宽幅单箱多室箱梁腹板剪应力计算分析

Calculation and analysis of web shear stress of wide single box multi chamber box girder

为了研究变截面单箱多室预应力钢筋混凝土箱梁腹板剪应力,通过有限元数值仿真与理论分析相结合的方法,针对一座单箱三室预应力钢筋混凝土箱梁桥进行研究。通过数据分析比较,考虑剪力流及截面参数变化的影响,提出适用于变截面单箱三室箱梁的剪应力计算公式,并利用该公式计算结果与有限元计算结果进行对比。结果表明,该公式计算结果与有限元分析结果吻合,可用于单箱多室腹板剪应力计算。

In order to study the web shear stress of variable section single box multi chamber prestressed reinforced concrete box girder,this paper studies a single box three chamber prestressed reinforced concrete box girder bridge through the combination of finite element numerical simulation and theoretical analysis.Through data analysis and comparison,considering the influence of shear flow and section parameters,a shear stress calculation formula suitable for variable section single box three compartment box girder is proposed.The calculation results of the formula are compared with the finite element calculation results.The results show that the calculation results of the formula are consistent with the finite element analysis results,and can be used for the shear stress calculation of single box multi compartment web.