JURNAL TEKNIK SIPIL CENDEKIA (JTSC)

FAKTOR YANG MEMENGARUHI KEMITRAAN KONTRAKTOR DAN PERANCANG DALAM PROYEK DESIGN AND BUILD

Achmad Sutowo, Agustinus Purna Irawan, Endah Murtiana Sari, Oei Fuk Jin — Wed, 25 Feb 2026 00:00:00 +0000

The government is currently encouraging readiness in government projects using the Design & Build project delivery system, as regulated in the Construction Services Law No. 7 of 2017. Design and Build (DB) from various previous literature has been proven to provide advantages compared to Design Bid Build (DBB) including speed of implementation, project risks, design changes and the absence of change orders during project implementation. This study aims to examine what factors influence the partnership of contractors and designers in design and build projects to produce good project performance including cost, quality, time, K3 and environment. The research method used in this study is a quantitative method with 50 respondents and processed through SPSS to explore respondents' perceptions, about factors that are considered to influence the partnership of contractors and designers in Design and Build (DB) projects. The respondents came from contractors and consultants who have worked on government projects with design & build project delivery. The results of this study indicate six key factors influencing contractor–designer partnerships in Design and Build projects, including relationship factors, process factors, and environmental factors, with partnership maturity acting as a moderating variable. These factors contribute to improved project performance in terms of cost, quality, time, safety, and environmental aspects. The findings provide practical insights for contractors and designers in strengthening collaboration and readiness for implementing Design and Build project delivery systems.

A STUDY OF FINANCIAL FEASIBILITY OF MOANAMANI MICROHYDRO POWER PLANT (PLTMH) (A CASE STUDY IN EKEMANIDA VILLAGE, MOANAMI DISTRICT, DOGIYAI REGENCY)

Ira Widyastuti, Paseru R. L, Hery Dualembang, Eka P. Kombong, Herlina Sanggamele — Wed, 25 Feb 2026 00:00:00 +0000

Micro Hydro Power Plants (PLTMH) with a capacity of <1MW are an alternative energy source to replace fossil fuels in remote areas, one of which is the PLTMH in Moanamani Distric, Papua Province, Indonesia, managed by PT. PLN (Ltd). Due to a construction collapse at the dam, the Moanamani Micro Hydro Power Plant is now sustaining damage that is harming other supporting facilities. Given the tight budget in the area, particularly in Dogiyai Regency, the goal of this study is to secure a capital finance and loan plan that can then be discussed by the pertinent stakeholders. This study analyzed the potentials of renewable energy and economic finance of the PLTMH, measuring the Net Present Value (NPV), Internal Rate of Return (IRR), Benefit Cost Ratio (BCR), Pay Back Period (PBP), and Break Event Point (BEP). The results showed that the debit of Tuka River could generate at least 65.50 kW of power and an annual energy of 50,546 kWh. The investment value of PLTMH at Moanamani Village was IDR 6,600,000,000, and the Cost of Goods Sold was IDR 336,384/kWh. Based on the economic calculation, the NPV of PLN Ltd was IDR 6,300,000,000, the NPV of the community was IDR 1,987,056,834, the IRR was -1,79%, the BCR was 0.32, the PBP was ± 20 years, and the BEP was ± 50 years. The development project of PLTMH with a funding scheme of 30% equity and 70% loan showed that the project was not financially feasible.

PENDUGAAN POTENSI AIR TANAH DENGAN METODE GEOLISTRIK KONFIGURASI SCHLUMBERGER DI PEKON PAGAR DALAM KECAMATAN LEMONG KABUPATEN PESISIR BARAT

Heri Budianto, Nur Syahidah Aini, Farid Nanda Syanur — Wed, 25 Feb 2026 00:00:00 +0000

This study aims to analyze the distribution, depth, and thickness of groundwater aquifers in Pekon Pagar Dalam using the geophysical method of Schlumberger geoelectric resistivity configuration. This method is effective for identifying the electrical flow properties of subsurface rocks to determine the characteristics of the water-bearing layer. Field data was processed using hardware and software, namely Res2Dinv and Surfer 12. The results showed that the subsurface structure consists of the Old Quaternary Volcanic Formation with a resistivity value of 36 - 61 Ohm m at a depth of 0 - 30 m. Shallow aquifers that are the source of dug wells are found at a depth of 3–7 m, while aquifers with higher potential are located at a depth of 20–30 m, while aquifers with higher potential are at a depth of 20 - 30 m. Based on data correlation in Pekon Sukajadi, which has a sandy layer, the groundwater table is found from a depth of 35 m with a discharge of 1.5 liters/second. Analysis of the formations on the slopes of Bukit Barisan shows that the raw water in the research location is suitable for consumption. The estimated Total Dissolved Solids (TDS) value ranges from 100 - 200 mg/L, which meets the raw water quality requirements (maximum 250 mg/L).

PENGARUH BAHAN PIPA TERHADAP PELURUHAN KONSENTRASI KLORIN DALAM SISTEM DISTRIBUSI AIR MINUM

Sumardi Sumardi — Wed, 25 Feb 2026 00:00:00 +0000

The main disinfectant used in drinking water distribution systems to preserve microbiological quality is chlorine. However, over time, the concentration of chlorine tends to decrease due to interactions with pipe surfaces (wall decay) and chemical reactions in water (bulk decay). This study uses a first-order decay mathematical model to examine the chlorine decay rate under batch conditions, PVC pipes, and iron pipes. The research was conducted through laboratory tests with an initial chlorine concentration of 1.80 mg/L, observed over 7 days. The measured data were compared with predictions from the mathematical model, ????(????) = ????0 ????^?????????????. Model fit analysis was performed using the Root Mean Square Error (RMSE) and coefficient of determination (R²). The results showed that, under batch testing, the chlorine concentration decreased to 0.46 mg/L with a rate constant ???? = 0.12 day^?1; under PVC pipe conditions, it decreased to 0.30 mg/L with ???? =

0.17 day^?1; and under iron pipe conditions, it decreased to 0.15 mg/L with ???? = 0.25 day^?1.The highest model accuracy was achieved in the batch test, with RMSE = 0.06 and R² = 0.98, while PVC and iron pipe tests had lower accuracy with RMSE values of 0.08 and 0.10, and R² values of 0.96 and 0.95, respectively. The study concluded that the pipe material significantly affects the chlorine decay rate, with iron resulting in the highest decay due to complex surface interactions. This study provides a calibrated database and chlorine decay model for water–material interactions (PVC vs. iron) under controlled test conditions

AWARENESS STAKEHOLDER PROYEK TERHADAP TRANSFER PENGETAHUAN DALAM TIM PROYEK KONSTRUKSI

Catur Ayu Almaidia, Christiono Utomo — Wed, 25 Feb 2026 00:00:00 +0000

Knowledge transfer is a critical factor in the success of construction projects, considering the temporary, complex nature of projects and the involvement of multiple stakeholders. Project Managers and project teams play strategic roles in facilitating knowledge sharing within project teams; however, in practice, knowledge transfer in construction projects remains suboptimal, indicating a low level of stakeholder awareness regarding the importance of this process. This study aims to analyze the level of stakeholder awareness concerning knowledge transfer within project teams. Employing a quantitative descriptive approach, the study utilizes purposive sampling to select 100 respondents comprising Project Managers and construction project team members in Surabaya. Data were analyzed using descriptive statistics to illustrate the level of awareness and tendencies in the application of knowledge transfer in the field. The results reveal differences in awareness levels between Project Managers and project teams, as well as a gap between the recognition of the importance of knowledge transfer and its practical implementation. These findings suggest that although project stakeholders understand the significance of knowledge transfer, its application remains inconsistent. This study offers practical implications for construction project management, particularly in enhancing the role of project stakeholders in fostering a knowledge-sharing culture to support project success.

AWARENESS PEMANGKU KEPENTINGAN TERHADAP BERBAGI PENGETAHUAN PADA TAHAPAN DESAIN-KONSTRUKSI-OPERASIONAL

Ni Putu Eka Utari Putri, Christiono Utomo — Wed, 25 Feb 2026 00:00:00 +0000

The construction industry in Indonesia plays a strategic role in supporting the national economy, but still faces various challenges related to efficiency, sustainability, and knowledge management. Knowledge sharing among stakeholders is key to improving project management effectiveness, strengthening collaboration, minimizing errors, reducing risks, and driving innovation and operational sustainability of buildings. Nevertheless, knowledge sharing practices in construction projects are still not optimal, leading to issues such as rework and low efficiency. This research aims to examine the level of stakeholder awareness regarding knowledge sharing during the design, construction, and operational phases of property projects in Surabaya and to provide recommendations for knowledge management strategies to improve the effectiveness of project memory management. This research uses a quantitative descriptive method with purposive sampling technique. Data was collected by distributing questionnaires to 100 respondents involved in the project stages. The analysis results show that although the conceptual understanding of knowledge sharing is quite well-known, its implementation in the field is still not optimal. The majority of respondents prefer oral knowledge exchange over written documentation. Additionally, access to and utilization of explicit knowledge stored in digital systems is considered to be still very low. There is also an influence between length of work experience and the level of understanding and application of knowledge-sharing practices. Overall, this research concludes that awareness of the importance of knowledge sharing exists, but significant challenges remain in its implementation, particularly regarding systemic support, technological infrastructure, and a supportive organizational culture.

PENGEMBANGAN MODEL STRATEGI INTEGRATIF LIMA REGULASI TEKNIS DALAM PERENCANAAN TRANSPORTASI PERKOTAAN UNTUK MEWUJUDKAN KESEIMBANGAN DAYA DUKUNG–DAYA TAMPUNG

Tony Kristiawan, Leksmono Suryo Putranto, Haris Muhammadun — Wed, 25 Feb 2026 00:00:00 +0000

Urban transportation development requires a balanced relationship between transport system capacity and regional carrying capacity to ensure sustainability. However, existing regulations governing land use planning, road infrastructure, public transport management, transit-oriented development (TOD), and traffic engineering remain fragmented and are not yet systematically integrated into a unified planning framework. This study aims to develop a strategic integration model of five technical regulations to achieve a balanced transportation carrying capacity–environmental capacity system. This research employs a qualitative exploratory comparative method by systematically mapping and analyzing five Indonesian regulatory frameworks: SNI 03-1733-2004, Permen PUPR No. 5/2023, Permenhub No. 96/2015, SK Dirjen Hubdat No. 687/2002, and Permen ATR/BPN No. 16/2017. The analysis identifies eleven key strategic factors influencing integrated transport planning, including population density, infrastructure provision, environmental conditions, accessibility, traffic engineering management, road capacity, land-use slope compatibility, modal classification, and headway standards. The findings reveal regulatory overlap and fragmentation, with no single regulation comprehensively accommodating all strategic factors. Environmental conditions emerge as the least accommodated yet most critical variable influencing system optimization. This study contributes theoretically by proposing a structured regulatory integration model and practically by providing a policy framework for local governments in designing integrated transport systems based on carrying capacity balance principles. The model supports sustainable urban productivity and long-term regional economic resilience.

ZONASI WILAYAH RAWAN BANJIR SUB DAS WAY KANDIS HULU DENGAN PENDEKATAN GEOSPASIAL

Sekar Dwi Rizki, Didik Kuswadi, Muhammad Idrus, Adi Purnomo — Wed, 25 Feb 2026 00:00:00 +0000

The land used in Bandar Lampung City has changed significantly. Bandar Lampung City has experienced flooding issues for the last five years. In order to anticipate and lessen the effects of flood disasters, maps identifying locations that was prone to flooding were created as an early warning system. This study aims to map the degree of flood risk in the Way Kandis Hulu Sub-watershed area and zoning areas according to flood vulnerability. The geospatial method used to create this map includes the division of flood vulnerability class intervals, flood vulnerability level zoning analysis, meteorological thematic maps, flood variables that were scored and weighted, an overlay process, and watershed features that contribute to flooding. The Way Kandis Hulu Sub-watershed's level of flood susceptibility was classified as low, medium, and high based on the analysis, which showed that the value interval for the flood vulnerability class reached 150. According to the analysis, Rajabasa District received the highest score for flood vulnerability, covering an area of 3.2153 km2, or 41.30% of the Way Kandis Hulu Sub-DAS's total area. The high Risc zone has the highest level of flood vulnerability, with an area of 7.7585 km2 (99.66%).

ALTERNATIF TERBAIK ALAT PEMELIHARAAN JALAN BERBASIS LIFE CYCLE COST DI BPJN MALUKU UTARA

Hajar Rajak, Christiono Utomo — Wed, 25 Feb 2026 00:00:00 +0000

Road maintenance is a critical activity conducted periodically, routinely, or upon the occurrence of damage to ensure road conditions remain steady, safe for use, and functional throughout their service life. The National Road Implementation Agency (BPJN) of North Maluku faces significant challenges in selecting alternative road maintenance equipment that satisfies not only technical criteria but also economic efficiency throughout its life cycle. This study utilizes the Life Cycle Cost (LCC) analysis method to evaluate equipment alternatives by identifying all costs incurred over a 10-year period, ranging from initial procurement to disposal. Data collection was conducted through structured interviews and field observations at BPJN North Maluku. The study compares two equipment group scenarios for pothole patching works. Alternative 1 prioritizes the use of a 2-Ton Vibro Roller as the primary compaction tool. In Alternative 2, the equipment group is structured based on the minimum equipment standards according to routine road maintenance guidelines, utilizing a Baby Roller (0.8-Ton capacity) as the primary compactor. The selection of these tools was based on field efficiency considerations. The calculation and analysis results show that Alternative 1 generates an LCC value of Rp 28,053,521,418.34, while Alternative 2 amounts to Rp 28,481,522,517.30. Although Alternative 2 offers a lower initial purchase price, Alternative 1 was selected as the optimal solution because it yields the lowest total LCC, demonstrating superior long-term economic value.

WANPRESTASI DALAM KONTRAK KONSTRUKSI PROYEK PEMERINTAH YANG DIBIAYAI APBN/APBD

Yanti Yanti, Sarwono Hardjomuljadi, Dwi Edi — Wed, 25 Feb 2026 00:00:00 +0000

Construction contract disputes in government projects funded thru the State Revenue and Expenditure Budget (APBN) and the Regional Revenue and Expenditure Budget (APBD) are legal issues that frequently occur and have wide-ranging implications for public interests. One of the dominant forms of disputes is default in the execution of construction contracts, whether committed by the service provider or the service user. This research aims to analyze the characteristics of default in government project construction contracts and to examine the legal considerations of the Supreme Court in Decision Number 171 PK/PDT/2025. This research uses a normative legal research method with an approach based on legislation, conceptual, and case approaches. The scope of this research is limited to the analysis of default in construction contracts for government projects funded by the state budget (APBN/APBD) and the legal considerations of the Supreme Court at the review stage, without discussing the technical aspects of construction or the overall procurement process of goods and services. The research results show that default in government construction contracts has complex characteristics because it lies at the intersection of civil law and public law. The Supreme Court in that ruling consistently applied the principle of legal certainty and the principle of pacta sunt servanda by limiting the scope of the Review process to the aspect of law application. This decision has important implications in strengthening legal certainty and providing guidance for the parties involved in the implementation of construction contracts for government projects funded by the state budget (APBN/APBD).

EVALUATION OF LAND FEASIBILITY FOR CONSTRUCTION OF THE ENTREPRENEURSHIP CENTER LABORATORY BUILDING OF STATE POLYTECHNIC OF LAMPUNG

Vera Chania Putri, Arlina Phelia, Mirnanda Cambodia, Martina Anggi Silova — Wed, 25 Feb 2026 00:00:00 +0000

The construction of the Entrepreneurship Center Laboratory Building at Politeknik Negeri Lampung requires an initial technical assessment to ensure that site conditions adequately support the planned structure. This study aims to evaluate the feasibility of the building development based solely on land conditions, focusing on topography, soil characteristics, and earthwork requirements (cut and fill). The research employed a descriptive–analytical approach using secondary data from the Detail Engineering Design (DED), topographic maps, and Cone Penetration Test (CPT) results, supported by field observations for verification of existing conditions. The results indicate that the site elevation ranges from 144.41 to 146.22 m, with slope gradients between 2.6% and 3.6%, classifying the land as gently sloping and relatively stable for building construction. Geotechnical analysis based on CPT data shows that the soil bearing capacity is sufficient to support a bored pile foundation system. Earthwork analysis reveals a cut volume of 1,339 m³ and a fill volume of 107 m³, resulting in a surplus excavated material of 1,234 m³ that can be technically managed during construction. The overall land feasibility assessment, evaluated using a multi-criteria scoring method, yields a score of 4.30 out of 5.00, indicating that the site is feasible for the proposed building development when assessed from land condition aspects.

Development and Calibration of an LVDT-Based Auxiliary Device for Measuring Rotation in Steel Connections

Y Djoko Setiyarto — Wed, 25 Feb 2026 00:00:00 +0000

Rotation measurement is a key parameter in evaluating the mechanical behavior of steel connections under moment loading. Direct measurement of rotation using conventional sensors such as Linear Variable Differential Transformers (LVDTs) is challenging, as LVDTs are primarily designed to measure translational displacement rather than angular deformation. This study presents the development and calibration of an indirect rotation measurement device based on LVDT displacement conversion using a mechanical wire–roller system. The proposed device converts rotational motion of a horizontal steel member into linear displacement through a steel wire wound around a roller, which is subsequently measured by an LVDT. The calibration was performed within a rotation range of 0°–30° using a 14 mm roller diameter under laboratory-controlled conditions. Calibration was conducted using two approaches: manual rotation measurement with a protractor and controlled loading using a Universal Testing Machine (UTM) equipped with an anglemeter. The results show that calibration performed using UTM loading provides closer agreement with theoretical arc-length calculations, particularly for small rotation angles. The average deviation of the UTM-based calibration relative to theoretical arc-length calculation was ±0.94%, with a maximum deviation of 5.8% at small rotations. The regression model yielded R² = 0.99, indicating excellent linearity. A linear correlation between LVDT displacement and rotation angle was established and adopted as the calibration equation. The proposed measurement system demonstrates adequate accuracy and reliability for experimental investigation of rotational behavior in steel connections.

ANALISIS KELAYAKAN PEMBANGUNAN FLYOVER BERDASARKAN KINERJA LALU LINTAS PADA SIMPANG BERSINYAL KEBON ROEK, KOTA MATARAM

Yesi Nanda Radita, Nusa Sebayang, Sriliani Surbakti — Wed, 25 Feb 2026 00:00:00 +0000

The rapid growth of motorized vehicles in Mataram City, which is projected to exceed 560 thousand units by 2025, has led to increasing traffic congestion, particularly at Kebon Roek signalized intersection, located at junction Saleh Sungkar and Adi Sucipto Road. The existing traffic condition at this intersection indicates a relatively high level of saturation, with the degree of saturation during certain periods approaching or exceeding the critical threshold (DS ? 0.85). Furthermore, based on data from the Regional Infrastructure Development Plan (RPIW) 2022, the traffic performance of each intersection approach remains suboptimal, characterized by Level of Service (LOS) category D on the Adi Sucipto approach, LOS D on the Saleh Sungkar I approach, and LOS E on the Saleh Sungkar II approach. These conditions do not meet the minimum service standards required for primary arterial roads. This study aims to evaluate the feasibility of constructing a flyover as a long-term solution to vertically separate traffic flows and improve intersection capacity. Traffic performance analysis was conducted using the Indonesian Highway Capacity Manual (PKJI) 2023. The results show that under existing conditions, the intersection experiences a maximum delay of 157.9 s/pcu, resulting in an overall Level of Service of F, which reflects very poor traffic conditions. Following the implementation of the flyover, the intersection performance improves significantly, with the Level of Service increasing from LOS F to LOS B. This improvement is consistent with the minimum service standards for primary arterial roads, which require stable traffic flow and relatively smooth vehicle movement.

ANALISIS TINGKAT PELAYANAN SIMPANG TAK BERSINYAL PADA KAWASAN PASAR ORO-ORO DOWO DENGAN PENDEKATAN PKJI 2023 DAN PTV VISSIM

Wed, 25 Feb 2026 00:00:00 +0000

The Oro-Oro Dowo Market area in Malang City faces severe traffic congestion due to vehicle volumes exceeding road capacity and high side friction, with the Degree of Saturation (DS) on Brigjen Slamet Riyadi Street reaching over 0.8. In response, the Malang City Government implemented a One-Way System (SSA) to reduce the volume-to-capacity ratio and support the Car Free Day (CFD) program. However, this policy has led to a 30% decrease in market visitors due to inefficient detours and increased travel time. Analysis of four key intersections—Guntur, B.S. Riyadi, Buring, and Merbabu—identifies the B.S. Riyadi intersection as the critical congestion point. Results using the PKJI 2023 method show that during the afternoon peak hour, this intersection experiences its highest delay, exceeding 200 seconds/pcu, indicating a Level of Service (LOS) of F (saturated flow). These findings are validated by PTV Vissim microsimulation modeling, which shows delays over 100 seconds and an LOS of F. This significant difference occurs because PKJI 2023 uses static calculations based on an average empirical formula, while PTV Vissim uses microscopic simulations that dynamically model interactions between vehicles.

SPATIO-TEMPORAL ANALYSIS OF LAND COVER CHANGE (1990–2021) AND ITS IMPLICATIONS ON HYDROLOGICAL RISK IN THE CENTRAL CILIWUNG WATERSHED (DEPOK–SOUTH JAKARTA)

Belicka Yan Oktaria, Atie Tri Juniati, I Nyoman Teguh Prasidha — Wed, 25 Feb 2026 00:00:00 +0000

The Central Ciliwung Watershed represents a strategic hydrological transition zone between upstream and downstream Jakarta that has experienced rapid urban transformation over the past three decades. This study analyzes spatio-temporal land cover change from 1990 to 2021 and evaluates its implications for hydrological risk. Multi-temporal Landsat Collection 2 Level-2 imagery (30 m spatial resolution) for 1990, 2000, and 2011 and Sentinel-2 Level-2A imagery (10 m spatial resolution) for 2021 were processed. Sentinel-2 imagery was resampled to 30 m to ensure spatial consistency. Atmospheric correction and cloud masking were applied using QA bands and Scene Classification Layer (SCL). Supervised classification with the Random Forest algorithm produced an overall accuracy of 87.6% and a Kappa coefficient of 0.84. Built-up land expanded from 8,240.24 ha (23.9%) in 1990 to 29,258.90 ha (86.3%) in 2021, while agricultural and vegetated areas declined substantially. Increasing impervious surfaces reduce infiltration capacity and elevate runoff coefficients, potentially intensifying peak discharge. These findings highlight the importance of integrated watershed-scale planning and infiltration-based urban drainage strategies.

LAND USE CHANGE, WATERSHED DEGRADATION, AND THE ROLE OF NATURE-BASED SOLUTIONS IN FLOOD RISK REDUCTION IN THE CIMANDIRI WATERSHED, WEST JAVA, INDONESIA

Sandy Lesmana, Atie Trijuniati, I Nyoman Teguh Prasidha — Wed, 25 Feb 2026 00:00:00 +0000

Flood occurrence in tropical watershed systems is increasingly linked to structural landscape transformation and declining ecological regulation capacity. In the Cimandiri Watershed of West Java, rapid land conversion over the past three decades has altered hydrological processes and intensified downstream vulnerability. This research investigates long-term land use transitions (1990–2024), evaluates watershed degradation using weighted biophysical indicators, and identifies strategic zones for ecosystem-based flood mitigation. Spatial analysis integrating land use, slope gradient, and critical land status reveals that 42.44% of the watershed area is categorized as moderately to highly degraded. Built-up land expanded almost fourfold during the study period, while forest cover declined substantially, indicating a shift from infiltration-dominated to runoff-dominated hydrological behavior. Areas with elevated degradation levels spatially correspond to zones of recurrent flood exposure in downstream and coastal sectors.

The study proposes targeted implementation of Nature-Based Solutions (NbS), including upstream reforestation, riparian buffer restoration, and downstream retention enhancement, as a complementary strategy to conventional infrastructure. The findings emphasize that flood risk in Cimandiri is a systemic watershed issue shaped by cumulative upstream–downstream interactions rather than isolated local factors

KAJIAN LITERATUR KOMPARATIF EFEKTIVITAS INHIBITOR HIJAU BERBASIS EKSTRAK TANAMAN DALAM PENGENDALIAN KOROSI BAJA KARBON

Endah Murtiana Sari, Rahmat Rahmat, Rifo Nur Laksana, Probokusumo Probokusumo — Wed, 25 Feb 2026 00:00:00 +0000

Corrosion is a metal degradation process caused by chemical or electrochemical reactions between metals and their surrounding environment. This phenomenon leads to significant technical, economic, and environmental losses in various industrial sectors. The use of synthetic corrosion inhibitors that may cause environmental hazards has encouraged the development of environmentally friendly corrosion inhibitors known as green inhibitors derived from natural materials. This study aims to analyze the effectiveness of plant-based extracts as corrosion inhibitors for steel through a comparative literature review approach. The research was conducted using a systematic literature review by analyzing 30 scientific articles published between 2015 and 2024 obtained from databases such as Scopus, ScienceDirect, and Google Scholar. The analysis focused on several parameters including types of natural materials, active compounds, adsorption mechanisms, inhibition efficiency, and optimum concentration. The results show that mangosteen peel (Garcinia mangostana), papaya peel (Carica papaya), and banana peel (Musa paradisiaca) have significant potential as green corrosion inhibitors with inhibition efficiencies reaching 93–95%, 78–83%, and 65–72% respectively. Active compounds such as tannins, flavonoids, pectin, and alkaloids contribute to the formation of a protective adsorption layer on the steel surface that reduces corrosion rate. These findings indicate that natural materials have strong potential as environmentally friendly and sustainable corrosion inhibitors for future industrial applications.

PENGARUH SISTEM DILATASI TERHADAP KINERJA SEISMIK GEDUNG RUMAH SAKIT 7 LANTAI BERDENAH U

Syapril Janizar, Muhammad Fauzan Ardillah — Wed, 25 Feb 2026 00:00:00 +0000

Berikut ini adalah revisi abstrak dalam bahasa Inggris yang telah disesuaikan dengan isi dokumen Anda, termasuk metode elemen hingga, penggunaan perangkat lunak analisis struktural, serta standar SNI 1726:2019 dan SNI 2847:2019. ABSTRAK Peningkatan permintaan akan fasilitas kesehatan di daerah perkotaan telah mendorong pembangunan gedung rumah sakit bertingkat dengan konfigurasi lantai yang kompleks dan tidak teratur, seperti tata letak berbentuk U. Ketidakteraturan semacam ini dapat menyebabkan respons gempa yang tidak menguntungkan akibat distribusi massa dan kekakuan yang tidak merata, yang dapat menimbulkan efek torsi dan konsentrasi tegangan selama peristiwa gempa. Studi ini bertujuan untuk menganalisis pengaruh sistem sambungan ekspansi terhadap kinerja gempa bangunan rumah sakit bertingkat tujuh berbentuk U. Penelitian ini menggunakan pendekatan kuantitatif melalui simulasi numerik berdasarkan pemodelan struktural tiga dimensi menggunakan perangkat lunak berbasis elemen hingga. Analisis gempa dilakukan menggunakan metode beban lateral statis setara sesuai dengan SNI 1726:2019 untuk ketahanan gempa dan SNI 2847:2019 untuk persyaratan beton struktural. Dua model struktural dibandingkan: model monolitik tanpa sambungan ekspansi dan model yang memasukkan sambungan ekspansi yang ditempatkan secara strategis antara massa bangunan. Parameter yang dievaluasi meliputi perpindahan lateral, pergeseran antar lantai, distribusi gaya internal, dan stabilitas struktural global. Hasil analisis menunjukkan bahwa implementasi.

PERENCANAAN INFRASTRUKTUR JALAN DAN DRAINASE KAWASAN PERUMAHAN CLUSTER JATI PADANG, JAKARTA SELATAN

An An Anisarida, Febrian Febrian, Muhammad Rizky Pratama Janizar — Wed, 25 Feb 2026 00:00:00 +0000

The development of residential areas in urban regions requires reliable basic infrastructure, particularly neighborhood roads and drainage systems. Poorly planned infrastructure can lead to waterlogging, deterioration of road quality, and reduced comfort and safety for residents. However, previous studies generally address drainage systems and pavement design separately, indicating that integrated infrastructure planning approaches remain limited. This study aims to develop an integrated infrastructure planning for the Jati Padang residential cluster in South Jakarta, including land grading, drainage system design, and pavement planning using paving blocks. The methods employed include hydrological analysis based on rainfall data from the BMKG Halim Perdana Kusuma Station (2009–2018), flood discharge estimation using the Rational Method and Synthetic Unit Hydrograph (HSS) ITB-1, and pavement design based on subgrade CBR values obtained from DCP testing. The novelty of this study lies in the integrated planning approach that combines land grading, hydrological and hydraulic analysis, and pavement design within a single framework based on actual field conditions. The results indicate that the 10-year return period rainfall is 160.67 mm, with a peak discharge of 0.205 m³/s. The designed u-ditch drainage channel (width 0.4 m; height 0.6 m) is capable of accommodating the design discharge, while the paving block pavement is designed based on a CBR value of 5.27%. This planning approach is expected to serve as a reference for developing safe, efficient, and sustainable residential infrastructure.

A SYSTEMATIC LITERATURE REVIEW OF GREEN BUILDING IMPLEMENTATION FOR IMPROVING ENERGY EFFICIENCY AND ENVIRONMENTAL SUSTAINABILITY

Meisy Ariani, Septya Salsalbilla, M. Heri Zulfikar — Wed, 25 Feb 2026 00:00:00 +0000

The application of green building concepts is not only intended to minimize carbon emissions but also to enhance the well being and comfort of building occupants through healthier spatial designs. Although this approach offers multiple advantages, its adoption still encounters several challenges most notably, the substantial initial investment costs and the absence of comprehensive regulatory frameworks, particularly in developing nations. This study aims to evaluate how effectively the sustainable building concept contributes to improving energy performance, conserving natural resources, and mitigating negative environmental impacts. A qualitative descriptive method was employed, using a literature study approach. The research encompassed a population of scientific works discussing the implementation of green buildings both within Indonesia and internationally. Samples were selected purposively, focusing on relevance and the recency of the materials. Data were gathered from various secondary sources such as academic journals, textbooks, and institutional reports, and analyzed through thematic synthesis and interpretative techniques to uncover implementation trends, barriers, and sustainability strategies. The findings reveal that applying green building principles can increase energy efficiency by approximately 20–30%, optimize the use of eco friendly materials, and foster a healthier, more comfortable built environment.

RANCANGAN SISTEM PEMANTAUAN STRUKTUR TERINTEGRASI BERBASIS SENSOR PADA TAHAP KONSTRUKSI GEDUNG BERTINGKAT

Arnold Santoso, Yongki Alexander Tanne — Wed, 25 Feb 2026 00:00:00 +0000

The construction of high-rise buildings involves a high level of structural risk, particularly during the construction phase when structural elements have not yet reached their design capacity and are still subjected to significant temporary loads. Current supervision practices that rely primarily on visual inspections and conventional methods are considered insufficient for detecting changes in structural behavior in an early and objective manner. This study aims to design an integrated structural monitoring system capable of connecting various types of sensors and generating real-time data to support continuous monitoring and an early warning mechanism. The research method employed is a systematic literature review of recent studies related to structural health monitoring, sensor technologies, and Internet of Things (IoT)-based systems. Based on the review results, an integrated monitoring system architecture, system workflow, and sensor placement strategy for major structural elements and critical areas of the building are developed. The results indicate that the proposed IoT-based system is able to comprehensively represent structural behavior, support early detection of potential risks or initial indications of structural failure, and serve as an initial reference for the development of more reliable and applicable structural monitoring systems.

Keywords: structural monitoring, integrated sensors, IoT, high-rise buildings, construction