Response to Seismic Effect on Cable Stayed Bridges with Different Cable System Under Consideration of SSI

Abstract

The prime aim of the study is to present response to seismic effect on cable stayed bridges with different cable system taking under consideration SSI. It is very much known that Soil Foundation Structure Interaction relies greatly on various factors such as soil and its properties, manner and type of structure and/or its foundation. The factors like the E.Q. induced motions/vibrations are also to be considered as important too. In this paper, the emphasis is on the simplified model and foundation on piles. For the modelling, author has used SAP2000 software. The study includes the response of the bridge modelled towards variation in the cable system under consideration of SSI. Quincy Bayview Bridge is taken as a reference, and six models are created with variation in cable system (ranging from original cable stayed bridge to suspension type, composite bridge and cable stayed suspension hybrid bridge). Soil modelling is done using the spring and dashpots (Kelvin element) for simulation of SSI effects. The results observed that effects of SSI have a substantial impact on selection of cable system for any cable stayed bridges