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Abstract: Bridge design has evolved significantly due to increasing spans, necessitating efficient and economical configurations. Cable stayed and suspension bridges are commonly used for long spans, while box girder bridges are suitable for medium and long spans due to their superior flexural and torsional behavior. However, analyzing box girder bridges is challenging due to various structural actions, but judicious selection of preliminary sections can reduce computational effort. This study examines single and double cell curved prestressed Box Girder Bridges under various loads, including class-AA load, class A vehicle load, and prestressed load with variable angle of curvature. The LSM method is adopted instead of working stress method, and numerical models are analyzed using commercially available software (MIDAS Civil). Compared with all the cases, it can be stated that when a bridge is curved in plan, double cell box girder bridges are more effective than single cell box girder bridges. Comparing 120 , 150 and 180 curvatures, the 150 curvature is the most appropriate for the length of 36m simply supported girder.
Shaik Irfan (Tue,) studied this question.