T梁结构旧桥拼宽受力分析

Analysis on Stress of T-beam Structure in Widening of Old Bridge

以某旧桥扩建项目为例,建立有限元模型,分析了已有T梁结构发生拼宽情况时,拼宽部分对老桥受力的影响,以及拼宽后桥梁整体的受力及稳定性能,指出拼宽后结构受力最不利的部分、可能发生脱空的支座位置,并对其成因进行了简单分析。最后提出相应的建议以保证结构安全,为以后类似的项目提供借鉴。

Taking an existing bridge extension project as an example,this paper analyzes the influence of the widened part on the stress of old bridge when the existing T-beam structure is widened by the establishment of the finite element model,and the stress and stability of the whole bridge after widened.This paper points out the most unfavorable part of the structure and the position of the support possibly happening to empty after widened,briefly analyzes the causes,and finally puts forward the relative proposal to guarantee the structure safety,which can be referred for the similar projects.