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The Sub-Criteria for Evacuation-Based Pedestrian Route Design Parameters Veiga Mustika Agenta; Fitra Rifwan; Yosritzal Yosritzal; Purnawan Purnawan; Yossyafra Yossyafra
invotek Vol 23 No 3 (2023): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v23i3.1128

Indonesia, surrounded by three major tectonic plates—the Indo-Australian plate, the Pacific plate, and the Eurasian plate—faces a relatively high disaster risk. The city of Padang in West Sumatra, located on the western side of Sumatra Island and in proximity to tectonic plates, is particularly susceptible to earthquakes and tsunamis. To mitigate disaster risk, Padang requires evacuation-focused road infrastructure, including pedestrian paths. This study aims to assess the validity of sub-criteria parameters for creating pedestrian evacuation routes in Padang. It employs quantitative descriptive research methods, utilizing Aiken's V and Cronbach Alpha. The study involved distributing validation forms to five experts, comprising two Civil Engineering lecturers and three members of Padang City's BPBD (Regional Disaster Management Agency) specializing in Planning and Preparedness. The participants' responses, recorded through the forms, served as data for analyzing and identifying sub-criteria for evacuation-oriented pedestrian route design parameters. The study's findings reveal that one sub-criteria—Safety Fence from the Amenities parameter with a value of V = 0.7—is invalid.

Sudut Sudut Kelongsoran Tanah Pasir di Belakang Dinding Penahan Tanah Segmental Mazni, Deni Irda; Hakam, Abdul; Tanjung, Jafril; Ismail, Febrin Anas; Yossyafra, Yossyafra
Siklus : Jurnal Teknik Sipil Vol. 9 No. 2 (2023): Siklus: Jurnal Teknik Sipil
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/siklus.v9i2.15869

Dinding penahan tanah (DPT) dibangun untuk mengatasi kelongsoran. Salah satu konstruksi DPT yang sering dipakai adalah DPT segmental atau Segmental Retaining Wall (SRW) yang terdiri dari 2 tipe yaitu SRW gravity dan SRW reinforced. SRW gravity merupakan DPT yang mengandalkan berat sendiri strukturnya. SRW reinforced memakai geosintetik untuk perkuatan terhadap kestabilan dindingnya. Selama ini, analisis kestabilan SRW gravity selalu dianggap seperti DPT monolit. Selain metode analisis yang dianggap sama, pola kelongsoran tanah yang terjadi di belakang SRW juga dianggap sama, sehingga sudut kelongsoran tanah (a) uji laboratorium yang terjadi sama dengan sudut kelongsoran metoda Rankine (q=45o+f/2). Penelitian skala laboratorium dilakukan dengan beberapa skenario balok-balok SRW serta pemberian tanah pasir dan pembebanan merata (statis) di belakang SRW. Pola kelongsoran tiap skenario SRW direkam untuk mengamati sudut kelongsoran. Pola kelongsoran yang terjadi membentuk kurva S dengan persamaan fungsi polinomial pangkat tiga. Berdasarkan pengamatan terhadap beberapa skenario SRW, terlihat bahwa besar sudut kelongsoran (a) yang terjadi di dasar kurva kelongsoran sama dengan sudut geser dalam tanah pasir (f) tersebut.

KEANDALAN DAN RISIKO KENDARAAN LISTRIK MENURUT PERSEPSI PENGGUNA Rahmatika Dwi Putri Jori; Purnawan; Yossyafra
Jurnal Transportasi Vol. 24 No. 1 (2024): Jurnal Transportasi
Publisher : Forum Studi Transportasi antar Perguruan Tinggi (FSTPT)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26593/jtrans.v24i1.7650.86-100

Percepatan pertumbuhan kendaraan listrik di Indonesia terus dilakukan, namun banyak pernyataan pro kontra dikalangan masyarakat mengenai keandalan dan risiko kendaraan listrik di Indonesia. Untuk itu perlu dilakukannya survey analisa keandalan dan risiko yang dimiliki oleh mobil dan motor listrik. Pertanyaan survey disusun dengan analisa konten yang disebar kepada pengguna kendaraan listrik di Indonsia. Hasil yang didapatkan diolah dengan metode analisa faktor sehingga diperoleh faktor exterior dan performance berpengaruh terhadap keandalan mobil listrik berbeda dengan sepeda motor listrik keandalan dipengaruhi oleh tiga faktor yaitu exterior, safety dan performance. Selanjutnya untuk risiko mobil listrik sendiri dipengaruhi oleh dua faktor yaitu pengisian daya kendaraan dan dampak lingkungan sedangkan untuk sepeda motor listrik hanya dipengaruhi oleh satu faktor saja yaitu dampak lingkungan

Evaluasi Implementasi Kebijakan Tata Ruang Kawasan Perumahan Dan Permukiman Di Kota Padang Panjang Donal Catria; Melinda Noer; Yossyafra
Jurnal Niara Vol. 17 No. 1 (2024): Mei
Publisher : FAKULTAS ILMU ADMINISTRASI UNIVERSITAS LANCANG KUNING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/niara.v17i1.19880

Penelitian bertujuan untuk mengidentifikasi pelanggaran penataan ruang yang terjadi sekaligus untuk mengetahui faktor-faktor penyebab terjadinya pelanggaran sehingga dapat merumuskan masukan perbaikan terhadap implementasi kebijakan penataan ruang pada kawasan perumahan dan permukiman di Kota Padang Panjang. Analisis data dilakukan dengan superimpose/ overlay peta pola ruang dengan peta sebaran bangunan yang ada di Kota Padang Panjang, didapatkan jumlah bangunan yang melanggar sebanyak 1732 unit bangunan (10,68 % dari total jumlah bangunan yang ada ). Berdasarkan hasil kuesioner dan wawancara dengan masyarakat dan petugas pelaksana penyelenggaran penatan ruang. Dari hasil pengolahan data , dari variabel yang diukur yakni komunikasi, sumber daya, disposisi dan birokrasi didapatkan faktor birokrasi merupakan variabel paling signifikan berpengaruh terhadap pelanggaran penataan ruang di Kota Padang Panjang. Untuk selanjutnya denga mengunakan analisi SWOT dirumuskan strategi untuk memperbaiki implementasi kebijakan penataan ruang sebagai berikut, meningkatkan kualitas perencanaan dan kebijakan penataan ruang Kota Padang Panjang, meningkatkan pemahaman dan komitmen pengambil kebijakan terhadap penyelenggaraan tata ruang dan meningkatan sosialisasi berbasis digital

Strategy to Reduce the Use of Private Cars and Motorbikes to Campus to Support the Green Campus Program Kurniati, Titi; Yossyafra, Yossyafra; Amirna, Rahimmah
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 3 (2023): November 2023
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v3i3.108

The United Nation states that vehicle fuel gas emissions from the transportation sector are a significant contributor to global warming. One of the preventative steps that universities can take is to limit the use of vehicles to and within the campus environment. Andalas University as one of the largest campuses in West Sumatra is very interested in taking an active role in reducing vehicle fuel gas emissions. The first aim of this research is to observe the ratio of vehicles entering campus to the campus population, and calculate the percentage reduction in private vehicle use, in order to increase the UI green metric level. Second, identifying potential private vehicle users who will switch to using Trans Padang public transportation. Traffic volume data collection is carried out using video recordings. A questionnaire interview survey was also carried out to analyze the campus population's preference for switching to public transportation. The survey results show that the volume of vehicles entering campus is more than twelve thousand vehicles. To achieve an increase in the value of one level of the UI green metric requires a reduction in private vehicles of 63.4%. The results of the chi-square test for the variables of employment, private vehicle ownership, and monthly income influence the variable frequency of private vehicle use. Users of motorbikes, private cars, online taxis and paratransit wish to shift mode using Trans Padang, and conventional motorcycle taxi users really wish to shift mode using Trans Padang.

Analisis Kuat Geser Tanah Kohesif Menggunakan Berbagai Geosintetik Putri, Lusi Dwi; Abdul Hakam; Thamrin , Rendy; Yossyafra, Yossyafra
Siklus : Jurnal Teknik Sipil Vol. 11 No. 1 (2025): Siklus: Jurnal Teknik Sipil
Publisher : Program Studi Teknik Sipil Fakultas Teknik Universitas Lancang Kuning

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31849/siklus.v11i1.26906

Kategori tanah dasar yang tidak memadai seperti lempung yang memiliki kuat geser rendah dapat menyebabkan kerusakan bagi konstruksi, sehingga perlu diberi perkuatan salah satunya adalah dengan diperkuat geosintetik. Tujuan penelitian adalah untuk menganalisis kekuatan tanah yang diperkuat dengan geosintetik terhadap gaya geser. Geosintetik yang digunakan adalah geotekstil jenis woven, geotekstil non-woven dan geogrid. Prosedur yang digunakan adalah pengujian fisik tanah serta pengujian geser langsung. Tanah lempung yang digunakan berasal dari Kota Pekanbaru, Provinsi Riau. Lempung yang diuji dikategorikan sebagai lean clay anorganik (CL) dengan plastisitas sedang. Kadar air sebesar 26,25%, batas cair sebesar 41,54%, batas plastis sebesar 21,54%, berat jenis sebesar 2,653, berat isi sebesar 18,69 kN/m³ dan indeks plastisitas sebesar 20,0%. Sudut gesek internal sebesar 2,66 dan kohesi sebesar 0,42. Sudut gesekan tanah dan geosintetik dari uji geser langsung laboratorium, tanah dengan geotekstil woven ϕ = 30,780°, dan kohesi antarmuka (ca) adalah 0,1309 kg/cm2, tanah dengan geotekstil non-woven ϕ = 37,26°, dan kohesi antarmuka (ca) adalah 0,4332 kg/cm2, tanah dengan geogrid ϕ = 44,330° dan kohesi antarmuka (ca) adalah 0,5929 kg/cm2. Hasil pengujian menyimpulkan bahwa geogrid memberikan nilai kohesi antar muka dan kekuatan geser yang lebih besar dibandingkan geotekstil karena mekanisme interlock (saling mengunci) partikel tanah ke dalam jaring-jaring geogrid lebih efektif dibandingkan hanya dengan kontak gesekan pada geotekstil.

Traffic Performance Optimization at Batanghari Intersection Using Microsimulation Ghalib, Kenny; Yossyafra, Yossyafra; Purnawan, Purnawan
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 9, No 1 (2024): EDISI MARET 2024
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v9i1.5650

The Batanghari 1 Bridge serves as a vital link connecting Jambi City and Muaro Jambi Regency. Currently, the traffic density at the Batanghari intersection is notably high, particularly during peak hours, resulting in frequent traffic jams. To address this issue, the Perencanaan dan Pengawasan Jalan Nasional (P2JN) and Planning Consultants executed a Detailed Engineering Design (DED) Planning for the Duplication of the Batanghari 1 Bridge in 2021. The Duplication DED transformed the original intersection into a combination of an intersection and a U-turn. However, a notable challenge emerged during rush hours, especially for Jalan KH.A. Majid, where a U-turn is essential to cross the Batanghari Bridge. In this study, a traffic microsimulation was initiated at the Batanghari intersection. Using PTV Vissim software, microsimulations were conducted under three scenarios: Existing Condition, Detailed Engineering Design (DED), and an Alternative scenario, which involved incorporating a Flyover for KH.A. Majid Road towards Batanghari Bridge. Furthermore, traffic microsimulations were conducted to anticipate conditions over the next two decades. The analysis involved microsimulation using Vissim software, encompassing calibration, trial and error validation of the intersection model considering driver behavior, and GEH tests on traffic volume. The microsimulation results at the Batanghari intersection revealed that the alternative model effectively reduced queues, minimized delay times, and improved overall travel time compared to the proposed model.

Strategy to Reduce the Use of Private Cars and Motorbikes to Campus to Support the Green Campus Program Kurniati, Titi; Yossyafra, Yossyafra; Amirna, Rahimmah
Andalasian International Journal of Applied Science, Engineering and Technology Vol. 3 No. 3 (2023): November 2023
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/aijaset.v3i3.108

The United Nation states that vehicle fuel gas emissions from the transportation sector are a significant contributor to global warming. One of the preventative steps that universities can take is to limit the use of vehicles to and within the campus environment. Andalas University as one of the largest campuses in West Sumatra is very interested in taking an active role in reducing vehicle fuel gas emissions. The first aim of this research is to observe the ratio of vehicles entering campus to the campus population, and calculate the percentage reduction in private vehicle use, in order to increase the UI green metric level. Second, identifying potential private vehicle users who will switch to using Trans Padang public transportation. Traffic volume data collection is carried out using video recordings. A questionnaire interview survey was also carried out to analyze the campus population's preference for switching to public transportation. The survey results show that the volume of vehicles entering campus is more than twelve thousand vehicles. To achieve an increase in the value of one level of the UI green metric requires a reduction in private vehicles of 63.4%. The results of the chi-square test for the variables of employment, private vehicle ownership, and monthly income influence the variable frequency of private vehicle use. Users of motorbikes, private cars, online taxis and paratransit wish to shift mode using Trans Padang, and conventional motorcycle taxi users really wish to shift mode using Trans Padang.

Application of Rescaled Adjusted Partial Sums (RAPS) Method in Validation of Traffic Management Risk Analysis Data in Large Cities in Indonesia Oktaviani, Oktaviani; Purnawan, Purnawan; Yossyafra, Yossyafra; Adji, Bayu Martanto
invotek Vol 25 No 1 (2025): INVOTEK: Jurnal Inovasi Vokasional dan Teknologi
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/invotek.v25i1.1265

This study examines the application of the Rescaled Adjusted Partial Sums (RAPS) method in validating traffic management risk analysis data in the category of large cities in Indonesia. The RAPS method is used to test the consistency and reliability of data that is the basis for traffic management risk analysis, so that it can ensure the validity of the risk assessment results. Data validation is very crucial in traffic management risk analysis to ensure the accuracy and reliability of the analysis results that are the basis for decision making. In order for the implementation of traffic management to be in accordance with the goals and objectives, traffic management analysis is needed to minimize the risk of failure of the implementation. Traffic management risk analysis in this study uses the Failure Modes, Effects and Criticality Analysis (FMECA) method. The data used are based on the results of filling out questionnaires from respondents, in the form of an assessment of three components, namely severity, occurrence, and detection for four indicators (road capacity, side obstacles, traffic conflicts, and traffic signs/markings) which have sub-indicators of the existing negative impacts. The data were validated to see the consistency of the data provided by respondents using the RAPS method. The results of the validation test using the RAPS method show that the data from the assessment of three components for four indicators that have sub-indicators of negative impacts are valid. And the test results show that the RAPS method is effective in identifying consistent and inconsistent data, thereby improving the quality of risk analysis data validation. With better validation, traffic management risk analysis can be carried out more precisely and efficiently.

Analysis of Factors Affecting the Quality Achievement of Road Preservation Work on the Long Segment Scheme of National Roads in West Sumatra Gusman, Gusman; Yossyafra, Yossyafra; Yosritzal, Yosritzal
ASTONJADRO Vol. 14 No. 3 (2025): ASTONJADRO
Publisher : Universitas Ibn Khaldun Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32832/astonjadro.v14i3.18021

The long segment road preservation scheme represents the government's effort to achieve strategic objectives for well-maintained roads and standards across the segments. Initially, all national road maintenance programs were implemented through self-management by individual road segment managers or Project Implementation Units (PPK), utilizing a conventional contract system executed periodically and focusing solely on the primary works for the effective road length. Routine maintenance of functional lengths was conducted by service users through self-management. Currently, the long segment road preservation scheme is set to replace conventional/self-management contracts, with the expectation of addressing longstanding issues. However, in practice, the implementation of the long segment road preservation projects still encounters challenges, as evidenced by instances of project delays resulting in penalties, substandard construction quality, and overdue project completion. Therefore, this research aims to identify the variables influencing the quality achievement of the long segment road preservation scheme and to ascertain which factors have the most significant impact. Utilizing the Delphi method, we gathered experts with relevant expertise in national road preservation under the long segment scheme in West Sumatra and collected their opinions. Based on the results of our survey, the factors deemed most significant by the experts affecting the quality achievement of the long segment road preservation are material factors, followed by equipment factors, quality testing standards, labor factors, and finally, work method factors. Consequently, several aspects warrant attention in future long segment road preservation projects to ensure quality achievement, including: (1) Utilizing materials that meet quality requirements, (2) Ensuring the suitability of the heavy equipment used, (3) Conducting regular calibrations of the Asphalt Mixing Plant (AMP) and other quality testing equipment, (4) Enhancing labor skills through various training programs, and (5) Adjusting work methods to align with other quality standards.

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