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All Journal CIVED (Journal of Civil Engineering and Vocational Education) Paduraksa : Jurnal Teknik Sipil Universitas Warmadewa Jurnal Teknologi Rekayasa Sipil Jurnal Rekayasa Sipil Jurnal Rekayasa Sipil axial : jurnal rekayasa dan manajemen konstruksi Teknomekanik ABDI MOESTOPO: Jurnal Pengabdian pada Masyarakat Jurnal Inovasi Masyarakat JUTIS Jurnal Pengabdian West Science Jurnal Teknik Sipil Journal of Civil Engineering and Vocational Education Media Konstruksi : Jurnal Ilmiah Teknik Sipil Prosiding Seminar Nasional Ilmu Teknik Proceeding of The International Conferences on Engineering Sciences
Citra, Zel
Civil Engineering Department, Universitas Mercu Buana, 11650, Indonesia
Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation

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Journal : Rekayasa Sipil

 1 
Factors Affecting the Occurrence of Cost Overrun Based on Relative Importance Index (RII) on Toll Road Projects Magdalena, Sara; Citra, Zel
Rekayasa Sipil Vol. 19 No. 1 (2025): Rekayasa Sipil Vol. 19 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.01.14

Abstract

In the implementation of a construction project, it is not uncommon for many obstacles to arise during its continuity, resulting in one of the common impacts, namely cost overrun. Referring to some of the problems that arise, it is calculated that there is a cost overrun of around 30% of the initial value. This research uses quantitative research methods by collecting data and distributing questionnaires. After that, some data was tested with the help of SPSS and the analysis method, namely the Relative Importance Index, to process the data. Based on the analysis carried out, the top 5 (five) rankings were obtained sequentially related to the occurrence of cost overrun in construction projects, namely frequent delays in work with an RII score of 0,8, incomplete/inappropriate information, and data provided with a score of 0,7, slow arrival of materials during implementation with a score of 0,689, improper project scheduling with a score of 0,689, and high frequency of equipment repair with a score of 0,611, as for the control measures that can be concluded, including making written records or records of events and things that cause these factors, communicating to the employer along with the consequences that can occur, and several other control measures according to the factors faced. From the study's results, it can be concluded that this research is something new and can be beneficial and used primarily by contractors to understand and find the right solutions for toll road project work and develop for other projects that experience cost overrun.
Application of Ultrasonic and Coating Material Thickness Testing on Post-Fire Steel Construction Citra, Zel; Antonius; Biantoro, Agung Wahyudi
Rekayasa Sipil Vol. 19 No. 2 (2025): Rekayasa Sipil Vol. 19 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2025.019.02.12

Abstract

Steel has advantages over other construction materials, including flexibility and processing time. Steel has better elasticity and relatively faster processing time compared to reinforced concrete. However, the weakness is that steel is also very susceptible to temperature changes. If a steel material experiences an increase in temperature, for example, if it is directly exposed to fire, its yield and tensile strength will decrease drastically. This can cause the function of the steel material as a structural element to change. In early 2023, a fire occurred in a steel construction tower used for animal feed processing, PT. XYZ in the Lampung area. As a result of the fire, there is a concern about the risk of structural failure, which could cause worker fatalities in the building. So, it is necessary to test the thickness of steel tower structural elements such as columns, beams, and bracing using the Non-Destructive Test method with an Ultrasonic Material Gauge and Material Coating Thickness. The test samples were taken in as many as 20 samples with the test structure including column elements, beam elements, and bracing at each level or elevation of the fire-affected floor. Test sample include WF200X100X5,5x8, WF250X125X6X9, WF300X150X6,5X9, WF400X200X8X13, HB400X400X13X21 and Pipe Ø6”. The results of the post-fire steel structure measurement, the thickness of columns, beams, and bracing from 20 samples, showed that 95% still met the thickness tolerance of 0.7 mm- 1.2 mm based on the SNI 07-0329-2005. The thickness of the post-fire coating, 95% steel structural coating, did not meet the standards below 240mm. Only 5% met the minimum coating thickness standards, such as pipe bracing Ø6" with a coating thickness of 397 microns. And for repair, repainting is recommended. Repainting must be done to prevent corrosion and restore the structure's safety.
Integration of Java Programming-Based Pert and Earned Value Management Methods Based on Residential Precast Case Study to Improve Project Cost Efficiency Citra, Zel; Wibowo, Paksi Dwiyanto; Malinda, Yosie; Pranoto, Rodliyan Yusuf; Pitaloka, Fanny
Rekayasa Sipil Vol. 18 No. 1 (2024): Rekayasa Sipil Vol. 18 No. 1
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2024.018.01.3

Abstract

The need for residential houses is still high for property and construction commodities. The availability of land and market prices for residential houses continue to increase yearly. Only 45.04% of Jakarta residents had a home ownership status in 2020. 2021 is the precast building mode. It is justified that precast construction structures can save 35% on construction costs and are 27.33% more reliable than ordinary concrete structures. The research examines the integration of the PERT method and earned value management (EVM) based on Java programming in residential precast case studies. The results of this study are that the implementation of the PERT method can increase the efficiency of project duration by 6%, and the implementation of the EVM method can increase project cost efficiency by 7% with the indicators Schedule Performance Index (SPI) = 1.01 (under schedule) and Cost Performance Index = 1, 07 (Under Budget)
Inspection of Foundation Structures with Pile Integrity Test (PIT) of Steel Tower Building Citra, Zel; Malinda, Yosie; Dwiyanto Wibowo, Paksi; Ferial Ashadi, Reza; Wibisono, Anom; Apdeni, Risma
Rekayasa Sipil Vol. 18 No. 2 (2024): Rekayasa Sipil Vol. 18 No. 2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2024.018.02.10

Abstract

Pile Integrity Test (PIT) is a tool from Pile Dynamic Inc. (PDI), consisting of a mini-computer, accelerometer, and hammer. Integrity testing on piles using PIT equipment is carried out by analyzing one-dimensional wave propagation provided by hammer blows on the pile head. An accelerometer sensor installed on the pole will read the reflection that occurs during wave propagation on the pole head. The wave propagation speed that occurs in concrete will range from 3,500 m/s to 4,200 m/s. The PIT test results indicate the reduction in impedance in the pole by the BTA value, which compares the theoretical impedance value to the residual impedance. From the results of the Pile Integrity Test carried out at three pile points, it was found that all samples experienced a reduction in impedance around a depth of ± 3.0 meters below the sensor with BTA values of 75%, 78%, and 72% and fell into the damaged category. The reduction in impedance at a depth of 3 meters is most likely part of the connection between piles because one pile point uses 2–3 spun piles, with the length of 1 spun pile being 9 meters. From the results of visual observations, it can be seen that the condition of the existing spun pile and pile cap is still quite good.
Co-Authors Adistana, Herlis Sweta Adriansyah Adriansyah Agung Wahyudi Biantoro Ali Amran Anom Wibisono Antonius antonius antonius Antonius Antonius Ashadi, Reza Ferial Budi Susetyo Cahya Suryadi Christian Bessie, Steaven Det Komerdevi Dharmapribadi, Ernanda Elza, Suci Putri Erlangga Rizqi Fitriansyah Erlangga Rizqi Fitriansyah Ernanda Dharmapribadi Fitra Rifwan Fitriansyah, Erlangga Rizqi Frangklyn Sinulingga, Jef Gede Ananda Kusuma, I Dewa Haifan, Mohamad Hamonangan Girsang Hasdian, Elhazri Herol, Herol Intan Purnama Sari Jef Frangklyn Sinulingga Lily Kholida Lumingkewas, Riana Herlina Magdalena, Sara Malinda, Yosie Mana Marang, Maria Natalia Melina Lubis, Nadia Tutur Melinda, Annisa Prita Mukhlisya Dewi Ratna Putri Nevy Sandra Paksi Wibowo Pitaloka, Fanny Pranoto, Rodliyan Yusuf Putri, Prima Yane Reni Karno Kinasih Risma Apdeni Risma Apdeni Sawarni Hasibuan Sinulingga, Jef Frangklyn Tathia Edra Swasti Vidayanti, Desiana Wibowo, Paksi Dwiyanto