JOAN MARY JOJO et al: STRUCTURAL ANALYSIS OF A FIBRE REINFORCED FLEXIBLE DEEP BEAM DOI 10.5013/IJSSST.a.20.01.20 20.1 ISSN: 1473-804x online, 1473-8031 print Structural Analysis of a Fibre Reinforced Flexible Deep Beam Joan Mary Jojo 1 , Nayana A 2 Younus College of Engineering and Technology, Kollam, Kerala, India. 1 joanmaryjojo@gmail.com, 2 adnaanalif@gmail.com Abstract - The fiber reinforced concrete has been one of the top most innovations in concrete technology, highlighting improved structural integrity of the structure, by providing short discrete fibers, distributed uniformly and oriented randomly. Engineered Cementitious Composite, also known as bendable or flexible concrete is yet another fascinating innovation that accounts for drastic development in crack resistance in the structure and providing bendable nature to the member without failure. In this study, finite element analysis of Fiber Reinforced Flexible Concrete deep beam is carried out in ANSYS for cracking pattern, and is compared with the results for a Reinforced Cement Concrete deep beam. It has been observed that the crack resistance of FR Flexible concrete is much higher than that of reinforced cement concrete. Keywords - structural analysis, fiber reinforced, flexible, deep beam I. INTRODUCTION It has become an integral part of the industry. This is because of its high load bearing capacity. It is known for its capacity to take compressive loads, while the main drawback of conventional concrete is that it cannot take much tensile stresses. It fails under the tensile load. This problem can be resolved by the substitution of conventional concrete with flexible concrete. It is a special type of concrete that can take the bending stresses due to its flexibility, induced by special type of materials. It was developed by the Professor Victor Li at the University of Michigan. Its engineering name is Engineered Cementitious Composite (ECC). It exhibits the property of a ductile material instead of a brittle material which is shown by the conventional concrete. Fig.1.An ECC model developed by Professor Victor Li A. Objective of Study Deep beam is a structural member that is in use for numerous mega structures. Flexible concrete being an innovative substitute to curb the tensile strength inadequacy of conventional concrete can be introduced in the construction of high rise structures requiring high strength and resistance. Both being crucial elements in advanced construction technology, it is significant to analyze the performance of a flexible deep beam with fibre reinforcement. In this study, the cracking pattern in a fibre reinforced flexible concrete deep beam is obtained by performing finite element analysis in ANSYS which is compared to RC beam. II. FLEXIBLE CONCRETE A. Materials For giving the concrete flexibility we have to alter the material of the conventional concrete. In the flexible concrete coarse aggregate is replaced by fibers like silica fibers, glass fibers, steel fibers, asbestos fibers, polyvinyl alcohol fibers, etc. These micro fibers provide the flexibility to the concrete. It also act as a reinforcement material in the concrete. Fig.2.Steel Fibers used in ECC