Flexural strength behavior of t-shaped beam-column joint with varying polypropylene fibre

Abstract

In times like this earthquakes are most commonly occurring phenomenon in every part of the world. It’s crucial to make sure ductility of the structure is high, which is it should seamlessly distort non-elastically and diffuse forces with no major destruction. For any structural frames shear forces and bending moments are concentrated at the intersecting area. One of such areas is beam-column (B-C) joint. These are the most effected failure zones. The present work deals with experimental study of a T-shaped beam-column joint. From the literature, Polypropylene fibre have improved many desired properties of concrete such as flexural strength, breaking point etc. Therefore introduction of this fibre material into beam-column joint can improve joint properties. Previous studies on this fibre do not convey any important work that has been done on beam-column joint using this fibre, specifically pinned under axial force. In this study, 1/3rd scaled specimens of reinforced concrete (plane RC and RC fibres) T-shaped beam-column joint casted and tested for incremental loadings. All the specimens have been detailed by the provisions of IS: 13920, IS: 456. These specimens were tested by applying sequentially incremented repeated loads using Universal Testing Machine (UTM) of 100kN capacity. The results were correlated in different ways such as, flexural strength, hardness, force dissipation and ductility. Hence, in the present research this fibre material is used in T-shaped B-C joint to see the changes occurred in stiffness and flexural strength, of the joint.