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All Journal Seminar Nasional Aplikasi Teknologi Informasi (SNATI) Civil Engineering Journal Media Komunikasi Dunia Ilmu Sipil (MoDuluS) Indonesian Journal of Engineering Research IIJSE
Widi Hartono
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Economics, Econometrics & Finance Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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MIX Design Beton Metode SKSNI dan ACI dengan Bantuan Bahasa Pemrograman Komputer Widi Hartono
Seminar Nasional Aplikasi Teknologi Informasi (SNATI) 2004
Publisher : Jurusan Teknik Informatika, Fakultas Teknologi Industri, Universitas Islam Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This paper presented computer programming of concrete mix design used Microsoft®Visual Basic™: NCMD. The procedures use by this computer program are based on SKSNIand ACI method of concrete mix design. The method was developed for use with cement,aggregates, and water, which conform to the relevant Indonesian and American standard.However since this standards lay down requirements which materials must meet in order tobe suitable for good quality concrete, the procedures of SKSNI and ACI method can beapplied to concrete mix design generally. The object of this computer program is to find theproprotions in which the concrete material - cement, water, fine aggregate, and coarseaggregate - should be combined in order to provide the specified strength, workability,durability, and possibly meet other requirements, as listed in standard such the SKSNI andACI standard.Keywords: mix design, concrete, computer programming, visual basic™.
Activity and Time Value of Public Passenger Transportation Users During the Covid-19 Pandemic in 2020 (Bus of Batik Solo Trans Corridor 4 in Surakarta) Amirotul Musthofiah Hidayah Mahmudah; Syafi’I; Dewi Handayani; Slamet Jauhari Legowo; Widi Hartono
Indonesian Journal of Engineering Research Vol 2 No 2 (2021): Indonesian Journal of Engineering Research
Publisher : Future Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11594/10.11594/ijer.02.02.01

Abstract

The Covid-19 pandemic in 2020 has a significant impact on all countries' social and economic conditions, including Indonesia. It is fitting that social and economic changes also affect the transportation sector. The value of economic benefits in one public facility operation also depreciated due to the economic recession. One of the variables that can be reviewed is the time value of public passenger transportation users (AUP) to measure how much depreciation has occurred. This study specifically for travel is learning, using the bus mode Batik Solo Trans (BST) Corridor 4. Development of scenarios for questionnaires with stated preference methods, using the choice mode between motorbikes and AUP as an option, and the mode utility is approached with the equation multiple linear regression. The results of the analysis show that the time value of the user in the fleet is IDR 274.67 / hour for a distance of 8.35 km and the Time Value for a distance of 13.0 km = IDR 240.82 / hour with a Value of Activity (VoA) which is close to zero because the activity in the fleet has no financial value. This time value is considerably smaller than the AUP time value with the same intention of trip, studying, which was analyzed in 2015, which was IDR 4,708 / hour.
Potensi Aplikasi Bambu Sebagai Bahan Peredam kebisingan Operasional Kereta Api dengan Menggunakan Model Kristal Sonik Persegi Handayani, Dewi; Hartono, Widi; Nuha Fadhilah, Sarah
Media Komunikasi Dunia Ilmu Sipil (MoDuluS) Vol 6 No 1 (2024)
Publisher : Universitas Veteran Bangun Nusantara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32585/modulus.v6i1.5530

Abstract

Noise is the unwanted sound of a business or activity at a certain level and time that can cause disturbances to human health and environmental comfort. One of the transportation activities that can cause high noise is train. The effort to reduce the noise caused by the train is to build a noise-absorbing building in the form of sonic crystals. This research aims to analyze the potential application of bamboo with a square sonic crystal model as a noise reducer for railway activities. This research method is an experimental method using the method of Ministry of Environment No. 48 of 1996. The noise absorber is made of bamboo-based material arranged with a three-layer square lattice type, a diameter of 8.7 cm ± 0.2 cm, and a height of 2 meters. From the results of this study, it was found that the day and night equivalent noise level (LSM) using the barrier was 90.70 dB, 91.20 dB, 92.09 dB at a distance of 1, 2, and 3 meters. The potential of square lattice bamboo-based sonic crystals as a building damper can reduce the noise level by 8.87 dB (8.91%). Bamboo with this square lattice can be an alternative noise dampening building in the residential area around the railroad.
Safety Risk Assessment Model for Bridge Construction Hartono, Widi; Kristiawan, Stefanus A.; Handayani, Dewi; Sutopo, Wahyudi
Civil Engineering Journal Vol 11, No 1 (2025): January
Publisher : Salehan Institute of Higher Education

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28991/CEJ-2025-011-01-010

Abstract

In Indonesia, construction accidents have occurred during the construction of bridges and elevated roads, peaking in 2017. The lifting of girder beams has failed in several construction projects, and the formwork has failed during pier construction. The reasons for these work accidents are human and equipment factors, which caused material losses and loss of life. A risk assessment model for bridge construction work accidents in construction projects is proposed in this paper, with the work breakdown structure (WBS), risk breakdown structure (RBS), analytic hierarchy process (AHP), and rating being integrated to assess the risk of bridge construction work accidents. This model is expected to improve safety in bridge construction by providing effective safety planning, especially in the accident risk assessment process. The study results indicate that the WBS and RBS can outline and explain the identification of construction safety risks for bridges and provide insight into the interrelationship of construction phases and the potential risks. The relationship between the WBS and RBS is created in the form of a coupling matrix, and we identify the potential risky activities at each phase and the corresponding construction phases. The AHP can be used to calculate the weights and priorities of the WBS and analyze the magnitude of the risk index for its related risky activities; then, the rating method can be used to analyze the risk index. Girder and diaphragm installation work involves a high risk of workers falling during the erection of girders. Doi: 10.28991/CEJ-2025-011-01-010 Full Text: PDF
Review of Subcontractor Selection Criteria in Construction Services Using Analytic Network Process (ANP) - Benefit Cost Risk (BCR) Susetyo Rohadi; Widi Hartono; Dewi Handayani; Andi Dwi Putranto
Indonesian Interdisciplinary Journal of Sharia Economics (IIJSE) Vol 8 No 1 (2025): Sharia Economics
Publisher : Universitas KH. Abdul Chalim Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31538/iijse.v8i1.5835

Abstract

To develop effective techniques for selecting subcontractors, this research set out to determine which factors should take precedence and which alternatives may be useful in terms of BCR, benefits, costs, and risks. Based on the results Project managers, control managers, procurement bureau managers, production managers, finance bureau managers, and employees/staff directly related to procurement activities (i.e., procurement staff) were randomly selected to participate in in-depth interviews and questionnaires to gather data for the study of subcontractor selection criteria in construction services. Analytical Network Process (ANP) using BCR network structure methodology is used to analyze the data in this study. Benefit, Cost, and Risk (BCR) study of the subcontractor selection process yielded the following results: control criteria. As a result, the decision-making process for choosing subcontractors shifts its focus to other technical competency factors, which might provide advantages.
Co-Authors Adi Yusuf Muttaqien Afrinur Winursito Ardi Agus Prijadi Saido Ahmad Muali Alfichri Dilian Yanuar Agus Putri Amirotul Musthofiah Hidayah Mahmudah Andi Dwi Putranto Andreawan Setyo Nugroho Anggraeni, Elisabeth Riska Anisa' Wahyu T.U. Ardyan Reza Himawan Arif Fitria Arniati, Apriliani Nur Artanto, Abdjad Agung Arum Destyarini Delan Soeharto Derry Handoko Purba Dewi Handayani Dewi Handayani Dewi Handayani Dewi Handayani Dwi Rahmawati Faizah Edo Maharu Endar Pancaningrum Eva Kumala Wikan Prasodjo Fajar Julian Santosa Fajar Ridwansyah Fakhri Firdaus Fika Giri Aspia Ningrum Firdausy, Sabila Fitria Nur Laili Hartanty Utami Hartomo, Christianto Ida Ayu Putu Sri Widnyani Ineke Bela Ramdani Irla Gabriela Arya Jeesica Hermayanti Pratama Khalifah, Suciati Nur Kristiawan, Stefanus A. Laksono Trisnantoro Lanjari, Lanjari Larto Larto Lilik Kurniawan Lutfiana Nurhidayah Maharani Kurnia Putri MAN Kork Monica Andhina Monica Tanskanovia Magna Muchacha Mufti, Muchacha Muhammad Hammam Hammam Rassya Mulyarko, Lazuardi Gagah Murdoko, Bayu Ari Muttaqien, Adi Yusuf Novita Anggraeni Novita Putri Utami Nuha Fadhilah, Sarah Nurul Fatimah Prakoso, Indra Tri Pranestika, Kameliana Ravesa Rahma Ori Ophelia Rahma, Diyar Rahmah, Hanan Nur Resti Artha Mahestika Senot Sangadji Shandra Shapeka Sheiza Ahryko Adelino Sitcha Atat Nurmufti Siwi R, Pangestuti Slamet Jauhari Legowo SLES Sabry Sobriyah Sobriyah Sri Cipto Purnomo Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sugiyarto Sukho Baskoro Sunarmasto Sunarmasto Sunarmasto, Sunarmasto Susetyo Rohadi Syafi’I Vina Putri Cahyarini Visaretri Pramuktia Purwosri Wahyu Prasetya Ady Candra Wahyudi Sutopo Wardani, Paula Karisma Yoka Raditya Ranu Prana Yopi Saparudin Yunita Purwandari