斜拉桥初应变增量索力调整

Cable Force Adjustment of Cable-stayed Bridge

利用拉索变形与应变的关系，建立了初应变增量调整方程．采用迭代方法，求得满足要求的斜拉桥拉索应力．经工程算例验证，此调索方法收敛速度快．其等效于位移调零法或最小主梁弯矩应变能法，适用于有限元调索计算．

The initial strain increment equations is formulated thagh displacement-strain relationship of cables. The applicable cable foroes can be calculated by iteraive method. An example is presented to il-lustrate the process and efficiency of the method. The method is equivalent to zero displacement or mini-mum strain energy of main girder and is easy to be applied in FEA software.