Most of the literatures are limited to response of simple structures. These studies provide a good fundamental knowledge regarding blast load effects in actual blast explosions. The interaction between blast loads and structures, as well as the interaction among structural members may well affect the structural response and damage. Therefore it is necessary to analyze the structures under blast load effects. Among all the civilian structures bridges are considered to be most vulnerable to such threats and hence detailed investigation in the dynamic response of these structures is essential. This analysis requires accurate generation and application of blast loads and good understanding of the behavior of components of the bridges during high strain rate encountered during blast loads. In this study the response of the bridge structure is studied when subjected to the blast loads. Finite element modeling tool ETABS is used for the analysis of structure. A simply supported three span continuous bridge is to be taken for analysis purpose. The design and analysis of such structure requires a detailed understanding when subjected to blast phenomenon. The dynamic response on the various component parts of the bridge structure is also studied. This will give the complete understanding of blast effects on bridge structure.
