连续刚构桥箱梁截面优化及结构性能比较分析

On sectional optimization of continuous rigid frame bridge's box girder and comparative analysis of structural performance

以连续刚构桥为研究对象,运用ANSYS软件的优化功能模块,提出了通过分节段优化进而达到全桥沿纵向优化的思路。在保证桥梁刚度和强度的条件下,通过对箱梁各部分厚度的优化,使得桥梁的总重量减少,同时对优化前后结构性能进行比较分析。证明桥梁设计时优选腹板顶、底板的合理比例是必要的,可提高结构性能,减少工程造价。

Taking the continuous rigid frame bridge as the research object,the study adopts the ANSYS software to optimize the functional model,points out the idea of achieving longitudinal optimization of the whole bridge by optimizing the sections,under the condition of guaranteeing bridge rigidity and strength,reduces the whole weight of the bridge by optimizing the thickness of all parts of the box girder,and undertakes the comparative analysis of the structural performance before and after the optimization,and proves the necessity for the reasonable ratio of the selection for web top and bottom slab,so as to improve the structural performance and reduce the engineering cost.