Paper Details

Aesthetic value and ability to cover large spans are the two main reasons for attracting structural engineerstowards cable supported bridges in the recent years. The present study is to provide insight into how extradosed bridgesbehave structurally under static and dynamic loads Cable supported structures have distinctive dynamic behaviour.Extradosed bridge, which is intermediate to Girder Bridge and cable stayed bridge, owing to its shallow cables, thestructure behaviour of Extradosed Bridge differs from that of cable stayed bridge. Forced vibration of structure for givenEarthquake time history is governed by peak acceleration. For cable stayed structures such as Extradosed cable stayedbridge it is difficult to predict dynamic response using usual methods of dynamic analysis as applied to some otherbridge structures like response spectrum analysis, accurate analysis like time history analysis is time consuming and hastime and cost effects. Nonlinearities can only be considered in time history analysis. A finite element model of theextradosed bridge having same girder, geometrical dimensions and material properties as recently constructed Narmadabridge-3, Bharuch, in MIDAS-CIVIL software has been prepared. Eigen value, Response spectrum and Time historyanalysis have been performed with the help of MIDAS CIVIL Software. The time history analysis is done in order toachieve the seismic response under four ground motions. The study highlights the certain important parameters likedeflection pattern of deck, tension generated in cables, base shear, etc. in recently constructed Narmada bridge-3 inBharuch.

Mr. Tai Mohammed Afzal, Dr. N K Solanki, “DYNAMIC ANALYSIS OF AN EXTRADOSED BRIDGE”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 6, Issue 13, pp. -, January 2019.