Impact of Flood Generated Wave Forces on Bridge Superstructure

Abstract

This study examines the effect of wave loading on a bridge model . The quantities of interest include the vertical uplift force generated due to the moments. Analysis is conducted for two stages with different height in each case: 1) intial impact 2.) Fully innudated Stage. The first stage starts from the time when the water free-surface elevation reaches the low chord of the bridge superstructure, the water free surface rises and reaches the top of the bridge barrier where it overtops the bridge and starts to flow on the bridge deck, and until the bridge is totally inundated . The second stage occurs when the bridge first becomes fully inundated, i.e., end of the first stage, and until the most critical events. The costing of the bridge superstructure is estimated. The Analysis is Done manually as well as on software (CSi BRIDGE). For dead & live Load moments whereas the effect of wave is scene only in Software . The Bridge Design is done manually using Limit state Design (LSD) and checked using AASHTO LRFD using CSiBridge Software. Finally it is seen that whether the uplift force which Can be a cause of bridge failure exceeded the weight of bridge deck or not and results are Presented.