超大悬臂双柱预应力钢筋混凝土盖梁力学分析

摘要:

为研究超大悬臂双柱预应力钢筋混凝土盖梁受力特性,分别采用桥梁博士V4建立梁单元模型和采用FEA NX建立实体模型进行计算分析。与实体模型相比,梁单元模型计算结果较为保守。墩柱横向宽度影响盖梁内力分布,盖梁在柱顶可考虑弯矩折减,以优化结构设计、节约工程造价。在梁单元模型中施加一对均布力和集中力进行简化计算。

Abstract:

In order to study the mechanical characteristics of super large cantilever double-column prestressed reinforced concrete cover beam, establishing beam element model by DoctorBridge V4 and solid model by FEA NX respectively for calculation and analysis. Compared with the solid model, the calculation results of the beam element model are more conservative. The transverse width of pier affects the internal force distribution of cover beam, the bending moment reduction of cover beam can be considered at the top of column to optimize structural design and save engineering cost. A pair of uniform and concentrated forces are applied to the beam element model for simplified calculation.