基于ANSYS的钢管混凝土拱桥吊杆二次张拉力确定

吊杆的张拉直接关系到系杆拱桥成桥后能否达到合理成桥状态，因此吊杆施工张拉力的确定是拱桥施工中的关键问题。首先运用正装迭代法模拟系杆拱桥吊杆的初张拉过程，得到施加二期恒载后各吊杆内力；然后运用影响矩阵法确定了吊杆二次张拉的控制力，以指导实际施工。基于大型分析软件ANSYS，提出了一种影响矩阵的简易求法。该方法概念明确，简单易行，对同类工程具有一定的参考价值。

Determination of Secondary Tension Force of Concrete filled Steel tube Arch Bridges Based on ANSYS

The stretching of hangers has direct bearings on whether tied arch bridges would reach rational dead load state or not, so the determination of the hangers construction tensioning force is a key problem in the construction of tied arch bridges.To solve this problem, firstly the forward analysis iterative method is applied to simulate the initial stretching process of hangers in this paper,then internal forces of hangers are got after applying the secondary dead loads. At last, the influence matrix method is used to determine the secondary control force of the hangers so as to guide practical construction. Based on the large analysis software ANSYS platform, a simple method for influence matrix is put forward. The concept of this method is clear and the process is simple. It can be used for reference in the similar engineering.