Numerical Study of Explosion Effects on Reinforced Concrete Structures
Concrete structures are usually used as protective buildings. Subjects like the effect of explosive waves on structures, the extent of damage zone and propagation of explosive waves after explosion are of great importance in this field. In this issue, the parameters which affect on the damage region due to explosive loading are investigated. The LS-DYNA code is used for numerical simulation of explosive loading. In this simulation, concrete and its reinforcement bars are modeled as a composite material by employing the macroscopic blending law. At first, to examine the effect of parameters like compressive strength, poisson ratio, concrete density, charge geometry and stand off, a concrete slab has been simulated with a pre-determined amount of charge. Numerical results of this stage are compared with experimental data which are measured at the same condition in Hermann institute at Germany. After calibrating of primary numerical analysis, parametric study is done. It is shown that increase in compressive strength, percent of reinforcement and density of concrete, decrease the damage region. Changes in poisson ratio have no visible effect on the damage region and Von Misses stresses. Also it is shown that increasing the distance of charge from slab, decreases the damage region. Any change in charge geometry will change the damage region: conical charge resulted in maximum damage and spherical charge causes the minimum damage zone because of different contact area with concrete slabs.
explosion reinforced concrete simulation LSDYNA TNT damaged zone
S. J. MOUSAVT S. BIGDELI
Department of Mechanics, Abhar Islamic Azad University, Abhar, Iran
国际会议
西安
英文
645-655
2007-10-23（万方平台首次上网日期，不代表论文的发表时间）