Analysis of the Lateral Surface Blast Loading in 3Dimensional Numerical Model of Reinforced Concrete Underground Structure with RHT Resistance

Due to the insecurity caused by terrorist attacks, nowadays assured and underground structures play an important role in the development of the country, and are considered as vital arteries in major cities, Especially in crises . The Regulations and standards of constructing or procedures designing of blast-resistant structures are very scarce. Because of security reasons of classified military technologies, civil engineers do not have access to the results of field experiments explosion and Design procedures and advanced construction techniques for protecting military sites and assured structures as well as its regulations. So the only way to understand the structural response is analytical methods and at a higher level using numerical simulations with software. In this paper, numerical simulation methods is used for the analysis and simulation of surface explosions on the underground structure. All the simulations and modeling presented are using AUTODYN hydro code. In order to evaluate the structure response, parametric analysis is used that includes the effect of the explosive charge weight on the buried structure. Owing to the progression of pressure wave in the soil and the standard of peak particle velocity of explosion, the Failure of structure are examined. In the end, the numerical results are compared to relations presented at the scientific source and the US Army Corps of Engineers Manual (TM5-855-1).assets.