Experimentally and Numerically Investigating the Performances of Aramid Fiber-Reinforced Steel Beams Under Impact Loadin
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RESEARCH ARTICLE-CIVIL ENGINEERING
Experimentally and Numerically Investigating the Performances of Aramid Fiber-Reinforced Steel Beams Under Impact Loadings 1 · Esra Bıyıklıoglu Elif Agcakoca ˘ ˘ 1
Received: 23 October 2019 / Accepted: 29 April 2020 © King Fahd University of Petroleum & Minerals 2020
Abstract Impact force is expressed as the change of stresses that occur during the collision of two objects. Nowadays both reinforced concrete and steel structures can be exposed to the impact forces. In particular, structures with strategic importance must be reinforced against impact forces. Since the impact loading is an instantaneous and dynamic load, the deformations due to impact occur in a very short time. The study consists of three stages. Initially, experimental research was carried out in order to have high strength of composite element consisting of different epoxy and aramid fiber-reinforced polymers (AFRP). In the second stage, the experimental behavior of the abovementioned samples was examined. Finally, a finite element model was developed in order to have a prediction for the future studies. At the end of the study, when the steel element under impact was strengthened with different ratios of AFRP, displacement value has decreased. With the help of experimental data the finite element model was confirmed with marginal error of 2–3%. Keywords AFRP · Steel beams · Composite · Finite element · Impact loading
1 Introduction The main reason structures are built is to protect human beings from natural disasters and unforeseen incidents which might impose danger to human life. Such accidents act on structures as a sudden loading, i.e., impact force. The impact from these incidents can be in different forms such as an airplane hitting a building, glacier mass hitting the bridge piers or a rock mass avalanching from the mountains as a result of natural disasters. Additionally, today’s strategic structures are exposed to terrorist attacks which result in exerting big impact force on structures. Even if occurrence probability of such incidents is unlikely, any loading condition that the building will encounter during its lifetime should be thoroughly examined for safety reasons. Taking precautions by determining the behavior of the impacted building elements Electronic supplementary material The online version of this article (https://doi.org/10.1007/s13369-020-04608-1) contains supplementary material, which is available to authorized users.
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Elif A˘gcakoca [email protected] Esra Bıyıklıo˘glu [email protected]
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Department of Civil Engineering, Engineering Faculty, Sakarya University, 54187 Sakarya, Turkey
as well as by using state-of-the art technologies in the design stage can be effective in peoples’ life and structure’s safety. Several studies have been conducted regarding on the behavior of steel material under impact loading since 1970 [1]. Tests and experiments which are necessary for studying the impact effect are very difficult to perform and require special tools and equipment. As
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