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All Journal Inersia : Jurnal Teknik Sipil dan Arsitektur JURNAL SIMETRIK Civil Engineering Journal IJEBD (International Journal Of Entrepreneurship And Business Development) Journal of Science and Engineering Journal Of Khairun Community Services CLAPEYRON: Jurnal Ilmiah Teknik Sipil Jurnal Pengabdian Khairun
Kusnadi Kusnadi
Universitas Khairun
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STUDI EKSPERIMENTAL PENGARUH RADIUS PILAR MASSIF TERHADAP POLA GERUSAN LOKAL Anwar Anwar; Dandi Wahab; Ichsan Rauf; Kusnadi Kusnadi; Zulkarnain K. Misbah
JURNAL SIMETRIK Vol 11, No 2 (2021)
Publisher : Pusat Penelitian dan Pengabdian Kepada Masyarakat (P3M) Politeknik Negeri Ambon

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31959/js.v11i2.830

Abstract

Gerusan lokal pada pilar jembatan menjadi salah satu penyebab instabilitas pada struktur jembatan yang berpotensi terhadap kegagalan struktur jembata. Keberadaan pilar yang menopang struktur atas jembatan di badan sungai menyebabkan terjadinya perubahan pola aliran sehingga erosi pada dasar sungai tidak dapat dihindari. Oleh karena itu, upaya untuk mereduksi besaran gerusan lokal harus menjadi perhatian dalam perencanaan struktur pilar, seperti dengan menentukan bentuk geometri pilar jembatan. Penelitian ini bertujuan untuk mengetahui pengaruh radius pilar terhadap potensi gerusan lokal yang terjadi di sekitar pilar tersebut melalui ekperimen di laboratorium. Bentuk pilar yang digunakan adalah pilar massif dengan hidung pilar (pier-nose) berbentuk bulat dengan jari-jari (r) yang bervariasi dari 1;1,5 dan 2. Penampang saluran yang digunakan memiliki panjang 7400 mm, lebar 280 mm dan tinggi 400 mm. Kondisi aliran yang digunakan adalah aliran seragam permanen (steady uniform flow) dengan dua variasi debit, sementara kemiringan dasar saluran yang digunakan tetap sebesar 0.6%. Hasil penelitian ini menunjukkan bahwa semakin besar radius hidung pilar maka akan semakin kecil gerusan lokal yang terjadi, adapun debit memberikan pengaruh sebaliknya.
PENGARUH PENAMBAHAN SUPERPLASTISIZER TERHADAP CAMPURAN BETON RINGAN YANG MENGGUNAKAN STYROFOAM Kusnadi Kusnadi; Dewi Sulistyorini
Inersia : Jurnal Teknik Sipil dan Arsitektur Vol 7, No 2 (2011): Desember
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1300.485 KB) | DOI: 10.21831/inersia.v7i2.3684

Abstract

The risk of failure of structures effect of earthquake be high due to the heavyvolume of concrete has a fairly high (2400 kg/m3). Advances in technology and theimpact of the economic crisis encourage construction of infrastructure use concretemasonry units under 1900 kg/m3 in weight. The use of lightweight concrete is thefiller material styrofoam intend at non structural components like wall. One of theproblem of making lightweight concrete using styrofoam is the low value of slump, sothat the mix becomes difficult (low workability). It is therefore necessary to addmaterial superplastisizer This research used 20 cylinder test samples. Thecomposition of the mixture consists of sand, cement and grain of styrofoam. Thestyrofoam in concrete is 20% in volume. The Sample variation consists of lightweight concrete using styrofoam without superplastisizer is four cylinder, with addedsuperplastisizer four cylinder were 0.5%, 1.0%, 1.5% and 2%, respectively in weightof cement. The results showed the addition of superplastisizer 0.5%, 1%, 1.5% and2% of the cement weight increases the value of slump were 100%, 183%, 216% and507% respectively. The addition of superplastisizer 0.5%, 1%, 1.5% and 2% of thecement weight increase ceompression strength were 8.48% 4.25%, 12.67% and17.37% respectively. The addition of superplasticizer will increases the slump for thesame water content in fresh concrete, so can increase the compressive strength ofconcrete cylinder.Keyword : beton styrofoam, workabilitas, superplasticizer
Pengenalan Dan Pelatihan Computer Aided Engineering Menggunakan Software Abaqus Bagi Karyawan Konsultan Di Maluku Utara Arbain Tata; Kusnadi Kusnadi; Sukiman B; Muhammad Darwis
Journal Of Khairun Community Services Vol 2, No 1 (2022): Journal Of Khairun Community Services
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jkc.v2i1.4229

Abstract

Peningkatan kualitas sumber daya manusia di bidang pendidikan menjadi fokus tujuan dalam kegiatan pengabdian masyarakat ini. Melalui pelatihan software Abaqus, kualitas sumber daya manusia pada karyawan konsultan di maluku utara diberikan pemahaman dan pengetahuan tentang software Abaqus yang 79% dari peserta belum pernah mengetahui software tersebut sebelumnya. Dengan metode ceramah, tanya jawab, demonstrasi dan praktek diberikan dalam penyajian materi. Kegiatan pelatihan diselenggarakan pada hari sabtu, tanggal 27 November 2021. Kegiatan dilaksanakan di laboratorium computer aided enginerring (CAE)-fakultas teknik, universitas khairun ternate. Materi pelatihan berisi tentang pengenalan software Abaqus, simulasi 2D dan simulasi 3D part, assembling dan mesh. Hasil dari pelatihan software Abaqus ini diperoleh nilai kepuasan 58% dengan skala penilaian sangat baik untuk fasilitator, sedangkan untuk skala penilian baik 51% untuk fasilitas dan 52% pemateri.
ANALISA KUAT GESER BALOK BETON BERTULANG BERLAPIS BETON NORMAL-BETON STYROFOAM Kusnadi Kusnadi; Imran Imran; Muhammad Rizal
Journal of Science and Engineering Vol 5, No 1 (2022): Journal Of Science And Engineering (JOSAE)
Publisher : Fakultas Teknik Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/josae.v5i1.5014

Abstract

This study aims to analyze the shear strength of layered reinforced concrete beams as a composite. Concrete beams consist of normal concrete f'c 25 MPa on the compression side and lightweight concrete of 2.55 MPa, 1.32 MPa and 0.31 MPa on the tensile side as a consequence of the use of styrofoam as much as 30%, 40% and 50% of the concrete volume. This layered concrete beam is intended to reduce the weight of the structure. The tested beam is designed without shear reinforcement with dimensions of .150 cm long, 15 cm wide and 32 cm high, given 3Æ12 flexural reinforcement. The beam test used two concentrated loads with an effective shear-span ratio (a/d) 1.43 to ensure shear failure. The shear strength of layered concrete beams depends on the quality of each layer of concrete where the higher the quality of the cross-sectional concrete, the higher the shear strength. The prediction of shear strength based on the regulation is in line with the shear strength in the first oblique crack condition. 
KAJIAN SIMULASI BANJIR DESA DORO DENGAN APLIKASI HECRAS 2D Ridwan Ridwan; Ichsan Rauf; Kusnadi Kusnadi
CLAPEYRON: Jurnal Ilmiah Teknik Sipil Vol 3, No 2 (2022): Clapeyron : Jurnal Ilmiah Teknik Sipil
Publisher : CLAPEYRON: Jurnal Ilmiah Teknik Sipil

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/clapeyron.v3i2.5392

Abstract

Desa Doro yang telah menjadi salah satu wilayah langganan banjir di Provinsi Maluku Utara. Beberapa media local menyatakan bahwa kejadian banjir didesa ini telah terjadi sejak tahun 2018 hingga saat ini. Kejadian banjir berdampak pada kehidupan masyarakatnya serta memutus jaringan jalan Provinsi, sehingga pengendalian banjir mutlak harus dilakukan. Upaya pengendalian banjir dalam penelitian ini difokuskan pada analisis kapasitas sungai Laka sebagai system drainase alami serta pola sebaran banjir yang terjadi di desa Doro. Dalam studi ini kajian banjir dilakukan dengan beberapa pendekatan analisa, baik analisa morfometri DAS sungai Lasa, pendekatan statistic untuk analisa hidrologi yang bertujuan mentransformasi nilai curah hujan menjadi debit banjir dengan kala ulang 2, 5, 10 dan 25 tahun, serta analisa hidrolika aliran sungai Laka dengan menggunakan perangkat lunakHec-RAS 2D. Hasil penelitian ini menunjukkan bahwa debit banjir untuk kala ulang 2, 5, 10 dan 25 tahun berpotensi menyebabkan terjadinya genangan di desa Doro masing-masing seluas 3.43 ha, 4.23 ha, 4.78 ha dan 5.19 ha. Adapun validasi untuk luas dan tinggi genangan berdasarkan beberapa kejadian banjir sebelumnya menunjukkan deviasi sebesar 1.15 % terhadap model yang dihasilkan. 
Compressive Strength Characteristics of Lightweight Concrete with Modified EPS and Pumice Sand Munawwar M Nur; Kusnadi Kusnadi; Ichsan Rauf
IJEBD (International Journal of Entrepreneurship and Business Development) Vol 5 No 5 (2022): September 2022
Publisher : LPPM of NAROTAMA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29138/ijebd.v5i5.1883

Abstract

The environmentally friendly lightweight material is a concept for developing construction material technology. One way is to reduce density by using plastic waste such as Expanded Polystyrene (EPS) as the concrete aggregate. Although on the other hand, the mechanical value has decreased significantly. This research explains the development of lightweight concrete, EPS (BREA), which uses Modified EPS waste as coarse aggregate and pumice sand as fine material, obtained locally from Tidore Island. The mixture composition used in this study was 1 Cement: 2 Sand: 3 MEPS, where the compressive strength test was carried out to see its mechanical behaviour. The research shows that the composition above reduces the volume weight and compressive strength values by 56.12% and 78.46%, respectively, compared to normal concrete.
Road Slope Stability Analysis with Limit Equilibrium Method Syamsul Syamsul; Ichsan Rauf; Kusnadi Kusnadi; Nyong Hamin
IJEBD (International Journal of Entrepreneurship and Business Development) Vol 6 No 2 (2023): March 2023
Publisher : LPPM of NAROTAMA UNIVERSITY

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29138/ijebd.v6i2.2129

Abstract

Purpose: Landslides are hydrometeorological disasters frequently occurring in many places, particularly during the wet season. Slope stability analysis is the initial stage in defining countermeasures to prevent slope failure and mitigate the negative consequences. This study aims to apply the Limit Equilibrium Method (LEM) to examine the slope stability of the Dufadufa - Jambula road, with the SLIDE version 6.0 application serving as an analytical tool. Design/methodology/approach: Researchers use field measurement data to build a slide application slope model. The soil data used as input parameters are derived using the Robertson chart to interpret the sonder test findings. Findings: According to the results, the minimal slope factor of safety (fs) at the area under consideration is 0.247. It demonstrates that the road slope, which is the study location, is in critical condition; in other words, the slope of the Jambula-Dufadufa road segment has the potential to undergo a slide. Paper type: Research paper
Effect of Bonding Area on Bond Stress Behavior of GFRP Bars in Concrete . Fakhruddin; . Kusnadi; Rudy Djamaluddin; Rita Irmawaty; Suharman Hamzah; Luna N. Ngeljaratan
Civil Engineering Journal Vol 9 (2023): Special Issue "Innovative Strategies in Civil Engineering Grand Challenges"
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-SP2023-09-010

Abstract

The application of Glass Fiber Reinforced Polymer (GFRP) bars is suitable for concrete structures that are susceptible to corrosion, owing to their corrosion-resistant characteristics. Therefore, it is feasible to reduce the concrete cover on reinforced concrete beams by utilizing GFRP bars. However, this can reduce the bonding strength between GFRP bars and concrete. Therefore, this study aims to investigate the bonding behavior between GFRP bars and concrete as a preliminary test for structural applications. The bond stress behavior between GFRP bars and concrete was analyzed by 18 pull-out tests. The test specimens comprised GFRP bars with three different variations, namely GFRP bars with concrete cover (GFRP-C), GFRP bars without concrete cover (GFRP-E), and GFRP bars with a complete wrapping of GFRP sheet (GFRP-C-Sheet). The bond stress-slip curve, bond strength, and failure pattern were utilized to analyze the effect of each variation. The research results indicate that the bonding stress between GFRP bars and concrete was strongly influenced by the concrete cover, where the bonding strength decreased by 65%. Nevertheless, the utilization of a complete wrapping GFR) sheet resulted in a 26.4% increase in bonding stress. The present study has identified three distinct modes of failure, including pull-out (GFRP-C), concrete crushing (GFRP-E), and GFRP sheet debonding (GFRP-C-Sheet). Doi: 10.28991/CEJ-SP2023-09-010 Full Text: PDF
Bantuan Teknis Pemetaan Lahan Pemakaman Warga Kelurahan Ngade Kusnadi Kusnadi; Muhammad Darwis; Imran Imran; Rahman Nasar
Jurnal Pengabdian Khairun Vol 2, No 1 (2023)
Publisher : Universitas Khairun

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33387/jpk.v2i1.6863

Abstract

Pertumbuhan penduduk yang cukup tinggi, keterbatasan lahan dan kondisi topografi, menimbulkan kesulitan bagi warga Kelurahan Ngade menata lahan pemakaman umum  yang baru secara optimal. Untuk menata lahan pemakaman umum yang optimal, maka perlu dilakukan pemetaan lahan yang mendetail agar perencanaannya lebih komprehensif. Pemetaan dimulai dari pengambilan data lapangan dengan alat ukur total station dibantu dengan drone survey. Penggambaran data hasil pengukuran menggunakan perangkat lunak civil 3D hingga terbentuk peta ketinggian dan peta situasi. Hasil pemetaan menunjukkan luas lahan sebesar 5076 m2. Lahan pemakaman baru untuk warga kelurahan Ngade memiliki kemiringan yang besar, kategori agak curam sampai sangat curam dengan persentase luas sebesar 83%.Kata Kunci: Pemetaan, Lahan pemakaman, Kemiringan lahan.
Co-Authors . Fakhruddin Anak Agung Gede Sugianthara Anwar Anwar Arbain Tata B, Sukiman Dandi Wahab Dewi Sulistyorini Luna N. Ngeljaratan Misbah, Zulkarnain K Muhammad Darwis Munawwar M Nur Nyong Hamin Rahman Nasar Rauf, Ichsan Ridwan Ridwan Rita Irmawaty Rudy Djamaluddin Suharman Hamzah Syamsul Syamsul Wiwik Handayani