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Fondasi: Jurnal Teknik Sipil
Published by Universitas Sultan Ageng Tirtayasa
ISSN : 23024976     EISSN : 25031511     DOI : http://dx.doi.org/10.36055/jft.v9i1.7440
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture Transportation
Terbitan berkala yang mempublikasikan hasil penelitian yang berkaitan dengan pengembangan sains dan teknologi dalam bidang teknik sipil (Struktur, Transportasi, Geoteknik, Sumber Daya Air dan Manajemen Konstruksi) sebagai bentuk kekayaan intelektual. Diterbitkan sebanyak 2 kali dalam satu tahun yakni pada Bulan April dan Oktober.
Arjuna Subject : -
Articles 318 Documents
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Changes in The Flexural Strength Characteristics of Concrete Due To The Effect of Coconut Fiber Addition on Normal Concrete Darwis, Zulmahdi; Baehaki, Baehaki; Soelarso, Soelarso; Fathonah, Woelandari; Rahma, Midia; Ramadhan, Malik Agung
Jurnal Fondasi Vol 14, No 1 (2025)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v14i1.32200

Abstract

Concrete has high compressive strength, long durability, and easy maintenance. Innovation in using waste such as coconut fibers can improve the mechanical quality of concrete, reduce pollution, and provide added economic value. Fiber concrete is commonly used on broad structural elements to overcome expansion shrinkage due to oxidation, temperature, and evaporation. This study aims to determine the effect of the addition of coconut fiber waste and the optimum percentage on the bending strength characteristics of concrete. This research method is an experiment that compares the results of the bending strength test with the consideration of deflection that occurs on the force received from the variation of coconut fibers as much as 0%, 1.75%, 2.25%, and 2.75% of the weight of cement with a coconut fiber length of 65 mm, a planned quality of f'c 20 MPa, and using test specimens measuring 15 cm x 30 cm for cylinders and 15 cm x 15 cm x 60 cm for beams. Based on analysis and discussion, the addition of coconut fibers influences increasing flexural strength for a certain percentage with the addition of coconut fibers as much as 2.25% of the weight of cement showing the best flexural strength value with less deflection produced than other variations of fiber concrete at the same amount of force when charged.
Analysis of Time and Cost Acceleration with Crashing Method on Apartment Construction Project in Bekasi City Maddeppungeng, Andi; Asyiah, Siti; Intari, Dwi Esti; Ujianto, Rifky; Damanik, Mariana Feronica; Ashidiq, Alifian Taufiq
Jurnal Fondasi Vol 13, No 2 (2024)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v13i2.32711

Abstract

In the implementation of construction projects, problems are often found, such as delays. One of the solutions is by accelerating. Acceleration is not only done to overcome delays, but can also be done if there is a special request from the owner. This study discusses the acceleration of time and cost using the crashing method in an apartment construction project in Bekasi City, which aims to determine the optimal time and cost of the three alternatives used. The work that is accelerated is some structural work that is on the critical path. Acceleration is carried out with three alternatives, namely the addition of working hours, the addition of labor, and the combination of additional working hours and additional labor. The results showed that with the alternative of adding working hours, the implementation time was 298 days at a cost of Rp. 140,751,032,332, obtaining a time efficiency of 5.7% and a cost efficiency of 0.42%. With the alternative of adding labor, the implementation time is 292 days at a cost of Rp. 140,092,976,595, 7.59% time efficiency and 0.89% cost efficiency are obtained. With the alternative of adding working hours and additional labor, the implementation time is 290 days at a cost of Rp. 139,912,527,724, 8.23% time efficiency and 1.02% cost efficiency are obtained. Then it can be concluded that the alternative with the most optimal time and cost is the combined alternative of adding working hours and adding labor.
Analysis of Flood Discharge at Catchment Area of West Jurang Mangu Reservoir using HEC-HMS Purnaditya, Ngakan Putu; Jannah, Dahlia Raudothul; Subekti, Subekti; Priyambodho, Bambang Adhi; Wigati, Restu
Jurnal Fondasi Vol 14, No 1 (2025)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v14i1.32274

Abstract

High rainfall in Indonesia is one of the causes of flooding, especially in vulnerable areas such as watersheds. In addition to high rainfall, an increase in population and land use that is not in accordance with its function can worsen watershed conditions and cause an increase in flood risk. South Tangerang City is one of the areas prone to flooding, so flood control efforts are carried out such as widening rivers, raising embankments, and building retention ponds. Around the catchment area of the West Jurang Mangu Reservoir, flooding with a height of 50 60 cm still occurs, so further research was carried out at that location. In this study, the research method used QGIS to determine the catchment area, followed by hydrological analysis of the planned flood discharge using the HSS Synder method and modeling with HEC-HMS software. The results showed that the planned flood discharge using HSS Synder at return periods of 2, 5, 10, 25, and 50 years was 2.55 m3/s; 3.599 m3/s; 4.261 m3/s; 5.033 m3/s; and 5.718 m3/s.
Structural Analysis of Reinforced Concrete Column Dimensions in a Two-Story Building Using the Response Spectrum Method (Case Study: Villa Mahesa Anyer) Nofiana, Tiara; Cahyadi, Cahyadi; Kurniazaki, Muhammad Khafidin
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.36745

Abstract

The construction of a two-story building in an earthquake-prone area required a structural design that was safe, efficient, and compliant with standards. One of the key elements in such a design was the dimension of flat reinforced concrete columns, which were often selected for their space efficiency and aesthetic value. This study compared the column dimensions of three configurations: Alternative 1 with all flat columns, Alternative 2 with all square columns, and the existing structure combining flat and square columns, to determine whether each configuration met the earthquake resistance criteria based on SNI 1726:2019. This research employed a quantitative method using numerical modeling with SAP2000 student version software. The seismic analysis was conducted using the response spectrum method in accordance with SNI 1726:2019, with a case study of Villa Mahesa, a two-story building located in Serang Regency. The analyzed loads included dead loads, live loads, wind loads, and earthquake loads. The analysis results showed that Alternative 1 had a maximum displacement of 4.32 mm, a deflection of 0.85 mm, a stress ratio of 0.50, and internal forces of Pu = 121.99 kN and Mu = 18.13 kNm, with an interaction value of 0.96 < 1.00, indicating safety. The existing columns exhibited a displacement of 3.12 mm, a deflection of 0.78 mm, and a stress ratio of 0.32, but had an interaction value of 1.24 > 1.00, indicating that they were unsafe. Meanwhile, Alternative 2 produced the smallest deformation (displacement of 2.45 mm and deflection of 0.66 mm) but had an interaction value of 1.11 > 1.00, which did not meet the structural strength criteria. Based on these findings, Alternative 1 was recommended as the most optimal column design for two-story buildings in earthquake-prone areas.
Analysis of Liquefaction Potential Based on Standard Penetration Test (SPT) Data (Case Study: Transit Oriented Development Project in East Jakarta) Enden Mina; Rama Indera Kusuma; Woelandari Fathonah; Ina Asha Nurjanah; Prastika Wahid Santoso; Bayu Darmawan
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39878

Abstract

Liquefaction is a phenomenon in which solid soil becomes liquid, affecting soil stability due to an increase in pore water pressure. Liquefaction can cause damage to building structures and infrastructure, potentially resulting in significant losses. An analysis of liquefaction potential is required and is conducted using field Standard Penetration Test data. The method used is based on the approach developed by Seed and Idriss using SPT data. This study aims to determine the Safety Factor (FS) against liquefaction by comparing the Cyclic Stress Ratio (CSR) and the Cyclic Resistance Ratio (CRR). Soil layers are categorized as having liquefaction potential if the obtained FS value is less than one. The results show that the soil profile at the study location consists of medium to stiff clay and medium to dense sand, as indicated by relatively high average N-SPT values. The SPT calculations produce high CRR values, and the CSR values at the study location are also relatively high. This is caused by the earthquake acceleration value obtained from the DEEPSOIL software, which is 0.4 g. The safety factor values at the study location range from 0.4 to 0.8 at all SPT points, where FS values less than 1 indicate that the soil has the potential to undergo liquefaction.
Evaluation of the Performance of Urban Transportation on the Cilegon-Bojonegara Route in Cilegon City Using the Servqual Method Pradana, Muhammad Fakhruriza; Lestari, Neng Suci; Bethary, Rindu Twidi; Budiman, Arif; Intari, Dwi Esti; Suzanti, Wiwien
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39378

Abstract

This study evaluates the quality of urban transportation services on the Cilegon – Bojonegara route using the servqual method, which assesses the gap between passenger perception and expectations on five service dimensions. Data was obtained through questionnaires and field observations. The results of the study showed that all dimensions had a negative gap, with an average perception of 3.184 and an expectation of 4.005 The largest gap was in the guarantee dimension with a gap value of -0.960, followed by physical evidence, empathy and reliability. Meanwhile, responsiveness has the smallest gap with a value of -0.663. This indicates that the city's transportation services have not met passenger expectations, especially related to passenger comfort and safety, drivers drive recklessly. Recommendations for improvement include improving the quality of city transportation safety by optimizing driving speed to stay safe and not reckless, Improving the timeliness and clarity of the route by optimizing travel time so that it is not delayed, providing clearer routes and routes to passengers. The improvements are expected to improve service quality and customer satisfaction.
Narrow Pedestrian Corridors and Utilitarian Walker Satisfaction of Gajayana Street, Malang City Shafwan Naufal Qurniawan; Wisnu Sasongko; Chairul Maulidi
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39686

Abstract

Pedestrian corridor quality is commonly assessed through walkability, yet objective physical measures do not always reflect how constrained streets are experienced by everyday users. This study examines the relationship between walkability and user satisfaction across four segments of Gajayana Street, Malang, a narrow corridor used predominantly by utilitarian walkers. A quantitative descriptive approach was applied through field observation and a pedestrian perception survey involving 136 respondents. Walkability was measured using weighted infrastructure indicators, while user satisfaction was evaluated using the Customer Satisfaction Index (CSI). The results show that Segments 1, 2, and 3 were classified as not walkable, while Segment 4 performed better and reached the waiting to walkable category. Satisfaction followed a similar overall pattern, but not in strict proportion to physical conditions. Some segments with limited pedestrian support still received relatively better user responses when they remained usable for routine mobility and offered acceptable safety. These findings show that pedestrian corridor quality in narrow urban streets should be interpreted not only through infrastructure provision, but also through how everyday users assess practical usability under constrained conditions.
Comparative Evaluation of Seismic Response and Structural Performance of Two-Story Building Using Equivalent Static and Response Spectrum Methods Midia Rahma; Zikra Fauzan Virawan; Mahdika Putra Nanda; Ina Asha Nurjanah
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39673

Abstract

Seismic response analysis of building structures is essential, as different analytical approaches may produce varying predictions of structural behavior under earthquake loading. This study aims to compare the seismic response of a two-story building using two linear analysis methods, namely equivalent static analysis and response spectrum-based dynamic analysis. A three-dimensional structural model was developed using structural analysis software to evaluate key parameters, including natural period, base shear, and inter-story drift. The results indicate that the dynamic analysis produces higher base shear and lateral displacement compared to the static method. These differences suggest that the dynamic approach is more capable of representing realistic structural behavior by accounting for natural vibration characteristics and spectral acceleration. The findings highlight that dynamic effects play a significant role in determining structural response, even for low-rise buildings. Therefore, the application of dynamic analysis is recommended to improve the accuracy of seismic performance evaluation and structural design.
Optimizing Time and Cost of Column Formwork Work in Multi-Story Buildings Through a Zoning System (Case Study: Multimedia Nusantara School Project) Dwi Novi Setiawati; Siti Asyiah; Rifky Ujianto; Mush&#039;ab Abdu Asy Syahid; Ahmad Fauzan Ardiansyah
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39591

Abstract

Construction activities generally use concrete as the main material, one of which is in reinforced concrete columns that function to withstand vertical loads and distribute them to the lower parts of the structure. In the Multimedia Nusantara School project, which was carried out independently, formwork work often faced the challenge of completing the project quickly and at a low cost. Therefore, this study was conducted to examine effective and efficient work methods that reduce costs while maintaining quality, namely through the application of a zoning system. In this study, the work area was divided into two scenarios, namely 1 work zone and 2 work zones, to see the differences in their effectiveness. In addition, the types of column formwork used consisted of two types of materials, namely fiberglass formwork and conventional formwork. The main objective of this study was to determine the optimal work zone division model and to analyze the relationship and role of the zoning system in the time and cost efficiency of column formwork work. This research method was carried out using a qualitative descriptive approach using project planning data. The analysis was carried out using Microsoft Excel software to analyze the implementation time and cost estimates. The results of the study indicate that the application of two zones is the most optimal model for column formwork work. The application of the zoning system directly affects the relationship between time efficiency and cost. The shorter the cycle time applied, the higher the implementation cost tends to be due to more intensive use of resources. Based on the analysis results, the model with 2 zones and a 7 day cycle is the most efficient option, as it can speed up completion time to 44 days with a total cost of Rp294,899,522.
Risk Analysis in Public–Private Partnership (PPP) Schemes for Infrastructure Development in Indonesia: A Case Study of the Serang–Panimbang Toll Road Project, Section 2 Siti Asyiah; Rifky Ujianto; Mush&#039;ab &#039;Abdu Asy Syahid; Dwi Novi Setiawati; Annisa Rahman Tabrani Putri
Jurnal Fondasi Vol 15, No 1 (2026)
Publisher : JURUSAN TEKNIK SIPIL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62870/fondasi.v15i1.39689

Abstract

The limited capacity of the State Budget (APBN) to finance infrastructure development has led to a significant funding gap that must be addressed. To overcome this challenge, the Government has adopted an alternative financing scheme known as Public–Private Partnership (PPP). PPP is defined as a collaborative arrangement between the Government and private entities in the provision of infrastructure aimed at serving public interests. This study aims to identify the risks associated with the implementation of the PPP scheme in the Serang–Panimbang Toll Road Project, Section 2, and to determine appropriate strategies for risk mitigation and response. The research employs a quantitative approach using descriptive analysis. Risk assessment is conducted by comparing the Severity Index and the Probability Index to determine the level of risk. The results show that the majority of identified risks fall into high and extreme categories, with 15 variables classified as extreme risk, 23 variables as high risk, and 1 variable as moderate risk. The most critical risks are related to land acquisition, project scope changes, limited working space, geological conditions, and permitting processes, particularly during the pre-construction and construction phases. Mitigation strategies emphasize the importance of contractual clarity, stakeholder coordination, technical investigation, and financial preparedness, with several risks requiring shared responsibility between the government and private sector. These findings highlight the importance of proactive and integrated risk management to improve the performance and sustainability of PPP-based infrastructure projects.

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