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All Journal Jurnal Penelitian Pendidikan IPA (JPPIPA) Journal of Novel Engineering Science and Technology
Retno Anggraini
Brawijaya University
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Environmental Science Materials Science & Nanotechnology Mechanical Engineering Physics

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Application of Risk Management Science in Construction Project Learning: Cost Contingency Study in Malang Raya Housing Fairuz Firyal Qonitah; Achfas Zacoeb; Retno Anggraini
Jurnal Penelitian Pendidikan IPA Vol 11 No 7 (2025): July
Publisher : Postgraduate, University of Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jppipa.v11i7.11728

Abstract

Housing projects are classified as complex and therefore require risk management analysis for economic and business sustainability for developers. Objective: To apply the risk management science approach to understand the dynamics of contingency costs in real housing construction projects and relate it to strengthening student competencies in construction project-based learning. Method: This research is descriptive because it aims to provide an overview of the facts in the field and the observed phenomena regarding the analysis of dominant contingency cost factors in housing development projects in Malang Raya. Data analysis: Data was obtained through interviews and questionnaires, then analyzed on several factors that influence cost contingencies in housing projects. Results: The dominant factors influencing contingency costs in housing development projects in Malang Raya consist of four main factors: Design, financial, human resources, and engineering. The contingency costs in housing development projects in Malang Raya generally range from 5% to 7.5% of the total project value. Contingency costs are higher in type 36 and 45 housing projects, especially with DP below 20%. Solutions that can be implemented to address risks that cause contingency costs to arise include preventive and corrective actions tailored to each risk factor.
Seismic Performance of FRP-Retrofitted RC Building Using Pushover Analysis Nabil Mochammad Yusuf; Ari Wibowo; Retno Anggraini
Journal of Novel Engineering Science and Technology Vol. 5 No. 01 (2026): Journal of Novel Engineering Science and Technology
Publisher : The Indonesian Institute of Science and Technology Research

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56741/jnest.v5i01.1452

Abstract

The seismic evaluation of existing bank office buildings is critical for ensuring post-earthquake operational continuity. This study investigates a 14-story RC bank building in Kendari using the Nonlinear Static Procedure (NSP) per ASCE 41-17, targeting an Immediate Occupancy (IO) performance level. The initial analysis revealed a critical contradiction: while the structure's global performance appeared to meet the IO target, this assessment was found to be misleading. A detailed, element-based analysis identified a concealed local failure where a critical beam reached the Life Safety (LS) performance level, caused by a non-trivial Positive Moment at the support. A sequential Fiber Reinforced Polymer (FRP) retrofitting strategy was then implemented. The primary contribution of this study is the demonstration of the Failure Migration phenomenon. It was shown that a naive, 'single-point' retrofit (on LS-1) did not solve the problem but merely shifted the failure mode to the next weakest element (LS-2). This sequential retrofitting procedure proved necessary to track the migrating failure, which moved non-linearly between various floors, until all migrating vulnerabilities were eliminated. This finding proves that a sequential procedure is necessary to address Force Redistribution and achieve a true IO performance. The final minor global base shear increase (0.16%) was only a secondary benefit, confirming the objective was local vulnerability elimination, not a significant increase in global stiffness.
Co-Authors Achfas Zacoeb Ari Wibowo Fairuz Firyal Qonitah Nabil Mochammad Yusuf