Midas43+70+43米悬臂施工连续梁桥设计+图纸
毕业论文关键词： 连续梁；预应力钢筋；迈达斯
Design of 43+70+43m Continuous Beam Cantilever Construction
Abstract: This object is about the Continuous Beam Cantilever Construction Design, I design the beam by Midas, then add loads to simulate the bridge the real force conditions. After the calculation of a bridge with Pre-stressed, the overall force to analyze the situation of the bridge. Main beam internal forces, normal section bearing capacity, shear carrying capacity, section of the normal stress, oblique section principal tensile stress and principal stress need to be analyzed. Operators need to streamline the content must meet the requirements in order to illustrate this bridge is designed to meet the standards. After the step by step in order to complete the bridge simulation, my data are in line with the requirements. Main beam internal forces, normal section bearing capacity, shear carrying capacity, section of the normal stress, oblique section principal tensile stress and principal stress are both meeting the requirements, and show these results with the legend. The bridge reinforcement is draw out by cad software. The design of this topic I follow the specifications, the more completely finished.
Keywords: Continuous Beam; Pre-stressing Steel; Midas
目 录
1 绪论 1
2 截面拟定 4
2.1 主梁尺寸拟定 4
2.2 桥梁的主要材料 5
2.3 桥梁的移动荷载 5
3 内力计算 6
3.1 结构自重 8
3.2 梁单元荷载 9
3.3 移动荷载 9
3.4 温度荷载 13
3.4.1 整体升温 13
3.4.2 整体降温 15
3.4.3 温度梯度 17
3.5 荷载组合 19
4 预应力筋的设计和布置 23
4.1 预应力钢筋数目计算 23
4.2 预应力钢筋布置 24
5 主梁验算 29
5.1 主梁顶板应力验算 29
5.2 主梁挠度验算 31
6 连续梁桥悬臂施工过程 32
6.1 施工方法 32
6.2 施工挂篮 33
6.2.1 挂篮形式 33
6.2.2 挂篮的安装 35
7 结论 36
致 谢 37
参考文献 38
1 绪论
桥梁是“跨越障碍的通道”[1]，从桥梁的呈现到今天经过的历史发展和外观变化，它也渐渐的构成了各种各样的构造和不一样的受力系统，现在桥梁中最主要的形式有：组合体系桥、拱桥、悬索桥、梁桥以及钢架桥等吹冰大体系。虽然现在有这么多的桥梁种类，但是这些桥梁的形式我们都可以在古代找到他们相应的起源，从最开始的木头桥到后面提升了强度和跨度的圬工桥，这其中圬工桥的发展对桥梁整体的发展起到了非常大的推动作用。就好比隋朝时候的赵州桥，到今天已经经过了1400多年可是它却任然在我们面前屹立不倒，跟着时间的步伐新的构筑材料也不断地被发现和应用在桥梁结构上，新的动工方法和工艺也层见叠出，当今施工方法经常被使用的有：移动导梁逐孔拼装法、顶推法、先简支后连续、滑膜施工、现浇施工和梁体预制浮吊安装法等施工技术。