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Effectiveness of the Novel Rehabilitation Method of Seismically Damaged RC Joints Using C-FRP Ropes and Comparison with Widely Applied Method Using C-FRP Sheets—Experimental Investigation

Author

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  • Emmanouil Golias

    (Laboratory of Reinforced Concrete and Seismic Design of Structures, Civil Engineering Department, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece)

  • Adamantis G. Zapris

    (Laboratory of Reinforced Concrete and Seismic Design of Structures, Civil Engineering Department, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece)

  • Violetta K. Kytinou

    (Laboratory of Reinforced Concrete and Seismic Design of Structures, Civil Engineering Department, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece)

  • George I. Kalogeropoulos

    (Laboratory of Reinforced Concrete and Masonry Structures, Civil Engineering Department, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece)

  • Constantin E. Chalioris

    (Laboratory of Reinforced Concrete and Seismic Design of Structures, Civil Engineering Department, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece)

  • Chris G. Karayannis

    (Laboratory of Reinforced Concrete and Seismic Design of Structures, Civil Engineering Department, School of Engineering, Democritus University of Thrace, 67100 Xanthi, Greece)

Abstract

The necessity of ensuring the long-term sustainability of existing structures is rising. An important issue concerning existing reinforced concrete (RC) structures in seismically active regions is that a significant number of them lack the required earthquake-resistant capacities to meet the increased design earthquake demands. Inexpensive, fast and long-term strengthening strategies for repairing/strengthening RC structures are urgently required, not only after destructive earthquakes, but even before they occur. Retrofitting existing buildings extending their service life rather than demolishing and rebuilding new ones is the best option in terms of economic gain and environmental protection. This paper experimentally investigates the effectiveness of externally applied (i) carbon fiber-reinforced polymer (C-FRP) ropes in X-type form and (b) C-FRP sheets that are bonded on both sides of the joint area of RC beam-column joint connections. Six comparative full-scale exterior RC beam-column joint specimens were tested under reverse cyclic deformation. Two of them were control specimens, two were strengthened using C-FRP ropes (novel technique) and two were retrofitted using C-FRP sheets (widely used technique). Extensive comparisons and discussion of the test results derive new quantitative and qualitative results concerning the seismic capacity and the service life extension of the strengthened RC members using the proposed retrofitting scheme.

Suggested Citation

  • Emmanouil Golias & Adamantis G. Zapris & Violetta K. Kytinou & George I. Kalogeropoulos & Constantin E. Chalioris & Chris G. Karayannis, 2021. "Effectiveness of the Novel Rehabilitation Method of Seismically Damaged RC Joints Using C-FRP Ropes and Comparison with Widely Applied Method Using C-FRP Sheets—Experimental Investigation," Sustainability, MDPI, vol. 13(11), pages 1-19, June.
    • Handle: RePEc:gam:jsusta:v:13:y:2021:i:11:p:6454-:d:569794
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    References listed on IDEAS

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    1. Tiago Miguel Ferreira & Hugo Rodrigues & Romeu Vicente, 2020. "Seismic Vulnerability Assessment of Existing Reinforced Concrete Buildings in Urban Centers," Sustainability, MDPI, vol. 12(5), pages 1-20, March.
    2. Saim Raza & Muhammad K. I. Khan & Scott J. Menegon & Hing-Ho Tsang & John L. Wilson, 2019. "Strengthening and Repair of Reinforced Concrete Columns by Jacketing: State-of-the-Art Review," Sustainability, MDPI, vol. 11(11), pages 1-31, June.
    3. G. Mahdavi & K. Nasrollahzadeh & M. A. Hariri-Ardebili, 2019. "Optimal FRP Jacket Placement in RC Frame Structures Towards a Resilient Seismic Design," Sustainability, MDPI, vol. 11(24), pages 1-22, December.
    4. Minh-Tung Tran & Quoc-Bao Bui & Bastian Sentosa & Nhat-Tien Nguyen & Trung-Hieu Duong & Olivier Plé, 2018. "Sustainable RC Beam-Column Connections with Headed Bars: A Formula for Shear Strength Evaluation," Sustainability, MDPI, vol. 10(2), pages 1-14, February.
    5. Vincenzo Manfredi & Giuseppe Santarsiero & Angelo Masi & Giuseppe Ventura, 2021. "The High-Performance Dissipating Frame (HPDF) System for the Seismic Strengthening of RC Existing Buildings," Sustainability, MDPI, vol. 13(4), pages 1-16, February.
    6. Shuang Li & Sidi Shan & Haiyu Zhang & Yi Li, 2019. "Rapid Retrofit of Reinforced Concrete Frames after Progressive Collapse to Increase Sustainability," Sustainability, MDPI, vol. 11(15), pages 1-21, August.
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    Cited by:

    1. Alexander-Dimitrios Tsonos & George Kalogeropoulos, 2021. "Analytical Model for the Design of HSFC and UHSFC Jackets with Various Steel Fiber Volume Fraction Ratios for the Retrofitting of RC Beam-Column Joints," Sustainability, MDPI, vol. 13(20), pages 1-19, October.
    2. Mohammad Amin Molod & Franz-Joseph Barthold & Panagiotis Spyridis, 2023. "Minimally Invasive Retrofitting of RC Joints with Externally Applied SMA Plate—Adaptive Design Optimisation through Probabilistic Damage Simulation," Sustainability, MDPI, vol. 15(4), pages 1-25, February.

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