摘要
纵向预应力对箱梁的作用本质上与轴向力存在着密切的关系,为研究轴向力及预应力作用下箱梁剪力滞效应及箱梁剪力滞的变化规律,基于剪力滞效应的原理,指出轴向力及纵向预应力作用下箱梁将产生剪力滞效应,运用有限元软件ANSYS对薄壁箱梁剪力滞效应影响进行数值分析,得到并总结剪力滞效应沿梁纵向分布的规律,可以为工程实践提供一定参考。
The impact of longitudinal prestress on box girder is closely related to axial force essentially. In order to study the change rule of shear - lag effect of box girder and shear lag of box girder under the impact of axial force and prestress, based on the principle of shear - lag effect, the shear - lag effect of box girder under the impact of axial force and longitudinal prestress is pointed out, the numerical analysis on the impact of shear - lag effect on thin - wall box girder is made by utilizing finite element software ANSYS, and the rule that the shear - lag effect should be distributed along the longitudinal direction is obtained and summarized, so as to provide certain reference for engineering practice.
出处
《北方交通》
2017年第3期38-42,共5页
Northern Communications
关键词
箱梁
纵向预应力
轴向力
剪力滞效应
有限元分析
Box girder
Longitudinal prestress
Axial force
Shear-lag effect
Finite element analysis
