钢壳混凝土加固箱梁翼缘横向受力分析

Lateral Force Analysis of the Flange of the Steel-shell Concrete Reinforced Box Girder

某高速公路预应力混凝土连续箱梁新增门架式标志,为保证其结构受力安全,采用钢壳混凝土肋对箱梁翼缘进行加固。文章建立三维有限元模型,对新增门架荷载前后箱梁翼缘的横向受力进行分析,计算结果表明新增门架后箱梁横向抗裂满足A类预应力构件要求,研究可为同类桥梁新增标志的翼缘加固设计提供参考。

The gantry sign is newly added on the prestressed concrete continuous box girder of an expressway,so as to ensure the structural stress safety.The steel-shell concrete rib is used to strengthen the flange of the box girder.The lateral force analysis of the flange of the box girder before and after the new gantry load is made by establishing the three-dimensional finite element model,and the calculation result shows that the lateral crack resistance of the box girder after the newly-added gantry meets the requirement of Class A prestressed member.The research can provide reference for the flange reinforcement design of the newly-added sign of similar bridges.