Pengaruh Penambahan Tulangan Vertikal Pada Perkuatan Balok Beton Bertulang Dengan Menggunakan Metode Deep Embedment

Ilham Akbar, Ridwan Ridwan, Muhammad Ikhsan

Abstract


Abstrak

 

Kapasitas beban struktur beton bertulang eksisting seringkali tidak mencukupi untuk memenuhi standar saat ini. Hal ini dikarenakan peningkatan kebutuhan beban dan degradasi material beton serta korosi tulangan akibat kondisi lingkungan. Penelitian ini dilakukan untuk mendapatkan pengaruh penambahan tulangan vertikal pada perkuatan beton bertuang dengan menggunakan metode deep embedment (DE). Dalam penelitian ini dipersiapkan tiga buah benda uji balok beton bertulang, yaitu Balok-CS, Balok-D8, dan Balok-D12. Ketiga benda uji mempunyai ukuran penampang 150 mm x 200 mm dan panjang bentang 1400 mm. Ada dua ukuran tulangan yang digunakan sebagai tulangan perkuatan DE, yaitu tulangan diameter 8 mm dan 12 mm. Pengujian Balok-CS dibebani sampai runtuh, sementara Balok-D8 dan Balok-D12 dibebani 2 kali. Pembebanan pertama dilakukan sampai balok tersebut mengalami retak pertama dan pembebanan ke dua dilakukan sampai runtuh setelah balok tersebut diperkuat. Hasil penelitian menunjukkan bahwa perkuatan dengan metode DE yang dilakukan dalam penelitian ini dapat meningkatkan kapasitas beban ultimit sampai dengan 43% dibandingkan dengan benda uji kontrol. Sementara itu kekakuan pada balok yang diperkuat dengan metode DE juga meningkat. Hasil pengujian menunjukkan bahwa kekakuan balok yang diperkuat pada fase linear meningkat sampai dengan 70% sementara kekakuan balok pada kondisi ultimit meningkat sampai dengan 91% dibandingkan dengan kekakuan benda uji kontrol.

 

Kata kunci: perkuatan, beton bertulang, metode DE, beban ultimit, kekakuan

 

Abstract

 

Current standards for load capacity are often not met by existing reinforced concrete (RC) structures due to increased loads and corrosion-related degradation of concrete and steel reinforcement bars. This study has developed a technique for repairing RC beams through the use of deep embedment (DE) bars. Three beams, each with a cross-section of 150 ´ 200 mm and a total length of 1400 mm, were constructed with plain bars of 8 and 12 mm diameter as DE bars. Two loading schemes were employed during testing: loading the beam up to failure and precracking to simulate the damage in RC structures. Results showed that the contribution of DE bars to the load capacity was significant. The load capacity of the strengthened beam was 43% higher than that of the control beam. The stiffness of the DE-reinforced beam also increased, with an up to 70% increase in the linear phase and an up to 91% increase in the ultimate condition. The use of embedded DE bars is an effective method for repairing and strengthening RC beams that do not meet load capacity standards. These findings have practical implications for the structural engineering industry, offering a viable solution for deteriorating RC structures.

 

Keywords: strengthening, reinforced concrete, DE method, ultimate load, stiffness


Keywords


strengthening, reinforced concrete, DE method, ultimate load, stiffness

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References


ASTM (2021) 2021: ASTM C39/C39M-21 Standard Test Method for Compressive Strength of Cylindrical Concrete Specimens. West Conshohocken, PA: ASTM International.

Bennegadi, M. L., Hadjazi, K., Sereir, Z., Amziane, S. & El Mahi, B. (2016) General cohesive zone model for prediction of interfacial stresses induced by intermediate flexural crack of FRP-plated RC beams. Engineering Structures, 126, 147-157, https://doi.org/10.1016/j.engstruct.2016.07.030.

Benzeguir Zine El, A., El-Saikaly, G. & Chaallal, O. (2019) Size Effect in RC T-Beams Strengthened in Shear with Externally Bonded CFRP Sheets: Experimental Study. Journal of Composites for Construction, 23(6), 04019048, https://doi.org/10.1061/(ASCE)CC.1943-5614.0000975.

Bocciarelli, M. & Pisani, M. A. (2017) Survey on the interface behaviour in reinforced concrete beams strengthened with externally bonded FRP reinforcement. Composites Part B: Engineering, 118, 169-176, https://doi.org/10.1016/j.compositesb.2017.02.047.

BSN (2019) 2019: SNI 2847:2019 Persyaratan Beton Struktural untuk Bangunan Gedung dan Penjelasan. Jakarta: Badan Standardisasi Nasional.

Chalioris, C. E., Zapris, A. G. & Karayannis, C. G. (2020) U-Jacketing Applications of Fiber-Reinforced Polymers in Reinforced Concrete T-Beams against Shear—Tests and Design. Fibers, 8(2), https://doi.org/10.3390/fib8020013.

Chandra, N., Ridwan, R. & Ikhsan, M. (2019) Finite element modelling of reinforced concrete beam strengthened with embedded steel reinforcement bars. Journal of Applied Materials and Technology, 1(1), 38-45, https://doi.org/10.31258/jamt.1.1.38-45.

Djamaluddin, R., Irmawaty, R. & Kwandou, R. (2015) Kapasitas Rekatan GFRP-S pada Balok Beton Akibat Perendaman Air Laut. Jurnal Teknik Sipil, 22(1), 23-30, https://doi.org/10.5614/jts.2015.22.1.3.

Dutta, B., Nath Nayak, A., Dirar, S., Nanda, B. & Theofanous, M. (2023) Shear strengthening of continuous RC T-beams with deep embedded CFRP and steel bars: A numerical study. Structures, 52, 187-204, https://doi.org/10.1016/j.istruc.2023.03.157.

Faghihmaleki, H. (2021) Comparison of Concrete and Steel Jacket Methods for Reinforcing A Concrete Bridge Pier by Numerical and Experimental Studies. Makara Journal of Technology, 25(2), 63-70, https://doi.org/10.7454/mst.v25i2.3909.

Fu, B., Tang, X. T., Li, L. J., Liu, F. & Lin, G. (2018) Inclined FRP U-jackets for enhancing structural performance of FRP-plated RC beams suffering from IC debonding. Composite Structures, 200, 36-46, https://doi.org/10.1016/j.compstruct.2018.05.074.

Hadjazi, K., Sereir, Z. & Amziane, S. (2016) Creep response of intermediate flexural cracking behavior of reinforced concrete beam strengthened with an externally bonded FRP plate. International Journal of Solids and Structures, 94-95, 196-205, https://doi.org/10.1016/j.ijsolstr.2016.04.012.

Hanif, F. & Kanakubo, T. (2017) Shear Performance of Fiber-Reinforced Cementitious Composites Beam-Column Joint Using Various Fibers. Journal of the Civil Engineering Forum, 3(2), https://doi.org/10.22146/jcef.26571.

Ibrahim, M., Wakjira, T. & Ebead, U. (2020) Shear strengthening of reinforced concrete deep beams using near-surface mounted hybrid carbon/glass fibre reinforced polymer strips. Engineering Structures, 210, 110412, https://doi.org/10.1016/j.engstruct.2020.110412.

Jamal, A. U., Bale, H. A. & Haqiqi, I. (2016) Perilaku Lentur Perbaikan Balok Beton Bertulang dengan Variasi Lebar Carbon Fibre Reinforced Polymer. Teknisia, 20(2), 154-162.

Kar, S. & Biswal, K. C. (2021) Rehabilitation of RC flexural members in shear with externally bonded fiber-reinforced polymer composites: present status and future need. Archives of Civil and Mechanical Engineering, 21(3), 130, https://doi.org/10.1007/s43452-021-00274-8.

Kristianto, A., Pranata, Y. A. & Imran, I. (2017) Studi Eksperimental Penggunaan Pen-Binder dan FRP Sebagai Perkuatan Tulangan Tidak Standar Pada Kolom Lingkaran. Jurnal Teknik Sipil, 24(1), 51-60, https://doi.org/10.5614/jts.2017.24.1.7.

Lie, H. A., Utomo, J., Hu, H.-T. & Lestari, L. T. (2021) Seismic Retrofitting of Irregular Pre-80s Low-rise Conventional RC Building Structures. Civil Engineering Dimension, 23(1), 9-19, https://doi.org/10.9744/ced.23.1.9-19.

Nikoloutsopoulos, N., Sotiropoulou, A. & Passa, D. (2023) Deep embedment and NSM techniques for shear strengthening of reinforced concrete slender beams with cFRP ropes. Materials Today: Proceedings, https://doi.org/10.1016/j.matpr.2023.07.254.

Oller, E., Pujol, M. & Marí, A. (2019) Contribution of externally bonded FRP shear reinforcement to the shear strength of RC beams. Composites Part B: Engineering, 164, 235-248, https://doi.org/10.1016/j.compositesb.2018.11.065.

Ozbakkaloglu, T., Fang, C. & Gholampour, A. (2017) Influence of FRP anchor configuration on the behavior of FRP plates externally bonded on concrete members. Engineering Structures, 133, 133-150, https://doi.org/10.1016/j.engstruct.2016.12.005.

Panahi, M., Zareei, S. A. & Izadi, A. (2021) Flexural strengthening of reinforced concrete beams through externally bonded FRP sheets and near surface mounted FRP bars. Case Studies in Construction Materials, 15, e00601, https://doi.org/10.1016/j.cscm.2021.e00601.

Ridwan, Dirar, S., Jemaa, Y., Theofanous, M. & Elshafie, M. (2019) Strengthening of seismically deficient exterior beam-column connections using embedded steel bars, International Conference on Advances in Civil and Environmental Engineering (ICAnCEE 2018). Bali, Indonesia, October 24-25, 2018. MATEC Web Conf.

Ridwan, R., Dirar, S., Jemaa, Y., Theofanous, M. & Elshafie, M. (2018) Experimental Behavior and Design of Exterior Reinforced Concrete Beam-Column Joints Strengthened with Embedded Bars. Journal of Composites for Construction, 22(6), 04018047, https://doi.org/10.1061/(ASCE)CC.1943-5614.0000883.

Shi, X. (2018) 4 - Monitoring of reinforced concrete corrosion, in Pacheco-Torgal, F., Melchers, R. E., Shi, X., Belie, N. D., Tittelboom, K. V. & Sáez, A. (eds), Eco-Efficient Repair and Rehabilitation of Concrete InfrastructuresWoodhead Publishing, 69-95.

Sultan, M. A., Ridwan, A. R. & Gaus, A. (2022) Efek Perkuatan Glass Fiber Reinforce Polymer Sheet Pada Balok Beton Bertulang Dengan Tulangan Korosi. TERAS JURNAL 12(1), 103-116, https://doi.org/10.29103/tj.v12i1.694

Utomo, J., Khusyeni, M. N., Partono, W., Han, A. L. & Gan, B. S. (2021) Experimental Investigation on the Failure Behavior of Carbon Fiber Reinforced Polymer (CFRP) Strengthened Reinforced Concrete T-beams. Civil Engineering Dimension, 23(2), 115-122, https://doi.org/10.9744/ced.23.2.115-122.

Wijaya, R. A. & Saputra, A. (2016) Repairing and Retrofitting of Earthquake-Affected Exterior Beam-Column Connection by Using Resin Concrete. Journal of the Civil Engineering Forum, 2(2), https://doi.org/10.22146/jcef.27150.

Zhang, S. S., Yu, T. & Chen, G. M. (2017) Reinforced concrete beams strengthened in flexure with near-surface mounted (NSM) CFRP strips: Current status and research needs. Composites Part B: Engineering, 131, 30-42, https://doi.org/10.1016/j.compositesb.2017.07.072.




DOI: http://dx.doi.org/10.29103/tj.v13i2.960

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