EXPERIMENTS AND NUMERICAL ANALYSES ON DYNAMIC DEFORMATION OF STEEL-CONCRETE STRUCTURE UNDER INTERNAL INTENSE BLAST LOADING

摘要

Explosion containment vessel (chamber) is used to protect personnel and experimental equipment in the destruction of explosion environmental. An important issue is how to enhance explosion containment vessel's performance of withstanding internal intense blast loading. Research work about using concrete or compositematerial to reinforce explosion containment vessel is being developed in recent years.This paper is devoted to study the dynamic deformation law of steel-concrete structure under internal intense blast loading produced by different charges mass through small-scale model experiments. Macro-datas of concrete and steel cylinder'deformation are obtained. The experimental results show that steel cylinders' axial deformation is not remarkable, circumferential deformation grow with mass of charges increasing. When steel cylinders are damaged, the form of penetrability crack shows that steel cylinders have a shearing fracture form; It indicates that dimensionless displacement parameter of concrete under intense blast loading is a decaying exponential function with scaled-distance increasing. Dynamic response of steel-concrete structure under internal intense blast loading was simulated by using LS-DYNA soft. A good agreement between numerical simulation predictions and experimental results of steel-concrete structure deformation was obtained.