铁道科学与工程学报2018，Vol.15Issue(1)：133-140,8.
大跨径混凝土斜拉桥线形优化预测研究
Study on predication of line optimization of large-span concrete cable-stayed bridges
摘要
Abstract
The large-span concrete cable-stayed bridge has rather complex construction procedure. It is affected by non-linear factors such as cable sag, temperature variation as well as shrinkage and creep of concrete etc in the construction process, which then leads to relatively large error of setting of formwork erection elevation. In this case, the ideal completed bridge state can hardly be achieved. In order to guarantee accurate bridge line and balanced structure stress, factors influencing the formwork placing elevation of construction are analyzed comprehensively. A predictive model of the modified value of formwork placing elevation based on the PSO-BP neural network is established, so as to predict the modified value of the formwork placing elevation. The simulation results indicated that the established model with stable performance has very good predication and generalization abilities. Lines obtained from forecasted results were closer to ideal completed bridge lines. The main girder structure with reasonable stress achieved favorable completed bridge state, which also provides certain reference for line optimization methods of cable-stayed bridges.关键词
立模标高/斜拉桥施工/粒子群算法/神经网络/线形优化Key words
formwork placing elevation/cable-stayed bridge construction/particle swarm optimization/neural network/line optimization分类
交通工程引用本文复制引用
于景飞,吴炎奎,苏醒..大跨径混凝土斜拉桥线形优化预测研究[J].铁道科学与工程学报,2018,15(1):133-140,8.基金项目
内蒙古自治区自然科学基金资助项目(2016MS0723) （2016MS0723）
