本次毕业设计过程中，需要借助Midas civil有限元软件辅助分析，

本次毕业设计过程中，需要借助Midas civil有限元软件辅助分析，由于悬臂施工过程中，桥梁存在多次的体系变化，故而需建立施工阶段对恒载进行分析。移动荷载采用ZH活载，以此建立荷载工况并求得活载内力，再通过软件分析计算出各控制截面的影响线和活载最不利位置布置图。定义支座沉降为1.5cm，并对支座沉降进行组合，对其求出沉降次内力。由于本次设计中不考虑温度影响。仅按主力进行荷载第一次组合，结合Midas分析结果，和规范中的公式进行预应力束的估算。接着定义预应力荷载得出预应力损失，最终建立完整的施工阶段和第二次荷载组合。利用规范和Midas分析结果对控制截面进行各项验算，以保证本次设计满足规范要求。

本次毕业设计过程中，需要借助Midas civil有限元软件辅助分析，由于悬臂施工过程中，桥梁存在多次的体系变化，故而需建立施工阶段对恒载进行分析。 移动荷载采用ZH活载，以此建立荷载工况并求得活载内力，再通过软件分析计算出各控制截面的影响线和活载最不利位置布置图。 定义支座沉降为1.5cm，并对支座沉降进行组合，对其求出沉降次内力。 由于本次设计中不考虑温度影响。 仅按主力进行荷载第一次组合，结合Midas分析结果，和规范中的公式进行预应力束的估算。 接着定义预应力荷载得出预应力损失，最终建立完整的施工阶段和第二次荷载组合。 利用规范和Midas分析结果对控制截面进行各项验算，以保证本次设计满足规范要求。

In the process of graduation design, Midas civil finite element software is needed to assist the analysis. Because there are many system changes in the cantilever construction process, it is necessary to establish the construction stage to analyze the dead load. The ZH live load is adopted for the moving load, so as to establish the load condition and obtain the internal force of the live load, and then the influence line of each control section and the layout of the most unfavorable position of the live load are calculated through the software analysis. The settlement of bearing is defined as 1.5cm, and the secondary internal force of settlement is calculated by combining the settlement of bearing. Because the temperature effect is not considered in this design. Only according to the first load combination of the main force, combined with Midas analysis results and the formula in the code, the prestressed tendon is estimated. Then define the prestress load to get the prestress loss, and finally establish the complete construction stage and the second load combination. The control section is checked with the code and Midas analysis results to ensure that the design meets the code requirements.<br>