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All Journal BERKALA SAINSTEK Jurnal Rekayasa Sipil dan Lingkungan STATOR: Jurnal Ilmiah Mahasiswa Teknik Mesin Jurnal Teknika Eduvest - Journal of Universal Studies Jurnal Teknik Sipil
Erno Widayanto, Erno
Unknown Affiliation
Aerospace Engineering Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering Environmental Science Health Professions Mathematics Neuroscience Physics Social Sciences Transportation

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Redesign of The Overpass Bridge Structure at Km 839+450 Toll Road Pasuruan-Probolinggo Using Parker Type Truss Bridge Ma'arif, Achmad Zakaria; Wiswamitra, Ketut Aswatama; Widayanto, Erno
BERKALA SAINSTEK Vol 11 No 4 (2023)
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/bst.v11i4.29763

Abstract

The Overpass Bridge Km 839+450 Pasuruan - Probolinggo Toll Road which is located in Leces District, Probolinggo Regency, East Java has a total span length of 144 meters with a Girder I bridge type. This bridge has 5 spans with 4 pillars. The writer want to redesign the bridge into 2 spans to increase the free space under the bridge overpass. The Parker truss bridge type was chosen because it has the lightest self-weight compared to other types of steel truss bridges. This parker type steel truss bridge is planned with a length of 72 m, a width of 12 m, and a height of 13 m. The bridge is designed for 1 lane which has 2 main lanes and 1 emergency lane. From the analysis carried out, the thickness of the vehicle floor plate is 20 cm with concrete fc 30 MPa and reinforcement Fy 410 MPa. The steel structure uses BJ 41 steel quality with profile dimensions on longitudinal girders WF 300.300.10.15, transverse girder profile dimensions using WF 700.300.13.24, main frame girder dimensions using WF 552.500.50.50 & WF 552.475.25.30, transverse wind ties using WF 294.200.8.12, as well as cross wind ties using the L 250.250.35. For the connection, high-strength bolts of type A325 with Fy 820 MPa are used with a diameter of 24 mm and a connection plate which is L 100.100.10, L 120.120.12, and a 25 mm thick plate. on the main frame connection. The placement of the bridge uses the placement of Typer Elastomeric Bearings coated with steel plates with dimensions of 600x600x150 mm. Steel truss bridge parker type has the advantage that the upperstructure's own weight is lighter than the existing bridge, the difference in weight reaches 33,07 %.
PERENCANAAN DAN PEMBUATAN MESIN PEMOTONG RUMPUT SEBAGAI BAHAN DASAR PAKAN TERNAK Widayanto, Erno; ,Aswatama, Ketut; Murti, Krisna; Mulyadi, Santoso
STATOR: Jurnal Ilmiah Teknik Mesin Vol 7 No 1 (2024): JURNAL STATOR
Publisher : Jurusan Teknik Mesin

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Abstract

Rumput merupakan salah satu permasalahan yang serius di Indonesia Saat ini sebagian besar rumput dihasilkan akibat aktivitas manusia. Adanya perubahan pola hidup dalam mengkonsumsi makanan serta kurangnya kesadaran masyarakat terhadap kebersihan lingkungan menyebabkan peningkatan jumlah dan jenis rumput. Masalah yang akan dibahas adalah bagaimana merancang mesin pencacah rumput organik yang menghancurkan dengan hasil butiran atau serpihan dengan luas 2 mm sampai 5 mm agar dalam proses fermentasi dapat berjalan dengan baik untuk hasil kompos lebih baik. Tujuan dari proyek akhir ini ialah merancang bagian dinamis mesin pencacah rumput organik sebagai bahan dasar kompos. Metode pelaksann yang dilakukan berupa pencarian data untuk pengrakitan alat yang kemudian dirakit dan dicoba terlebih dahulu. Kemudian terdapat penyempurnaan alat agar fungsinya lebih efektif lagi. Berdasarkan hasil perancangan dan pengujian mesin pencacah rumput, maka dapat disimpulkan: Daya yang diperlukan untuk mencacah rumput adalah 162 W, diameter pulley penggerak 70 mm dan diameter pulley yang digerakan adalah 100 mm., bahan poros yang digunakan adalah S30C dengan kekuatan tarik (σB) = 48 kg/mm2. Diameter poros yang digunakan 25 mm dan panjang poros 380 mm, Bantalan yang digunakan untuk menumpu poros adalah bantalan radial bola sudut dalam dengan nomor bantalan UCP205, Berdasarkan hasil pengujian, prosentase rumput yang keluar 90,69% sisanya 9,31% atau sebesar 0,6 kg tidak keluar, hal ini terjadi dalam setiap sekali proses dan Kapasitas mesin pencacah rumput sebesar 103 kg/jam. Dari hasil data tersebut mesin pencacah berfungsi dengan baik dan dapat menampung smapah dengan efektif.
ALTERNATIF DESAIN STRUKTUR GEDUNG MONUMEN DAN MUSEUM REOG PONOROGO DENGAN FRICTION PENDULUM SYSTEM Mustika Hari, Hanisya Indah; Wiswamitra, Ketut Aswatama; Widayanto, Erno; Krisnamurti; Nurtanto, Dwi
Jurnal Teknika Vol 17 No 1 (2025): MARET
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/jt.v17i1.1285

Abstract

Kabupaten Ponorogo, yang terletak di pantai selatan Jawa dan berbatasan dengan Kabupaten Pacitan di selatan, sering mengalami gempa bumi karena berada dekat dengan zona aktif subduksi antar lempeng, ialah Lempeng Eurasia didorong ke utara oleh Lempeng Indo-Australia dengan kecepatan 50 hingga 70 mm/tahun. Hal tersebut dapat meningkatkan risiko gempa di wilayah Ponorogo. Penelitian ini menekankan pengembangan sistem isolasi dasar FPS sebagai solusi efektif untuk mengurangi dampak gempa. FPS dipilih karena kemampuannya dalam mengurangi gaya gempa, kerusakan struktural, dan top drift. Selain itu, FPS dinilai lebih baik dibandingkan dengan LRB dan HDRB, terutama saat terjadi gempa dekat. Tujuan utama penelitian adalah membandingkan perilaku struktur Monumen dan Museum Reog Ponorogo yang saat ini memanfaatkan sistem ganda SRPMK+SDSK dengan struktur alternatif SRPMK+isolator dasar FPS. Struktur alternatif ini mengganti dinding geser dengan kolom dan balok yang disesuaikan dengan dimensi lantai yang sama. Analisis memanfaatkan metode respons spektrum dengan program ETABS yang memperlihatkan hasil bahwa periode struktur alternatif meningkat 2,47 kali lipat (arah x) dan 2,17 kali lipat (arah y) dibandingkan dengan struktur eksisting. Selain itu, gaya geser struktur alternatif berkurang 46,79% dibandingkan dengan struktur eksisting, sementara simpangan antar lantai menurun secara signifikan, rata-rata 51,52% (arah x) dan 40,76% (arah y). Spesifikasi FPS yang dipergunakan adalah FIP-D M 1750/800 (3700), menegaskan efektivitasnya dalam meningkatkan ketahanan struktural terhadap gempa di wilayah rawan seperti Ponorogo.
THE USAGE OF BRACING ON EARTHQUAKE RESISTANT BUILDINGS WITH PUSHOVER ANALYSIS: Pemakaian Bracing Pada Bangunan Tahan Gempa dengan Analisis Pushover Anggraeni, Dwi Wahyu; Widayanto, Erno; Nurtanto, Dwi
Jurnal Rekayasa Sipil dan Lingkungan Vol. 1 No. 01 (2017): JURNAL REKAYASA SIPIL DAN LINGKUNGAN
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (720.976 KB) | DOI: 10.19184/jrsl.v1i01.3747

Abstract

Most of Indonesia area is an earthquake- prone region. This is caused by the confluence of three major plates world that are subduction. Indo-Australian Plate colliding with the Eurasian plate off the coast of Sumatra, Java and Nusa Tenggara, while the Pacific plate in northern Guinea and North Maluku. In the vicinity of the meeting location this plate collision energy accumulated in the form of earthquake. The quake destroyed much of the multi-storey buildings that do not have adequate strength. Therefore , the higher the building, the greater the effects of the earthquake were received by the building. One way to acquire resistance to earthquake response was to add rigidity to a building. How to obtain the stiffness of a building is to install bracing for high-rise buildings. The purpose of this analysis was conducted to determine usage behavior particularly bracing displacement. The Results of this analysis showed a reduction in horizontal deviation of the building due to the addition of frame bracing. The difference in the percentage of horizontal deviation without bresing building and building using bresing X is 82.519%. While the difference in the percentage of horizontal deviation without order bresing building and building using bresing V is 64.904%. Sebagian besar wilayah Indonesia merupakan wilayah rawan gempa. Hal ini disebabkan oleh pertemuan tiga lempeng utama dunia yang bersifat subdaksi. Lempeng Indo- Australia bertabrakan dengan lempeng Eurasia di lepas pantai Sumatra, Jawa dan Nusa Tenggara, sedangkan lempeng Pasific di utara Irian dan Maluku Utara. Di sekitar lokasi pertemuan lempeng ini akumulasi energi tabrakan terkumpul sehingga lepas berupa gempa bumi. Gempa banyak menghancurkan bangunan- bangunan bertingkat yang tidak mempunyai kekuatan yang memadai. Oleh karena itu, semakin tinggi bangunan maka semakin besar pula efek gempa yang diterima oleh bangunan tersebut. Salah satu cara untuk memperoleh ketahanan terhadap respon gempa adalah menambah kekakuan pada suatu bangunan. Cara memperoleh kekakuan suatu bangunan adalah dengan memasang pengekang (bracing) untuk bangunan tinggi. Tujuan dari analisa ini dilakukan untuk mengetahui perilaku pemakaian bracing khususnya displacement. Hasil dari analisa ini menunjukkan terjadinya pengurangan simpangan horizontal gedung karena adanya penambahan rangka bracing. Selisih presentase simpangan horizontal gedung tanpa bresing dan gedung dengan menggunakan bresing X adalah 82,519%. Sedangkan selisih presentase simpangan horizontal gedung tanpa rangka bresing dan gedung dengan menggunakan bresing V adalah 64,904%.
Seismic Performance Analysis of Endo Indonesia Office Surabaya Building Structures Against Structural Irregularities Putra, Mohammad Tomita Maha; Murti, Krisna; Widayanto, Erno
JURNAL TEKNIK SIPIL Vol 13, No 1 (2024): Volume 13 Nomor 1 Mei 2024
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Syiah Kuala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24815/jts.v13i1.37050

Abstract

The structure of the building will be stable if the response of the structure is able to ignore the static and dynamic loads. The behavioral stability of the building structure is also influenced by geometry, configuration of horizontal and vertical elements, rigidity, lateral ability, and daktility of the structure. (Khanal Chaulagain, 2020). When the structure configuration of the building is irregular, there will be eccentricity which means that the center of the mass is incorrectly at the centre of rigidity (Faisal Darsono, 2019). If such conditions are not anticipated, the structure will be tortured until it eventually collapses. (Naveen dkk., 2019). In Surabaya there are office buildings that have irregular structures. This research will model the structure of the building into five variations. Each variation has a reduction in the value of structural irregularity. Next, we will examine the impact of structural irregularities on the reaction of structures of buildings. The results of the analysis showed that the irregularity of the inner angle had a significant impact on the shift of the roof, with the R-square of 0.9025 in the X axis and 0.9872 in the Y axis. Furthermore, based on the value of the soft level rigidity to the earthquake style at each level, R-quares of 0.8433 were found at the X-axis, and 0.825 at the Y-axe. Furthermore, changes in the inner angle of variations 2, 3, 4, and 5 resulted in successive increases in the mass of the structure by 0.18%, 4.09%, 7.86%, and 0.43%. These increases result in an increase in the basic sliding style in both directions. The variation 5 building designed without an inner angle showed an increase of 0.46% in the base sling style in either direction. Movement targets based on ASCE 41-13 NSP are 321.903 mm and 308.497 mm for the X and Y directions, respectively, which are in the Life Safety and Immediate Occupancy categories. While the total maximum drift values based on ATC-40 for the x and y directions are 0.0148 and 0.0150. The performance of the existing building structure is between B to C on the level of damage control (Immediate Occupancy to Life Safety), which means the building has suffered minor non-structural damage and may suffer structural damage but can still be repaired.
Factors in Improving the Safety of Railway Level Crossing Infrastructure in Indonesia Mahaputera, Kresna Bayu; Soetjipto, Jojok Widodo; Widayanto, Erno
Eduvest - Journal of Universal Studies Vol. 6 No. 2 (2026): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v6i2.52189

Abstract

Railway level crossings in Indonesia remain significant accident-prone areas, contributing to nearly 70% of total railway incidents. Various solutions have been implemented to reduce the risk of accidents at level crossings, including converting them into non-level crossings. However, selecting the most appropriate infrastructure alternative is often challenging because it involves multiple factors, making the process time-consuming and prone to conflict. This study aims to identify and rank the factors influencing improvements in level crossing infrastructure safety using a descriptive-analytical approach. Five main criteria are established in this study—safety, technical, economic, environmental, and social—which are further divided into several relevant sub-criteria based on previous literature. Data were collected through questionnaires distributed to nine expert respondents from government agencies, railway operators, and consulting firms. The results show that accident history, structural durability, maintenance costs, sustainable drainage, and traffic impacts are the most prioritized factors. These findings highlight the need for a quantitative, holistic, and multidimensional approach to decision-making, considering the high level of complexity and potential conflicts of interest among stakeholders. This research provides a foundation for formulating more objective and sustainable policies in designing future alternatives for non-level crossing infrastructure.
Co-Authors ,Aswatama, Ketut Dwi Nurtanto Dwi Wahyu Anggraeni, Dwi Wahyu Jojok Widodo Soetjipto Ketut Aswatama Wiswamitra Krisna Murti Krisnamurti Ma'arif, Achmad Zakaria Mahaputera, Kresna Bayu Mustika Hari, Hanisya Indah Putra, Mohammad Tomita Maha Santoso Mulyadi