不同梁格划分在连续箱梁桥建模分析研究

The Analysis and Research of Different Beam-grid Division in the Continuous Box Beam Bridge Modeling

为研究不同梁格划分方式对箱型截面结构内力的影响,以陕西某三跨连续小箱梁桥为依托工程,基于梁格法的基本理论和通用有限元软件,在已有传统梁格划分基础上,提出一种τ型梁格划分的方法。结果表明,在不同工况下,两种建模方法计算结构内力变化相差不大,其中竖向位移最大值相差4%;正应力最大值相差11%,满足工程要求,研究结果将为连续小箱梁桥计算分析提供参考。

To study the influence of different beam-grid division patterns on the box section structure internal force, based on a small three span continuous box beam bridge in Shaanxi Province, and the basic theory of grillage method and general finite element software, this paper put forward a τ-type beam-grid division method on the basis of the existing traditional beam-grid division.