Investigation of the use of glass fiber reinforced polymer materials (GFRP) to improve the strength of one-sided and two-sided reinforced concrete slabs under explosive loads in AUTODYN software

Abstract: Explosive loads due to recent explosions indicate that many non-political and even political buildings have the potential to be destroyed. Explosive loads that have occurred near these buildings indicate that the blast wave from the blast could easily destroy these buildings or cause serious damage to them. To this end, engineers around the world sought new and cost-effective materials along with innovative approaches and systems to solve these problems. This led to many efforts to strengthen the structures. As a result, different countries are now interested in upgrading buildings that have already been built and not designed to withstand explosions. A very important, effective and economical technique in the field of reinforcement is the use of polymer composite fibers (FRP). A lot of research has been done in this field since the early ۱۹۹۰s, and the reinforcement and improvement of concrete, building materials, metal and wood have been studied using this technique. The use of this technique is now common all over the world. FRP materials are available in three types: AFRP, CFRP and GFRP. Aramid fibers were used in AFRP type, carbon fibers in CFRP type and glass fibers in GFRP type. GFRP type is more common than other types of reinforcement due to being more economical and insensitive to magnetic fields and radio frequencies. One of the first studies on the external confinement of concrete using FRP was conducted in ۱۹۸۲. The aim was to investigate the practicality and effectiveness of FRP on concrete [۱-۵]. The purpose of this study is to present a new method to increase the strength of concrete slabs that are subjected to explosive loads. We test this work with glass fiber reinforced polymer (GFRP) polymer, its testing steps have been done in many research centers around the world and have been registered and used in different countries. Is. Of course, this research is mainly on non-explosive loads. Therefore, in this research, according to the results of practical experiments, we deal with modeling in AUTODYN software and adapt the results of modeling with practical experiments, while expressing suggestions for the use of FRP composites. will be.

Keywords:

_Reinforced concrete slabs , Explosive loads , Polymer materials , Glass fibers