Abstract:
The use of fiber reinforced polymers (FRP) in the construction sector mostly started in 1970–1980s, with several applications in all-composite and hybrid structures, internal reinforcement of new structures and internal/external strengthening of existing structures. In spite of that, innovative structural solutions and unprecedented insights on the existing subjects are continually proposed for the composites construction sector.
The present work aims to explore the performance of composite shear walls with Fiber Reinforced Polymer (FRP) sheets, subjected to blast loads. To meet this objective, using numerical modeling based on the finite element (FE) method and dynamic explicit analysis in ABAQUS, the parametric behavior of the system under the effect of blast load intensity was investigated, along with the FRP sheet material, concrete compressive strength, and also the geometric characteristics of wall components such as its thickness, spacing of FRP sheets, and thickness of the cross-sectional shape of the steel plates under the effect of blast load.
It was found that the reinforcement of the composite shear wall by incorporating FRP sheets, not only increases the stress absorption in the wall but also increases the load transfer capacity and leads to high energy dissipation, by means of the polymer fibers. It has been found that Carbon polymer sheets (CFRP) and glass polymer sheets (GFRP) have, respectively, the best and the weakest performance in shear wall stress absorption compared to AFRP sheets, and this is due to the tensile strength and low density of CFRP sheets. As the thickness of FRP sheets increases, the stress, strain and displacement created in the composite shear wall decrease, owing to the increase of the final strength, which is, in turn, the result of the increase of fiber thickness. With the increase of the distance between FRP sheets, wall stresses and displacements decrease as the result of the decrease in the number of fiber sheets. Moreover, increasing the thickness of the steel plate to a certain extent has initially decreased and then, led to the increase of stresses, strains, and displacements of the composite shear wall. Similarly, increasing the compressive strength of concrete to a certain level has first reduced and then, increased stresses, strains, and wall displacements. This behavior occurs due to the presence of the concrete surface, alone, which simultaneously produces tensile and compressive yield of the steel plate, and then, if the wall sheet is not too thick, the behavior of the system is determined by FRP tensile tapes.
Keywords: Finite Element Analysis, Composite Shear Wall, FRP Sheets, Blast Load
Biography:
Dr. Mahdi Hosseini is currently working as a full time Professor (Associate) in the Department of Building Engineering ,College of Civil Engineering, Nanjing Forestry University, China. He was born in 1988. He did his Pre-University (12th) in Mathematical Science from Shahed Pre-univ Center(Iranian Distinguished School), Iran in 2006. Later he Received his Bachelor of Engineering with Distinction in Civil Engineering from Azad University, Iran in 2010 and Later he Received his Master of Technology (M.Tech.) and Doctor of Philosophy (Ph.D.) Degree in Structural Engineering with Grade “A” First Class with Distinction from Jawaharlal Nehru Technological University, India in 2014 & 2019 Respectively. JNTU is the first–ever Technological University in India with NAAC “A” Grade Credit. Dr. Mahdi earned his Postdoctoral with Distinction from, College of Civil Engineering, Nanjing Forestry University, China.
Dr. Mahdi has Published 71 well-researched scholarly papers as first or corresponding author in peer reviewed, refereed reputed International Journals and Conferences, Indexed in SCI, Web of Science ,ISI, Elsevier ,Scopus, UGC, etc. and his Cumulative Impact factor CIF : 316. He has filed and granted with 4 Patent. Actively Participated Several Workshop and Conference with the role of Keynote Speakers and Expert Member. He has won Several Awards/ Prizes/Certificates. To name a few , “International Distinguished Researcher Award” , “Best Scientific Researcher”, “Best Young Scientist Award” , “Best Young Researcher in Structural Engineering”, “Award for Excellence in Research”, “Outstanding Researcher Award” ,“Honorary Higher Doctorate Degree of D.Litt. (Doctor of Letters) California Public University, USA” , Gold Medalist, Topper and Distinguished Master & Ph.D. Student of India and Subcontinent by the Ministry of Science, Research and Technology of Iran., “Distinguished Researcher Award” ,“Innovative Technological Research (Civil Engg.) Award” , “Dedicated Professional Engineer Award” , “Best Invention Award , Silver Medal and A Special Prize, Geneve ,Switzerland” etc.
He is a Fellow / Life Member/ Senior Member/ Member in more than 73 Professional and Service Oriented Bodies including MASCE (USA), MACI(USA), MIRED(USA), FERC(USA),MWASET(USA),DPC (USA), ISOC(USA), AASCIT(USA), MSCIEI(USA), IGS(USA), MISE(UK), MASDF(UK), MIALCCE(Italy), MIAENG(China), MHKCBEES(China), MISET(India), LMISTE(India), LMIMS(India), LMISIAM(India), LMFSI(India), FSIESRP(India), ISSE(Iran),ICI(Iran),ISEE(Iran), IIIS (Iran) , IMS(Iran),YRCIAU(Iran) , etc.
He is an Editor-in-Chief / Editor / Editorial Board Member / Reviewer of more than 268 Peer Reviewed, Refereed Reputed International Journal, He reviewed more than 100 articles for the International peer reviewed journals. He was Successfully Completed Several Certificate Courses by prestigious organization such as an Elsevier, Academy Europe, European Open University, etc.
His research interest is in Structural Dynamics of Linear and Nonlinear Systems, Tall Building, Seismic Analysis and Design of Building Systems, including Reinforced Concrete, Steel and Masonry, Finite Element Analysis, Earthquake Engineering, Composite Structures (CFRP, GFRP, AFRP etc.).
