Perilaku Sambungan Near Surface Mounted (NSM) FRP dalam Perkuatan Balok Komposit Baja dan Beton

Fransiskus Xaverius Ndale; Alfridus Gado; Ireneus Kota

doi:10.37478/teknosiar.v19i2.6965

Authors

Fransiskus Xaverius Ndale Universitas Flores, Ende, Indonesia
Alfridus Gado Universitas Flores, Ende, Indonesia
Ireneus Kota Universitas Flores, Ende, Indonesia

DOI:

https://doi.org/10.37478/teknosiar.v19i2.6965

Abstract

Struktur komposit baja dan beton sering membutuhkan perkuatan efektif akibat degradasi dan peningkatan beban layanan. Teknik Near Surface Mounted (NSM) Fiber Reinforced Polymer (FRP) telah muncul sebagai solusi superior karena rasio kekuatan-berat yang tinggi dan ketahanan korosi. Namun, tantangan utama tetap ada pada mekanisme kegagalan lekatan yang bersifat getas dan manajemen daktilitas. Penelitian ini menggunakan Systematic Literature Review (SLR) untuk mensintesis studi eksperimental dan numerik mengenai kinerja NSM, parameter lekatan, dan efek prategang. Hasil tinjauan menunjukkan bahwa NSM FRP pasif meningkatkan kapasitas lentur (10%-20%), tetapi secara signifikan mengurangi daktilitas (14.8%-19.35%), dengan kegagalan dominan berupa pengelupasan penutup beton yang getas. Sebaliknya, penerapan prategang (PNSM) menawarkan kinerja unggul, termasuk peningkatan kapasitas (hingga 16.36%) dan kontrol yang lebih baik terhadap retak serta kekakuan awal. Meskipun demikian, tingkat prategang yang terlalu tinggi menimbulkan risiko fraktur FRP prematur dan kegagalan yang sangat getas. Kesimpulannya, desain perkuatan NSM harus mengoptimalkan tingkat prategang untuk menyeimbangkan peningkatan kekuatan dan daktilitas. Penelitian lanjutan direkomendasikan untuk mengembangkan model prediktif yang andal untuk kegagalan lekatan dan menentukan tingkat prategang optimal yang aman, terutama untuk aplikasi di lingkungan tropis.

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Keywords:

NSP FRP, Perkuatan Balok Komposit, Prategang, Kegagalan Lekatan, Fraktur Prematur

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