斜桥拼宽中受力状态的分析

Analysis of Stress Status in Widening Oblique Bridge

该文针对斜桥拓宽时新旧桥接缝处受力的复杂性,结合某高速公路上一座空心板桥梁,应用空间有限元方法,分析了横向采用铰缝连接时,拼接前后汽车荷载作用下新旧桥弯矩、支反力,以及拼接结构的横向受力情况,并提出对不利受力状态的改善方法,为同类型的拼宽设计带来借鉴和参考。

In the light of the stress complexity at the joint of the new bridge with the old bridge when an oblique bridge is widened,combined with a hollow plate bridge of an expressway,the article applies the space finite element method to analyze the bending moment,supporting force and transverse stress of splicing structure of the new bridge with the old bridge by hinged seam under the action of vehicle load before and after splicing,and puts forward the improvement method for the disadvantaged stress status,which can be referred for the same type of splicing design.