Finite Element Analysis Of Steel Fiber Reinforced High Strength Concrete Walls Subjected To Blasting Load

The explosion caused by terrorist attack and accident will lead to serious damage orcollapse of the building structure. Therefore, the detailed study of blast response of structuresis of great importance. And thus engineers can set up an effective and complete principle andtechnical measures for protection structure or component. At present, the research on dynamicresponse of basic component under blasting load is still the primary task of anti-explosionresearch.The wall is one of the basic components in structure. The failure and fragmentation of wallsunder blast loading can present a significant safety hazard to building occupants. Therefore, itis of interest to improve the material performance and investigate its corresponding blastresponse. There are many existing research on dynamic performance of beam, plate or columnunder blasting load, but less analysis for the protective wall under blasting load, especiallyanti-explosion performance study of steel fiber reinforced high strength concrete wall. Hence,the research on the dynamic analysis and numerical simulation of blast response of steel fiberreinforced high strength concrete wall has a great importance. In this paper, the research aimat the blast effect of the steel fiber reinforced high strength concrete wall, the main researchcontents are as follows:(1) The present research status of steel fiber reinforced high strength concrete wall underblasting load are summarized. The theory analysis of steel fiber reinforced high strengthconcrete protective wall under certain blasting load has been done by using the approximationdesign of equivalent single-degree-of-freedom system, and the maximum displacement ofdynamic response has been calculated.(2) The numerical simulation for the dynamic response of steel fiber reinforced highstrength concrete wall under air burst has been carried out by using large finite elementsoftware ANSYS/LS-DYNA. The numerical models are validated by comparing the resultswith theoretical results.(3) Parametric studies are carried out to investigate its influences on the blast response ofthe wall. Various parameters including boundary conditions, wall thickness, the peak load andload time are considered. It can be concluded that to increase the wall thickness, strengthen the constraints of boundary conditions are all effective way to improve anti-explosion abilityof the wall. The displacement of the wall is increased with the increase of the peak load andthe growth of the load time. Finally, three failure modes of the wall have been summarizedby analysing the damage status in different load conditions: bend failure, shear failure andshear bend failure.