····················445.4预应力计算··························45第六章强度验算···························486.1正截面承载能力验算······················486.2斜截面承载能力验算···················