Comparative study of bridge configurations for dynamic analysis

Abstract

A bridge is a physical structure which carries roadway, pathway or a railway etc over the obstacles like a water body example a river, deep valley, a rail or a road. Today the bridges are diversified into Cable stayed bridge, Suspension Bridge, Arch Bridge, Box Girder Bridge, Solid Slab Bridge, Arch Bridge, Movable Bridge, Truss Bridge, Cantilever Bridge etc. The bridge design varies by many factors such as aesthetic appearance, its usage or functionality of the bridge, anchorage, terrain and topography where the bridge to be constructed, and economic factors or funds etc.The main objective of analyzing and design of bridges is to find the internal stresses, deflections, shear force, moments, deformation by the action of various loads and load effects. In the present context a cable stayed bridge, T-beam bridge and a truss bridge each of span 80 m is considered by modeling and analysis of the corresponding bridges subjected to dynamic load conditions by using SAP 2000.The deflections in the girder bridge are very less when compared to truss bridge and cable stayed bridge. The durability and reliability of girder bridge is high. The cable stayed bridge and truss bridge are susceptible for environmental effects like they are prone to corrosion.