Behavior of a pool filled with water and loaded by an internal explosion

摘要

The aim of the present paper is to study the behaviour of a rectangular reinforced concrete pool or tank on detonationof an internal explosive. The first part of the paper studies the propagation of shock waves in order to assess thebehaviour of pool or tank walls when subjected to a rapid pressure change versus time increase. The second part of thepaper studies the use of MOI (wave propagation computer code) and CASTEM (mechanical finite element computercode) software to assess structural dynamic response and damage. The MOI code is a simplified assessment methodbased on empirical laws of wave propagation in water. This specific software based on the method of images wasdeveloped and validated by comparison with 3D calculations.First, the impacts of parameters such as the size of the pool or tank, the type and amount of explosive, the vertical andhorizontal position of the explosive charge and the free surface were researched. Then, for a given geometry of the pooland a quantity of explosive, the position of the explosive charge for maximum pool wall load was researched. Pool walldynamic response and associated damage were assessed. The wall behaviour was taken into account (fundamentalconcrete laws, steel bar and cladding shell elastoplastic behaviour). The damage corresponds to the evaluation of thematerial ductility which enables the assessment of the pool behaviour versus explosive charge (position, mass and type)to be assessed.