Modelling and comparative live load analysis of skewed deck precast concrete bridge

Abstract

This Study introduce a precast concrete bridge deck. The overall length of the bridge is 20.665 m and the effective span is 19.355 m with 370 skews over both the abutment. This bridge is fully integral single span structure which carries 2 lanes of carriageway and footway on either side for pedestrian. This superstructure is consisted of 11 number of MY7 prestressed beam and 2 number of MYE7 beams. At the end of both verge parapet has been provided as vehicle restraint. The bridge deck superstructure and RC abutment will be supported on pile foundation. We are assuming that one river watercourse is running under the bridge and permitted traffic speed over the bridge will be 30mph. This structure will be modelled & analyzed by the help of a commercially available finite element software LUSAS. The structure will be analyzed in 3 different stages according to construction sequence. The deck of this bridge will be modelled as a grillage of beam member analyzed elastically under design load. The main aim of this study is to determine deflection, the shear force and maximum bending moment on the bridge deck due to the different type of loading condition. Characteristic dead load superimposed dead load and live load will be statistically distributed onto the elements of the structural model. Wind action, Thermal action, Creep and Shrinkage action will be determined in accordance with Euro and British standard code. All the load combination and analysis has been carried out in accordance with Euro and British Standard code.