双悬臂L型预应力混凝土盖梁受力特点及配束方法

Stress Characteristics and Tendon Layout Methods of Double-cantilever L-shaped Prestressed Concrete Bent Cap

摘要:

以上海市大叶公路奉贤段改建工程中L型高低盖梁为背景，提出了2种可行的L型盖梁的钢束配置方法，并分析了盖梁在2种配束方式下的受力特点。提出了横向不对称钢束配置方案的优化方法及施工阶段的钢束张拉顺序布置方法，通过对比分析盖梁实体有限元模型和梁单元模型下的计算结果，提出了2种分析模型在工程设计中的使用建议

Abstract:

Based on the L-shaped high and low bent caps in Shanghai Daye Highway Fengxian Section Reconstruction Project, two feasible tendon layout methods for L-shaped bent cap are proposed, and the stress characteristics of the bent cap under two tendon layout methods are analyzed. The optimization method of the transverse asymmetric steel tendon layout scheme and the tension sequence layout method of steel tendons in construction stage are proposed. The calculation results of the bent cap beam under the solid finite element model and the beam element model are compared and analyzed. The using suggestions of two analysis models in the engineering design are proposed.