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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 Spatial : Wahana Komunikasi dan Informasi Geografi Jurnal Penelitian Enjiniring Fakultas Teknik Unhas 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.
Analisa Pola Kegagalan Balok Beton Menggunakan GFRP Bar Tanpa Selimut Beton Saddam - Husein; Rudy Djamaluddin; Rita Irmawaty; Kusnadi Kusnadi
Jurnal Penelitian Enjiniring Vol 24 No 1 (2020)
Publisher : Center of Techonolgy (COT), Fakultas Teknik, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jpe.052020.02

Abstract

SADDAM HUSEIN. Analisa Pola Kegagalan Balok Beton Menggunakan GFRP Bar Tanpa Selimut Beton (dibimbing oleh Rudi Djamaluddin dan Rita Irmawaty) Struktur beton bertulang yang menggunakan tulangan baja pada daerah korosif, menjadi rawan terhadap kerusakan atau penurunan kekuatannya akibat korosi.Korosi pada tulangan baja merupakan salah satu faktor penyebab menurunnya kekuatan struktur beton bertulang. Salah satu material yang dikembangkan mengatasi korosi adalah penggunaan material tulangan GFRP (Glass Fiber Reinforced Polymer). Penelitian ini bertujuan untuk menganalisa kapasitas lentur dan pola kegagalan balok beton tanpa selimut dengan menggunakan material tulangan GFRP bar. Desain penelitian merupakan eksperimental laboratorium dengan rekapitulasi sebanyak 6 sampel yang terdiri dari 2 Balok beton menggunakan tulangan baja dengan selimut beton, 2 balok beton menggunakan tulangan GFRP bar dengan selimut beton, 2 balok beton menggunakan GFRP bar tanpa selimut beton. Metode pengujian dilakukan dengan dengan pengujian lentur statik monotonik dan Analisis data menggunakan uji kondisi retak awal dan kondisi ultimit. Hasil penelitian ini menunjukkan bahwa kapasitas lentur pada balok dengan tulangan GFRP bar lebih besar dibandingkan dengan balok tulangan baja dan mampu meningkatkan kapasitas lentur balok dalam menahan beban sebesar 39.76 %, pola kegagalan beton yang terjadi pada balok tulangan baja mengalami kegagalan lentur tekan ditandai dengan retakan yang terjadi pada sisi tertekan dan membentuk retakan tegak dengan sumbu netral beton yang tertekan, sedangkan pada balok beton tulangan GFRP tanpa selimut mengalami kegagalan keruntuhan tekan geser dengan kondisi tulangan berdeformasi (bi-linear) dengan retak miring dan secara tiba-tiba menjalar menuju sumbu netral beton yang tertekan sehingga terjadilah keruntuhan secara tiba-tiba. SADDAM HUSEIN.Failure mode analysis of concrete Beams Using GFRP rebar Without concrete cover (supervised by Rudi Djamaluddin and Rita Irmawaty) Reinforced concrete that uses rebar steel in corrosive areas, are prone to damage or decreased strength due to corrosion. Corrosion in the steel reinforcement is one of the factors that decreasing strength of reinforced concrete. One of the materials developed to overcome corrosion is the use of GFRP (Glass Fiber Reinforced Polymer) reinforcement material. This study aims to analyze the flexural capacity and failure mode of concrete beams without concrete cover using material GFRP bar as reinforcement. The research design was an experimental laboratory with a recapitulation of 6 samples consisting of 2 beams using steel reinforcement with concrete cover.2 concrete beams using reinforcement GFRP bar with concrete cover, 2 beams using GFRP bars without concrete cover. The research method uses the monotonic static flexure and analyzing the data using the initial crack condition and ultimate conditions test. The results of the research indicate the flexural capacity of the beams with GFRP bar reinforcement is higher than steel reinforcement beams and can increase 39.76% of the flexural capacity of the beams in holding loads , the failure mode analysis occurs in steel reinforcing beam experiences compressive failure. Failure was characterized by cracks that occur on the depressing side and form an upright crack with the neutral axis of the compressed concrete, whereas in GFRP reinforced concrete beams without concrete cover, failure of shear compression with conditions of deformed reinforcement (bi-linear) with sloping cracks and suddenly spread towards the neutral axis of the compressed concrete so that there was a sudden collapse.
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
PEMETAAN POTENSI WISATA PULAU MA PEMETAAN POTENSI WISATA PULAU MAITARA DENGAN SISTEM INFORMASI GEOGRAFI Ichsan Rauf; Amrin Conoras; Kusnadi; Ardi Basri; Risky Amelia
Jurnal Spatial Wahana Komunikasi dan Informasi Geografi Vol 23 No 1 (2023): Spatial : Wahana Komunikasi dan Informasi Geografi
Publisher : Department Geography Education Faculty of Social Science - Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/spatial.231.03

Abstract

The government has established the tourism sector as the leading sector of the national economy. This means that the tourism sector is a motor thet can drive economic growth in a region. Maitara Island has considerable potential to be developed as a tourist village in North Maluku Province, especially since Maitara Island has long been known to the people of Indonesai through the 1000 rupiah denomination. Information related to tourist objects in an area is very important for tourists to visit, while for stakeholders this information is useful in developing the tourism. This research was conducted to inventory places on Maitara Island that have the potential to be developed as tourist destinations and to map these potentials based on geographic information systems. The object inventory method is carried out using GPS and camera devices as documentation, while the mapping of these objects is carried out using the ArcGIS application. The results of the inventory show that Maitra Island has natural and cultural landscapes that can be developed as maritime tourism, sports tourism, cultural tourism, and science tourism.
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
Co-Authors . Fakhruddin Amrin Conoras Anak Agung Gede Sugianthara Anwar Anwar Arbain Tata Ardi Basri B, Sukiman Dandi Wahab Dewi Sulistyorini Djamaluddin, Rudy Imran Imran Irmawaty, Rita Luna N. Ngeljaratan Misbah, Zulkarnain K Muhammad Darwis Muhammad Darwis Munawwar M Nur Nyong Hamin Rahman Nasar Rauf, Ichsan Ridwan Ridwan Risky Amelia Rita Irmawaty Rudy Djamaluddin Saddam - Husein Suharman Hamzah Syamsul Syamsul