IMPROVING EARTHQUAKE PERFORMANCE OF REINFORCED CONCRETE FRAMES WITH CFRP

ERTAN, SULEV and FATIH, ALTUN (2018) IMPROVING EARTHQUAKE PERFORMANCE OF REINFORCED CONCRETE FRAMES WITH CFRP. In: Eighth International Conference On Advances in Civil and Structural Engineering - CSE 2018, 03-04 February, 2018, Kuala Lumpur, Malaysia.

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Abstract

Better understanding reinforced concrete behaviour greatly enhances ones grasp of design essentials and helps to improve them further. Therefore, especially laboratory research activities play an important role in designing earthquake resistant structures and retrofitting existing ones. Through experimental research activities fundamental principles can be put forward to prevent structures undergoing excessive damage during earthquakes. In this study it is aimed to present to seismic behaviour of a one-storey and one span reinforced concrete frame retrofitted by CFRP wrapping. Displacement controlled loading is applied and hysteretic curve of the system is obtained. The corresponding backbone curve is drawn and results are discussed in terms of strength and ductility. By identifying crack development in terms of crack locations and intensity it is aimed to track changes in system behaviour. With hysteretic curve has been demonstrated energy consumption. As a result of experimental data and analytical solution, force-displacement curve is defined and the reason of the change of behaviour is defined with the splitting of the cracks after peak displacements. The reason of the behaviour difference in non-linear region is judged as the splitting of the cracks reduces system stiffness. Then frame system columnbeam joint point and column-foundation joint point are defined as plastic hinge with 0.34 mm thickness of two axis reinforced with single-layer wrapping with impregnated in epoxy resin multi-directional fabrics. After the retrofit, the behaviour of the specimen under the effect of cycle loads done are investigated. As a result, fiber reinforced frames improvement is focused on ductility rather than strength. So it can be concluded that fiber reinforcement should be used in restoring structural elements into their pre-damaged capacity but not as a strengthening measure.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: cfrp, frame system, retrofit, strengthening,reinforcement, strength, ductility
Depositing User: Mr. John Steve
Date Deposited: 10 Mar 2019 09:18
Last Modified: 10 Mar 2019 09:18
URI: http://publications.theired.org/id/eprint/223

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