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Time—History Analysis of Bridge’s Deck Subjected to Vehicular Load Considering Road Roughness
Bridge deck is the most significant part of the superstructure of bridge as it is used by the vehicles to cross over the bridge. The bride deck experiences loads which include the mass of the vehicles and the dynamic loads that are introduced from movement of the vehicles. The dynamic forces might occur from “Bouncing” or from striking a joint or potholes on bridge deck. Because of this every day dynamic loads the deck may experience some cracking because of excessive stress accumulation. As the surface of span degrades over a time, the lane surface irregularity profile also very accordingly. The differing in surface irregularity will give rise to increased dynamic loads on the bridge deck through dynamic interaction between surface irregularity and vehicles. The situation may further worsen when overweight trucks are running on the rough bridge surface. The increase in dynamic force leads to increased stress on bridge deck. It is also noticed that on many of the bridges in Goa there are speed restriction imposed without considering the bridge deck dynamics which get modified according to road roughness condition. The road roughness is another factor which affects the dynamic actions of the span. So, in order to predict the bridge deck performance to roughness modified dynamic loads, i.e. displacement and stress, detailed dynamic analysis has to be worked out. In my study an analytical approach will be carried out considering dynamic effects due to road roughness. A detailed FEM–analysis of typical girder of bridge will be carried out considering road roughness. The results will help in decision making on speed limits on bridges and health monitoring of the bridges and deck surfaces.
Time—History Analysis of Bridge’s Deck Subjected to Vehicular Load Considering Road Roughness
Bridge deck is the most significant part of the superstructure of bridge as it is used by the vehicles to cross over the bridge. The bride deck experiences loads which include the mass of the vehicles and the dynamic loads that are introduced from movement of the vehicles. The dynamic forces might occur from “Bouncing” or from striking a joint or potholes on bridge deck. Because of this every day dynamic loads the deck may experience some cracking because of excessive stress accumulation. As the surface of span degrades over a time, the lane surface irregularity profile also very accordingly. The differing in surface irregularity will give rise to increased dynamic loads on the bridge deck through dynamic interaction between surface irregularity and vehicles. The situation may further worsen when overweight trucks are running on the rough bridge surface. The increase in dynamic force leads to increased stress on bridge deck. It is also noticed that on many of the bridges in Goa there are speed restriction imposed without considering the bridge deck dynamics which get modified according to road roughness condition. The road roughness is another factor which affects the dynamic actions of the span. So, in order to predict the bridge deck performance to roughness modified dynamic loads, i.e. displacement and stress, detailed dynamic analysis has to be worked out. In my study an analytical approach will be carried out considering dynamic effects due to road roughness. A detailed FEM–analysis of typical girder of bridge will be carried out considering road roughness. The results will help in decision making on speed limits on bridges and health monitoring of the bridges and deck surfaces.
Time—History Analysis of Bridge’s Deck Subjected to Vehicular Load Considering Road Roughness
Lecture Notes in Civil Engineering
Das, B. B. (editor) / Gomez, Christy P. (editor) / Mohapatra, Benu. G. (editor) / Naik, Uddhav U. (author) / Hegde, Ganesh (author)
2022-04-25
18 pages
Article/Chapter (Book)
Electronic Resource
English
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