大悬臂预应力混凝土盖梁计算分析

Computational Analysis of Great Cantilever Pre-stressed Concrete Cover Beams

城市桥梁建设中,为提高土地利用率,大悬臂预应力混凝土盖梁往往成为优选方案。结合某工程实例,介绍大悬臂预应力混凝土盖梁的设计思路和设计方法。计算结果表明,墩柱与盖梁连接处结构受力复杂,多为结构设计的控制性截面;结构计算时应准确模拟盖梁施工过程,合理选择预应力钢束张拉顺序和张拉时机,保证施工过程结构安全。

Issue on land saving to improve land utilization rate during the urban bridge construction,the great pre-stressed concrete cover beam always becomes the optimum scheme.Combined with practical work,the design idea and method of great pre-stressed concrete cover beam are described in detail,the results of the calculation demonstrate that the connection location between pier column and cover beam is the design control section in most cases;and in order to ensure the structural safety of the construction process,the construction process of the cover beam should be accurately simulated and the tension sequence of pre-stressed tendons should be reasonably chosen.