A. Ghobarah et al., REHABILITATION OF REINFORCED-CONCRETE FRAME CONNECTIONS USING CORRUGATED STEEL JACKETING, ACI structural journal, 94(3), 1997, pp. 283-294
Citations number
16
Categorie Soggetti
Construcion & Building Technology","Material Science
An experimental investigation was conducted to study the failure mode
of existing reinforced concrete beam-column connections designed durin
g the 1970s. The effectiveness of using innovative corrugated steel ja
ckets for enhancing the seismic shear strength and ductility of these
types of connections was examined. Four large-scale beam-column connec
tions were tested under cyclic loading. The four connections represent
existing frame connection, current code derailed, and two rehabilitat
ed connections. The variables in the test specimens included the amoun
t of joint and column transverse reinforcement and the jacketing of co
lumn only or both column and beam. Test results indicated that the she
ar strength of jacketed joints can be estimated using an approach that
is similar to the current design recommendations for beam-column join
ts. The corrugated jacket was found to be efficient in the rehabilitat
ion of existing structures not meeting current seismic code requiremen
ts. A method is proposed for the design of the corrugated steel jacket
to enhance the shear strength and ductility of the the beam-column jo
int.