Behaviuor of Prestressed Concrete Bridge Under Blast Loading

Document Type : Original Article


Increasing terrorist attacks to substructure and transport structures is an alarm for national security. In the past designing structures against the explosive loads were only limited to       military buildings and buildings related to atomic activities. Bridges are important elements in transport systems. The vital rule of bridges and national importance of them makes the bridges a good target as a terrorist attack. Better design of these structures under explosive load to prevent growing collapse is of great importance. Prestressed concrete bridges are very popular however; there is lack of information and study about these bridges under the explosive load.
In this research a finite element model for concrete bridges with prestressed elements has been established by ABAQUS software. A validation has been carried out by laboratory test of other researchers and acceptable convergence was observed.
Established models were placed on the width of bridge deck under different explosive    scenarios by different weight of explosive materials. Collapse process of bridge has been       observed and the destruction mechanism has also been investigated. Results of this study give us some information about behavior and possible response of pre prepared bridges under the severe explosive load which can help the engineers to select the most effective way of operation improvement and retrofitting of these bridges.


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