Reinforced concrete beam‐column joints through sisal fiber reinforced—An integrated experimental and analytical study of enhancing cyclic behavior

Abstract Beam‐column joints (BCJs) are the highest priority susceptible section of a seismically loaded reinforced concrete (RC) moment resistant structure. Recent earthquakes have resulted in significant damage to numerous structures, primarily attributed to insufficient ductility in building columns and connections. The objective of this study is to evaluate the effectiveness of sisal fiber reinforced concrete in BCJs under cyclic loading conditions. Twelve BCJs were designed according to the specifications outlined in IS 13920‐2016 to ensure structural stability. The fiber volume percentage in the concrete mix ranged from 0.5% to 1.5%, with increments of 0.25% of sisal fiber added to M30 grade concrete. The joints were subjected to a gradually increasing load, and the specimens were assessed by analyzing crack patterns, maximum load and deflection behavior, ductility factor, stiffness degradation, energy absorption, and damage index. The analytical simulation was conducted using ANSYS Workbench, a finite element software, to assess performance under cyclic loading conditions. The results from both experimental and analytical studies indicated that an addition of 1.25% sisal fiber content was most efficient, while 1.5% led to decreased concrete performance. The inclusion of sisal fiber in the BCJ area effectively reduced earthquake‐induced damage and cracks.