Original Article93 downloads
Analysis of the Soiling System in the Bukit Berkapur District in the Uluwatu Area, South Bali I Nyoman Gede Adrama*, I Nengah Riana, I Made Asna Department of Electrical Engineering, Universitas Pendidikan Nasional. Denpasar, Indonesia. Page: 1-4
This study discusses the design and implementation of a paving system in a calcareous hill area in the Uluwatu area, South Bali. This area has unique soil characteristics with high resistivity that can affect the effectiveness of the grounding system. The main objective of this study is to develop an effective grounding system and meet applicable electrical safety standards.
The methodology used includes soil resistivity analysis, selection of materials and appropriate electrode designs, and the use of additives to improve soil conductivity. The results of soil resistivity measurements show significant variations at several points, which are the basis for determining the location and configuration of the electrode. The electrodes used are made of copper and galvanized steel, with the addition of bentonite to improve contact with the ground.
The grid or net system is chosen as the main design to evenly distribute the grounding current. Initial testing after installation showed that the designed grounding system was able to lower soil resistance to safe values and meet safety standards.
This study concludes that with proper analysis and the use of appropriate technology, grounding systems in calcareous hill areas can be implemented effectively. This result is expected to be a reference for the design of a grounding system in areas with similar soil conditions in Indonesia.
Original Article81 downloads
Proposal for a tool for analyzing the physical state and functionality of municipal built heritage for sustainable and proactive management of local infrastructure Ahonankpon Hubert Frédéric GBAGUIDI*, Luc Sèhouégnon AHANHANZO, Smail SALIFOU, Lamatou DAOUDA Research Unit for Sustainability of Urban Infrastructure and Services (UR-DISUr), Laboratory of Geosciences, Environment and Applications (LaGEA), National University of Sciences, Technologies, Engineering and Mathematics (UNSTIM), Abomey, Benin. Page: 5-9
Municipalities' built heritage constitutes a strategic lever for the provision of basic public services. However, in many communities, its maintenance remains insufficiently structured, due to a lack of tools adapted to assessing its actual condition. This article proposes a simplified but robust analysis grid, focused on two essential dimensions: physical condition and functionality. The tool was designed to enable municipalities to detect deterioration, anticipate interventions, and prioritize corrective actions. It integrates an alert mechanism based on a rating system that classifies buildings into four critical levels. Finally, this research draws on the case of the municipality of Nikki in northeastern Benin and proposes a model transferable to other contexts in sub-Saharan Africa.
Original Article268 downloads
Multi-Criteria Spatial Analysis in Determining the Location of Centralized Domestic Waste Disposal on a Small City Scale Muhammad Ismail, Bimo Brata Aditya* and Dinar Dwi Anugerah Putranto Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University, Jl. Raya Palembang-Prabumulih Km. 32, Inderalaya, South Sumatera, Indonesia. Page: 10-19
Indonesian government is working to improve how household waste is handled in small cities as part of its efforts to support long-term development in providing clean water and sanitation for all, as reviewed in Sustainable Development Goal 6 (SDG 6). The objective of the country is to ensure that by 2025-2045, at least 70% of people have access to proper sanitation according to the National Long-Term Development Plan (RPJPN). Therefore, this study aimed to identify the best location to build an integrated waste disposal sites in small towns, using Muara Rupit City, the newly designated capital of North Musi Rawas Regency as an example. To identify suitable location, the study used a method that looked at different factors together called Multi-Criteria Spatial Analysis (MCSA) and a decision-making tool known for as the Analytic Hierarchy Process (AHP). The data used in the analysis came from several sources, including land use and plant coverage from satellite images (Sentinel 1 A), Digital Elevation Model (DEM) with a 2.5 m resolution, a spatial plan map of Muara Rupit City, as well as natural conditions such as rainfall and soil type. This study classified and scored different areas using GIS (Geographic Information Systems) technology. AHP was then used to calculate how important each factor was in selecting location. The analysis showed a consistency ratio of 2.8%, meaning the results were reliable. The study found that GIS-based method was effective in helping decision-makers select suitable places for waste disposal. The final result was a map showing areas that ranged from not very suitable to highly suitable. However, only a small part around 10% of the total study area was considered suitable, with just 2% being ideal for integrated waste disposal. In total, about 4722.21 hectares in the district were found to be appropriate for these facilities.
Original Article99 downloads
Flood Risk Management Analysis Through Rainwater Management Approach in The Sub Watershed Area of Buah, Palembang City Helda Sari, Imroatul Chalimah Juliana* and Taufik Ari Gunawan Department of Civil Engineering and Planning, Faculty of Engineering, Sriwijaya University, Jl. Raya Palembang-Prabumulih Km. 32, Inderalaya, South Sumatera, Indonesia. Page: 20-30
This study aims to analyze flood risk management through a rainwater harvesting approach in the Sub-Watershed (Sub DAS) Buah area of Palembang City. The location was selected due to its frequent annual flooding caused by suboptimal drainage systems. The research employed both qualitative and quantitative methods. Data collection techniques included field surveys, observations, interviews, brainstorming, and questionnaires. A total of 25 types of flood-related risks were identified 8 adapted from previous relevant studies and 17 newly identified through direct observation and assessment of the existing drainage infrastructure and community responses. Risk acceptance analysis revealed that most risks across planning, implementation, and operation & maintenance (O&M) aspects fall into the "unacceptable" and "undesirable" categories. Differences were observed between expert and general respondents in their perception of risk levels; however, all three aspects consistently showed a significant presence of high-risk conditions requiring immediate mitigation efforts. The proposed mitigation strategies consist of four main approaches: risk retention, risk reduction, risk transfer, and risk avoidance. Among these, the implementation of a rainwater harvesting system is considered the most suitable and effective in significantly reducing risk levels. Moreover, this approach enhances drainage efficiency and strengthens the region's capacity to manage floods sustainably. The findings of this study are expected to serve as a basis for informed decision-making in flood control strategies that are adaptive and risk-based.
Original Article22 downloads
Electrolytic Honeycomb Dampers with In-Situ Reactivation: A Novel Seismic Retrofit Strategy for Liquid Hydrocarbon Containment Vessels Ali Aghazadeh Dizaji*, Abdulkadir Cüneyt Aydın, Dr. Nima Gheitarani Department of Civil Engineering, Engineering Faculty, Ataturk University, 25030, Erzurum, Turkey. Page: 31-58
The seismic
vulnerability of large-scale liquid hydrocarbon containment vessels represents
one of the most consequential unresolved challenges in critical industrial
infrastructure protection, as evidenced by the cascading fires, environmental
contamination, and prolonged operational disruptions that have followed tank
failures in major earthquakes worldwide. Existing retrofit strategies,
overwhelmingly predicated on the addition of shell stiffening rings, local
thickening of shell courses, or enhanced anchorage systems, address the
strength and stability dimensions of the seismic response problem while leaving
the fundamental energy dissipation deficit unaddressed, a limitation that has
become increasingly untenable as resilience-based design frameworks demand not
merely collapse prevention but assured post-earthquake leak-tight integrity.
The findings establish that the electrolytic honeycomb damper, in its baseline
configuration employing a twelve-millimeter cell side length, a one-and-a-half-millimeter
cell wall thickness, a two-meter active damper height, and a magnetic flux
density of 0.85 tesla generated by a neodymium-iron-boron Halbach array,
imparts an equivalent viscous damping ratio of 16.7 percent of critical to the
fundamental impulsive mode of the tank-fluid system, representing an eight-fold
augmentation relative to the intrinsic damping of the unretrofitted welded
steel shell. This damping augmentation translates into a 38 percent reduction
in the spatially averaged peak impulsive hydrodynamic pressure acting on the
tank wall at the design basis earthquake level, from 84.6 kilopascals to 52.4
kilopascals, while the radial stiffening action of the bonded honeycomb core
elevates the median critical buckling acceleration by 45 percent, from 0.51g to
0.74g, with an accompanying reduction in the record-to-record variability of
the buckling capacity. The in-situ reactivation concept, demonstrated through a
ten-cycle degradation-reactivation sequence on the experimental model, achieves
a reactivation efficiency of 98.2 percent after the first cycle and retains in
excess of 90 percent of the initial damping capacity after the equivalent of
fifty years of service life, confirming that the electrochemical degradation
historically regarded as the fatal flaw of electrolytic damping can be
effectively reversed through periodic controlled application of a
reverse-polarity charging current that exploits the fully reversible redox
chemistry of the selected vanadium couple. The dimensionless design correlations
that relate the equivalent viscous damping ratio and the hydrodynamic pressure
reduction factor to the damper geometric parameters, the magnetic field
strength, and the electrolyte properties are presented in tabular and graphical
form, constituting a self-contained design methodology suitable for adoption
into seismic retrofit practice. The broader significance of this work lies in
its demonstration that a bio-inspired honeycomb architecture can
synergistically integrate mechanical, electromagnetic, and electrochemical functions
into a single multi-physical device, establishing a paradigm that may be
extended to the seismic protection of other classes of critical infrastructure
for which conventional damping technologies are unsuitable and opening a new
interdisciplinary territory at the intersection of structural engineering,
electrochemistry, and magneto hydrodynamics.