基于温度循环迭代精确施加斜拉桥初始索力

为了准确施加斜拉桥的恒载初始索力,提出了一种基于ANSYS平台控制温度索力迭代施加的方法,从而精确施加斜拉桥初始成桥索力.以设计索力作为目标值,考虑斜拉桥几何非线性因素,初始索力以初始温度的形式施加到斜拉索上,运用APDL二次开发软件编制了斜拉桥成桥索力迭代计算程序,并将该程序应用于双塔双索面钢-混凝土叠合梁斜拉桥结构分析中.结果表明,桥塔两侧斜拉索的计算索力与目标索力误差均在5%以内,该初始索力迭代方法具有方便快捷和效率高的优点.

Precisely imposed initial cable force for cable stayed bridge based on temperature cycle iteration

In order to precisely impose the constant load initial cable force for cable stayed bridge, an iteration imposed method for cable force through controlling temperature based on the ANSYS platform was proposed, and thus the initial cable force of cable stayed bridge could be precisely applied at the completed stage of the bridge. The design cable force was taken as the target value, the geometric nonlinear factors of cable stayed bridge were considered, and the initial cable force was imposed to the cable stayed bridge in the form of initial temperature. The iterative calculation program for the cable force of cable stayed bridge at the completed stage was compiled with the APDL two-developed software, and the program was applied to the structure analysis of twin tower double cable plane steel-concrete composite girder cable stayed bridge. The results show that the errors of both calculated and target cable forces for the stayed cable on both sides of bridge tower are within 5%. Therefore, the iteration method for initial cable force has the advantages including the convenience and shortcut as well as high efficiency.