Analytical Method and Experimental Verification of Prestressing for S-shaped Curved Girder Bridges
The torque and stress changes caused by prestressing in complex prestressed concrete curved box girder bridge structures are worth studying.The existence of prestress effect,on the one hand,improves the compressive stress reserve of the main girder and enhances the bearing capacity of the structure,on the other hand,it increases the curvature of the main girder,resulting in difficulty in structural analysis.Taking a small radius S-shaped curved box girder bridge in Shuifu,Yunnan Prov-ince as an example,a prestressed analysis method for complex curved girder bridges considering the influence of curvature was proposed,and the prestress effect of the complex curved bridge was ana-lyzed based on the prestressed equivalent load theory of curved girder.The correctness of this method was demonstrated through numerical analysis and actual measurement data related to the construction process.The results indicate that the proposed analysis method is reasonable and particularly suitable for stress analysis during the construction process of small radius S-shaped curve continuous girder bridges.
curved girderprestress effectfinite element modelbridge construction monitoringtest verification
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