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Tulus Widiarso
Universitas Trisakti
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IDENTIFIKASI KESELARASAN PRINSIP POLA DAN BENTUK BIOMORFIK PADA ARSITEKTUR BIOFILIK DENGAN PENGEMBANGAN BANGUNAN MIXED-USE Nur Syah, Azzahra; Inavonna, Inavonna; Wijayanto , Punto; Widiarso, Tulus
Metrik Serial Humaniora dan Sains Vol. 6 No. 1 (2025): April 2025
Publisher : Konsorsium Cendekiawan Indonesia

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Abstract

Pengembangan Bangunan Mixed-Use pada Kawasan sebagai penunjang terkait fasilitas umum serta fasilitas sosial dalam menghidupkan suatu Kawasan. Dalam konteks pengembangan bangunan mixed-use pada Kawasan dengan menggunakan pendekatan arsitektur biofilik yang memfokuskan pada prinsip pola dan bentuk biomorfik. Sebagaimana prinsip ini menentukan terkait pembentukan pola serta tekstur pada lingkungan serta menjadi komponen dekoratif dalam pengembangan desain masif. Artikel ini membahas terkait keselarasan pengembangan rancangan bangunan mixed-use dengan prinsip pola dan bentuk biomorfik. Melalui analisis studi kasus serta tinjauan literatur pada artikel ini, memberikan tujuan dalam penambahan wawasan terkait penerapan prinsip pola dan bentuk biomorfik pada bangunan mixed-use.
Cost Analysis of Construction Using the Cost Significant Model and Artificial Neural Network or Feasibility Study Cost Estimation in Process Industry (Case Study: Feasibility Study Projects in the Process Industry Sector in Indonesia) Fajar, Isma; Zaki, Muhammad; Pontan, Darmawan; Widiarso, Tulus
Eduvest - Journal of Universal Studies Vol. 5 No. 7 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i7.50381

Abstract

The process industry plays a vital role in the global economy, with increasing complexities requiring significant capital investment for projects. Accurate cost estimation in the early stages is critical to avoid cost overruns, delays, and poor quality. During the feasibility study phase, accurate cost estimation is crucial for project success. This study employs the cost significant model (CSM) to identify key cost elements influencing the total construction cost and compares the model's accuracy with actual costs in 50 process industry projects in Indonesia from 2010 to 2024. Artificial Neural Networks (ANN) with backpropagation are also used to validate the model and calculate the Mean Absolute Percentage Error (MAPE) for accuracy assessment. Analysis identifies significant cost components such as Mechanical ISBL (55.89%), Mechanical OSBL (7.65%), Electrical (6.06%), and Superstructure (15.07%), collectively contributing 84.66% of total costs. ANN-ALL achieves the highest accuracy (L: -4.76%, H: 0.55%), followed by CSM Model 3, ANN-CSM, and others, as per AACE International guidelines. Models exceeding Class 4 benchmarks are unsuitable for feasibility studies. Data analysis combines regression using SPSS and ANN modeling with MATLAB, highlighting the ANN-ALL model's superiority in cost estimation accuracy.
IDENTIFIKASI PENERAPAN PRINSIP-PRINSIP ARSITEKTUR KONTEKSTUAL PADA BANGUNAN FUNGSI CAMPURAN Fajar Isnaini, Rohimah; Widiarso, Tulus; Sindhu Pribadi , I.G Oka
Metrik Serial Humaniora dan Sains Vol. 6 No. 1 (2025): April 2025
Publisher : Konsorsium Cendekiawan Indonesia

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Abstract

Bangunan fungsi campuran telah ada sejak era 1960-an dan terus berkembang mengikuti dinamika kota. Dalam perkembangannya, prinsip arsitektur yang diterapkan tidak selalu sama, tergantung konteks sosial, budaya, dan lingkungan pada masing-masing masa. Penelitian ini bertujuan untuk mengidentifikasi perbedaan penerapan prinsip arsitektur kontekstual pada bangunan fungsi campuran lintas waktu. Metode yang digunakan adalah analisis deskriptif kualitatif berbasis data sekunder terhadap tiga studi kasus di Jakarta: Sarinah Building (1960-an), Wisma Dharmala Sakti (1990-an), dan Tamansari Hive (2020-an). Hasil menunjukkan kesamaan pada prinsip permeability, robustness, dan personalization, serta perbedaan yang spesifik pada aspek richness, legibility, dan variety sesuai dengan zamannya. Keterbatasan penelitian ini adalah tidak dilakukannya studi lapangan, sehingga belum mencakup persepsi pengguna secara langsung. Studi lanjutan disarankan untuk melibatkan observasi, wawancara, dan survei agar mampu menggali keterkaitan antara prinsip desain dan pengalaman ruang secara lebih mendalam.
Implementasi Konsep Net Zero Healthy Pada Bangunan Sekolah Antoni, Febri; Kusumawati, Lili; Kurniyaningrum, Endah; Pontan, Darmawan; Widiarso, Tulus
Jurnal Locus Penelitian dan Pengabdian Vol. 4 No. 6 (2025): JURNAL LOCUS: Penelitian & Pengabdian
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v4i6.4268

Abstract

This study aims to evaluate the implementation of the Net Zero Healthy (NZH) concept in a total school rehabilitation project in DKI Jakarta Province, as an effort to develop energy-efficient buildings that also promote physical health and thermal comfort for occupants. Employing a qualitative case study approach, data were collected through in-depth interviews, field observations, document analysis, and questionnaires from building users. The results indicate that solar panels effectively supplied 15% of the school’s total energy needs, although constrained by regulations. Furthermore, all working spaces met the minimum standards for natural ventilation and daylighting based on ASHRAE and Indonesian national standards. Mechanical ventilation through fans also performed optimally, supplying fresh air significantly above the required minimum. These findings demonstrate that NZH principles can be effectively applied to public building projects by considering design, technology, and user behavior. This research contributes significantly to green building policy development and national emission reduction efforts.
Pengolahan Sampah Terpadu Dengan Konsep Waste To Energy Di Smart City IKN Rose, Ugahari; Kusumawati, Lili; Kurniyaningrum, Endah; Pontan, Darmawan; Widiarso, Tulus
Jurnal Locus Penelitian dan Pengabdian Vol. 4 No. 6 (2025): JURNAL LOCUS: Penelitian & Pengabdian
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v4i6.4269

Abstract

In the context of the development of Indonesia’s new capital city in East Kalimantan, waste management presents increasingly complex challenges. Due to limited existing infrastructure, unintegrated waste management can lead to groundwater contamination, vegetation cover degradation, and threats to local biodiversity. This study aims to evaluate the implementation of an integrated waste treatment system combined with Waste to Energy (WtE) technology in the Capital City Area. Data were collected through direct observation and interviews with relevant stakeholders to measure the operational performance of the system. Field measurements included emissions analysis, energy production, and waste volume reduction. Based on a 15-day observation period in December 2024, thermal treatment produced only 2.97% residue. Assuming the operation of a single incinerator unit and limited waste supply, waste can be converted into electrical energy (Waste to Energy) with a power output of 195.169 watts. It can be concluded that by operating two incinerator units under the current conditions, the energy output could be doubled to 390.338 watts.
Assessing Signalized Intersections During Rush Hours Through Geometric Planning and Road Widening Intersection Salman, Salman -; Pontan, Darmawan; Fadly, Noer; Irawandi, Veby; Kurniyaningrum, Endah; Widiarso, Tulus
Teras Jurnal : Jurnal Teknik Sipil Vol. 15 No. 2 (2025): Teras Jurnal (September)
Publisher : UNIVERSITAS MALIKUSSALEH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29103/tj.v15i2.1251

Abstract

Abstract   As consumers and businesses rely on the efficiency, safety, and reliability of transportation networks, the quality of urban life is at risk due to increasing traffic congestion. The current study aims to evaluate the capacity of an intersection by recalculating the existing condition and making changes with geometric improvements, namely symmetrizing the intersection arms and traffic separation islands and widening the intersection arms. Factors that affect traffic congestion at intersections in the Banda Aceh area, such as driver behavior, traffic light capacity, peak-hour drivers, and intersection design. This study compares on-site data with the performance of signalized intersections using various traffic methodologies. With a population of 261,000 in Banda Aceh, Simpang Surabaya is known as a busy route in urban life. Two techniques are used for the analysis: applying the Indonesian Highway Capacity Manual (MJKI) to the road widening and geometric re-planning. The results show that the intersection capacity is close to saturation, with a saturation value of 1.336 which exceeds 0.85 due to asymmetric traffic islands, high volumes, and long cycle times. Geometric changes and wider intersection roads reduce this value to 0.83. The results indicate that Simpang Surabaya (the intersection of Surabaya) needs to be widened immediately and properly. Further research is recommended to evaluate other intersections in the city of Aceh with quite busy traffic density to carry out calculations and handling by using different of MJKI accordingly.   Keywords: Traffic volume; signalized intersection, capacity; degree of saturation; traffic delay   Abstrak   Ketika konsumen dan perusahaan bergantung pada efisiensi, keamanan, dan keandalan jaringan transportasi, kualitas kehidupan perkotaan berada dalam risiko akibat meningkatnya kemacetan lalu lintas. Penelitian saat ini bertujuan untuk mengevaluasi kapasitas persimpangan dengan menghitung ulang kondisi eksisting dan melakukan perubahan dengan perbaikan geometrik yaitu mensimetriskan lengan-lengan simpang dan pulau pemisah arus lalu lintas dan pelebaran lengan simpang. Faktor -faktor yang mempengaruhi kemacetan lalu lintas di persimpangan jalan di daerah Banda Aceh, seperti perilaku pengemudi, kapasitas lampu lalu lintas, pengemudi pada jam sibuk, dan desain persimpangan. Studi ini membandingkan data di lokasi dengan kinerja persimpangan yang dilengkapi sinyal menggunakan berbagai metodologi lalu lintas. Dengan 261.000 penduduk, Simpang Surabaya di Banda Aceh dikenal sebagai jalur sibuk dalam kehidupan perkotaan. Dua teknik digunakan untuk analisis: menerapkan manual kapasitas jalan raya Indonesia (MJKI) pada pelebaran jalan dan perencanaan geometrik ulang. Hasilnya menunjukkan bahwa kapasitas persimpangan mendekati jenuh, dengan nilai jenuh sebesar 1,336 yang melebihi 0,85 akibat pulau lalu lintas yang asimetris, volume tinggi, dan waktu siklus yang panjang. Perubahan geometris dan jalan persimpangan yang lebih lebar mengurangi nilai ini menjadi 0,83. Hasilnya menunjukkan bahwa Simpang Surabaya perlu segera diperlebar dengan baik. Penelitian selanjutnya dianjurkan mengevaluasi simpang dengan kepadatan yang cukup sibuk di daerah Aceh lainnya untuk dilakukan kalkulasi dan penanganan secepatnya.   Kata kunci: Volume lalulintas, simpang bersinyal, kapasitas, derajat kejenuhan, tundaan lalu   lintas
House of Risk Approach in Determining Delay Risk Factors Kardiani, Rani; Kurniyaningrum, Endah; Yuwono, Bambang Endro; Widiarso, Tulus
IAIC Transactions on Sustainable Digital Innovation (ITSDI) Vol 6 No 2 (2025): April
Publisher : Pandawan Sejahtera Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34306/itsdi.v6i2.690

Abstract

Delays in project completion can lead to significant financial losses, reduced contractor performance, and decreased operational efficiency. This study analyzes the delay factors in the Proton Beam Building construction project at RSPAD Gatot Soebroto, identifying the primary causes and proposing targeted mitigation strategies. A mixed-method approach, combining qualitative interviews and quantitative surveys with key project stakeholders including planning consultants, construction management teams, contractors, and other involved parties is employed. The analysis utilizes the House of Risk (HOR) method to identify and prioritize delay agents and the House of Delay (HOD) method, supplemented by Forum Group Discussions for comprehensive insights. Keyresearch variables encompass human resources, materials, equipment, contract administration, project planning, field conditions, and stakeholder involvement. The study reveals that the primary causes of delays are inadequate planning, design changes, and a shortage of qualified human resources in construction management and planning consulting. The HOR methodology identifies the top three delay agents: Planning not in accordance with regulations (A8), Design changes (A6), and Lack of human resources (A4). To address these issues, the study proposes mitigation strategies, including the creation of a comprehensive checklist for regulatory compliance during planning, ensuring design alignment with applicable regulations, and developing contingency plans to addresspotential human resource shortages. These strategies aim to reduce the most significant delay risks, improve project efficiency, and enhance overall project compliance.
ANALISIS KONSEP KEBERLANJUTAN PADA BANGUNAN CAGAR BUDAYA ANALYSIS OF SUSTAINABILITY CONCEPTS IN HERITAGE BUILDINGS Khansseler, Gery; Widiarso, Tulus; Wijayanto , Punto
Metrik Serial Teknologi dan Sains Vol. 6 No. 2 (2025): agustus
Publisher : Konsorsium Cendekiawan Indonesia

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Abstract

Keberlanjutan merupakan aspek penting dalam pembangunan, termasuk dalam pelestarian bangunan cagar budaya. Sebagai konsep jangka panjang, keberlanjutan tidak hanya berfokus pada efisiensi energi dan adaptasi terhadap perubahan iklim, tetapi juga pada pelestarian nilai historis dan estetika bangunan. Dalam konteks urbanisasi dan perubahan iklim yang semakin pesat, konservasi bangunan bersejarah menjadi tantangan kompleks yang memerlukan pendekatan holistik. Konsep keberlanjutan diterapkan untuk memperpanjang umur bangunan melalui pengelolaan sumber daya yang ramah lingkungan serta adaptasi struktural terhadap kebutuhan masa kini tanpa menghilangkan nilai budaya yang terkandung. Penelitian ini menggunakan metode kualitatif dengan studi kasus pada beberapa bangunan cagar budaya di Indonesia yang telah menerapkan prinsip keberlanjutan. Data diperoleh melalui observasi lapangan, wawancara dengan ahli konservasi, dan studi literatur. Analisis difokuskan pada identifikasi elemen keberlanjutan yang dapat diintegrasikan dalam struktur dan material bangunan lama. Hasil studi menunjukkan bahwa penerapan prinsip keberlanjutan dapat meningkatkan efisiensi konservasi, memperpanjang usia bangunan, serta memperbaiki kualitas lingkungan sekitar. Studi ini memberikan kontribusi terhadap pengembangan kebijakan dan praktik konservasi bangunan bersejarah yang berkelanjutan, serta menjadi panduan bagi arsitek dan pengambil keputusan di Indonesia.
Software Based Geotechnical Analysis of Spillway Slope Reinforcement Fabyanto, Ikhsan; Zaki, Muhammad; Pontan, Darmawan; Widiarso, Tulus
Technomedia Journal Vol 10 No 2 (2025): October
Publisher : Pandawan Incorporation, Alphabet Incubator Universitas Raharja

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33050/zzgyr313

Abstract

The construction of large-scale infrastructure such as dams requires precise planning and implementation to ensure structural stability and long-term operational safety. This study aims to analyze slope protection and embankment reinforcement at the spillway excavation area of the Dam Project in Surian District, located in the 137 km-long Cipunagara River Basin. A quantitative approach was applied, using geotechnical modeling software Plaxis 8.6 and Microsoft Excel for data processing. Three slope reinforcement methods were compared: geomat, shotcrete, and cocomesh. Based on the analysis, slope reinforcement using shotcrete achieved the highest safety factor, with short-term SF = 1.649 (34.50% increase) and long-term SF = 1.514 (23.49% increase). Geomat ranked second with SF = 1.544 (25.94%) and 1.418 (15.66%), while cocomesh obtained SF = 1.540 (25.61%) and 1.355 (10.52%). The unreinforced slope had an SF of 1.226. In terms of cost, shotcrete was the most expensive at IDR 4,331,068,967.23, followed by geomat (IDR 2,734,025,024.50) and cocomesh (IDR 906,745,000.00). However, shotcrete also required the longest construction time (30 days) compared to geomat (20 days) and cocomesh (16 days). Shotcrete provides the best technical performance for slope stability, but geomat and cocomesh are more efficient alternatives in terms of cost and time, offering a balanced solution for slope reinforcement projects.
Analisis Perbandingan Risiko Pelaksanaan Konstruksi Kontrak Pekerjaan Lumsum dan Harga Satuan Riyanto, Sugeng; Anwar, Saihul; Pontan, Darmawan; Widiarso, Tulus
Jurnal sosial dan sains Vol. 4 No. 7 (2024): Jurnal Sosial dan Sains
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/jurnalsosains.v4i7.1478

Abstract

Latar Belakang: Dalam pelaksanaan konstruksi di Indonesia, kontrak antara pemilik proyek dan kontraktor sering menggunakan kontrak lumsum dan kontrak harga satuan. Kontraktor harus menjaga peluang keuntungan sambil mengelola risiko biaya, waktu, dan mutu. Untuk mencapai konstruksi yang efektif, penting untuk menganalisis risiko pada kedua jenis kontrak ini dengan mempertimbangkan persepsi, preferensi, pengalaman, dan intuisi kontraktor. Tujuan: Menganalisis risiko-risiko menggunakan Metode Analytic Hierarchy Process (AHP) dengan Microsoft Excel, yang memberikan hasil penilaian subjektif dan objektif. Metode: Analisis dilakukan dengan menentukan variabel/kriteria risiko, mengembangkan struktur hierarki yang terdiri dari tiga level (kriteria, sub-kriteria, dan alternatif), dan menyusun kuesioner. Kuesioner disebarkan kepada 12 responden dari PT. Nindya Karya - Divisi EPC. Data kemudian ditabulasikan, dibuat matriks berpasangan, dilakukan perbandingan berpasangan, dihitung nilai rata-rata, diukur bobot prioritas, dan diperiksa Consistency Ratio (CR). Hasil: Pada kriteria level 1, aspek biaya memiliki risiko tertinggi (39,68%), diikuti mutu (38,96%) dan waktu (21,35%). Pada sub kriteria level 2, risiko tertinggi pada aspek biaya adalah pekerjaan tambah kurang akibat perubahan desain (13,33%), pada aspek waktu adalah penerapan metode pelaksanaan yang tidak tepat (29,96%), dan pada aspek mutu adalah ketidaksesuaian desain (23,60%). Pada alternatif level 3, risiko tertinggi adalah tenaga kerja yang kurang profesional dan hasil pekerjaan yang tidak rapi (84,65%). Kesimpulan: Analisis AHP menunjukkan bahwa kontrak lumsum memiliki risiko lebih tinggi (75,12%) dibandingkan kontrak harga satuan (24,88%).
Co-Authors Agus Budi Purnomo Antoni, Febri Ardilla Jefri Karista Bambang Endro Yuwono Canthika Nada Endah Kurniyaningrum Fabyanto, Ikhsan Fadly, Noer Fajar Isnaini, Rohimah Fajar, Isma Inavonna, Inavonna Irawandi, Veby Ischak, Mohammad Kardiani, Rani Khansseler, Gery Lili Kusumawati Maryati, Indah Muhammad Zaki Nityasa Kirana, Kinantya Nur Syah, Azzahra Pontan, Darmawan Pribadi, I Gede Oka Sindhu Purnomo, Endhi Ibuhindar Rahma Ningsih , Nisrina Reza Fauzi Rintawati, Dewi Rose, Ugahari Saihul Anwar Saihul Anwar Salman, Salman - Salsabilla Sari, Christina Sindhu Pribadi , I.G Oka Sugeng Riyanto Sugeng Riyanto Suhartini Suhartini Susetyarto, Martinus Bambang Syamsiar, Syamsiar Tundono, Sri Wibawa, Ilham Akbar Mulya Wijayanto , Punto Wildan, Dwiki Zayadi, Ruwaida