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I Putu Elisa Sarassantika
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Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University, Denpasar-Bali, Indonesia, 80235
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INDONESIA
Journal of Infrastructure Planning and Engineering
Published by Universitas Warmadewa
ISSN : -     EISSN : 28295153     DOI : https://doi.org/10.22225/jipe
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering
Journal of Infrastructure Planning and Engineering (JIPE) is a peer-reviewed and open-access journal that was launched by the Master Program of Infrastructure and Environmental Engineering, Postgraduate Program, Warmadewa University, Denpasar, Bali in 2022. This journal publishes regularly twice a year in April and October however, it is possible to publish a supplement issue. Supplements are not mandatory publishing and are only issued if deemed necessary. JIPE welcomes submissions across a range of disciplines and publishes both theoretical and practical studies.
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 8 Documents
 1 
Search results for , issue "Vol. 5 No. 1 (2026)" : 8 Documents clear
Comparative analysis of cost and time for beam, slab, and column formwork using conventional and aluminum formwork methods Matildah Pretty Putri Alkassa; Sudarno P Tampubolon; Agnes Sri Mulyani
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.5.1.2026.33-42

Abstract

The development of the construction industry in Indonesia has accelerated urbanization and population growth, demanding the implementation of efficient construction methods, particularly in the development of high-rise buildings that optimize both cost and project duration. In reinforced concrete construction, formwork plays a significant role in determining the overall cost and time of the construction project. Therefore, this study analysis the comparison of cost and time for formwork work on columns, beams, and slabs in the BSI Tower project. Conventional formwork, typically made of wood, is still widely used due to its relatively low initial cost and flexibility. However, this method has several drawbacks, including material waste, low durability, high labour intensity, long processing time, inconsistent concrete surface quality, and a short service life, which lead to higher maintenance and replacement costs. In contrast, aluminum formwork is lightweight, precise, and reusable. This research employs a quantitative approach and utilizes Microsoft Project software. Cost analysis is conducted by multiplying the work volume by unit prices obtained from the 2024 Jakarta Standard Unit Price Analysis (AHSP) and project documentation, while time analysis is developed through Microsoft Project to estimate the duration of formwork installation and removal from floors 14 to 22. The results indicate that aluminum formwork is more efficient than conventional formwork in terms of both cost and time. The total cost of the aluminum formwork system was IDR 6,262,395,602, while the total cost of the conventional formwork system was IDR 6,509,110,236. This indicates that the aluminum formwork system is more economical, with a cost reduction of IDR 246,714,634, equivalent to approximately 3.79% compared to the conventional formwork system. Regarding time, aluminum formwork requires 63 days to complete, whereas conventional formwork takes 108 days, resulting in a time saving of 45 days. This research provides a data-driven framework to assist contractors in optimizing project scheduling and cost budgeting when transitioning from conventional formwork to aluminum formwork systems.
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.
Influence of styrofoam-based additives on the mechanical properties of mortar for concrete roof tile production Sudirman Indra; Adinda Yunita Putri; Mohammad Erfan; Vega Aditama; Redi Sigit Febrianto; Ratri Andinisari
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.5.1.2026.8-14

Abstract

Concrete roof tile are widely used as roofing material due to its durability and performance. However, concrete roof tiles have relatively high weight and their production cost limit broader application. This study aims to develop an environmentally friendly lightweight concrete roof tile by adding styrofoam waste as a partial substitute for fine aggregates in the mortar mix. Four percentage variations of styrofoam content were used in making mortar and roof tile samples, which are 0%, 4%, 8%, and 12% relative to the total volume of sample. These variations were chosen to investigate the effect of styrofoam addition on the mechanical and physical properties of mortar and concrete roof tiles. A series of tests were also conducted, such as compressive, tensile, and flexural strength tests of mortar, flexural strength of roof tiles, as well as impermeability and porosity tests of the final products. The results of these tests indicate that the optimal mechanical performance was achieved at 8% styrofoam content, with mortar flexural strength reaching 5.05 MPa and roof tile flexural strength at 4.58 MPa. Although compressive strength declined with increasing styrofoam content, values remained within acceptable limits for non-structural applications. All roof tile samples met the impermeability criteria based on SNI 0096:2007, which states that there must not be water seepage through the samples for approximately 20 hours ± 5 minutes, regardless of their styrofoam content. Finally, it can be concluded that styrofoam can be effectively repurposed as an additive in concrete roof tile production, resulting in a lightweight, cost-effective, and sustainable building material.
Spatial mapping approach and irrigation water quality assessment for dryland management strategy in Abang district, Karangasem regency, Bali province Luthfi Inayah; I Putu Gustave Suryantara Pariartha; Silvia Gabrina Tonyes
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.5.1.2026.15-22

Abstract

This study analyzes irrigation water quality and evaluates dryland suitability in Abang District, Karangasem Regency, Bali Province, using two assessment models: the National Sanitation Foundation Water Quality Index (NSF-WQI) and the Index of Surface Water Vulnerability to Pollution (IKAPP). Water samples from six irrigation points along Tukad Nyuling were analyzed for physical and chemical parameters, while rainfall, land use, and population density were integrated through spatial analysis. The results show that NSF-WQI values ranged between 69.96–79.78, indicating moderate to good irrigation quality, while the IKAPP average value of 23.69 represented a low vulnerability level. Spatial variation was influenced by topography, soil permeability, and land cover distribution. The integration of NSF-WQI and IKAPP provides a reliable framework for site-specific irrigation management, supporting sustainable dryland agriculture in tropical environments.
Modeling commuter mode shift to electric railway services: an integrated performance analysis and stated preference approach for the Rangkasbitung – Merak line Gineung Pratidina; Muhammad Oka Mahendra
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.5.1.2026.23-32

Abstract

This study investigates the relationship between railway travel service characteristics and passenger demand on the Rangkasbitung – Merak commuter rail corridor. Secondary data on passenger volumes were obtained from PT Kereta Commuter Indonesia, while primary data were collected via on-board surveys conducted across multiple afternoon trips. Descriptive statistical analyses were performed to determine key performance indicators—namely load factor, travel time, dwell time, and commercial speed against established service standards. Subsequently, a binary logistic regression model was employed to assess the influence of travel cost and travel time on passengers’ likelihood to choose electric commuter services over conventional local trains. Results reveal an average load factor of 2.40, indicating the existing service capacity is frequently exceeded during peak periods. Average dwell times ranged between 2–5 minutes per station, and observed commercial speeds fell below the stipulated benchmark. Logistic regression analysis showed that travel cost (p = 0.316) did not exert a statistically significant effect on mode choice, whereas travel time emerged as a significant determinant: improvements in travel time increased the probability of passengers opting for electric commuter services by approximately 72.1%. These findings suggest that enhancing operational speed and optimizing station dwell times are critical to meeting passenger demand and improving overall service attractiveness on the Rangkasbitung – Merak route.
Finite element analysis of bore pile foundation performance in silty soils of Gorontalo Indonesia Indriati Martha Patuti; Mohamad Anugrah Ahmad; Fadly Achmad
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.5.1.2026.58-66

Abstract

The development of multi-story buildings on soft soils poses significant challenges in geotechnical design, particularly in tropical regions such as Gorontalo, Indonesia. The development of multi-story buildings on soft soils poses significant challenges in geotechnical design, particularly in tropical regions such as Gorontalo, Indonesia. This study investigates the behavior of bored pile foundations with varying diameters (0.60 m, 0.80 m, and 1.00 m) using the finite element method (FEM) via PLAXIS 2D. The simulation integrates in-situ soil investigation data, including SPT and laboratory tests, with a staged construction model to evaluate total deformation and stress distribution. The borehole profile revealed predominantly silty and silty sand layers with high compressibility and low bearing capacity, requiring precise analysis to mitigate settlement risks. Two loading stages were analyzed: (1) pile installation and (2) column load application with a maximum load of 3,363.3 kN per column. Results show that increasing pile diameter significantly reduces vertical displacement. During pile installation, the total deformation was 4.37 mm for the 0.6 m pile, 4.68 mm for the 0.8 m pile, and 4.19 mm for the 1.0 m pile. Under full column load, displacement reached 35.3 mm (0.6 m), 29.6 mm (0.8 m), and 29.4 mm (1.0 m), respectively. Total stress analyses revealed more concentrated stress beneath the smaller piles and more diffused stress in larger piles. The 1.0 m pile showed the best performance, but the 0.8 m pile offered a comparable result with better material efficiency. This study supports the use of FEM for foundation optimization and provides technical guidance for sustainable infrastructure in soft soil regions.
Application of the continuous green-t (CGT) intersection concept at signalized intersection to support sustainable mobility in peatland area Rizqy Ridho Prakasa; Dika Meilisan; Edi Yusuf Adiman; Niskan Walid Masruri; Novreta Ersyi Darfia; Randhi Saily; Intan Monica MG; Vinka Lyona; Benny Hamdi Rhoma Putra; Safridatul Audah; Soewignjo Agus Nugroho
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.5.1.2026.43-50

Abstract

The signalized intersection of Jl. HR. Soebrantas – Jl. SM. Amin is one of the congestion-prone intersections in Pekanbaru City, particularly due to its location in a peatland area. Peatland conditions, which are characterized by low bearing capacity and high compressibility, limit extensive physical expansion of road infrastructure. At the same time, this intersection serves as a key connector between major activity centers, including educational institutions, offices, commercial areas, and residential zones, resulting in significant traffic congestion and long queues, especially during peak hours. To address these challenges, this study proposes the implementation of a Continuous Green-T (CGT) intersection design as an operational and geometric solution that minimizes the need for large-scale infrastructure modification. The objective of this study is to evaluate the performance of the intersection after the implementation of the CGT design using microscopic traffic simulation with VISSIM. The analysis results indicate that the existing condition has an average delay of 62.5 seconds (Level of Service/LOS F), while the implementation of CGT reduces the average delay to 19.3 seconds (LOS C). This demonstrates that the CGT design is effective in reducing intersection delay by 43.2 seconds and improving the Level of Service from F to C, making it a suitable approach for traffic management in physically constrained environments such as peatland areas.
Evaluation of rigid pavement damage using PCI and bina marga approaches (case study: Saketi–Malingping road, KM 17–27) Irwan; Muhammad Oka Mahendra
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.5.1.2026.51-57

Abstract

This study aims to evaluate the damage condition of the Saketi - Malingping road section (KM 17-KM 27) using two assessment approaches: the Pavement Condition Index (PCI) and the Bina Marga method. This road section is a strategic arterial road in Pandeglang Regency, Banten, which experiences high operational pressure and shows signs of surface distress. Data were collected through field surveys across 42 segments. The PCI analysis results show an average value of 99.99, indicating the road is in a "Very Good" category structurally. Assessment using the Bina Marga method revealed that block cracking is the most dominant type of damage, accounting for approximately 89.31% of the total damaged area. Although the overall road condition value is still considered good, the presence of extensive block cracking indicates early signs of structural vulnerability. The study recommends preventive measures such as crack sealing, localized overlay, or reconstruction of severely cracked sections.

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