STATIC AND DYNAMIC ANALYSIS OF RCC T–BEAM BRIDGE WITH VARYING SPAN LENGTH AND SPEED OF VEHICLE

Abstract

Structures generally have two load kinds, i.e. static load and dynamic load. While most structures are built on the premise that all the loads given to the buildings are static and the dynamic load impact is ignored. But sometimes the reason for the catastrophe may be this characteristic of ignoring dynamic loads. Thus, for a different span of the bridge and different speed of the moving vehicle on the bridge deck, dynamic bridge deck analysis is planned.

In this study, the modeling of a T-beam deck slab bridge is done using CSiBridge. The static response of the T-beam deck slab bridge due to IRC Class 70R loading at one instant of time on bridge deck using CSiBridge has been calculated. The free vibrational characteristics of the T-beam deck slab bridge by determining the mode shapes and frequencies using CSiBridge has been carried out to find out the influence of span length on frequencies of the bridge. Further studied the dynamic analysis of T-beam deck slab bridge with emphasis on the evaluation of the dynamic response of bridge deck due to time-varying moving vehicle load is performed and the time-varying displacement and stresses were obtained. At last, the influence of factors like span length and vehicle speed on the T-beam deck slab bridge has been studied.