连续梁预应力张拉方式改变引起应力损失及对策

Stress loss and countermeasures of continuous beam owing to prestressed tension methods

以某铁路工程为例,研究了梁宽端预应力单端张拉对结构应力、变形的影响,提出了增加宽侧边跨底板纵向钢束数量、启用备用束、超张拉等处理方法,并分析了其处理效果,以供参考。

Taking the railway engineering as an example, the paper studies the impact of beam one-end prestress loss upon structural stress and deformation, puts forward processing methods of increasing vertical steel bundle quantity of wide side crossing-board, using reserved bundle and extra tensioning and so on, and finally analyzes its processing effect, with a view to provide some guidance.