机构地区: 石家庄铁道学院交通运输学院交通工程系
出 处: 《石家庄铁道学院学报》 2002年第3期14-17,22,共5页
摘 要: 采用有约束的最小二乘法对施工阶段斜拉桥的索力进行调整 ,以主梁标高误差的平方和最小为目标函数 ,以结构的位移、弯矩及索力为约束 ,采用改进的分段线性同伦算法进行求解 ,通过调整体现各项误差重要性的权系数的大小 ,得到更符合工程实际的索力调整值。 This paper adopts the constrained least square method to adjust the cable force for cable-stayed bridge in construction stage. The objective function is to make the square sum of girder elevation errors least, and the constrains are the structural displacements, moments and cable force. The problem is solved by means of modified piecewise-linear homotopy algorithoms. The cable force adjustment value accordant to engineering practice will be attained by adjusting the biased weight coefficients which express importance of every item errors. At last, the calculation example proves that the method is true and practical.