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Article

Seismic Performance Enhancement of RC Columns Using Thin High-Strength RC Jackets and CFRP Jackets

Department of Civil Engineering, Aristotle University of Thessaloniki, GR-54-124 Thessaloniki, Greece
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Author to whom correspondence should be addressed.
Academic Editor: Constantin Chalioris
Received: 21 January 2021 / Revised: 4 April 2021 / Accepted: 9 April 2021 / Published: 3 May 2021
The existing non-ductile RC structures built prior to the 1960s–1970s were mainly conceived to carry only vertical loads. As a result, the columns of these structures demonstrate poor overall hysteresis behavior during strong earthquakes, dominated by brittle shear or/and premature excessive slipping of the inadequately lap-spliced reinforcement. In the present study, the effectiveness of two different strengthening systems (including either the wrapping of the columns by carbon-fiber-reinforced polymer textile or the use of thin high-strength reinforced concrete jackets), was experimentally and analytically investigated. The main variables examined were the strengthening material, the length of the lap splices and the amount of confinement provided by the jackets. Three cantilever column specimens were constructed without incorporating modern design code requirements for preserving seismic safety and structural integrity. Subsequently, the specimens were strengthened and subjected to earthquake-type loading. Their hysteresis performances were compared, while also evaluated with respect to the response of two similar original specimens and the behavior of a control one with continuous reinforcement, tested in a previous study. The predictions of the proposed analytical formulation for the hysteresis behavior of the strengthened specimens were satisfactorily verified by the experimental results. View Full-Text
Keywords: CFRP jacket; thin high-strength RC jacket; lap splices; RC columns; cyclic loading; bond-slip; plain bars; retrofit CFRP jacket; thin high-strength RC jacket; lap splices; RC columns; cyclic loading; bond-slip; plain bars; retrofit
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MDPI and ACS Style

Kalogeropoulos, G.; Tsonos, A.-D. Seismic Performance Enhancement of RC Columns Using Thin High-Strength RC Jackets and CFRP Jackets. Fibers 2021, 9, 29. https://0-doi-org.brum.beds.ac.uk/10.3390/fib9050029

AMA Style

Kalogeropoulos G, Tsonos A-D. Seismic Performance Enhancement of RC Columns Using Thin High-Strength RC Jackets and CFRP Jackets. Fibers. 2021; 9(5):29. https://0-doi-org.brum.beds.ac.uk/10.3390/fib9050029

Chicago/Turabian Style

Kalogeropoulos, George, and Alexander-Dimitrios Tsonos. 2021. "Seismic Performance Enhancement of RC Columns Using Thin High-Strength RC Jackets and CFRP Jackets" Fibers 9, no. 5: 29. https://0-doi-org.brum.beds.ac.uk/10.3390/fib9050029

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