The Behavior of Low -Strength Reinforced Concrete Column Strengthened with Carbon Fiber Reinforced Polymer Subjected to Cyclic Lateral Load

DOI

10.2991/aer.k.211106.050How to use a DOI?

Keywords

Concrete Column; CFRP; Low-Strength Concrete; Retrofit; Cyclic Loading

Abstract

The impact of unachieved concrete strength causes the column structure components to resist the design load. It is not in an optimal condition, so it needs a strengthening work. One of the strengthening methods mostly used by using composite material is Carbon Fiber Reinforced Polymer (CFRP). According to the ACI 440 2R 17 standards, the application of CFRP is limited to the concrete strength of 17 MPa, while in the reality CFRP is also used for concrete strength lower than standard without knowing its risk. This research aims to comprehend the impact on collapse behavior and structural performance that will happen in the low-strength column that CFRP strengths. This study conducts the experimental work on two specimens of 250 x 250 mm, a height of 1680 mm, with concrete strength of 12.1 MPa. The specimens consist of one specimen without strengthening and one specimen strengthened with two-layer CFRP. Each specimen is subjected to cyclic lateral load which refers to the ACI 374.1-05 standard protocol with a displacement control method. The result of this study obtained the fact that 12.1 MPa of the low-strength concrete column that was strengthened by two layers CFRP was able to increase the peak load capacity of the PC specimen by 20% under push load conditions and 21% under pull load conditions. In addition, the failure occurs at drift ratios above 6% and the average initial stiffness change by 30%. Meanwhile, the secant stiffness has been enhancement as 10%. The highest energy dissipation enhancement in drift ratio was 0.34%, with an energy dissipation enhancement of 216%. Moreover, both the PC specimen and the PP specimen produced relative energy dissipation by 0.289.

Copyright

© 2021 The Authors. Published by Atlantis Press International B.V.

Open Access

This is an open access article under the CC BY-NC license.

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TY  - CONF
AU  - Puji Kurniawan
AU  - Sumargo
AU  - Mardiana Oesman
PY  - 2021
DA  - 2021/11/23
TI  - The Behavior of Low -Strength Reinforced Concrete Column Strengthened with Carbon Fiber Reinforced Polymer Subjected to Cyclic Lateral Load
BT  - Proceedings of the 2nd International Seminar of Science and Applied Technology (ISSAT 2021)
PB  - Atlantis Press
SP  - 316
EP  - 323
SN  - 2352-5401
UR  - https://doi.org/10.2991/aer.k.211106.050
DO  - 10.2991/aer.k.211106.050
ID  - Kurniawan2021
ER  -