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All Journal Teras Jurnal INOVTEK POLBENG Borneo Engineering: Jurnal Teknik Sipil
Ahmad Hernadi
Departement Of Civil Engineering, Universitas Borneo Tarakan
Civil Engineering, Building, Construction & Architecture Computer Science & IT Engineering Environmental Science

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Perbandingan Kekuatan Kolom Berdasarkan SNI 2847:2013 dan SNI 2847:2019 Ahmad Hernadi; Rini Sahara; Septa Utami Dewi
Borneo Engineering : Jurnal Teknik Sipil Volume 5 Nomor 3 Tahun 2021
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v5i3.1661

Abstract

Today, Practitioners of Civil Engineering in Indonesia are still using SNI 2847:2013 as code for reinforcement concrete design. As we know that SNI 2847:2019 been published, but practitioners still not yet use it.The point of design and evaluation in SNI 2847 code is reduction factor (ɸ) that could influence strength design of structure base on it behaviour. Load in Column is not just axial load, but flexural and combine of axial and flexural. This behavior makes the column has variate reduction factor and it can shown by interaction diagram. This research is compare between SNI 2847:2013 and SNI 2847:2019 for column with section 400x500, fc’ 20 MPa and reinforcement ratio 1%. Result of this research is compare between SNI 2847:2013 and SNI 2847:2019 for column with variation fy is not too significant. So when the column of SNI 2847:2013 inspected or evaluated by SNI 2847:2019 is not distinction.
Studi Komparasi Perancangan Balok Struktural Berdasarkan SNI 2847-2002, SNI 2847-2013 Dan SNI 2847-2019 Noerman Adi Prasetya; Ahmad Hernadi; Agung Nugroho
Borneo Engineering : Jurnal Teknik Sipil Volume 5 Nomor 3 Tahun 2021
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v5i3.1874

Abstract

This study aims to determine the difference in structural beam design using SNI 2847-2002, SNI 2847-2013 and SNI 2847-2019 by comparing the bending and shear reinforcement in the case study of the Faculty of Health Sciences Building, University of Borneo Tarakan. The results of the comparisons include: the maximum reinforcement ratio at SNI 2847-2013 and 2019 is around 16,667% smaller than SNI 2847-2002, the flexural capacity of the beam design results from SNI 2847-2013 and 2019 increases by about 12.5% compared to SNI 2847-2002, The shear capacity of concrete (Vc) designed with SNI 2847-2013 and 2019 increased by about 2% compared to SNI 2847-2002, as well as the design shear capacity of the accumulated concrete and shear reinforcement designed by SNI 2847-2013 and 2019 increased no more than 1% compared to SNI 2847-2002.
Kajian Kinerja Bagian Jalinan (Studi Kasus : Jl. Niaga 1 – Jl. Yos Sudarso, Kota Tarakan) Iif Ahmad Syarif; Noerman Adi Prasetya; Rahmad Aidil; Rahmat Faizal; Edy Utomo; Ahmad Hernadi
Borneo Engineering : Jurnal Teknik Sipil Volume 1 Nomor 2 Tahun 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v1i2.597

Abstract

This study aims to determine the performance on a single weave that occurred on Jl.Niaga I - Jl. Yos Sudarso, Tarakan City. The performance is capacity, degree of saturation, speed, and travel time. With these performance parameters serve as based of planning in transportation infrastructure. The results of this study are also expected to provide recommendations to users, planners and policy makers in an effort to solve traffic problems, especially to reduce the delay that occurs in a single wave that occurred on Jl Niaga I-Jl. Yos Sudarso Kota Tarakan.
nalisis Kuat Tarik Kayu Menggunakan PKKNI 1961 dan SNI 7973:2013 Ahmad Hernadi; Noerman Adi Prasetya; Rahcmad Aidil
Borneo Engineering : Jurnal Teknik Sipil Volume 1 Nomor 2 Tahun 2017
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v1i2.603

Abstract

Use of wood construction in Indonesia is decrease significant than concrete and steel. While it is, government by National Standardization Corporation (BSN) had been published Indonesian National Standard about Wood Construction Design Spesification with code SNI 7973:2013. This code absolutly influential the old code which is PKKNI 1961. SNI 7973:2013 is regulate about Load esistance Factor Design (LRFD) and Allowable Stress Design (ASD), while PKKNI 1961 just use ASD method. In case SNI 7973:2013 have been use ASD, but it is different to PKKNI 1961. This research is would to find the different betwen SNI 7973:2013 and PKKNI 1961 to tension member with dimention 5/10, 6/12, 8/12 and 10/10. Result of research to tension member show that LRFD 100%, ASD 65,1% and PKKNI 111,4%.
DESAIN TULANGAN LENTUR PELAT PADA STRUKTUR FLAT PLATE BER-HOLLOW ¬DUA ARAH DENGAN METODE LEBAR EFEKTIF Noerman Adi Prasetya; Ahmad Hernadi
INOVTEK POLBENG Vol 7, No 2 (2017): INOVTEK Volume 7, No 2, November 2017
Publisher : POLITEKNIK NEGERI BENGKALIS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (812.568 KB) | DOI: 10.35314/ip.v7i2.217

Abstract

Untuk mendesain tulangan pelat pada struktur flat plate ber-hollow dua arah perlu penyederhanaan dari bentuk distribusi tegangan yang terjadi, caranya adalah dengan memanfaatkan lebar efektif dari column strip area dan middle strip area, dengan cara ini bentuk momen yang berkontur 3-dimensi diubah menjadi lembaran-lembaran 2-dimensi yang sederhana. Metode desain tulangan memanfaatkan lebar efektif pelat dari struktur flat plate ber-hollow dua arah yang menggunakan hollow berbentuk trapesium, selanjutnya tegangan pelat yang sebelumnya tidak  merata didistribusikan merata pada lebar efektif pelatnya dengan konsep redistribusi momen. Hasil desain lentur dengan menggunakan tulangan ber-diameter 13 mm maka diperoleh spasi terkecil dan terbesar pada column strip sebesar 75 mm dan 140 mm, sedangkan spasi terkecil dan terbesar pada middle strip adalah sama besar yakni 140 mm. Hal ini membuktikan bahwa tegangan pada bagian column strip terbilang lebih bervariasi, sedangkan pada bagian middle strip terbilang relatif kecil dan sama besar. Kata kunci - Lebar Efektif Pelat, Redistribusi Momen
Analisis Forensik Kegagalan Atap Kayu akibat Perubahan Penutup Atap pada Balai Adat Dayak Kalimantan Utara Edy Utomo; Ahmad Hernadi
Teras Jurnal : Jurnal Teknik Sipil Vol. 16 No. 1 (2026): Teras Jurnal
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v16i1.1347

Abstract

Abstrak   Keruntuhan atap kayu pada bangunan publik merupakan peristiwa kritis yang menimbulkan risiko keselamatan dan menuntut evaluasi teknis yang akuntabel. Penelitian ini bertujuan menyajikan analisis forensik kegagalan atap kayu pada Balai Adat Dayak “X” di Kalimantan Utara yang terjadi segera setelah pemasangan penutup atap dan pelepasan penyangga sementara. Perubahan penutup atap dari seng (3,26 kg/m2) menjadi sirap kayu ulin (25 kg/m2) meningkatkan beban mati penutup atap sekitar 21,74 kg/m2 (0,213 kN/m2) atau 667% (7,7 x) dibanding kondisi awal, sehingga menaikkan tuntutan layanan elemen atap. Metode penelitian meliputi investigasi lapangan, pengujian laboratorium sifat material kayu, analisis manual gording sebagai elemen balok, serta pemodelan global rangka kuda-kuda menggunakan SAP2000 mengacu SNI 7973:2013. Evaluasi juga mempertimbangkan peran sambungan, pengaku lateral, dan perubahan kondisi pelaksanaan saat penyangga sementara dilepas. Hasil menunjukkan gording eksisting melampaui kriteria kekuatan lentur dan batas lendutan, sedangkan elemen kuda-kuda secara global masih aman terhadap gaya aksial. Temuan ini menegaskan bahwa kegagalan lokal elemen sekunder dapat memicu keruntuhan sistem atap secara keseluruhan. Studi ini memberikan dasar teknis bagi pengendalian perubahan spesifikasi material, pemeriksaan lendutan, dan pengaturan tahapan pelepasan penyangga pada konstruksi atap kayu.   Kata kunci: Atap, Forensik, Gording, Kayu, Keruntuhan     Abstract Public timber-roof collapses are critical events that pose safety risks and require accountable technical evaluation. This study aims to present a forensic analysis of a timber roof failure at the Dayak Traditional Hall “X” in North Kalimantan, which occurred shortly after roof covering installation and the removal of temporary supports. Replacing a metal sheet roof (3.26 kg/m2) with ironwood shingles (ulin) (25 kg/m2) increased the roof dead load by about 21.74 kg/m2 (0.213 kN/m2), equivalent to 667% (7.7 x) relative to the original condition, thereby increasing serviceability demands on roof components. The methodology includes field investigation, laboratory testing of timber material properties, manual analysis of purlins as local elements, and global modelling of the roof truss using SAP2000 in accordance with SNI 7973:2013. The evaluation also considers the role of connections, lateral bracing, and construction-stage changes when temporary supports were removed. Results indicate that the existing purlins exceeded bending strength and deflection limits, while the truss members remained globally safe in terms of axial forces. These findings confirm that local failure of secondary elements can trigger collapse of the specification changes, checking deflections, and managing the timing of temporary support removal in timber roof construction.   Keywords: Roof, Forensic, Purlin, Timber, Collapse
Co-Authors Agung Nugroho Edy Utomo Faizal, Rahmat Prasetya, Noerman Adi Rahcmad Aidil Rahmad Aidil Rini Sahara Septa Utami Dewi Syarif, Iif Ahmad