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Semesta Teknika
Published by Universitas Muhammadiyah Yogyakarta
ISSN : 1411061X     EISSN : 25025481     DOI : https://doi.org/10.18196/st
Core Subject : Engineering,
Engineering
SEMESTA TEKNIKA is a reputable refereed journal devoted to the publication and dissemination of basic and applied research in engineering. SEMESTA TEKNIKA is a forum for publishing high quality papers and references in engineering science and technology. The Journal is published by the Faculty of Engineering, Universitas Muhammadiyah Yogyakarta, INDONESIA. Copyright is by the publisher and the authors. The Journal is issued in electronic form and also issued in printed form as annual volume for the contributors only. The journal contains original research papers, review articles, short notes and letters to the editors. The topics of interest include modeling, experimental, analytical and numerical investigations on the mechanical, physical, chemical and mineralogical properties of material, developing the prototype/instrument, technology and construction process. Topic of management in industry and civil construction is also considered. SEMESTA TEKNIKA receives manuscripts from the contributor written in the Indonesian and English. Manuscripts submitted to the journal for publication must not have been previously published or is under consideration simultaneously by any other publication. Manuscripts submitted to SEMESTA TEKNIKA will be reviewed Peer Reviewers local and foreign.
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Articles 715 Documents
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Modeling’s Effect of Irregular Building Structure with Vegetated Roof on Seismic Evaluation per ASCE 41-17 Fathurrachman, Muhammad Puja; Satyarno, Iman; Sulistyo, Djoko
Semesta Teknika Vol. 27 No. 2 (2024): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v27i2.22775

Abstract

This study examines the seismic vulnerability of an irregular educational building with a vegetated roof in Yogyakarta using linear procedures based on ASCE 41-17. Modelling approaches differ Model 1 treats skylights and planter boxes as loads with straight roof slabs, while Models 2 and 3 use shells with sloping roof slabs. Vegetated roofs are featured in Models 1 and 2. The analysis, conducted at seismic hazard levels BSE-1N and BSE-2N using the ETABS program, evaluates structural components and compares Response Spectrum (RS) and Linear Time History (LTH) methods. Results show seismic weight variations of 1.20% to 15.04% between models. Model 1 fails to meet the criteria for modal analysis, while Models 2 and 3 do. The structural performance evaluation based on average demands at BSE-1N and BSE-2N levels varied from Immediate Occupancy to Life Safety performance. The LTH method in all models had higher acceptance ratios than the RS method.
Integration of RISHA and Eco-Damper Prevents Earthquake Damage to Houses Sugiarto, Amalia Rizka; Saripudin, Mochamad Malik Abdulah
Semesta Teknika Vol. 27 No. 2 (2024): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v27i2.22940

Abstract

This research introduces an eco-damper building concept integrating Simple Healthy Instant House (RISHA) technology with reclaimed vehicle tires to enhance earthquake resistance in Indonesian residential buildings. Many earthquake-resistant building designs currently focus on structural reinforcement but overlook sustainable materials and cost-effectiveness, creating a gap in addressing environmental and disaster resilience. This study addresses this gap through a literature review and a conceptual design approach, identifying RISHA technology's strengths, limitations, and potential applications combined with eco-damper systems. The research found that integrating RISHA and recycled rubber from vehicle tires offers a comprehensive solution that enhances earthquake resistance while promoting sustainability and energy efficiency. The eco-damper system introduces a novel approach compared to earthquake-resistant technologies and contributes positively to environmental preservation by utilizing waste materials. However, one of the identified challenges is ensuring consistent material quality from used tires and the need for proper disposal or repurposing of other waste materials associated with this method. This study significantly contributes to disaster risk reduction in Indonesia. At the same time, the eco-damper concept also shows potential scalability for use in other earthquake-prone regions, offering a sustainable and adaptable solution.
Design of a Corn Thresher and Corn Cob Chopper Using the Pahl & Beitz Method Unria, Habibah Isna; Hamdy, Muhammad Ihsan; Yola, Melfa; Nurainun, Tengku; Anwardi, Anwardi
Semesta Teknika Vol. 27 No. 2 (2024): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v27i2.23322

Abstract

The manual corn threshing process by farmers can slow down the processing and subsequent rotation of corn and affect the quality of the corn. In addition, waste from corn processing is not utilized correctly, so processing is needed. This study aims to design a corn threshing tool and corn cob shredder and to make the processing time more efficient so that the productivity and economy of farmers increase. The design method used is Pahl & Beitz, with four stages: planning and explaining tasks, designing product concepts, designing product shapes and details. The most recovered concept was produced based on the design method: concept variant 2. The corn threshing tool and corn cob shredder designed with a 240 kg/hour capacity can make the processing time more efficient. This is known from the results of testing. The tool can thresh 4 kg of corn in 1 minute, and corn cob waste is automatically chopped into powder that can be used as animal/poultry feed.
The effect of welding time on the tensile load capacity of dissimilar-metal stainless steel-carbon steel TIG-Spot welded joint Nugroho, Aris Widyo; Prayitno, Hadi; Rahman, Muhammad Budi Nur
Semesta Teknika Vol. 27 No. 2 (2024): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v27i2.24748

Abstract

This study examines the influence of welding time on the tensile load capacity of spot TIG welds using stainless steel and low carbon steel plates (100 mm × 30 mm × 0.8 mm) as per AWS D8.9 standards. A constant welding current of 90 A was applied, with 2-, 3-, 4-, and 5-seconds welding times. Tensile properties, microstructure, and hardness were analyzed using a universal tensile machine, an optical microscope, a scanning electron microscope, and a Vickers hardness tester. Results show that the tensile load capacity increases with welding time, peaking at 4 seconds (≈4300 N), before dropping significantly at 5 seconds (≈4000 N) due to overheating, which weakens the joint. The findings highlight the critical role of optimizing welding time to maximize joint strength while preserving the material's microstructure. Overextended welding times compromise performance, emphasizing the balance required for achieving durable welds.
A Bibliometric Review of the Dam Construction Impact Fata, Nurul; Ikhsan, Jazaul
Semesta Teknika Vol. 27 No. 2 (2024): NOVEMBER
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/st.v27i2.24852

Abstract

Dams are crucial constructions for managing water supplies. However, the detrimental environmental effects of dam development have also drawn criticism. The influence of dam construction over the past fourteen years and new research trends are included in this study.  This study aims to determine how many papers have been produced, how productive researchers are, and chart the evolution of dam impact publications. The analysis showed that 1312 publications related to the topic discussed were generated. The findings demonstrated that engineering and environmental studies were the main focus of research trends concerning the effects of dam development. This study provides an overview of the trends in the direction of existing literature for future research, and evaluation of research topics through existing topic clusters. China, the USA and the United Kingdom are the three leading countries in dam construction impact research in terms of publications.

Page 72 of 72 | Total Record : 715

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