Retrofitting of partially damaged reinforced concrete beam-column joints using various plate-configurations of CFRP under cyclic loading

Obaidat, Yasmeen Taleb; Abu‐Farsakh, Ghazi; Ashteyat, Ahmed M.

doi:10.1016/j.conbuildmat.2018.11.267

Cited by 51 publications

(10 citation statements)

References 24 publications

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“…All the joint specimens were tested under cyclic excitation, while seven joints were pre-loaded, repaired with FRP plates and re-tested. The test results revealed that the proposed FRP systems provide higher loading capacity for all repaired joints, but the failure of specimens was associated with debonding of CFRP plates along with concrete cover delamination [16].…”

Section: Introductionmentioning

confidence: 98%

Cyclic behavior of strong beam–weak column joints strengthened with different configurations of CFRP sheets

Ilia

Mostofinejad

Moghaddas

2020

Archiv.Civ.Mech.Eng

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The current paper reports the results of experiments on deficient exterior reinforced concrete (RC) strong beam-weak column connections strengthened with carbon fiber-reinforced polymer (CFRP) sheets. Five RC-joint specimens with half-scale size were manufactured and tested subjected to constant axial and reversed cyclic quasi-static loads. These joints consisted of one control and four specimens retrofitted with FRP sheets used in different strengthening configuration. The study is mainly directed to the examination of the different anchoring methods for longitudinal FRPs at beam-column intersection including L-shaped anchorage or CFRP anchor fans as a modern anchorage technique. Furthermore, the efficiency of transverse CFRP sheets in the form of innovative corner strip-batten technique to improve the seismic performance of the weak column was compared with longitudinal sheets. The externally bonded reinforcement on grooves (EBROG) method was also used in all strengthening schemes to eliminate surface debonding of CFRP. Test results revealed that although all the retrofitting schemes used led to significant improvements of up to 80% in strength capacity, longitudinal FRP sheets applied through the EBROG method and anchored with CFRP fans were more effective in inducing a completely ductile behavior in the joints, while the plastic hinge was also relocated into the beam.

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Section: Introductionmentioning

confidence: 98%

Cyclic behavior of strong beam–weak column joints strengthened with different configurations of CFRP sheets

Ilia

Mostofinejad

Moghaddas

2020

Archiv.Civ.Mech.Eng

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“…Two RC connections were tested after repairing and the results showed increase in strain of CFRP specimen indicating improvement in overall behavior [13]. Obaidat (2019) retrofitted the partially damaged connection with CFRP plates. The experimental tests were conducted on seven specimens, the connections tested until known load to demonstrate the partial damage and then repaired with CFRP.…”

Section: Introductionmentioning

confidence: 99%

Cyclic performance of exterior R.C beam-column strengthened with different thicknesses of CFRP sheets

Hamzah

Rashid

Hejazi

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The recent ground motion results indicated that the RC buildings are required to be retrofitted by different strengthening techniques. Nowadays, the external strengthening gain interest since its easy, cost effective and not required redesign of buildings. The CFRP sheets are suitable solution and utilized by a number of researchers. However, the numerical cyclic performance of connection strengthened with different thicknesses of CFRP need to be well investigated. This study assessed the performance of RC exterior beam column connection strengthened with CFRP sheets First, two grades of concrete are utilized to be control specimens, normal concrete compressive strength (C20) and high concrete compressive strength (C50) then, the specimens are retrofitted with different thicknesses (1.2, 2.4, 3.6mm) of CFRP sheets. The stresses and damage states showed the importance of connection retrofitting. The CFRP shift the plastic hinge zone away from the panel zone. Furthermore, the results demonstrated that by increase of CFRP thickness the connection resistance will be improved. The comparison between the hysteresis curves demonstrated that the yield and ultimate loading were enhanced for strengthened connection for both concrete grades and the incremental in thicknesses also increase them. The outputs also exhibited that the stiffness and ductility has increased for retrofitted specimens indicating that the CFRP comprehensively overcome the applied cyclic loading and the beam column connection is able to resist such type of loading.

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“…Instead of these reinforcing techniques, reinforcement with FRP has been commonly used for the last 20 years and many structures have been improved with this technique. In addition, several scientific studies on the subject have been performed and FRP has become one of the most favored materials in the reinforcement and retrofitting literature [10][11][12][13][14][15][16][17][18][19][20][21][30][31]. Epoxy, an organic material, is also used to form a cohesive zone between the surface where FRP is applied and the FRP when the studies are examined.…”

Section: Introductionmentioning

confidence: 99%

Strengthening of Columns with Different Innovative Composite Materials for RC Buildings without Sufficient Earthquake Resistance

2022

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Reinforced-concrete columns were strengthened with carbon fiber reinforced polymer and textile reinforced mortar. After that, these columns were subjected to axial load. Load-displacement measurement was taken during the experiment. Figure. Dimensions of test specimen and load-displacement graphics AimThe aim of the study is to investigate the effectiveness of CFRP and TRM in the strengthening of RC columns.

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Retrofitting of partially damaged reinforced concrete beam-column joints using various plate-configurations of CFRP under cyclic loading

Cited by 51 publications

References 24 publications

Cyclic behavior of strong beam–weak column joints strengthened with different configurations of CFRP sheets

Cyclic behavior of strong beam–weak column joints strengthened with different configurations of CFRP sheets

Cyclic performance of exterior R.C beam-column strengthened with different thicknesses of CFRP sheets

Strengthening of Columns with Different Innovative Composite Materials for RC Buildings without Sufficient Earthquake Resistance

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