A Review on Comparative Analysis and Design of RCC Skew Bridge and Steel Skew Bridge with Variation in Angle

Bridges form an integral part in a highway or railway network. When the geometry can’t accommodate straight bridges, skewed bridges are often encountered in highway design. In spite of the fact that majority of bridges in this country are skewed in plan form few methods of analysis exist for such structure. Skew bridges are required to cross the drains at any angle other than normal. These can be helpful in making straight crossing or utilizing the available land where normal crossing are either impossible or not suitable. The slab bridges are uneconomical for large spans due to excessive design thickness but good for small spans due to its easy execution. The paper aims to adopt an efficient analysis technique for the analysis of various skew decks. To begin with different methods have been explored to determine the exact and approxiearch work has been reported in the literature on the analysis of skew bridges under different load combinations. However less attention have been paid for exploration of suitable analysis technique for highly skewed decks. Since bridges are an important structural element today, efficient methodology to accurately predict the behaviour of skew bridges assume importance. In brief the study includes the behaviour of skew slab bridges with respect support reaction and deflection of the slab under standard IRC 70R wheeled loading is presented. The modeling of the slab is done by using Staad.Pro software. It was found that high –ve reaction occurs at obtuse angled corner for skew angles above 60°, the maximum deflection approaches towards the obtuse angled corner with increase in skew angle and aspect ratio.