Analysis of Integrated Skew Bridge for Seismic Loading

Bridges are the structures which are built over road, railway, etc for the purpose of providing passage over the obstacles. Bridges undergo expansion and contraction due to temperature changes which is the major concern. Here durability is the major design consideration. Routine inspection and maintenance is required. Bridges are classified based on material of construction, Function, form of superstructure, inter span relation, method of construction, span and type of service and duration of use. Integral bridges are built monolithically as one structure. They are also called as skew angled; integral abutment bridges, rigid frame bridges and joint less bridge. In integral bridges abutments are constructed integral with deck and girder. These bridges have no expansion joints and sliding bearings. As integral bridges provide greater redundancy they will be stiffer compared to the conventional bridges. The behaviour of 25m single span skew angled integral bridge is investigated with varying skew angle from 0 to 60 degree with0interval of 150degree Comparison between various loads like dead load, moving loads seismic loads by considering Zone II and loads combination like and UDICON (referring to IRC-6) for Bending moments, Time period and Base Shear. IRC class AA Vehicular load is considered for the study. From the results obtained we can conclude that the bending moment at mid and end span will be maximum for the bridge skewed for 60 degree angle.