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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 536 Documents
 47   48   49   50   51 
Identifying Structural Damage in Steel Truss Frames Using Computer-Based Numerical Simulation with the Second Order Blind Identification (SOBI) Method Haurissa, Ryan
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.5

Abstract

The failure of the building work is due to the structure failing to function and can also cause material losses and can even cause fatalities. Because of that, excellent and careful anticipation is needed. In this regard, the re-search that will be carried out is monitoring the structure's health by identifying structural damage based on vi-bration tests. Modal structural parameters are determined based on the vibration output using the Second Order Blind Identification algorithm created by numerical simulation in the MATLAB application. The method in this research is a laboratory experiment with two testing models, namely the modal parameter values of the typical truss structure and the damaged truss structure, using the Second Order Blind Identification algorithm method. Furthermore, analyzing the indications of structural damage from the estimated modal parameters, the accuser, and the effectiveness of the Second Order Blind Identification algorithm method is feasible to use. The results showed that the Hp sensor recording data that had been processed were the health15mts.mat and dam-age15mts.mat files loaded into the SOBI program, and the predicted value of the natural frequency of typical structures was 31,9072  rad/s, and damaged structures were 22,6089 rad/s. From the expected frequency, the frequency ratio value is 41.127 %. According to the Steel Frame Bridge Inspection Regulation No.005/BM/2009 Guidelines for Construction and Building of the Ministry of Public Works, Directorate General of Highways, if it exceeds 20%, it can be categorized as critical.  
Optimizing the Use of Water, Energy and Waste Resources in Green Buildings: Critical Review, Benefits and Challenges Firman Sarifudin; Jin, Oei Fuk
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.6

Abstract

Research on themes related to green buildings is very important because it relates to building environmentally friendly buildings that prioritize sustainability. However, Green Building and Sustainable Development Goals (SDGs) research tends not to be comprehensive because it only relates to building construction and energy efficiency. For this reason, this research will discuss various things about green buildings and criticize what has been analyzed, whether it is still appropriate or not, considering current conditions that already use wireless and IoT technology. Through literature review techniques, this research examines themes related to the civil sector and the implementation of Green Building goals and SDGs. The Systematic Literature Review (SLR ) method is used. Namely, in-depth criticism and evaluation of previous research carried out systematically by applying applicable standards, using the Viosviewer and Publish and Perish applications. This method examines research results published in journals in a particular field. Literature reviews discuss previous research that meets SDGS objectives and is related to the civil sector. This research used 300 earlier studies with a research period ranging from 2010-2023 or 14 years. The research results show that the theme that is often raised is green materials and technology. The use of technology to measure building performance and energy efficiency is the most widely discussed theme. However, the analysis of Green Building and SDGs is rarely linked to IoT technology, saving water use, rainwater utilization, environmentally based wastewater management, and green building education, even though this is closely related to cost efficiency, energy efficiency, and speed, in communicating to achieve SDGs goals.
Prediction of Creep Concrete in Lightweight Concrete with Pumice as Coarse Aggregate Maulidyah, Chairah; Wisnumurti; Desy Setyowulan
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.7

Abstract

Concrete creep is the additional strain that develops in concrete under constant stress over time. In this study, lightweight concrete is created by entirely replacing coarse aggregate with pumice to reduce the concrete's overall weight. The research involves producing 18 cylindrical concrete test specimens with a diameter of 150mm and a height of 300mm. These specimens include three normal and three lightweight concrete samples for each 90-day creep test and three normal and three lightweight concrete samples for compressive strength tests on the 14th and 28th days. The variation in aggregate proportions affects the aggregate content and weight in each type of concrete, influencing their properties. This is evident in the creep curves for the lightweight concrete samples. Similarly, the differences in the creep curves for normal concrete samples are attributed to stress distribution during loading. The strain acceleration between normal and lightweight concrete under load remains similar until the final loading day at 90 days. However, lightweight concrete significantly increases creep value after prolonged loading, rising by 35.85%. In contrast, normal concrete exhibits a creep increase of 16.51% from the beginning of loading until the 90th day.
The Experimental Test of Radial PE-Reinforced Polymer Pipe Under Short-Time Hydraulic Pressure Krisnawan, Bagus; Arifi, Eva; Setyowulan, Desy
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.8

Abstract

The resistance of thermoset polymer pipes to compressive forces is a concern in the reliability of piping infrastructure. To maintain the reliability of these piping systems, it is imperative to understand and improve the resistance of pipes. The use of polyethylene (PE) rope as Reinforce Polymer Pipe (RPP) composite material was tested with Short-Time Hydraulic Pressure to determine the stress-strain distribution as well as the durability of its mechanical properties. This study used 4mm diameter polyethylene rope arranged radially coiled inside a 40cm diameter polymer pipe with a thickness of 1cm using a mixture of Unsaturated Polyester Resin (UPR), fly ash, sand, catalys and cobalt. The test results show that the composite material has strong mechanical properties and is resistant to hydraulic compressive forces with an average deformation of 8.2 mm with an average maximum load of 33.57kN with the polymer experiencing cracks and damage but the polyethylene rope remains in good condition and has good ductile or elastic properties against compression without significant damage. The highest positive mean strain value of 0.4. The graph displays strain values that are continuously positive up to 50-100 seconds and then drop to negative values quickly indicating that the polymer pipe provides good resistance at the beginning of 50-100 seconds and then experiences damage but the pipe can still return to its original shape with damage to the polymer having an average maximum stress value of 5.23 Mpa with an average duration of 266 seconds while the lowest stress value is 3.34 Mpa.
Lessons Learned from Systematic Review for Circular Economy Adoption in the Indonesian Construction Industry Hidayah, Fitri Nur; Wimala, Mia
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.9

Abstract

As population growth continues, so does consumption and the need for basic human necessities, necessitating ongoing development. This development process often relies on non-renewable resources, generates waste, and emits harmful gases, usually neglecting sustainability. The Circular Economy (CE) concept can be applied to support sustainability in the construction industry. This regenerative system replaces the linear economy, focusing on optimizing material utilization and value throughout the product lifecycle and reducing waste generation. Through a Systematic Literature Review based on the Preferred Reporting Items for Systematic Review and Meta-Analysis (PRISMA) guidelines, this research provides an overview of CE practice trends that the construction industry in Indonesia can adopt based on lessons learned from other countries. The results indicate that CE implementation in Indonesia is highly relevant and important for supporting sustainability from economic, environmental, and social perspectives. To achieve these benefits, Indonesia must overcome various barriers, including less supportive policies, low consumer demand, limitations in the supply chain, and technological and infrastructure constraints. The CE principles commonly applied by the Indonesian construction industry in waste are reduction, reuse, and recovery. To ensure the successful implementation of CE in the construction sector, the Indonesian construction industry can learn from the best CE practices implemented in other countries and adopt effective and efficient strategies to achieve sustainability. However, successful implementation requires commitment and collaboration from various stakeholders, including the government, industry, and academia.
The Effect of Pilot Reaction Time and Line-Up Time on Runway Occupancy Time Take-Off about Runway Capacity (Case Study: Soekarno-Hatta International Airport) Indrawan, Mohammad Ardiansyah Putra; Rosmayanti, Lina; Abimanyu, Yudha
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.10

Abstract

One way to increase runway capacity is to set the Runway Occupancy Time Take-Off (ROTT) standard. Following the Aeronautical Information Publication of Soekarno-Hatta International Airport, the ROTT standard is set at 90 seconds. However, many aircraft have a ROTT of more than the standard. This can cause a decrease in the optimal level of runway capacity utilization. It is suspected that factors affect ROTT, namely Pilot Reaction Time and Line-Up Time. This study aims to analyze the effect of Pilot Reaction Time and Line-Up Time on ROTT at Soekarno-Hatta International Airport. The population used is aircraft taking off from Soekarno-Hatta International Airport, with the sample being aircraft taking off in peak seasons. The research method uses Quantitative Methods with observation data collection techniques using the Doratask Method. The data was processed using Non-Parametric Statistics using the Spearman Rank Correlation Method. The results of this study indicate that pilot reaction time has no significant effect on ROTT. However, pilot reaction time has a significant positive and strong relationship with ROTT. Line-up time significantly influences ROTT with a positive and very strong relationship. Pilot reaction time and line-up time simultaneously significantly influence ROTT with a positive and very strong relationship. Pilot reaction time and line-up time have a significant positive relationship.
Analysis of Biennial Peak Discharges in the Lower Kening River Using the Nakayasu Method Novita Putri, Ayuning Tyas; Mushthofa; Yulia Indriani
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.11

Abstract

Flooding is a persistent and challenging issue in many regions, requiring precise methods for estimating peak flood discharge to improve flood management strategies. Accurate discharge estimates are essential for designing effective flood control infrastructure and implementing mitigation measures. This study uses the Nakayasu Synthetic Unit Hydrograph (SUH) method to estimate peak flood discharge for a 2-year return period in the Kening River Flow Area, Parengan sub-district, Tuban district, and East Java Province. This research used various methods for rainfall analysis, including the Gumbel, Pearson III, and log-normal distributions. In contrast, rainfall intensity calculations were carried out using the Mononobe and ABM methods. The research highlights the effectiveness of these methods in predicting rainfall intensity and peak discharge, providing valuable insights for flood management practices. The results show that the Nakayasu SUH method predicts a peak discharge of 206.62 m³/second. By improving the accuracy of flood discharge predictions, this study supports better planning and design of flood control structures, which is crucial for managing flood risks and enhancing infrastructure resilience in flood-prone areas. These findings are expected to improve flood management practices and infrastructure planning.
Risk Analysis of Substation Electrical Project Suwaibah Al Aslamiyah; Hajji, Apif Miptahul; Alfianto, Imam
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.12

Abstract

The electricity infrastructure project is a complex construction project with many types, activities, and synergies from internal and external stakeholders.  The Gas Insulated Switchgear (GIS) 150kV of Gunungsari is a substation electrical construction project with delays in its construction process. The emergency of delays due to project risks that are not handled properly during the completion process and potentially create new risks. This study aims to identify the risks of project delays and determine effective risk treatment. The risk management process carried out in this study refers to ISO 31000:2018, which starts by defining the scope, context, and risk criteria, then continues with risk assessment, including risk identification, risk analysis, and risk evaluation, and then continues by determining risk treatment. Risk identification was obtained through literature study and Focus Group Discussion (FGD) with expert judgment involved in the project. The risk analysis results using the risk matrix obtained the most dominant risks, such as delays in project handover and additional item construction. The major risks included are those that require risk treatment to reduce the level of risk.
Comparison of Behavior of Reinforced Concrete Dual-system Structure (Frame-Shear Wall) and Steel Dual-system Structure (Frame- Special Plate Shear Wall) in High Rise Building (Case Study: IT Mandiri Bumi Slipi Building) Auliya Amir, Ahmad Yusron; Krisnamurti; Wiswamitra, Ketut Aswatama
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.13

Abstract

Indonesia is vulnerable to earthquakes due to its location on the “Ring of Fire,” recent research highlights the potential for megathrust earthquakes off the southern coasts of Java and Sumatra. Researching earthquake-resistant building structures' behavior is very important to obtain a more effective and efficient structure. Materials, structural types, and forces such as dead loads, live loads, and earthquake loads influence the structural behavior of high-rise buildings. IT Mandiri Bumi Slipi building, with a height of 149.6 m and 32 floors, exhibits structural irregularities vulnerable to earthquakes. High-rise buildings require earthquake-resistant systems, such as dual-system structures incorporating frames and shear walls. This study compares the behavior of reinforced concrete and steel structures (special plate shear walls) in a 32-story building, focusing on structural weight, beam bending moment, base shear force, and seismic displacement. The analysis used ETABS software and LRFD principles, with spectrum response analysis for seismic loads. Results showed that the reinforced concrete model had seismic base shear forces of 21578.87 kN in the X direction and 21577.91 kN in the Y direction, with drifts of 276.664 mm in the X direction and 141.33 mm in the Y direction, and the largest beam bending moment of 6713.27 kN-m. The steel model shows seismic base shear forces of 10927.52 kN in the X direction and 10929.99 kN in the Y direction, with drifts of 250.31 mm in the X direction and 119.33 mm in the Y direction, and the largest beam bending moment of 4221.82 kN-m. Steel structures are lighter and more effective at resisting seismic loads than concrete, with a weight of 257801.8 kN versus 508305.6 kN and smaller drift and shear force. These findings serve as a reference for innovation in earthquake-resistant construction of high-rise buildings.
Importance Factor Analysis of Quality Assurance for Contractor Competitiveness Ashari Putri, Mega Dewi; Devia, Yatnanta Padma; Anwar, M. Ruslin
Rekayasa Sipil Vol. 18 No. 3 (2024): Rekayasa Sipil Vol. 18 No. 3
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.2024.018.03.14

Abstract

Population growth led to massive construction development, with increasing demand every year. One of those demands is housing construction. The high demand for this house has led to the emergence of new contractors on a local scale, with products and services of unstable quality. Hence, the contractors need to be more competitive in the industry. This research aims to identify and analyze the important factors influencing quality assurance (QA) and the competitiveness of local contractors in housing construction projects. The analysis is grounded in three primary frameworks: ISO 9001:2015 (Quality Management Systems), PMBOK 6th Edition (Project Management Body of Knowledge), and Ministry of Public Works and Public Housing Regulation No. 4 of 2009. The research design used statistical analysis, Relative Importance Index (RII), and Analytical Hierarchy Process (AHP) to identify key factors. Research findings indicate that leadership commitment, project resources, and quality documentation are the three most critical factors. Regardless of the identified critical factors, all factors contribute to a significant influence on successful performance. The proposed strategic approach involves sequentially improving the "quality of work output," followed by "customer retention" and "project cycle efficiency." These findings can serve as a guideline for contractors in making decisions to enhance their competitiveness.

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