Influence of pylon’s geometry on response of cable stayed suspension hybrid bridge (CSSHB)

Abstract

Cable-supported structures/bridges (CSB’s) are used for surmounting across river, stream and sea o any obstructions spanning over for long to very long spans. Their ample stableness, optimal structural materials usage, esthetical appearance, relatively cheap design and maintenance, and greater efficiency is the backbone reason of its dominance. Designs of bridges vary contingent upon the reason it is intended to, function of the bridge, the nature of the terrain where the bridge is constructed and tied down, the material used to make it, and the assets available to build it and so on. Cable Stayed Suspension Hybrid Bridge (CSSHB) has an added advantage additional bit of leeway in inclination over suspension bridge as well as cable stayed bridge. Dynamic investigation is is endeavored to inspect impact of pylon geometry (shape) on Modal Time Period(s) for different time history analysis using SAP2000. 1400 m span CSSHB has been used for the same. Fan type arrangement of cables is considered in this study Hexagonal shaped Pylon exhibits greatest flexibility followed by H, whereas Double Diamond shape, Inverted Y and A shaped pylons exhibit greater stiffness.