"DYNAMIC ANALYSIS OF SHORT SPAN BRIDGESANALYTICAL AND MATHEMATICAL APPROACH"

The fundamental frequency of vibration of bridge deck is a key parameter that represents the dynamic characteristics and the condition of the super structure. Comparative study of natural period equations from different countries like Indian, Japan, America and New Zealand codes has done. The mathematical formula has been proposed for the natural period of short span bridges using single degree of freedom system, and validation of that formula is done using the same. Graphs have been plotted for natural time period by varying different parameters of the bridge structures using derived equation. The dynamic analysis of short span bridge is done for the calculation of natural period. Those results have been examined with finet element analysis software- Midas civil.