关键词: 大宁河大桥, 拱肋安装, 优化数学模型, 罚系数, 倒拆修正法, 扣索索力, 预抬量

Abstract: Taking Da-ning River Bridge in construction as the engineering background, the optimization analysis of cable forces and segmental cambers has been carried out during the process of arch rib segmental installment. A modified inverted mcthod including cable force penalty factor is put forward, a formula of calculating penalty factor is deduced, and a corresponding FEA model is established by ANSYS. The analytical result shows that this method is of high accuracy, and the restilts of this method are in good accordance with those got in practice.

Key words: Da-ning River Bridge , arch rib installation , OPT mathematical model , penalty factor , modified inverted method , cable force , segmental camber ;