Review on the Influence of Different Types of Fibers on Beam-Column Joint Under Cyclic Loading

The joint between a beam and a column is the most vulnerable structure component to collapse during an earthquake. One of the approaches to strengthen the beam-column joint is the application of fibers. A structure’s tension and compression load-carrying capability determines its susceptibility to seismic loads. The use of fiber is known to enhance concrete’s mechanical, flexural, and durability properties for its high tensile strength. Steel fiber, glass fiber, polypropylene (PP) fiber, basalt fiber, etc., and different hybrid fibers are currently being studied to understand their functionality to improve the maximum load, failure pattern, stiffness, hysteretic response, and energy absorption capacity of the beam-column joint when subjected to cyclic loading. This study reviews the influence of fiber volume and their optimum aspect ratio in upgrading these properties through a literature review. Steel fiber has better bridging of wider cracks, and PP fiber limits the micro-cracks; hence, their hybrid form significantly increases the strength and ductility by controlling both macro- and micro-cracks. Carbon and PP fiber are observed to increase the energy dissipation capacity better than other fibers. This review paper outlines that incorporating different fibers can be suitable for strengthening beam-column joints considering engineering properties and economy.