DESAIN PERKUATAN STRUKTUR BANGUNAN GEDUNG AKIBAT PERUBAHAN FUNGSI DAN UMUR BANGUNAN MENGGUNAKAN CFRP SHEET

Muttaqin Hasan, Mahlil Mahlil, Azzaki Mubarak

Abstract

: Gedung Kantor Ikatan Guru Aceh pada Kantor Badan Kepegawaian Aceh ingin dirubah fungsinya menjadi Ge-dung Arsip, sehingga beban hidup yang akan bekerja menjadi lebih besar dari beban hidup desain. Disamping itu, gedung tersebut telah berumur 30 tahun, sehingga sudah terjadi degradasi kekuatan sebagian material pemben-tuk strukturnya. Berubahnya standar perencanaan struktur bangunan tahan gempa dari SNI 03-1726-1989 (standar pada saat desain) menjadi SNI 1726:2012 menyebabkan beban gempa yang bekerja pada struktur bangunan tersebut menjadi lebih besar. Oleh karena itu, struktur gedung tersebut perlu diperkuat sehingga mam-pu melayani beban yang bekerja pada saat ini. Untuk maksud ini, maka telah dilakukan pengukuran dimensi ele-men struktur dan pengujian kuat tekan beton pada elemen struktur kolom lantai satu, kolom lantai dua, balok lan-tai, pelat lantai dan ring balok menggunakan hammer test. Jumlah tulangan, arrangement tulangan serta diameter tulangan pada elemen struktur tersebut diukur menggunakan alat profometer. Berdasarkan hasil pengukuran dan pengujian tersebut dilakukan analisis untuk mendapatkan kekuatan tersedia dari balok lantai, pelat lantai, ring balok dan kolom. Berdasarkan beban yang bekerja pada saat ini, juga dilakukan analisis struktur untuk mendapatkan kekuatan perlu dari elemen struktur tersebut. Hasil analisis menunjukkan bahwa struktur bangunan tersebut tidak mampu melayani beban yang bekerja saat ini, sehingga dilakukan perkuatan struktur. Perkuatan struktur didesain dengan cara menggunakan externally wrapping system menggunakan material Carbon Fiber Reinforced Polymer (CFRP) sheet setebal 1,2 mm sebanyak satu lapis. Setelah dilakukan perkuatan struktur, ele-men struktur tersebut sudah cukup kuat melayani beban yang bekerja.

 Keywords

perkuatan struktur, CFRP sheet, kekuatan tersedia, kekuatan perlu

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DOI: https://doi.org/10.24815/jts.v9i1.15945

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