Seismic performance of strengthened reinforced concrete beam-column joints using FRP composites
Three nonseismically detailed interior reinforced concrete beam-column joints, namely, one eccentric and two concentric joints, strengthened with proposed fiber-reinforced polymer FRP wrapping configurations using glass fiber-reinforced polymer and carbon fiber-reinfo...
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| Main Authors: | , |
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| Other Authors: | |
| Format: | Article |
| Language: | English |
| Published: |
2012
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/95621 http://hdl.handle.net/10220/8393 |
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| Institution: | Nanyang Technological University |
| Language: | English |
| Summary: | Three nonseismically detailed interior reinforced concrete beam-column joints, namely, one eccentric and two concentric
joints, strengthened with proposed fiber-reinforced polymer FRP wrapping configurations using glass fiber-reinforced polymer and
carbon fiber-reinforced polymer strips and sheets, were tested under constant axial compression load and reversed cyclic loading which
simulated low to moderate earthquake forces. Seismic performance of the strengthened beam-column joints in terms of their hysteresis
response, stiffness, and energy dissipation capacity is evaluated and compared to those of the original and unstrengthened beam-column
joints. Results indicate that applying strips at 45º on a flushed eccentric joint core and as cross bracing on the beam and confinement round
the column is very effective. All specimens failed with gradual strength deterioration, bond degradation, and debonding of FRP sheets was
observed near the joint core. The proposed strengthening schemes were found to be efficient and economical for mass repair or upgrading
of nonseismically detailed structures. |
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