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Rekayasa Sipil
Published by Universitas Brawijaya
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Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
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Articles 551 Documents
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Impact of Column Force on The Slope of a Gable Frame Roof Arini, Resti Nur Arini; Haykal, Fadel Muhammad; Kurni, Fadli; Ariyani, Dwi
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.2025.019.01.10

Abstract

One structure utilized in commercial and industrial buildings is the gable frame. This frame is tapered with slopes on both sides, making it a sturdy and effective construction. Since the stability of the rigid frame must be ensured by using gable frames, internal forces impact the frame's stability. Additionally, gable frames are made to support various kinds of loads. By analyzing the cross-sectional area and inertia that give rigidity to the size of the beams and columns in each element, the structure may be made more flexible. The impact of internal forces on the column on changes in roof slope will be analyzed as part of this study. To analyze the effect of columns on roof slopes, gable frame modeling is done using the STAAD Pro aid program, and the profile utilized is IWF 588x300x12x12. The 5o, 7o, 10o, 15o, and 20o slope variations are used to observe the impact of internal forces that occur in shape within the column for the Load and Resistance Factor Design (LRFD) method of cross-section control calculation analysis. SNI 1727:2020 is used for cross-section checks, and 17226:2019 is used for load calculations. According to the modeling results, a considerable axial force will be produced at a slope of 20 degrees. In contrast, a lesser slope angle will result in larger compressive and tensile stress, namely at a slope of 5 degrees. The gable frame's use of slope will impact the axial force by 4%.
Rainfall-Induced Slope Stability on Soil-Rock Mixture Adefi Abioga; Arief Rachmansyah; Yulvi Zaika
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.2025.019.01.11

Abstract

Many landslides are caused by rainfall, and antecedent rainfall plays a major role in slope failure. The landslide in Bululawang, Blitar, is one example of a slope that failed during a rainfall event. The stratification of the rock and soil in this area is complicated. There are several blocks of rock and clay-based soil in the landslide region, along with limestone. This study aims to examine how rainfall affects rock-mixed soil. Electrical resistivity tomography (ERT) was conducted to model the slope stratification combined with boring to verify the results. Soil properties mixed with rock (SRM) were estimated by rock block proportion on the slope. A transient model of slope stability analysis was created using the SEEP/W program to simulate slope seepage and SLOPE/W to compute slope stability. Following the antecedent precipitation, an extreme rainfall event occurred. The findings demonstrate how the slope in Bululawang Blitar is affected by antecedent rainfall, affecting the slope's initial state before applying intense rainfall. The elevation of the groundwater level and the pore water pressure on the slope are altered by antecedent rainfall. When examined, this phenomenon will impact the slope's safety factor. The slope safety factor (FoS) was reduced by 31.48% from 1.542 to 1.057 in the event of extreme rainfall, which does not satisfy the requirement for a slope safety factor of 1.25. The slope design utilizing a counterweight can optimally elevate the slope safety factor (FoS) from 1.057 to 1.461, which exceeds the required value of 1.25. SRM-type soil possesses high permeability, resulting in a rapid decline in the stability value of the slope in the event of extreme rainfall. Consequently, an early warning system tool is necessary to alert against landslide hazards.
Sustainability and Environmental Impact of Polymer Concrete with Styrene Monomer and GGBFS In Structural Applications: A Literature Review Nursamhuda, Wahyu; Susanti, Lilya; Wijaya, Ming Narto
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.2025.019.01.12

Abstract

Polymer concrete using styrene monomer and Ground Granulated Blast Furnace Slag (GGBFS) as key components show great potential in sustainability and environmental impact for structural applications. This study examines its ability to reduce carbon emissions, improve energy efficiency through recycled materials, and reduce reliance on Portland cement. Using styrene monomer enhances resistance to corrosion and cracking but also presents challenges related to volatile organic compound (VOC) emissions, which are harmful to the environment. The literature review concludes that although this polymer concrete shows promise as an environmentally friendly material, further development is needed to address sustainability challenges, particularly in production and material recycling processes. Additional research is required to overcome production efficiency and material recycling challenges.
Enhancing OSH Management Based on Risk Perception of Unsafe Behavior Among Infrastructure Construction Workers Arifai, Achmad Muhyidin; Fitrina , Rehani; Adenan
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.2025.019.01.13

Abstract

The construction sector faces significant occupational safety challenges due to its high-risk nature. This study examines unsafe behavior among construction workers at the Sultan Hasanuddin International Airport Main Terminal project in Makassar. It aims to identify key risk factors and their impact on worker safety. Data were collected from 99 respondents, including 96 workers and three project managers, through questionnaires, interviews, and observations. Using Exploratory Factor Analysis, seven major contributors to unsafe behavior were identified: Neglecting Fundamental Occupational Safety, Breach of Cautionary Signals and Safety Protocols, Careless Behavior and Work Inaccuracies, Performing Dangerous Work Without Proper Training, Neglecting Traffic Safety in Work Zones, Neglecting Equipment Safety and Maintenance, and Unsafe Operation of Machinery and Vehicles. The findings also reveal a significant difference in risk perception between field workers and managerial staff, with field workers showing a substantially lower awareness of risks associated with unsafe behaviors. These results highlight the need for targeted training, stricter safety enforcement, better equipment maintenance, and fostering a strong safety culture through leadership commitment and continuous communication.
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.
Domain of Property Value Determinants in Urban Areas Artiani, Gita
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.2025.019.01.15

Abstract

The construction industry has a strategic role in supporting the development of urban areas through the development of infrastructure, housing, and commercial space. However, rapid urbanization and the complexity of managing construction projects create challenges in determining optimal property value. Although many studies have been conducted on property values, studies specifically addressing the interaction between construction management and the determinants of property values in urban zones are still limited, especially in Indonesia. This study aims to identify and analyze various factors that affect property value from the construction management perspective through integrative literature studies. The analysis revealed 62 factors grouped into four main domains: types, causes, impacts, and solutions. Dominant factors such as land prices, transportation accessibility, and project sustainability significantly influence property value dynamics. In addition, the quality of construction implementation, technology selection, and project risk management are also key elements that affect the success of regional development. This identification provides strategic insights for construction managers, property developers, and policymakers in designing and executing projects supporting urban property value enhancement. Thus, this inquiry contributes to improving high-value, resilient, and sustainable areas by the principles of construction management and sustainable development goals.
Flexural behaviour of bamboo-based bamboo cement slab panels with GGBFS (Ground Granulated Blast Furnace Slag) Hylga Rohman; Murni Dewi, Sri; Susanti, Lilya
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.2025.019.02.1

Abstract

Recently, in response to the problem of global warming and the need for a sustainable society, production using natural materials has begun to increase. Bamboo, which is low in price, fast-growing, and widespread, is believed to contribute greatly to construction. Bamboo, available in abundance, can be used as a substitute for iron or wire. GGBFS, a residue from steelmaking, can be used as a substitute for cement in standard mortar or concrete mixes. The flexural properties of ferrocement slab panels using bamboo have been analyzed to increase the service capacity limit. Experimental studies were conducted on supported ferrocement slab panels with gradually increasing loads. The series of experiments involved testing 12 ferrocement slab panels of size 300 mm x 600 mm and thickness 50 mm. From these plates, 4 test samples were made using a conventional mortar mix of 1:2 and variations of 0%, 10%, 20%, and 30% cement replacement. Bamboo strips were used as structural reinforcement. The samples were poured, stored in moist gunny sacks for 28 days, and then tested with a three-point load. The test results were then compared with the theoretically expected results. The evaluation results showed that the initial cracking load and experimental failure load occurred at the center of the slab in all four types of slabs. The maximum load is about twice the initial cracking load. Each of the plates showed significant flexibility before reaching ultimate failure. In this case, cement bamboo slabs can be used for roofs or structures that do not require high loads.
Kayutangan Area's Road Network Performance Evaluation Post Implementation of Traffic Management Since 2023 Susanto, Bagus; Djakfar, Ludfi; Wicaksono, Ahcmad
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.2025.019.02.2

Abstract

Kayutangan Heritage Village is making various kinds of improvements in the arrangement around the area. After the implementation of traffic management and engineering in the Kayutangan area by the Malang City Government, there were several changes in flow from the north and south sides of Malang City, where several road networks in the area used a one-way system and changed the characteristics of the roads. By using 2023 IRCG and assisted by the VISSIM 2020 application, conclusions can be drawn with the changes that have been implemented in this area, Brigjend Slamet Riadi road section has VCr 1,116, Basuki Rahmat St (segment 1) 1,080, Basuki Rahmat St (segment 2) 0,732, Kahuripan St 0,781, Semeru St 0,850, Basuki Rahmat St (segment 3) 0,930, Brawijaya St 0,596, Jalan Mojopahit 0,978, Jalan MGR Sugiyopranoto (segment 1) 0,916, Aries Munandar St 0,798, MGR Sugiyopranoto St (segment 2) 0,951, Merdeka Utara St 0,234,  and Merdeka Timur St 0.909 with average VCr after traffic management is implemented is 0,85 – 1,20 during peak hours. This indicates that there is a need for recommendations for further handling to improve road network services.
The Impact of Resource Efficiency (5M) on Bore Pile Work Productivity Soetjipto, Jojok Widodo; Wulandari, Diah Ayu Restuti; Damayanti, Alvira Yong Wenda
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.2025.019.02.3

Abstract

Bore pile foundation work is an important stage in construction that requires high productivity to achieve the desired time and quality targets. However, productivity is often hampered by constraints on 5M resources. This research aims to determine the number of working hours lost due to obstacles originating from each resource during the implementation of bore pile work. In this way, the impact of constraints on productivity can be identified and analyzed quantitatively. Then, baseline productivity is determined to serve as a reference for measuring the level of disruption. Next, a recapitulation of project constraints is carried out to identify the independent and dependent variables. The validity and reliability of the independent variables were tested before carrying out multiple linear regression analysis using four classical assumptions. Factor coefficient model calculations were carried out to measure the influence of each constraint factor on productivity. Expected productivity and disruption index are calculated to determine the disruption and loss of productivity. Lost working hours are calculated based on the accumulated impact of these obstacles. The research showed that during the 37 days of bore pile work with 198.8 working hours, the material factor significantly reduced productivity, with a loss of 2,743 hours. Machine and Money factors also contributed to a decrease in productivity of 2,088 hours and 1,31 hours respectively. Meanwhile, the Method and Man factors analysis could not be carried out because the observation data showed invalid results. The conclusion of this research reveals that the material factor is the main obstacle that influences the productivity of bore pile work, followed by the Machine and Money factors.
Effect of pH Variations in Water Immersion on Concrete Compressive and Tensile Strength Sunujaya, Muhammad Alim; Soehardjono, Agoes; Nuralinah, Devi
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.2025.019.02.4

Abstract

Chemical elements, especially acids, can gradually cause concrete to deteriorate. When concrete deteriorates, the bond between the cement paste and aggregates weakens, decreasing compressive strength. This study aims to analyze the influence of pH levels on concrete's compressive and tensile strength. Concrete specimens with characteristic compressive strengths of 20, 25, and 30 MPa were immersed in solutions with pH levels of 4 (acidic), 7 (neutral), and 10 (alkaline) for 28 days. These study results are from experiments conducted at Brawijaya University, Malang. The results showed that an acidic environment can decrease the compressive strength of concrete. In contrast, immersion in an acidic solution (pH 4) significantly reduces the tensile strength compared to immersion in neutral and alkaline solutions. Concrete with higher characteristic compressive strength tends to have higher tensile strength, even when exposed to acidic environments. The conclusion drawn from this study is that an acidic environment (pH 4) significantly negatively impacts the tensile strength of concrete. Concrete with higher characteristic compressive strength exhibits better resistance to acidic environments. Neutral (pH 7) and alkaline (pH 10) environments yield better results than acidic environments.

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