Performance of T-joints Repaired with Different CFRP Arrangements

Abstract

In this investigation, carbon fiber reinforced polymers (CFRP) were used for repairing of six damaged reinforced concrete (RC) beam-column T joints. Two different types of CFRPconfigurations (1 & 2) were employed to reinstate the seismic capacity of joints. The specimens were tested under cyclic axial loading till failure. Load deflection relationships of tested specimens were used to draw hysteresis loops and backbone curves. In order to assess the seismic performance this data was then used to calculate energy dissipation values at selected intervals. Finite element modelling of all three types was also done inANSYS to validate model. It was concluded that seismic capacity of repaired specimen is affected by CFRPconfiguration techniques. It was found that the relative energy dissipation capacity of specimens repaired with CFRP configuration-2 was 25.43% higher than CFRP configuration-1.Cumulative energy dissipation capacity was 5.24% higher in CFRP configuration-2 ascompared to CFRP configuration-1. It was also found that the prevailing cracking pattern of repaired columnslargely affects response of repaired specimen. Study also concluded that performance of Beam-columnjoints can be improved by appropriately selecting CFRPconfiguration without altering other parameters.