摘要
为了分析预应力对连续刚构桥箱梁的受力影响,采用有限元方法,建立杆系模型和实体模型,引入箱梁剪力滞系数λ,分析了预应力对箱梁剪力滞效应的影响。结果表明,预应力会放大箱梁剪力滞效应的作用,它的空间布置形式对结构计算结果具有显著影响,简单的箱梁桥杆系模型难以反映结构的真实受力情况,建议在设计过程中采用合理的计算模型,得到符合工程实际的计算结果。
To analyze the influence of prestress on the continuous rigid frame bridge girder,the finite element method is used to establish the bar model and the solid model,and the shear lag coefficient λ of box girder is introduced to analyze the influence of prestress on the shear lag effect of box girder. The result shows that the prestress will amplify the shear lag effect of the box girder,and its spatial arrangement has a significant impact on the structural calculation. The simple box girder bridge model is difficult to reflect the real stress of the structure. It is recommended in the design process that a reasonable calculation model is used to obtain the calculation results in accordance with the actual project.
出处
《公路交通技术》
2018年第4期59-62,共4页
Technology of Highway and Transport
