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INDONESIA
Inersia : Jurnal Teknik Sipil dan Arsitektur
Published by Universitas Negeri Yogyakarta
ISSN : 0216762X     EISSN : 2528388X     DOI : -
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
INERSIA is stand for INformasi dan Ekspose hasil Riset Teknik SIpil dan Arsitektur. This scientific journal is managed by the Department of Civil Engineering and Planning Education, Faculty of Engineering, Yogyakarta State University, in cooperation with the Persatuan Insinyur Indonesia (PII). It publishes and disseminates research results from lecturers and post graduate students from various universities in Indonesia, which has contributed to the development of science and technology, especially in the field of Civil Engineering and Architecture. INERSIA is published twice a year, in May and December.
Arjuna Subject : -
Articles 14 Documents
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Search results for , issue "Vol. 21 No. 1 (2025): May" : 14 Documents clear
Improving the Integration of Intermodal Transportation Services in the Poris Plawad Area in Tangerang City Yusuf, Ferdinan; Priyanto, Sigit; Mulyono, Agus Taufik
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.64151

Abstract

The integration of intermodal transportation services is a strategic necessity for improving the quality of urban transportation services. To realize the integration of services, it should be focused on the main transportation nodes in an area, such as Poris Plawad Terminal and Batu Ceper Station in the Poris Plawad Area, Tangerang City. This study aims to evaluate and determine strategies for improving the integration of intermodal transportation services in the Poris Plawad Area. The results of this study are expected to provide consideration for stakeholders to encourage the use of public transportation and realize the successful development of the Poris Plawad Area in the future. The sampling technique used was purposive sampling, with a total sample size of 202 respondents. Respondent data collection was carried out by distributing questionnaires to users of transportation services at Poris Plawad Terminal and Batu Ceper Station, as well as residents who are active within a radius of 800 meters from the terminal and station. This research uses the Importance Performance Analysis (IPA) and Theory of Inventive Problem Solving (TRIZ) methods. The results of the IPA analysis show that there are five service variables that are considered important but low-performing, so they need to be prioritized for improvement, including the provision of pedestrian crossing facilities, the provision of proper sidewalks, disturbance-free pavement quality, and access into and out of the node that is free from traffic conflicts. Recommended solutions based on TRIZ principles include building a sky bridge and closing the south entrance for access into and out of the station; building a sidewalk connected to the node that is built higher than the road surface and uses high-quality materials; placing sidewalk bollards; and permanently closing the station access point that passes through the railway level crossing. These improvements are expected to enhance accessibility, safety, and walkability, encouraging greater public transport use and aligning with the area’s Transit Oriented Development goals.
Impact Analysis of Condongcatur Underpass Development Plan with Macro Traffic Simulation PTV VISUM on Road Network Performance Yusup, Muhamad; Munawar, Ahmad; Irawan, Muhammad Zhudy
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.64292

Abstract

It is planned to build an Underpass for the Condongcatur intersection to improve traffic performance and overcome the congestion that occurs. The purpose of this research is to analyze the existing traffic performance around the Condongcatur Underpass construction area, predict the impact caused, and formulate efforts to handle traffic impacts and analyze how effective the construction of the Condongcatur Underpass is in overcoming congestion that occurs. This research uses a transportation model approach to analyze the road network using PTV VISUM software. The results of the research on existing conditions show the performance of the affected road network with a v/c ratio value between 0.21 - 1, 23 (Level of service B - F). At the time of construction there were 12 road sections most affected by the Condongcatur Underpass construction plan, where the road section with the highest percentage increase occurred on the Padjajaran road section by 167% which was originally in service category C to F. In operational conditions, the Padjajaran Road section with the Underpass is in the B and C service level categories. The performance results on the affected road network provide better results with the Underpass compared to the existing conditions.
Mode Choice and Spatial Distribution of Coal Transport in Jambi, Indonesia Nugroho, Nurman; Priyanto, Sigit; Triatmodjo, Bambang
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.64336

Abstract

Coal is an important commodity for Jambi Province. Based on data from the Central Bureau of Statistics, in the first quarter of 2022, the value of coal exports reached 10.75% of the total export value. Apart from being exported, coal commodity is also used for domestic purposes. The transport used at this time is only through public roads. The use of these routes results in many problems such as traffic accidents, congestion, and social conflicts. Therefore, the number of vehicles allowed to pass on public roads is limited. This has resulted in the production target plan not being achieved, only 17.3 million tonnes out of 40 million tonnes in 2022. Hence the need for other routes for transport such as rivers, special roads, and railways. This research is intended to analyse coal transport trips using trucks, barges and railways. This research discusses the closest route, mode selection, and transport costs based on the distance travelled and the travel time of each mode. The search for the closest travel route is done by spatial analysis with Network Analyst on ArcGIS. Mode choice was analysed using the multinomial logit method. Meanwhile, transport costs are calculated based on the principle of generalised cost. Modelling results on the selection of mode, during the rainy season the most efficient mode is barging with a selected probability of 44%, while rail 28% and transport by truck 27%. During the dry season, the probability of transport by railway is 93%, barge 4% and truck 3%. The results indicate that the most efficient mode during the rainy season is barging and during the dry season transport by railway.
Effectiveness of Concrete Crack Repair Using Bacillus subtilis and Calcium Lactate Rahmawan, Rama Zaky; Erizal, Erizal; Putra, Heriansyah; Oktafiani, Pradyta Galuh; Sutoyo, Sutoyo
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.71313

Abstract

Cracks facilitate aggressive substances entering the steel easily and cause corrosion of the reinforcement. There are several innovative methods for dealing with cracks in concrete, one of which is using bacteria. The purpose of using bacteria and CaL is to find out the role and effectiveness of repairing cracks in concrete. In outline, several methods and tests are carried out, including bacterial culture, test tube, concrete sample making, concrete curing, compressive strength testing, permeability testing, absorption testing, image processing testing, and microscopic testing. The test tube results showed that the highest mass of calcite was found in a solution of 2 ml of bacteria and CaL with a concentration of 65.4 g/L. The cracks appeared closed visually at 28 days of age. Through imageJ software, the crack repair rate in concrete reaches 95.94%. The effect of adding B. subtilis and CaL was proven to be able to close concrete cracks and increase the compressive strength of cracked concrete by 13.16%, reduce permeability by 53.12%, and absorption by 22.20%. This was confirmed by SEM testing and VHX-7000 observations which showed the presence of calcite crystals in the concrete pores and filled the concrete crack areas. This study elucidated that using bacillus subtilis bacteria and calcium Lactate in self-healing concrete is an effective technique to repair the concrete crack.
Spatial Characteristics of Permanent Relocation Housing in Disaster-Prone Areas of Cangkringan Naufal, Muhamad Rafif; Nareswari, Ardhya
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.72739

Abstract

The Merapi relocation permanent residential settlements (huntap) are spread across 2 sub-districts, Cangkringan and Minggir. The relocation located in Disaster Prone Area (KRB) 2, an area with a high level of vulnerability. The settlements are in rural areas contoured by mountain slopes. This study aims to describe and identify the condition of the spatial character of huntap settlements from an accessibility perspective. Aspects that influence regional emergencies in the mitigation stage are the complexity of shelters, shelter buildings, land morphology, settlement accessibility and preservation facilities. This research was carried out qualitatively deductively with 18 objects of observation in the Merapi relocation huntap settlements. Data were collected from contour data (GIS-Google Earth), primary & secondary literature studies, observations and interviews. This classification is then analyzed based on physical characteristics in the form of buildings, land and preservation facilities. The character of the building  will influence the shape of the road pattern and the level of visibility. The morphological characteristics of the land  will influence the ease of mobility based on the shape of the road and human movement. The nature of preservation facilities will affect the level of wayfinding which residents can recognise their environment.. So to support the optimization of the success of the evacuation process, the main road is in a position parallel to the contour line, minimizing the potential for density accumulation. There is an open area between the grid so that the level of visibility is wider. Minimizing the number of intersections in areas that are segregated/separated from other areas. Adding access gates to the entrance and exit to prevent bottlenecks, accumulation in the gate area.. It is hoped that this study can be used as a reference, recommendation and basis for the government, architects, urban designers or planners in designing relocation shelters at other points.
Earthquake Hazard Analysis of National Vital Objects by Probabilistic Seismic Hazard Analysis Method in West Java Prayogo, Arif Zidan; Rorosanto, Zahrawani Ifada; Syahbana, Arifan Jaya; Maulita, Ika
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.72915

Abstract

The Probabilistic Seismic Hazard Analysis (PSHA) method was used to analyze the level of earthquake hazard in West Java Province, Indonesia, which is located between two active tectonic plates. This research integrates literature study, earthquake data collection, and data processing to explore the influence of megathrust, background, fault, and combine earthquake sources on local and national vital objects in the region, such as Pusdik Kopassus, Presidential Palace, Cirebon PLTU, Geothermal Power Plant, Peacekeeping Mission Center (PMPP TNI), PT. PINDAD, PT DAHANA SUBANG, PLM GUNUNG SAWAL, Walahar Dam, PT Indonesia Power UJP Jabar 2 Pelabuhan Ratu, which have important roles in critical infrastructure, defense, and national resilience. The analysis shows variations in maximum ground acceleration between 0.40 g to 1.00 g for background earthquake sources, and 0.00 g to 1.00 g for fault earthquake sources. The research also underscores the importance of mitigation efforts and proper planning to reduce the potential impact of earthquakes in West Java, taking into account the crucial role of national vital objects in maintaining the stability and sustainability of the region. The implications of these findings reinforce the urgency to improve coordination between stakeholders in building earthquake resilience at the local and national levels, and highlight the importance of hazard curve analysis on national vital objects to inform the future of the region.
Millennial Generation Preferences for Subsidy House Selection in Kendal Regency Naufal, Muhammad Fadhiil Hardian; Sarwadi, Ahmad
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.73443

Abstract

Housing is a fundamental human need providing shelter, security, and comfort. Preferences in housing vary among consumers, particularly across different generations. This study aims to identify millennial preferences in subsidized housing and the factors influencing these preferences in Kendal Regency. Quantitative research methodology was employed, utilizing exploratory secondary data collection. Variables included design, housing type, location, geography, and costs. Data collection involved both secondary and primary sources, with questionnaires distributed to 120 millennial beneficiaries of subsidized housing loans in Kendal Regency. Data analysis encompassed univariate and bivariate analysis. Chi Square test showing significant associations were found between income, occupation, age, and geographic location with housing preferences, highlighting the importance of economic and demographic factors in shaping housing decisions. Education, however, did not show a significant impact on these preferences. These findings underscore the need for targeted policies and marketing strategies to meet the diverse housing preferences of millennials in subsidized housing contexts.
Experimental and Numerical Study on the Comparative Flexural Behavior of Geopolymer Concrete Beams Based on Metakaolin and Fly Ash Purba, Luki Hariando; Hutagalung, Bartholomeus; Perangin-angin, Siwan
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.78027

Abstract

This study investigates the flexural behavior of normal concrete (BN), fly ash-based geopolymer concrete (BGPF), and metakaolin-based geopolymer concrete (BGPM) through both experimental testing and Finite Element Method (FEM) analysis. The objective is to compare the mechanical properties, load-bearing capacities, and post-yield behavior of these materials. The experimental results indicate that normal concrete beams (BN) exhibited the highest performance in terms of cracking load, yield load, and maximum load, demonstrating both high strength and ductility. The fly ash-based geopolymer concrete (BGPF) showed lower strength than BN but still performed significantly better than the metakaolin-based geopolymer concrete (BGPM). BGPF displayed a more brittle behavior post-yield, with a sharp reduction in load-bearing capacity, making it less suitable for structures requiring significant post-yield deformation. The BGPM beams demonstrated the lowest mechanical performance, primarily due to insufficient curing. The metakaolin material was only heated to 200°C due to laboratory limitations, far below the optimal temperature of 700-800°C necessary for full geopolymerization. As a result, the BGPM beams remained brittle and exhibited minimal load-bearing capacity compared to BN and BGPF. FEM analysis, while providing useful insights into the flexural trends, tended to overestimate the load-bearing capacities and deflections across all beam types compared to experimental results. In conclusion, geopolymer concrete, particularly fly ash-based, shows promise as an alternative to traditional concrete, though its mechanical properties, especially ductility and post-yield behavior, require further optimization. The study highlights the importance of proper curing processes, especially for metakaolin-based geopolymer concrete, to fully realize its potential as a sustainable building material. Future research should focus on refining these processes to enhance the strength and flexibility of geopolymer concrete.
The Behavior of Reinforced Concrete Beams with Various Carbon Fiber Retrofitting Methods in Enhancing Stiffness Zai, Eben Oktavianus; Purba, Luki Hariando
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.78313

Abstract

This study investigates the effectiveness of Carbon Fiber Reinforced Polymer (CFRP) sheets and rods in improving the structural performance of reinforced concrete beams. Three beam specimens were tested: a control beam (BN), a beam reinforced with CFRP rods (BTC), and a beam reinforced with CFRP sheets (BLC). The experimental evaluation focused on key parameters, including first crack load (Pcrack), yield load (Pyield), maximum load (Pmax), and deflections at critical points. The stiffness of the beams was assessed at both the cracking stage (Kcrack) and the yielding stage (Kyield). The results demonstrate that the beam reinforced with CFRP sheets (BLC) exhibited the highest improvements in stiffness, with an increase of 184.89% in Kcrack and 221.21% in Kyield compared to the control beam (BN). The CFRP rod-reinforced beam (BTC) also showed enhanced performance, but to a lesser extent, with increases of 72.69% in Kcrack and 64.78% in Kyield compared to BN. The data reveals that BLC significantly reduces deflection and enhances load-bearing capacity, particularly in resisting initial cracking and yielding. The discussion highlights that CFRP sheets provide superior stiffness improvement compared to CFRP rods, making them more suitable for applications where increased stiffness and reduced deflection are critical. While CFRP rods effectively increase the ultimate load capacity, their impact on stiffness is less pronounced than CFRP sheets. In conclusion, CFRP sheets offer a more effective reinforcement solution for enhancing stiffness and controlling deflection in concrete beams, especially in structures requiring high resistance to cracking and yielding.
Structural Performance Optimization of Multi-Story Steel Frames with Split-K EBF Bracing System Configuration Kusuma, Kadek Adyatma Teja; Nindyawati, Nindyawati; Sulaksitaningrum, Roro; Muhammad, Dzul Fikri
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 21 No. 1 (2025): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v21i1.78431

Abstract

Conventional steel frame structures tend to be susceptible to earthquakes, which can lead to significant economic and social losses. The earthquake disaster has motivated various technological exploration efforts to improve the seismic resilience of building structures. To strengthen the structure and prevent collapse, reducing the span length by adding bracing to the weak axis of the column proved effective. The addition of lateral stiffeners (bracing) to the elements of the frame structure is crucial in reducing lateral forces due to earthquakes in high-rise buildings. However, the researchers only focused on comparing the types of bracing used. Therefore, the purpose of this study is to optimize the structure of the steel frame multi-story building by innovating the configuration of bracing placement to match the composition of the building. To produce optimal results, the steel frame building model using bracing is varied in the placement of bracing with the middle model (BC1), the edge model (BC2), and the even model (BC3), so that the three models produce the effect of bracing placement on the building. The three building models will be analyzed using SAP200 to produce the performance of the steel frame building structure, including displacement, natural vibration periods, and base shear forces. From the overall analysis of the three models, it is shown that the evenness model (BC3) produces the most optimal structural performance. This is also shown by the fulfillment of all structural performance requirements based on the requirements of earthquake-resistant structures in SNI 1726-2019. The result of the buffer evenly provides a large displacement that occurs on the 3rd floor in the X direction which compared to other models has the smallest value, which is 20.13 mm. Based on the results of the analysis, it is known that the uniform model has the smallest natural vibration period value of 0.779 seconds in the X direction and has the largest dynamic shear force value in the X direction, which is 4823.74 kN. Therefore, it can be concluded that there is an effect of the placement of supports in steel frame multi-story buildings on the ability of the building structure with the even placement model (BC3) to produce the most optimal building design when compared to other building models.

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