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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. 20 No. 1 (2024): May" : 14 Documents clear
A Comparative Study of Static and Dynamic Elastic Modulus Using the Stress Wave Velocity Method in Bamboo Junaid, Annisa
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.68838

Abstract

The current grading process of bamboo still relies on visual or conventional observations. Bamboo is a non-prismatic material, so it is challenging to determine its strength accurately without laboratory testing. One crucial parameter for predicting bamboo strength is the modulus of elasticity (MoE). This study focused on 12 stems of Petung Bamboo (Dendrocalamus asper), 12 stems of Wulung Bamboo (Gigantochloa atroviolacea), and 12 stems of Apus Bamboo (Giganthochloa apus) randomly selected from a bamboo store. Before testing, bamboo stalks must be visually inspected to observe bamboo details and ensure there are no defects or damages. In calculating the volume of bamboo (V) have two methods, One, predicted volume, denoted as VP, involves calculating the volume by only measuring the cross-sectional area of the bamboo's tip and the cross-sectional area of the base, which is then multiplied by the bamboo's length (L). Two, detailed Volume, symbolized as VD, refers to the meticulous calculation of bamboo volume. Testing was conducted using the stress wave velocity method to obtain dynamic modulus of elasticity values (MOEd). Bamboo flexural testing (destructive) was performed to obtain static modulus of elasticity (MOEs) and bending strength (MOR) values for bamboo. Regression modelling of the relationship between MOEs and MOEd (using predicted volume) for bamboo, regardless of species, showed a relatively low coefficient of determination, i.e., 0.488. This implies that the longer the bamboo was tested, the lower the precision of its volume. Testing using detailed volume calculations for dynamic modulus of elasticity resulted in a relatively high coefficient of determination, precisely 0.8406.
Transmission Pipeline Planning from Kregan Water Treatment Plant to Watu Gadjah Tank by PERUMDA PDAM Sleman Using EPANET 2.2 Dewata, Hendra; Faishal, Faris Amir; Marleni, Ni Nyoman Nepi
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.71953

Abstract

Clean water is vital as it directly impacts health and influences various aspects of life, including social, economic, and cultural activities. To address the clean water supply requirements in the area, PERUMDA PDAM Sleman, Yogyakarta, is currently planning for a transmission network linking the Kregan WTP to the Watu Gadjah Tank. The pipeline planning is carried out to ensure efficient and optimal network performance. The pipeline planning use both primary and secondary data. The primary data was obtained from surveys, while the secondary data was obtained though previous research and planning, regulation, and from the other sources. The pipeline network analysis carried out using EPANET 2.2. software. EPTANET was selected because of its cost-effectiveness and robust capabilities in modeling drinking water networks, with the advantage of being re-programmable. The results of the analysis are then adjusted to the planning standards that applicable in Indonesia. Risk analysis was carried out based on experience and expert opinion. The results of the planning showed that the maximum pressure on the transmission network was 84.21m on Pendowo Road. The velocity between 1.03 m/s and 1.63 m/ss with the highest headloss was 10.33 m/km. Based on the results of the planning, the entire parameter meets the standard of the applicable planning criteria. The results of the analysis indicate that the technical specifications of the pipe used must be able to withstand a pressure of 92,63m. There was a potential risk that network performance may be disrupted both in terms of network performance, implementation of development, and operational stages. The re-examination and the development of operational standard procedures is needed to ensure that planning has been in line with the expectations, can be implemented, and can be operated efficiently.
Effects of Gravel Percentage to Compaction Density and Stability of Embankment Sukmawati, Eka; Solin, Dian Purnamawati; Farichah, Himatul
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.65825

Abstract

Embankments are frequently used in the construction of road, railway, airport, dams and other types infrastructure. Soil compaction is a crucial part of the construction process of embankment. Thus, soil compaction needs to be conducted and investigated in such a way so embankment will not experience large settlement that could lead to collapse. Generally, soil compaction density testing is performed using the sand cone method according to ASTM D-1556. The material used in this test is not carefully considered, which may lead to inaccurate results. In this study, the sand cone correction test according to ASTM D-4718 which consider the percentage of gravel is established to identify the compaction density of embankment and the effect to its stability. 16 secondary data of compaction density have been collected from the construction of embankment. According to the data, the compaction density of the embankment has met the specifications. The relationship between the gravel percentage and the compaction density is obtained. With a determination coefficient (R2) value of 0.805, it can be understood that these two variables have a highly significant correlation. Furthermore, to understand the relationship between the compaction density and the stability of the embankment, a slope stability analysis was conducted on the embankment using the Fellenius method. The result shows that when the compaction density of the embankment meet the specifications, embankment is stable with the safety factor (SF) of 1.511. Furthermore, both variables have a very strong relationship. The safety factor of the embankment is increased as the compaction density increases.
The Shift of the Slow Tourism Concept During the Period of the Covid-19 Pandemic at Yabbiekayu Eco-Bungalows Putri, Angela Savina; Widyastuti, Dyah Titisari
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.72442

Abstract

Even though it was affected by the Covid 19 pandemic, tourism actors are trying to persist in improving and developing the quality of tourist travel. One way that tourism actors do this is by making changes to the implementation, namely the concept of slow tourism in a tourist trip. The slow tourism concept is a tourism concept that focuses on improving the quality of travel by considering the ecological conditions of the environment, reducing emissions, and the welfare of the surrounding community, so as to create an authentic and unforgettable tourist trip. The study of the concept of slow tourism will not work without complete tourism components consisting of attractions, amenities, accessibility, accommodation and tourist activities. This research will discuss the concept of slow tourism in the tourism component which is the basis for changes in the application of the concept of slow tourism in the period before, during and after the Covid 19 pandemic at Yabbiekayu Eco Bungalows and the Timbulharjo Village area. This research discusses the extent of changes in the application of the slow tourism concept to tourist trips as well as the factors that influence changes to a tourist trip in the period before, during and after the Covid 19 pandemic at Yabbiekayu Eco Bungalows. The method used is descriptive qualitative, by collecting interview and observation data. The results of the research carried out will show the extent of changes in the concept of slow tourism in the period before, during and after the Covid 19 pandemic in Timbulharjo Village with the case study of Yabbiekayu Eco Bungalows. These changes will be identified in accordance with the research time period that has been determined, then a conclusion will be made regarding how dynamic and consistent the changes in the slow tourism concept that occurred during the period before, during and after the Covid 19 pandemic at the research locus, namely at Yabbiekayu Eco Bungalows and in the village Timbulharjo, Bantul, Yogyakarta.
Analysis of Service Performance for Intermodal Facilities in The Area of Asrama Haji and Bumi Sriwijaya Stations Haris, Willi; Malkhamah, Siti; Suparma, Latif Budi
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.64153

Abstract

The integrated intermodal service system between the South Sumatra Light Rail Transit (LRT) and road-based transportation modes such as the Palembang Bus Rapid Transit (BRT) and Angkot Feeder Musi Emas still has shortcomings, particularly in the areas of the Asrama Haji and Bumi Sriwijaya Station. This research is conducted to observe the conditions of the physical facilities, payment integration, and schedules at both stations, as well as to examine the regulations in meeting the standards of ideal pedestrian physical facilities, which are then compared with passenger perceptions. This research utilizes the methods of crosstabulation analysis and Importance Performance Analysis (IPA). Crosstabulation analysis is used to determine the relationship between respondents' sociodemographic and their travel characteristics. Importance Performance Analysis (IPA) is used to assess passenger perceptions of the performance quality of intermodal facilities. Based on the research finding, according to passengers perceptions of 49 service attributes, there are 20 attributes that have a high level of importance but low performance, indicating the existence of three service provision needs that need to be prioritized for improvement. First, the provision of adequate and disability-friendly sidewalk facilities. Second, the provision of pedestrian crossing facilities. Third, the access to and from the node that is free from traffic conflicts. The recommended solutions include the construction of sidewalks connected to the node points, built higher than the road surface, installation of guiding block, barrier posts, and ramps at each end of the sidewalk, construction of an overpass (JPO) at the Asrama Haji Station and a pelican cross at the Bumi Sriwijaya Station, and the regulation of transit areas to prevent vehicles from parking and waiting at the entrance and exit points of the node.
Bridge Assessment Analysis using Sufficiency Rating Method (Case Study of The Mungkung Overpass) Lau, Debora; Aminullah, Akhmad; Triwiyono, Andreas
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.71348

Abstract

Bridges play a crucial role in connecting various routes and water bodies, necessitating regular monitoring to prevent potential hazards and losses due to deterioration. In Indonesia employs the Bridge Management System (BMS) for decision-making regarding maintenance, repair, and replacement activities, its reliance on a limited set of criteria may lead to uncertainties in bridge condition assessmsents. This study explores the Sufficiency Rating (SR) method as an alternative for assessing bridge feasibility. By considering multiple factors, including structural adequacy, serviceability, functionality, and public interest, the SR method offers a comprehensive approach to bridge evaluation. An analysis of the Mungkung Overpass on the Ngawi Kertasono toll road was conducted to evaluate the effectiveness of the SR method. The findings classified the bridge as excellent, indicating no immediate need for treatment. However, the SR method has limitations, particularly in visually assessing damage to superstructure and substructure elements, which may introduce subjectivity. Overall, this research contributes to the ongoing development of bridge assessment methodologies in Indonesia, aiming to enhance decision-making processes and ensure the safety and longevity of bridge infrastructure. After analyzing the data obtained through the implementation of the SR method, it was revealed that S1 achieved a value of 45%, S2 achieved 23%, S3 achieved 12.7%, and S4 achieved 6%. The total actual value of the four parameters calculated based on the SR method was 74.7%, with a difference of 25.3% from the maximum value. These findings clearly illustrated that the bridge satisfied the criteria for deficiency, thereby necessitating comprehensive rehabilitation measures to be undertaken.
Spatio-Temporal Analysis of Vegetation Index Change on Land Surface Temperature in Yogyakarta Special Region Using MODIS Imagery (2000-2023) Nugroho, Rheza Tri
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.72179

Abstract

Yogyakarta has become a province renowned for its abundance of tourist destinations and learning opportunities for students from all over Indonesia. Temperature and vegetation density are key factors contributing to comfort in both academic pursuits and recreational activities. This study utilizes NDVI (Normalized Difference Vegetation Index) and LST (Land Surface Temperature) to determine these crucial parameters. MODIS imagery serves as a vital data source for analyzing NDVI and LST. The aim of this research is to comprehend the environmental dynamics of DIY (Yogyakarta Special Region) by exploring the relationship between NDVI and LST. Through the Pearson correlation method, the relationship between these variables is deeply evaluated. The analysis reveals a significant correlation between changes in NDVI and LST, indicating a complex interaction between vegetation and land surface temperature. However, these significant findings have minimal impact on Yogyakarta City and Sleman, which serve as the focal points of community activities in Yogyakarta. These changes can be attributed to various factors, including changes in land use, urbanization, and climate variability, which show weak correlation values when associated with vegetation. Another finding is that Yogyakarta City exhibits the most distinct response in vegetation density and surface temperature compared to the surrounding four cities. This is attributed to Yogyakarta City being the administrative center and economic hub of DIY. These findings provide a deeper understanding of the environment's response to these factors in DIY. By employing spatial and temporal analysis, this study offers valuable insights for climate change mitigation efforts and adaptation to the evolving environmental dynamics.
Optimization of Hanger Spacing of Steel Arch Bridges Using Dynamic Loads Bathista, Moch. Dhoni; Sulasmono, Raden Ian; Risdanareni, Puput
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.67074

Abstract

Bridges are basic infrastructure that must be met to create regional connectivity in Indonesia. One type of bridge that is often used is a curved bridge, which has the advantages of high strength, attractiveness, aesthetics and economy. In order to accelerate the development of bridge infrastructure, an efficient innovation in curved bridge design is needed. The development of curved bridge structures to achieve efficient designs has received much attention in several decades. However, researchers have only focused on optimising the geometry variation of the arch height. Therefore, the aim of this research is to innovate the optimisation of the hanger spacing on the arch bridge structure. In order to obtain optimal results, a bridge model is carried out by varying the hanger spacing of the centre model with a hanger spacing ratio of (1.3 - 1.1 - 0.9 - 0.7), a flat model with a hanger spacing ratio of (1 - 1 - 1 - 1) and an edge model with a hanger spacing ratio of (0.7 - 0.9 - 1.1 - 1.3), so that from the three models, the effect of hanger location on three conditions is obtained. Each model is modelled in the SAP2000 software and given a bridge service load to obtain the internal forces and deflections that occur. The output of the internal force and deflection is then analysed to determine the effect of the location of the bridge service hanger. The serviceability of the bridge is also analysed by calculating the ratio between the weight of the bridge and the deflection that occurs. The results of the analysis show that the location of the hanger affects the performance of the arch bridge structure. The centre model bridge design produces the most efficient structural performance in resisting the compressive axial forces and moments that occur, and produces the least deflection. Meanwhile, the edge model will provide the most efficient structural performance in resisting tensile axial forces.  By referring to the results of the bridge weight to deflection ratio analysis, it can be concluded that the centre model produces the most efficient structural design when compared to other curved bridge models.
Investment Feasibility and Strategic Development Scenarios of Yogyakarta-Bawen Toll Road Danubroto, Radyo Wijoyo; Malkhamah, Siti; Amrozi, Muhammad Rizka Fahmi
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.64152

Abstract

This study examines the feasibility of the investment in the Yogyakarta-Bawen toll road project by analyzing traffic conditions, expenditure costs, toll revenues, and investment value. Simulation using PTV Visum shows a significant increase in the volume-to-capacity ratio (VCR) on the national road sections around the toll road until 2061. The modeling result also indicates that the operation of the toll road reduces traffic loads on several surrounding national road sections with a decrease in VCR. The analysis results reveal a negative net present value (NPV) amounting to -Rp.506,560,648,100, and an internal rate of return (IRR) of 11.49% is under the discount rate (12.03%). In the tariff adjustment scenario, the project shows an IRR of 12.48% with an NPV of Rp 575,501 million, and the payback period (PBP) is achieved after 16 years. In the concession adjustment scenario, the IRR is 12.12% with an NPV of Rp 123,461 million, and the PBP is achieved after 17 years. Meanwhile, the tariff and concession adjustment scenario show an IRR of 12.48% with an NPV of Rp 652,033 million, and the PBP is achieved after 16 years. Based on the investment feasibility evaluation, the recommended best strategy is tariff adjustment. This strategy allows for an optimal increase in toll revenue and investment returns. It is expected that the Yogyakarta-Bawen toll road project can achieve better investment feasibility and provide long-term benefits to investors, road users, and the overall community.
Infrastructure Management of the Smart and Green Learning Center Building Using the Analytical Hierarchy Process (AHP) Balqis, Ratu Irmi; Priyosulistyo, Henricus; Irawati, Inggar Septhia
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 20 No. 1 (2024): May
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v20i1.67639

Abstract

Building infrastructure management is a key element in maintaining and improving the efficiency, sustainability, and quality of a building. The Smart and Green Learning Center (SGLC) building at Gadjah Mada University is a modern building that functions as both an administrative office and a lecture hall. The building boasts a modern design featuring extensive use of glass and stands 11 stories tall. It embodies the concept of a green and smart building. Hence, it requires serious attention in terms of effective maintenance and proper maintenance to ensure the building can function properly. This research uses the Analytical Hierarchy Process (AHP) method to obtain weighting values for room components/elements. This weighting value is then used to calculate the SGLC building component condition index, which can provide information of whether the component is damaged or not. The weighting values are obtained by distributing questionnaires, while the condition index is determined through observation. The components observed include structural, architectural, and utility components. The results show that weighting values for structure, architecture and utilities were 46.3%, 33.9% and 19.8%, respectively. In the structural components, it is found that the column, beam, and plate weighting values are 48.3%, 42.7% and 8.9%, respectively. In the architectural components, the weighting values for ceilings, walls, floors & ceramics, doors & windows are 11.7%, 36.6%, 8.8%, 42.9% respectively. In the utility components, the weighting values for electricity, electronics, elevators, building sensor systems, and plumbing are 30%, 22.3%, 4.9%, 19.1%, and 23.7%, respectively. After searching floors 1 to 11, it was seen that the structural components were still in exceptionally good condition. There is only minor damage to utility and architectural components that require maintenance such as repair or replacement of components that are no longer suitable for use.

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