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All Journal Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa JOURNAL OF CIVIL ENGINEERING, BUILDING AND TRANSPORTATION BENTANG : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Abdimas Dewantara Praxis : Jurnal Sains, Teknologi, Masyarakat dan Jejaring Jurnal Rekayasa Konstruksi Mekanika Sipil Jurnal Pensil : Pendidikan Teknik Sipil GERVASI: Jurnal Pengabdian kepada Masyarakat Jurnal Muara Sains, Teknologi, Kedokteran dan Ilmu Kesehatan Jurnal Abdi Insani Jurnal ComunitA Servizio Jurnal Rekayasa Teknik Sipil dan Lingkungan Asian Journal of Community Services (AJCS) Journal of Infrastructure Planning and Engineering Jurnal Abdimas Maduma
Sudarno P Tampubolon
Teknik Sipil, Universitas Kristen Indonesia (UKI), Jakarta
Agriculture, Biological Sciences & Forestry Arts Humanities Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Mathematics Nursing Public Health Social Sciences Transportation Other

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Comparative analysis of the behavior of drop panel-slab system and beam-slab system using spectrum response method Satria Dayvano Mangelep; Sudarno P Tampubolon; Setyadi
Journal of Infrastructure Planning and Engineering Vol. 5 No. 1 (2026)
Publisher : Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22225/jipe.5.1.2026.1-7

Abstract

The height of a building is influenced by the needs of the room. The height of a building can be reduced by planning the structural system to be used. The use of a structural system in a building will affect the behavior of the structure when given an earthquake load. The drop-panel slab is a structural system where the slab is directly connected to the column without resting on the beam. In this system, the load received by the floor slab is directly distributed to the column. The advantage of the drop-panel slab system is easier installation of formwork and reinforcement. In addition, the drop-panel slab system will reduce the clear height of the room because there are no beams protruding under the slab. However, the drop-panel slab system has disadvantages such as limited slab span and weak in resisting shear forces. While the slab-beam system is a structural system where the slab will rest on the beam to distribute the load. The slab-beam system has advantages such as a longer span and better strength to withstand shear because there are beams as components that resist shear forces. A comparison of the behavior of the beam-slab and drop panel -slab system will be analyzed using the spectrum response method ETABS V.22 software to determine the value of the structure vibration period, base shear, the story drift, and the deflection value that occurs on the floor slab. The slab-beam structural system demonstrates a higher fundamental period in the x-direction and a lower period in the y-direction when compared with the slab-drop panel system. The value of the base shear force on the beams is also smaller than in the panel drop-drop system due to the smaller effective weight of the building as well. Likewise, the story drift that occurred in the smaller slab-beam system was 17,39% in the x-direction and 20,50% in the y-direction compared to the slab-drop panel system. This shows that the slab-beam system can be more reliable in reducing the story drift value due to earthquake loads. The value of the deflection of the floor slab calculated on the floor that experienced the greatest moment showed that the system of slabs experienced an instantaneous deflection of 10.58 mm, 26.84% bigger than the drop panel-slab system that experienced an instantaneous deflection of 7,74 mm. So that the service ability of the slab-drop panel system is better than the slab-beam system.
PERFORMANCE ANALYSIS COMPRESSIVE STRENGTH AND WATER ABSORPTION OF RICE HUSK WASTE AS A MIXED MATERIAL IN PAVING BLOCK PRODUCTION FOR THE RICE MILLING INDUSTRY Sudarno P Tampubolon; Deviana Pratiwi Munthe
Jurnal Pensil : Pendidikan Teknik Sipil Vol. 15 No. 2 (2026): Jurnal Pensil : Pendidikan Teknik Sipil
Publisher : LPPM Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jpensil.v15i2.66744

Abstract

The utilization of rice husk waste in Indonesia remains very limited, despite rice production being carried out three times a year, which significantly increases the volume of grain and straw. Rice husk waste can be processed through various methods, including its use as a mixture in compost and paving block production, with the aim of reducing environmental impacts. In the rice milling process, approximately 20–30% of the initial grain weight is obtained as husks, 8–12% as bran, and 50–65% as milled rice. The high proportion of husks generated can potentially cause environmental problems if not properly managed. Therefore, this research utilize rice husk waste by burning it at temperatures of 600°C, where the combustion process produces Rice Husk Ash (RHA) with pozzolanic properties. RHA contains a high silica content, making it a suitable supplementary material for paving block production. Based on the experimental results, paving blocks with a 10% addition of RHA achieved an average compressive strength of 15.4 MPa, which meets the criteria for C quality paving block. The water absorption values ranged from 9% to 21%, with an average of 14%. Based on the results of this research indicated that incorporating rice husk ash as an additive in paving block manufacturing can enhance material quality, producing compressive strength that exceed the standard requirements for C quality concrete.
Analisa Perilaku Pushover pada Pengujian Balok Beton Bertulang Sudarno P Tampubolon
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 10 No 1 (2022): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v10i1.3078

Abstract

Beams are part of the building structure that is important to consider when designing the structure. Some failures that occur in beams due to beam reinforcement are not installed such as planning/ design procedures, this problem can cause structural failure. Knowing the behavior of the beam structure due to the given load can help predict the strength of the structural beam and the comfort of the planned structure. To determine and predict the strength and comfort of the reinforced concrete beam structure due to the received load, experimental and simulation tests are carried out. VecTor2 simulation is used to predict shear, crack, and displacement forces in reinforced concrete beams when displacement loads are applied. The bond stress-slip effect (0.139) has a good effect on the strength and hysterical response of reinforced concrete beams. From the results of pushover testing and simulations, it is obtained that the ratio for load capacity ranges from 1.00-1.095. In addition, the installation of 135˚ hooks on stirrups shows that the crack behavior that occurs forms an angle of 45˚, this indicates that the bond between concrete and reinforcement is going well, this can be seen from the analogous behavior principle of reinforced concrete beams.
Analisis Kerusakan Struktur Bangunan dan Manajemen Bencana Akibat Gempa Bumi, Tsunami, dan Likuifaksi di Palu: Analysis of Building Structure Damage and Disaster Management Due to Earthquake, Tsunami, and Liquefaction in Palu Sudarno P Tampubolon; I Putu Ellsa Sarassantika; I Wayan Gede Suarjana
Bentang : Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil Vol 10 No 2 (2022): BENTANG Jurnal Teoritis dan Terapan Bidang Rekayasa Sipil (Juli 2022)
Publisher : Universitas Islam 45

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33558/bentang.v10i2.3263

Abstract

The strong column-weak beam is a design concept that needs to be implemented and considered in the planning of building structures (high-rise and low-rise buildings). Generally, structural failure occurs at beam-column joints. Such failure occurred due to the lack of attention to good and correct design concepts. The detailing of reinforcement for columns, beams, and beam-column connections has not yet fully implemented the SNI-2847-2019 standard which results in the reinforcement cannot withstand the combination of tensile, compressive, and shear forces that occur during an earthquake. In addition, the incomplete design of strong column-weak beam in building planning causes the building to fail in the column structure when receiving axial forces. The purpose of this study was to analyze the structural damage and the disaster management system applied during the earthquake in Palu. The research is carried out by investigation/survey methods on the study area as well as checking and recording the data about damage condition of buildings and conducting a hammer test (non-destructive test) to get the strength value of the concrete. Testing result showed the compressive strength value of the f’c concrete used is 20 to 48 MPa. In addition, the details of stirrups reinforcement are also not fully understood about their function on beams and columns, which results in the installation of stirrup reinforcement does not meet the criteria for bending angles of 90˚, 135˚, 180˚ and the addition of tensile and compressive reinforcement lengths. The high potential for earthquake hazard causes Palu and its surroundings tend to have an earthquake risk. For this reason, it is necessary to implement disaster mitigation for Palu region, which aims to reduce the number of casualties when natural disasters occur, both human and property loses.
ANALISIS LENDUTAN DAN KUAT TEKAN PADA PENGUJIAN BALOK BETON BERTULANG DENGAN VARIASI JARAK SENGKANG MIRING SUDUT TEKUK 135° Sudarno P Tampubolon; Irene Vista Simanjuntak; Priska Marlen Duakaju; SOPHIAN TALENTA MENDROFA
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 5 No. 2 (2024): Jurnal Rekayasa Teknik Sipil dan Lingkungan, Oktober 2024, ISSN 2722-0230 (Onli
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v5i2.6406

Abstract

ABSTRACT The Failure of reinforced concrte beam structures can occur due to the function of tensile reinforcement, compression reinforcement, and stirrups not functioning properly so that the beam is unable to withstand/ support the working load. This study aims to analyze the strength of reinforced concrete beams using inclined stirrups at an angle of 135° with a variation of 100 mm and 150 mm. Reinforced concrete is chosen as a combination of concrete and steel to increase the tensile strength that concrete does not have. The Ultimate Stress Design (USD) method is used to design reinforced concrete element structures. The test involved two samples of reinforced concrete beams measuring 15x15x80 cm. Based on the test, the average compressive strength of 100 mm concrete beams was 28 MPa and 150 mm was 29 MPa. The tensile test of D-13 threaded steel reinforcement produced an fy of 354 MPa and D-8 plain fy value of 369 MPa. The flexural strength of concrete beams at stirrup distances of 100 mm and 150 mm was recorded at 23.67 Mpa with a maximum deflection occurring in beam B-1 of 46.4 mm and a maximum deflection in beam B-2 of 47 mm. The results of this study provide important information about the effect of variations in inclined stirrups on the structural performance of reinforced concrete in increasing the flexural and shear strengths that occur in beams. Keywords: Reinforced Concrete, Diagonal Stirrup Reinforcement, Compressive Strength, Ultimate Stress Design (USD), Ultimate Moment Capacity, Tensile Test, Bending Strength.
The OPTIMALISASI KONDUKTIVITAS TERMAL BETON BERPORI MELALUI INOVASI MATERIAL BERBASIS ABU SEKAM PADI DAN SERAT KELAPA SEBAGAI BAHAN TAMBAH RAMAH LINGKUNGAN: Indonesia Irene Vista Simanjuntak; Sudarno P Tampubolon; Pinondang Simanjuntak
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 1 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, April 2025, ISSN 2722-0230 (Online
Publisher : UKI Press

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

Abstract

The purpose of this study is to increase the thermal conductivity of pervious concrete by adding environmentally friendly supplemental materials, such as coconut fibre and rice husk ash (RHA). The material variations include RHA at 0%, 5%, 10%, and 15% by cement weight and coconut fiber at 0%, 0.5%, and 1% by total mix weight. Five selected combinations were analyzed based on the balance between workability, strength, and thermal performance. Tests conducted include slump (workability), compressive strength (at 28 days), thermal conductivity, water absorption, and freeze-thaw resistance. The results indicate that the addition of RHA and coconut fiber reduces workability but significantly enhances compressive strength and freeze-thaw durability. Thermal conductivity decreased by up to 23% in the mix with 15% RHA and 1% fiber, indicating improved thermal insulation capacity. While water absorption increased with higher fiber content, it was reduced by the presence of RHA. The optimal combination was found in the mix with 10% RHA and 1% coconut fiber, which offered the best balance between mechanical strength, thermal efficiency, and environmental durability. Keywords: Coconut fiber; eco-friendly concrete; pervious concrete; rice husk ash; thermal conductivity  
PEMANFAATAN LIMBAH PLASTIK UNTUK PENGEMBANGAN USAHA BANK SAMPAH NUSA INDAH PADA PEMBUATAN PAVING BLOCK Sudarno P Tampubolon; Medyawanti Pane; Sesmaro Max Yuda; Togu Tri Saputra Lumban Gaol; Gresia Enjelina Siahaan; Luice Raymon Nainggolan; Melky Hendrik Kelo
GERVASI: Jurnal Pengabdian kepada Masyarakat Vol. 10 No. 1 (2026): GERVASI: Jurnal Pengabdian Kepada Masyarakat
Publisher : LPPM IKIP PGRI Pontianak

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31571/gervasi.v10i1.10041

Abstract

Akumulasi sampah plastik menyebabkan pencemaran tanah dan perairan, memicu polusi udara, serta berkontribusi terhadap peningkatan emisi gas rumah kaca yang memperburuk pemanasan global dan perubahan iklim. Volume sampah plastik yang terus meningkat tidak diimbangi dengan sistem pengelolaan yang efektif, sehingga kapasitas Tempat Pembuangan Akhir (TPA) semakin terbatas dan pencemaran lingkungan meluas hingga ke lautan. Daur ulang plastik yang masih rendah, hanya berkisar 5–10%, menunjukkan perlunya inovasi pengolahan limbah. Sosialisasi dan pelatihan pembuatan paving block dengan campuran plastik PET menjadi alternatif inovatif untuk meningkatkan nilai guna sampah plastik sekaligus mengurangi dampak negatif terhadap lingkungan. Kegiatan ini menghasilkan paving block mutu C dengan f’c 12,5–15 MPa dengan campuran plastik yang memiliki daya serap air yang lebih rendah dibandingkan dengan paving normal, karena sifat plastik yang hidrofobik. Paving block dengan campuran plastik memberikan pengaruh minimal pada perendaman, sedangkan paving mormal peningkatan serapan lebih signifikan akibat struktur pori yang lebih terbuka.
METODE PEMILIHAN FACADE KACA SINGLE GLAZED PADA BANGUNAN Fuk Jin Oei; Sudarno P Tampubolon; Daniel
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.6814

Abstract

The building façade must be carefully designed from the early planning stage. Given the wide variety of single-glazed glass types, selecting an appropriate glass façade is not a simple task. In practice, glass selection is generally based solely on cost considerations. This study proposes a glass façade selection method that incorporates comfort performance as a primary criterion. In addition to comfort, physical properties and cost factors are also considered. The comfort parameters evaluated in this study include thermal comfort and visual comfort derived from the glass properties. A total of fifty-five (55) single-glazed glass samples, consisting of float glass, tinted glass, and reflective glass, were analyzed. The results indicate that the proposed method can effectively support glass façade selection. For float glass, increasing glass thickness leads to improved comfort performance. For tinted glass, green-colored glass with a thickness of 6 mm exhibits the best comfort performance with a value of 6.6. Meanwhile, for reflective glass, classic green reflective glass achieves the highest comfort performance value of 7.0 at a thickness of 6 mm. Among all single-glazed glasses (tinted and reflective) with a thickness of 6 mm, classic green reflective glass demonstrates the best overall comfort performance.
PENGEMBANGAN MATERIAL KONSTRUKSI RAMAH LINGKUNGAN MELALUI SUBSTITUSI PARSIAL SEMEN DAN PASIR DENGAN ABU SEKAM PADI DAN FLY ASH : PENGEMBANGAN MATERIAL KONSTRUKSI RAMAH LINGKUNGAN MELALUI SUBSTITUSI PARSIAL SEMEN DAN PASIR DENGAN ABU SEKAM PADI DAN FLY ASH Irene Vista Simanjuntak; Sudarno P Tampubolon
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.7538

Abstract

This study aims to develop an environmentally friendly construction material by partially substituting cement and sand with rice husk ash (RHA) and fly ash in pervious concrete. The combination of these two pozzolanic materials is expected to enhance the porosity of the concrete without causing a significant reduction in compressive strength, thereby maintaining its functionality while supporting rainwater conservation in urban areas. The experimental program consisted of a control concrete (without additives) and three modified mixes containing 10%, 15%, and 20% of combined pozzolanic materials (RHA and fly ash) as a partial replacement of the total binder, with a water–cement ratio (w/c) of 0.5 and up to 80% reduction in sand content. The results indicate that increasing the pozzolanic content proportionally increases the porosity and water absorption, from 5.9% in the control mix to 9.8% in the highest variation. Despite the higher porosity, the compressive strength remained within the range of 22–27 MPa, which satisfies the requirements for non-structural concrete. This demonstrates that RHA and fly ash can effectively replace a substantial portion of cement without significantly compromising performance. The pozzolanic reaction between active silica and Ca(OH)₂ generated secondary C–S–H gel formation, which strengthened the microstructure surrounding the pores. Overall, the incorporation of RHA and fly ash in pervious concrete produces a material with a balanced combination of strength, porosity, and environmental sustainability, offering great potential for application in sustainable drainage systems, permeable pavements, and urban green infrastructure. Keywords: Green Concrete; Rice Husk Ash; Fly Ash; Porosity; Compressive Strength; Pozzolanic Reaction; Sustainable Infrastructure.  
STUDI LITERATUR: PERBANDINGAN KINERJA CAMPURAN ASPAL RECLAIMED ASPHALT PAVEMENT DENGAN PENAMBAHAN OLI, MINYAK, DAN PLASTIK Felix Zebua; Ismael Tafonao; Sudarno P Tampubolon; Efendy Tambunan
Jurnal Rekayasa Teknik Sipil dan Lingkungan - CENTECH Vol. 6 No. 2 (2025): Vol. 6 No. 2 (2025): Jurnal Rekayasa Teknik Sipil dan Lingkungan, OKTOBER 2025,
Publisher : UKI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33541/cen.v6i2.8045

Abstract

This study is a literature review that compares the performance of recycled asphalt mixture or Reclaimed Asphalt Pavement (RAP) modified with three types of waste materials, namely waste oil, used cooking oil (WCO), and styrofoam plastic waste. An analysis was conducted on 13 scientific journals that discussed the influence of the three materials on technical parameters such as Marshall stability, flow, Marshall Quotient (MQ), and mixed durability. The results of the study show that used cooking oil (WCO) is the most optimal and environmentally friendly feedstock, as it is able to significantly increase the flexibility and durability of the RAP mixture at the ideal level of 3–6%. Used oil is also effective in restoring the aging properties of asphalt, but its use in excess amounts (>10%) can reduce its stability and resistance to water, and requires special handling because it is classified as B3 waste. Meanwhile, plastic waste such as styrofoam, PET, and LDPE are more suitable as additives to improve the structure and reduce the porosity of the mixture, although it does not function as the main contaminant. Of all the types of cooking materials used, used cooking oil (WCO) shows the most consistent performance according to Bina Marga 2010 specifications. Keywords: RAP, used oil, used cooking oil (WCO), styrofoam plastic waste
Co-Authors Agnes Sri Mulyani Candra Christianti Purnomo Charly David Hutagalung Chatarina Finella Cintantya Budi Casita Dady Supriadi Dang Thanh Trung Daniel David , Charly Deviana Pratiwi Munthe Dianty, Grace Putri Dikky Antonius Doroti, Doroti Efendy Tambunan Elferida Sormin Felix Zebua Formas Juitan Lase Fuk Jin Oei Fuk Jin Oei Grace Putri Dianty Gracela P. Tarapandjang Gresia Enjelina Siahaan Haposan Sahala Raja Sinaga Hutabarat, Lolom I Gede Dhana Putra Sanjaya I Nengah Sinarta I Putu Ellsa Sarassantika I Putu Ellsa Sarassantika I Wayan Gede Suarjana I Wayan Gede Suarjana I Wayan Maesa Andreasnata Ida Bagus Gede Parama Putra Indry, Jessica Miracella Irene Vista Simanjuntak Irene Vista Simanjuntak Ismael Tafonao Iwan B. Santoso John fernando silalahi Kristofel, Andreas Samuel Lolom Evalita Hutabarat Louisa , Agnes Luice Raymon Nainggolan Martinus Nifotuho Fau Matildah Pretty Putri Alkassa Medyawanti Pane Melky Hendrik Kelo Michel Tambunan Monica T Andries Mulyani, Agnes Sri Naibaho, Lamhot Nataldo , Benny Tri Nelius Harefa Ni Komang Armaeni Pane, Medyawanti Paskalis Halawa Pinondang Simanjuntak Pinondang Simanjuntak Prestasi Aswinda Zebua Priska Marlen Duakaju Purnomo, Candra Christianti Risma M Simanjuntak Roro Sulaksitaningrum Sally Septania Napitupulu Sally Septania Napitupulu Sari , Desma Satria Dayvano Mangelep Sesmaro Max Yuda Setiyadi Setiyadi Setiyadi, Setiyadi Setyadi Setyadi Setyadi Setyadi Simanjuntak P Simanjuntak, Risma M Sophian Talenta Mendrofa Srimulyani, Agnes Steffy Catharina Rebeccha Simbolon Sudarwani , Margareta Maria Togu Tri Saputra Lumban Gaol Ulinata Ulinata Ulinata Yohan K. Kafolapada Yonathan, Yonathan Yuki Panie Zefanya Tomaluweng