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为使钢-混叠合梁斜拉桥索力得到最大程度的优化,利用ANSYS有限元软件对某实际工程进行建模、施加约束及荷载、求解等步骤之后,调用软件的优化分析模块,以主梁的弯曲应变能作为目标函数,各拉索索力作为设计变量,采用一阶分析法进行迭代优化,从而获得优化的拉索索力。分析结果表明:该优化方法是准确、有效的,可以用于叠合梁斜拉桥的索力优化;叠合梁斜拉桥优化后的各索索力及索力分布规律对同类型叠合梁斜拉桥达到合理成桥状态时的索力判定及调整具有一定的指导意义。
In order to optimize the cable force of the cable-stayed bridge, the finite element software of ANSYS is used to model an actual project, and after constraints, loads and solutions are applied, the software optimization analysis module is called The bending strain energy of the main girder is taken as the objective function, and the cable force of each cable is taken as the design variable. The first-order analysis method is used to optimize the cable tension so as to obtain the optimized cable force. The analysis results show that the optimization method is accurate and effective and can be applied to the cable force optimization of the cable-stayed bridge with composite girders. Cable-stayed bridge to achieve a reasonable state of the cable to determine and adjust the rope has a guiding significance.