DYNAMIC ANALYSIS OF CABLE STAYED BRIDGE

Abstract

The cable stayed bridges are increasingly becoming popular for longer spans. Cable stayed bridges are more sensitive to static wind effects and dynamic effects. There is,therefore,a need to analyse the cable stayed bridges for dynamic loads and to examine the behaviour of such systems in greater details. In the present work an integrated plane frame analysis of all the structural components of two cable stayed bridges from foundation to girder have been done. First bridge is cable stayed pedestrian bridge at Roorkee and second bridge is cable stayed bridge at Hardwar. The dynamic response of cable stayed bridge at Roorkee has been studied for both horizontal and vertical excitation separately.Using different cable configurations (radiating configuration, parallel configuration etc.) and varying the foundation soil stiffnesses, the dyna,~nic response of cable stayed bridge at Hardwar has been studied. A lumped mass model is made for dynamic analysis in longitudinal direction.A comparative study between dynamic response of cable stayed bridges having different cable configurations as well as between the dynamic response of cable stayed bridges having different soil stiffnesses have been performed.