22-03-2012, 12:56 PM
ARCHITECTURAL AND STRUCTURAL DESIGN FOR BLAST RESISTANT BUILDINGS
Blast resistant Building.ppt (Size: 971.5 KB / Downloads: 393)
ABSTRACT
Blast resistant is a necessary part of design for more building around the world.
Blast design is no longer limited to Underground shelters and sensitive military sites, buildings used by the general public daily must also have satisfactory blast protection.
By looking at the experience of structural designers over the past several decades it is possible to see successful integration of Blast design into mainstream buildings.
INTRODUCTION
• Damage to the assets, loss of life and social panic are factors that have to be minimized if the threat of terrorist action cannot be stopped.
• Designing the structures to be fully blast resistant is not an realistic and economical option, however current engineering and architectural knowledge can enhance the new and existing buildings to mitigate the effects of an explosion.
• High explosives are solid in form and are commonly termed condensed explosives. TNT (trinitrotoluene) is the most widely known example.
• There are 2 kinds of explosions which are unconfined explosions, confined explosions.
Confined Explosion
•When an explosion occurs within a building, the pressures associated with the initial shock front will be high and therefore will be amplified by their reflections within the building. This type of explosion is called a confined explosion.
•Depending on the extent of venting, various types of confined explosions are possible.
CONCLUSIONS
The aim in blast resistant building design is to prevent the overall collapse of the building and fatal damages. Despite the fact that, the magnitude of the explosion and the loads caused by it cannot be anticipated perfectly, the most possible scenarios will let to find the necessary engineering and architectural solutions for it.
• During the architectural design, the behavior under extreme compression loading of the structural form, structural elements e.g. walls, flooring and secondary structural elements like cladding and glazing should be considered carefully.