Rehabilitation of heavily damaged beam-column connections with CFRP wrapping and SFRM casing

Results of an experimental testing program on two beam-column connections at full scale are presented. Specimens were first tested without initial damage. After that, rehabilitation was conducted using two different techniques, namely: externally bonded carbon fiber reinforced polymer and ultra-high...

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Bibliographic Details
Published in:Soil dynamics and earthquake engineering (1984) 2021-06, Vol.145, p.106721, Article 106721
Main Authors: Rodríguez, Vladimir, Guerrero, Hector, Alcocer, Sergio M., Tapia-Hernández, Edgar
Format: Article
Language:English
Subjects:
Beam-column connections
Beam-columns
Carbon fiber reinforced plastics
Carbon fiber reinforced polymer
Concrete structures
Cracking (fracturing)
Damping capacity
Earthquake damage
Earthquakes
Energy dissipation
Fiber reinforced polymers
Ground motion
Mortars (material)
Polymers
Rehabilitation
Rehabilitation of reinforced concrete elements
Seismic activity
Seismic rehabilitation
Steel fibers
Stiffness
Ultra-high performance mortar
Viscous damping
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Summary:Results of an experimental testing program on two beam-column connections at full scale are presented. Specimens were first tested without initial damage. After that, rehabilitation was conducted using two different techniques, namely: externally bonded carbon fiber reinforced polymer and ultra-high performance mortar reinforced with steel fibers. Specimens were then re-tested. Different loading protocols were used on each specimen to assess their impact on the load-deformation capacity. Such protocols were displacement-controlled and applied quasi-statically. Performance of the specimens, before and after rehabilitation, is presented and discussed in terms of strength and drift capacity, energy dissipation, equivalent viscous damping, effective stiffness, cracking, and visual damage. Interesting findings, useful for the rehabilitation of concrete structures after strong earthquake ground motions, are presented. •Experimental tests of two beam-column connections at full scale were conducted.•Specimens were tested without initial damage, then rehabilitated and retested.•CFRP wraps and steel fiber reinforced mortar were used as rehabilitation methods.•Performance parameters of specimens are presented and discussed.•Both rehabilitation techniques achieved adequate seismic performance.
ISSN:0267-7261
1879-341X
DOI:10.1016/j.soildyn.2021.106721