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All Journal Jurnal Ilmiah Rekayasa Sipil Sprocket : Journal of Mechanical Engineering Jurnal Komposit : Jurnal Ilmu-Ilmu Teknik Sipil Jurnal Visi Eksakta PROFICIO: Jurnal Pengabdian Masyarakat
Pasaribu, Humisar
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Analisis Struktur Portal Bidang Dengan Beban Lateral Menggunakan Metode Elemen Hingga Pasaribu, Humisar; -, Bartholomeus
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 4 No 2 (2023): Edisi Februari 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v4i2.927

Abstract

It is necessary to carry out a safety and comfort inspection of the existing wharf structure to ensure the facility’s service life. To check the safety and comfort, it is necessary to do a structural analysis. In the world of civil engineering, there are many problems in analyzing structures that need to be analyzed for working loads or assessing the existing wharf structures that are loaded by ship berthing loads and loads on the floor plates. This research is limited by conducting research on port ports that are burdened with berthing loads. The results of this study are deformation at the nodes in the horizontal and vertical directions of the global and local axes. Based on the analysis carried out, a maximum horizontal deformation of 4.363 cm is obtained and is less than 0.5% H (or 7.4 cm) as required in SNI 8460:2017. Thus, it can be concluded that the structure can still bear the impact of a ship weighing 30,000 DWT.
Simulasi CFD Distribusi Temperatur pada Pengering Biji Kopi dengan Sistem Konveksi Paksa Pasaribu, Humisar; Lumbangaol, Partahi; Napitupulu, Richard A.M; Siagian, Parulian; Siagian, Horas S; Setyawan, Eko Yohanes
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 5 No 1 (2023): Edisi Agustus 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v5i1.1214

Abstract

Drying is a mass transfer and heat transfer process that is strongly influenced by temperature and air velocity. The importance of analyzing the temperature distribution and air velocity is expected to be used as a reference to optimize the drying process to be faster and better. This study aims to analyze the temperature distribution and air velocity that occurs in a coffee bean dryer with a forced convection system using CFD simulation. CFD simulations are carried out using ANSYS Fluent software. with steady conditions, and using a pressure-based solver method. The obtained temperature distribution occurs with an estimated absorber temperature difference with the drying chamber is 31% during the day.
Review Kapasitas Daya Dukung Dan Tinjauan Waktu Pelaksanaan Bore Pile Pada Pembangunan Jembatan Jalan Bebas Hambatan Binjai Pangkalan Brandan Saragi, Yetty; Pasaribu, Humisar; Saragi, Tiurma; Simanjuntak, Johan Oberlyn; Hutagalung, Bartholomeus; Simanjuntak, Salomo
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 5 No 1 (2023): Edisi Agustus 2023
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v5i1.1225

Abstract

In the Sei Wampu Bridge work project, Binjai Pangkalan Brandan carried out bore pile foundation installation work at the A2 foundation point with a total of 21 piles. Review of the bearing capacity of bore pile foundations using Analysis from Meyerhof (1956) and the Converse-Labarre Formula method for the calculation of pile group efficiency. The time of completion of work based on the time schedule plan is 125 calendar days. This research conducted a review using the Critical Chain Project Management (CCPM) method to obtain time efficiency, so that the project can be carried out on time. From the results of analysis and discussion, it was obtained that the largest foundation carrying capacity was the result of laboratory data using method C. Significant differences in results were obtained, especially laboratory data due to the correlation value used in each method. The result of calculating the bearing capacity of the foundation based on the method of Luciano Decourt (1987) using N-SPT data is 287,600.76 kN; Meyerhof's (1956) method using N-SPT data is 265,062.68 kN; a combination of Meyerhof's method (1976), Vesic's method (1977); the combination of the Vesic method (1977), the Coyle and Castello method (1981) and the results of foundation carrying capacity analysis using the All Pile program is 41,159.85 kN. The Critical Chain Project Management method is defined as the longest chain of interrelated events, where the linkage lies in the work or resources that are interconnected with each other, by cutting 50% of the duration of the work and replacing it as a buffer. The time comparison obtained from the calculation results using the CCPM method obtained a time efficiency of 116 days with a work time difference of 7.2% or about 9 days from the existing duration of the previous 125 days, while to compare the results of the CCPM method, calculations were carried out based on realization for 97 days, where the realization results were smaller than using the CCPM method and time schedule plan. Keywords : Bore pile, Carrying capacity, Time review
Analisis Struktur Dermaga Tipe Jetty Terhadap Beban Tumbukan Kapal Dengan Memperhitungkan Pengaruh Pasang Surut Menggunakan Metode Slope-Deflection Pasaribu, Humisar; Sirait, Kevin Febrian
SPROCKET JOURNAL OF MECHANICAL ENGINEERING Vol 7 No 2 (2026): Edisi Februari 2026
Publisher : Program Studi Teknik Mesin, Universitas HKBP Nommensen, Medan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36655/sprocket.v7i2.2153

Abstract

Dermaga tipe jetty merupakan infrastruktur pelabuhan yang berperan penting dalam mendukung aktivitas bongkar muat kapal, sehingga diperlukan perencanaan struktur yang mampu menahan beban lingkungan dan operasional secara aman. Salah satu faktor lingkungan yang berpengaruh signifikan adalah fluktuasi elevasi muka air laut akibat pasang surut, yang dapat memengaruhi distribusi beban, tekanan hidrostatis, dan deformasi struktur dermaga. Penelitian ini bertujuan untuk menganalisis respons deformasi struktur dermaga tipe jetty terhadap beban tumbukan kapal (berthing load) dengan mempertimbangkan pengaruh pasang surut air laut, serta membandingkan hasil analisis menggunakan metode slope-deflection dengan simulasi perangkat lunak komputer. Analisis dilakukan pada struktur portal dua dimensi dengan beban berthing kapal peti kemas berkapasitas 40.000 DWT sebagai beban rujukan. Tiga kondisi pembebanan dianalisis, yaitu kondisi berthing tanpa tekanan hidrostatis, kondisi berthing dengan tekanan hidrostatis pada saat pasang (High Water Level/HWL), dan kondisi berthing dengan tekanan hidrostatis pada saat surut (Low Water Level/LWL). Hasil perhitungan menunjukkan bahwa deformasi struktur terbesar terjadi pada kondisi berthing tanpa pengaruh tekanan hidrostatis, sedangkan kondisi HWL menghasilkan deformasi paling kecil. Selisih deformasi antara kondisi pasang dan surut sebesar 2,83% untuk metode slope-deflection. Perbandingan dengan hasil simulasi komputer menunjukkan perbedaan rata-rata deformasi sebesar 2,168%. Hasil penelitian ini diharapkan dapat menjadi acuan teknis dalam perencanaan dermaga yang lebih adaptif terhadap kondisi pasang surut dan dinamis lingkungan perairan.
Co-Authors -, Bartholomeus Bartholomeus Bartholomeus Hutabarat, Torang Hutagalung, Bartholomeus Lumbangaol, Partahi Manalu, Indah Sari Panjaitan, Resinanta Pardede, Maruli Purba, Luki Hariando Richard A M Napitupulu Saragi, Tiurma Saragi, Tiurma Elita Saragi, Yetty Saragi, Yetty Riris Saragi, Yetty Riris R Setyawan, Eko Yohanes Siagian, Horas S Siagian, Parulian Sianipar, Ricki A H Sidabutar, Ros Anita Silaban, Arnita Silalahi, Rohani Simanjuntak, Johan Oberlyn Simanjuntak, Salomo Simanungkalit, Okto Simbolon, Rido Parulian Sirait, Kevin Febrian Sitorus, Sriyanti Tambunan, Anggie