عنوان مقاله [English]
Nowdays, for the designing of underground structures in addition to common loads such as earthquakes, explosives loading is considered. Most of these structures around the world are constructed in a safe depth in the soil. The depth of earth where underground structure under explosive forces does not receive damage, called “safe”. The depth in design and construction of underground structures for use more of the anchor properties of the soil around the structure and minimize the structural weight and also using the damping properties of the soil to reduce the shock wave caused by the explosion of the exact penetrating weapons. Usually explosive loading of these structures is based on the relations and procedures from theoretical and experimental research. Also the numerical methods and using finite element softwares to calculate the explosion load of these structures has been prevalent. In this study the effects of buried explosion on a reinforced concrete underground structure is investigated numerically and analytically. The numerical simulation was carried out using finite element software AUTODYN. In order to analyze the how to explosive loading and underground structure response, the effect of weight of explosive and buried depth of structures was investigated. Additionally, numerical results with relations that presented in reliable scientific resources and US instructions for designing this type of structures were compared. Finally, according to the results of research, in order to improve the designing of these structures under explosion loading in soil, it’s suggested that the incremental factor doesn’t apply to such loads.