TY - JOUR
T1 - Seismic behavior of beam-column joints strengthened with ultra-high performance fiber reinforced concrete
AU - Khan, Muhammad Irfan
AU - Al-Osta, Mohammed Ali
AU - Ahmad, Shamsad
AU - Rahman, Muhammad Kalimur
PY - 2018/9/15
Y1 - 2018/9/15
N2 - This paper presents a study on evaluation of seismic performance of shear-deficient beam column joints (BCJs) strengthened by ultra-high performance fiber reinforced concrete (UHPFRC). Normal concrete BCJs having deficiencies in resisting the seismic action were cast, strengthened with a thin layer of UHPFRC, and tested under seismic loading. Two different methods were used for strengthening the normal concrete BCJ specimens consisted of: i) sandblasting the normal concrete substrate surface of BCJs and in-situ casting of a 30 mm thick UHPFRC jacket and ii) bonding 30 mm thick prefabricated UHPFRC plates to seismically deficient BCJ using epoxy resins and special fillers. The performance of UHPFRC jacketing in strengthening the seismically deficient BCJs was experimentally evaluated under reverse cyclic loading using displacement control approach keeping column axial load constant at 150 kN. The analysis of test results showed that the first method of strengthening was highly effective in terms of shear capacity, deformation capacity, stiffness characteristics and energy dissipation capacity, as compared to the second method. © 2018 Elsevier Ltd. All rights reserved.
AB - This paper presents a study on evaluation of seismic performance of shear-deficient beam column joints (BCJs) strengthened by ultra-high performance fiber reinforced concrete (UHPFRC). Normal concrete BCJs having deficiencies in resisting the seismic action were cast, strengthened with a thin layer of UHPFRC, and tested under seismic loading. Two different methods were used for strengthening the normal concrete BCJ specimens consisted of: i) sandblasting the normal concrete substrate surface of BCJs and in-situ casting of a 30 mm thick UHPFRC jacket and ii) bonding 30 mm thick prefabricated UHPFRC plates to seismically deficient BCJ using epoxy resins and special fillers. The performance of UHPFRC jacketing in strengthening the seismically deficient BCJs was experimentally evaluated under reverse cyclic loading using displacement control approach keeping column axial load constant at 150 kN. The analysis of test results showed that the first method of strengthening was highly effective in terms of shear capacity, deformation capacity, stiffness characteristics and energy dissipation capacity, as compared to the second method. © 2018 Elsevier Ltd. All rights reserved.
KW - RC beam-column joint
KW - UHPFRC jacketing
KW - Sandblasting
KW - Prefabricated UHPFRC plates
KW - Reverse cyclic test
KW - Seismic performance
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UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85047647918&origin=recordpage
U2 - 10.1016/j.compstruct.2018.05.080
DO - 10.1016/j.compstruct.2018.05.080
M3 - RGC 21 - Publication in refereed journal
SN - 0263-8223
VL - 200
SP - 103
EP - 119
JO - Composite Structures
JF - Composite Structures
ER -