Seismic investigation of heavily damaged beam column joint repaired by chemical epoxy

It is known that, especially in turkey, many existing reinforced concrete buildings constructed in pre 1998 era, have many structural faults, due to deficiencies both in seismic code of the time and in application process. the column-beam regions are subjected to the high shear stresses under the seismic forces. and thus causing sudden failures since the required mode of failure is not accomplished. in this research, seismic behavior of beam column joint which is designed according to the old seismic code of turkey is investigated experimentally, and then the damaged specimen is repaired by chemical epoxy and re-tested. as a conclusion, significant improvement is obtained in lateral load-drift behavior, stiffness degradation and energy dissipation capacities of repaired specimen.