ANALISIS PERFORMA BALOK T BETON BERTULANG DENGAN SERAT POLIMER MENGGUNAKAN APLIKASI MIDAS FEA NX
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Abstract
Over time, the structural integrity of a building may experience a decline in its capacity, necessitating the need for structural retrofitting. One method of structural retrofitting that is often used and considered ideal is to use Hybrid Fiber Reinforced Polymer (FRP) due to its ease of use and the ability to amalgamate the favorable mechanical properties of two FRP materials. This research discusses the effect of HFRP sheet composition on the performance of the flexural capacity of reinforced concrete beams. The T-beam specimens have dimensions of 260 mm in height, 155 mm in breadth, 415 mm in flange width, 60 mm flange thickness, and a span length of 2000 mm. These T-beams underwent testing with symmetric two-point loading at simple supports, reinforced with 4Ø10 tensile reinforcement, 2Ø16 compression reinforcement, and stirrups of Ø10. Flexural strengthening was carried out using 3 different HFRP compositions so that 4 test specimens were obtained including a T beam without strengthening as a control. Analysis was conducted using the finite element method through the MIDAS FEA program. The results indicate that each additional layer of HFRP significantly enhances the flexural capacity of the reinforced concrete T-beams by 97,22-145,03%. Finite element method analysis closely aligns with laboratory test results, with a maximum difference of 9% indicating that the finite element method provides a conservative approach for predicting laboratory test results.
Abstrak
Seiring berjalannya waktu, struktur dapat mengalami penurunan kapasitas struktural sehingga perkuatan struktur perlu dilakukan. Salah satu metode perkuatan struktur yang sering dipakai dan dianggap ideal adalah dengan menggunakan Hybrid Fiber Reinforced Polymer (FRP) karena mudah dalam pengaplikasiannya dan dapat memadukan sifat mekanik yang baik dari dua bahan FRP yang digunakan. Penelitian ini membahas pengaruh komposisi lembaran HFRP terhadap kinerja kapasitas lentur balok beton bertulang. Sampel balok T mempunyai tinggi 260 mm, lebar badan 155 mm, lebar sayap 415 mm, tebal sayap 60 mm, dan panjang bentang 2000 mm. Balok T diuji tersebut diuji dengan pembebanan dua titik simetris pada tumpuan sederhana dengan tulangan tarik 4Ø10, tulangan tekan 2Ø16, dan sengkang Ø10. Perkuatan lentur dilakukan dengan menggunakan 3 komposisi HFRP yang berbeda sehingga diperoleh 4 benda uji termasuk balok T tanpa perkuatan sebagai kontrol. Analisis dilakukan dengan metode elemen hingga menggunakan program MIDAS FEA dan menunjukkan bahwa setiap penambahan lapisan pelat HFRP meningkatkan kapasitas lentur balok T beton bertulang sebesar 97,22-145,03%. Hasil analisis metode elemen hingga mendekati hasil uji laboratorium dengan perbedaan terbesar 9% yang menandakan bahwa metode elemen hingga memberikan pendekatan konservatif untuk memprediksi hasil uji laboratorium.
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This work is licensed under Jurnal Mitra Teknik Sipil (JMTS) Creative Commons Attribution-ShareAlike 4.0 International License.References
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