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采用Midas/Civil有限元软件建立某高速公路匝道桥有限元模型,计算结果表明:原桥梁设计设计合理;即使活载增大1倍,桥梁上部结构仍能满足承载能力极限状态要求,但部分截面开裂,裂缝宽度不满足正常使用极限状态;通过正常使用极限状态裂缝宽度反推活载可以看出,当活载增大到原设计活载的1.27倍时,9号墩顶最先达到正常使用极限状态,这说明桥梁检测中发现的裂缝有可能是由超载车辆引起;粘贴钢板、粘贴碳纤维两种加固方案均可行,综合两种加固方案的分析结果,粘贴钢板加固方案较为合理,在实际工程中采用粘贴钢板加固方案,加固以后结构承载能力有一定提高。
The finite element model of Midway / Civil finite element software is established by using Midas / Civil finite element software. The calculation results show that the design of the original bridge is reasonable. Even if the live load increases by one time, the superstructure of the bridge can still meet the ultimate bearing capacity requirements. However, Cracking and crack width do not satisfy the normal use limit state. Through the normal use of the limit state crack width reverse thrust live load can be seen, when the live load increased to 1.27 times the original design live load, the pier top 9 to reach the normal use The results show that the cracks detected in the bridge inspection may be caused by overloaded vehicles. Two reinforcement schemes of paste steel plate and carbon fiber paste are feasible. Based on the analysis results of the two reinforcement schemes, the steel plate reinforcement scheme is more reasonable. In actual engineering In the use of paste steel reinforcement program, after strengthening the structure carrying capacity has increased.