Title:
Rehabilitation of Reinforced Concrete Frame Connections Using Corrugated Steel Jacketing
Author(s):
A. Ghobarah, Tarek S. Aziz, and Ashraf Biddah
Publication:
Structural Journal
Volume:
94
Issue:
3
Appears on pages(s):
282-294
Keywords:
beam-column joints; confined concrete; corrugated steel; earthquake-resistant structures; experimental frames; reinforced concrete; strength; seismic rehabilitation; structural design
DOI:
10.14359/480
Date:
5/1/1997
Abstract:
An experimental investigation was conducted to study the failure mode of existing reinforced concrete beamcolumn connections designed during the 1970s. The effectiveness of using innovative corrugated steel jackets for enhancing the seismic shear strength and ductility of these types of connections was examined. Four largescale beamcolumn connections were tested under cyclic loading. The four connections represent existing frame connection, current code detailed, and two rehabilitated connections. The variables in the test specimens included the amount of joint and column transverse reinforcement and the jacketing of column only or both column and beam. Test results indicated that the shear strength of jacketed joints can be estimated using an approach that is similar to the current design recommendations for beamcolumn joints. The corrugated jacket was found to be efficient in the rehabilitation of existing structures not meeting current seismic code requirements. A method is proposed for the design of the corrugated steel jacket.