Performance of T-joints repaired with different CFRP arrangements

Main Article Content

Fiaz Tahir
Saqib Mehboob
Qaiser Uz Zaman Khan
Faisal Shabir

Abstract

In this investigation, carbon fiber reinforced polymers (CFRP) were used to repair six damaged reinforced concrete (RC) beam-column T joints. Two different types of CFRP configurations (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 the three types was also done in ANSYS to validate model. It was concluded that seismic capacity of repaired specimen is affected by the CFRP configuration 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, and cumulative energy dissipation capacity was 5.24% higher in CFRP configuration-2 as compared to CFRP configuration-1. It was also found that the prevailing cracking pattern of repaired columns largely affects response of repaired specimen. Study also concluded that performance of Beam-column joints can be improved by appropriately selecting the CFRP configuration without altering other parameters.

Article Details

Section
CIVIL ENGINEERING
Author Biography

Saqib Mehboob, UET Taxila

Civil Engineering Department Assistant Professor