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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 312 Documents
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Surface Runoff Analysis Using SCS-CN Method in Summarecon Serpong Area Cantik, Bella Koes Paulina; Sapan, Elenora Gita Alamanda; Ghiffari, Muhammad Razzaaq Al; Yuvhendmindo, Muhammad Ravi; Aziz, Muhammad Luthfi
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.53248

Abstract

The increasing population is definitely in line with the rising demand for housing. One area with many residents is Tangerang Regency, Banten with a population growth rate of 5,85% per year. PT. Summarecon Agung Tbk. becomes one of the developers of an integrated area in Tangerang Regency in fulfilling housing's need. However, the wider the development of an area, it is parallel with the changes in land cover that significantly impact surface runoff. Therefore, this study aims to determine the surface runoff in the Summarecon Serpong area. The research method used is the Secondary Data Analysis (SDA) approach which requires several data; rainfall, land cover, and soil type. These data were then processed using Frequency Analysis to obtain design rainfall and continued to the SCS-CN Method to obtain surface runoff with the return period at 2 years, 5 years, 10 years, 20 years, and 100 years. The land cover in the Summarecon Serpong area was dominated by buildings, with the Hydrologic Soil Groups (KHT) in the form of Groups C and D. The calculation of the Composite Curve Number (CNk) value based on land cover and Hydrologic Soil Groups were 88,89, while the calculation of direct runoff using the SCS CN Method with a return period of 2 years, 5 years, 10 years, 20 years, and 100 years respectively were 77 mm, 121 mm, 154 mm, 188 mm, and 275 mm. The lowest surface runoff occurred on land cover in the form of green open land with Hydrologic Soil Group C, and the highest surface runoff occurred on land cover in the form of water bodies. This analysis indicates that focusing on the green open land in the Summarecon Serpong area can reduce surface runoff while increasing infiltration to maintain the sustainability hydrologic system.
Preparedness of Tsunami Disaster in Pandeglang Region Due to The Activity of Mount Krakatau Ningtyas, Nadya Nur; Satyarno, Iman; Triatmadja, Radianta
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.54054

Abstract

Pandeglang Regency is one of the areas with the most building damage in The 2018 Anak Krakatau Tsunami. The tsunami in 2018 was caused by the activity of Anak Krakatau Volcano in the form of an avalanche of material on the volcano's cliffs. The subdistricts in Pandeglang Regency affected by the tsunami were Carita Subdistrict, Labuan Subdistrict, and Panimbang Subdistrict. This research evaluates potential damage to buildings to determine the condition of the existing land, determines an evacuation route to a temporary evacuation site (TES), and simulates a tsunami evacuation using this evacuation route. Parameters of run-up height and building type are used as parameters for assessing building damage. The determination of TES is influenced by run-up height, elevation, and distance from the shoreline. Evacuation route planning and evacuation simulation are based on the assumed number of evacuees and the scenario of a tsunami evacuation. The results showed moderate damage to buildings in Carita Subdistrict, Labuan Subdistrict, and Panimbang Subdistrict. The examination of existing land as TES, namely Carita Vacant Land, Carita 1 Middle School, LDII Labuan Mosque, Labuan Shelter Building, Panimbang Vacant Land. According to the tsunami evacuation scenario during the day, evacuation time results for 25-30 minutes with an average speed of > 1 m/s. The tsunami evacuation time at night is free of obstacles or with obstacles for 50-85 minutes with an average speed of 1 m/s. The tsunami evacuation time at night is full of free and obstacle-free tours for 60-100 minutes with an average speed of 0.5 m/s. Evacuation time based on simulation results is compared with evacuation time calculated by ETA and other studies as data validation to determine the probability of community preparedness in the Pandeglang Regency. The preparedness community in Pandeglang Regency is in the ready category by 25% in the Carita subdistrict, Labuan subdistrict, and Panimbang Subdistrict.
3-Dimensional Numerical Simulation of Nailed Slab System Settlement Behavior on Soft Soil Abdurrahman, Ekie Aulia; Hardiyatmo, Hary Christady; Rifa'i, Ahmad
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.48375

Abstract

The design of the YIA airport rail line is on soft soil with a depth of 12-16 m. The design of the rail line uses a 4 m high embankment. Reinforcement is carried out by the method of a nailed slab system. The nailed slab system consists of a monolithically connected slab and pile. This method is believed to be able to reduce the settlement that occurs in the foundation soil effectively. This study aims to determine the effect of using a nailed slab system that varies in length, distance, and arrangement. The data used are boring and laboratory tests. Effect of variations in length (8 m; 10 m; 12 m and 14 m), distance (0.8 m; 1.2 m; 1.6 m; and 2 m), and pile arrangement (uniform; V and W) on soil settlement foundation is done with the RS3 program. The results showed that each additional 2 m of pile length could reduce the total settlement by 48.63%-82.31% of the unreinforced foundation soil. The decrease in permits was fulfilled at the length of the piles of 12 m and 14 m. Pile spacing of 0.8 m, 1.2 m, 1.6 m, and 2 m reduced the total settlement by 69.47%, 68.78%, 67.22%, and 60.90%, respectively. On piles with a length of 12 m, distances of 0.8 m and 1.2 m fulfilled the allowable reduction. The use of the V arrangement gave the greatest reduction of 71.77% while the uniform arrangement was 68.78% and the W arrangement was 68.56%. The use of a nailed slab system as foundation soil reinforcement due to embankment load can reduce settlement effectively.
The Impact of Dam Reservoir on Flood Reduction (Case Study Logung Reservoir, Kudus, Central Java) Fajriani, Qonaah Rizqi; Nur Utari, Khoirunnisa Ulya; Nurulita, Ria
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.55409

Abstract

The Indonesian government targeted building 65 reservoirs and dams in 2015-2022. The purpose is to maintain food security facing the long-term climate crisis, besides reducing the impact of a flood. Logung  Reservoir is located on the Logung River, Kudus, Central Java. This earth-fill dam was built to solve the flood and drought problems in Kudus. However, the existence of the Logung Reservoir gives a risk to the downsteam area. The purpose of this research is to study flood reduction and the risk of overtopping, which can cause a dam break, and to calculate the Logung Reservoir spillway's performance in handling floods. This study is based on four main steps: the rainfal-runoff modelling, the extreme rainfall estimation, the hydrograph inflow of the dam estimation, and the evaluation of food reduction. The results of the 1000-year rainfall analysis and PMP for the Logung dam basin were 409 mm and 704 mm, respectively. Rainfall distribution is made using ABM, and effective rainfall is calculated by the SCS method. Land use analysis in the Logung dam watershed obtained a CN-II of 71.4 and a CN-III of 85.2. The rainfall-runoff transformation method used a unit hydrograph. The Nakayasu and Gama-I unit hydrographs show significant differences from the peak discharge, although not for the time base. The flood hydrograph design affects the reservoir performance. The reservoir flood routing results a dumping efficiency of 35% for the 1000-year and 21% for PMF. The 1000-year flood routing shows that there was no risk of overtopping. The highest water level on the PMF flood routing at +94.1. Several solutions can prevent overtopping by reducing inflow discharge through small dams upstream, increasing the green area, or modifying spillway structure.
The Effect of Mortar Mixture Variations on the Compressive Strength and Ultrasonic Pulse Velocity Nugroho, Maris Setyo; Ma'arif, Faqih; Widodo, Slamet; Rachmi, Dewi; Fajriani, Qonaah; Suryadwanti, Novia; Setiawan, Wildan
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.55256

Abstract

This paper examines the correlation between compressive strength, porosity, and ultrasonic wave propagation in mortar. The research was conducted at the Yogyakarta State University Building Materials Laboratory. The study used an experimental method, mortar was made with variations in the ratio of cement and fine aggregate 1:3, 1:4, 1:5, 1:6, and 1:7 with a phase of 0.48. The manufacture of test objects in the form of a cube measuring 5x5x5 cm refers to SNI 03-6825-2002. Tests were carried out at the age of 3, 7, 14, 21, and 28 days with three samples per test age. The data was processed by quantitative descriptive method to determine the relationship between the variables, especially the relationship between wave propagation speed and compressive strength, as well as its relationship with the porosity value. The results of compressive strength and wave propagation speed are directly proportional to the age of the test. With the results of the compressive strength at 1:3, 1:4, 1:5, 1:6, and 1:7 variants, respectively 31.12 MPa, 19.83 MPa, 12.25 MPa, 5.38 MPa, and 3.89 MPa and wave propagation speed of 3827.67 m/s, 3641.7 m/s, 3561.3 m/s, 2019,0 m/s, and 1691.0 m/s. Then the porosity values are 11.12%, 12.88%, 16.36%, 17.60%, and 22.06%. The compressive strength has a correlation that is directly proportional to the logarithmic speed of wave propagation, the higher the value of the compressive strength, the higher the UPV value, and inversely proportional to the porosity value as well as the speed of the wave propagation which is inversely proportional to the porosity value. The higher the porosity value, the lower the compressive strength value and the UPV value.
Do Household Characteristics Influence Private Car and Motorcycle Ownership? Evidence from a Case Study in Yogyakarta Urban Area, Indonesia Rachmi, Dewi Prathita; Irawan, Muhammad Zudhy; Dewanti, Dewanti
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.55411

Abstract

Yogyakarta is listed among the cities with the worst congestion in Indonesia. Besides, the development of Yogyakarta has now expanded to the surrounding area and agglomerated into the Yogyakarta Urban Area (KPY). Private vehicle ownership is closely correlated to the characteristics of households. This study aims to analyze the correlation of the level of private vehicle ownership with the characteristics of households and the correlation of private vehicle ownership towards the responses of households with transportation policies that will be implemented in the future. This study fully used secondary data. The total respondents were 8,810 households, and the research location was the Yogyakarta Urban Area (KPY). The path analysis was employed to find out the causal relation between variables and the contribution between variables in the analysis. The variables used were gender, age, education level of the heads of households, total household income, the number of adult family members (> 17 years old), the number of children (<17 years old), the number of working family members, total motorcycle licenses in a household, total driver's licenses in a household, total motorcycle ownership in a household, total car ownership in a household, and the responses of households to the transportation policies that will be applied. The results of the study show that motorcycle ownership in a household is influenced by gender, age, the level of education of the heads of households, total household income, the number of adult family members, the number of children, the number of working family members, and total motorcycle licenses in a household. Meanwhile, car ownership in a household is influenced by age, total household income, the number of working family members, and total driver's licenses in a household. There is also a correlation between motorcycle and car ownership. Increasing car ownership in a household has a positive correlation with motorcycle ownership. Furthermore, motorcycle ownership has a good significance value and a positive correlation with pedestrianization policies prioritizing public transportation in the Mangkubumi-Malioboro-Kraton area.
The Optimum Vibration of the Compressive Strength of Concrete Specimen Karisma, Dwifi Aprillia; Candra, Agata Iwan; Ali, Mahardi Kamalika Khusna; Sari, Tiara Sherlyta; Pertiwi, Sheila Ananda Putri
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.54522

Abstract

Concrete is the primary material in construction, so it needs further research to get good quality concrete. The quality and durability of concrete are influenced by the amount and shape of the air cavity inside the concrete. With vibrating, the air that is inside the concrete will be lost. The benefits of vibration will only be achieved if planned and implemented with a suitable method. With proper vibration, the air in the concrete will come out and make porous concrete. Reduction or removal of air cavities will make concrete mixes strong with low permeability, increasing the durability of concrete. This study aims to determine the optimum strong vibrating on the compressive strength of Fc' 21,7 Mpa concrete. Vibrating will be performed on cylinder concrete samples with a duration time of 3 minutes and with different variations in acceleration 160 m/s2, 170 m/s2, 180 m/s2, 190 m/s2, 200 m/s2, variation velocity 140 mm/s, 150 mm/s, 160 mm/s, 170 mm/s, 180 mm/s, displacement variation 600 mm, 800 mm, 1000 mm, 1200 mm, 1500 mm. Each variation consists of 7 concrete samples. These tests were performed with methods of external vibrating by using MBT Vibrating table CO-410 in fresh concrete. Compressive strength testing is carried out at 28 days. This study shows that the optimum strong vibrating with acceleration 180 m/s2, velocity 160 mm/s, and displacement 1000 mm with the resulting compressive strength is Fc' 23.06 MPa. So that knowing the optimum vibration strength can be the basis for the implementation of vibration to get the planned concrete quality.
Evaluation and Redesign Based on Highway Geometric Design Guidelines 2021 (Case Study of Sampakan–Singosaren Road KM 13.8, Bantul Regency) Wibowo, Dian Eksana; Putra, Yoga Pratama; Ma'arif, Faqih
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.54664

Abstract

This study aims to : (1) evaluate the geometric design of the Sampakan–Singosaren street km 13,8 Bantul Regency based on Panduan Desain Geometrik Jalan Bina Marga 2021; (2) identify the factor considered as evaluation, (3) propose alternative design and (4) to evaluate the differences between existing geometric design and alternative geometric design. The study used trial-and-error modeling for existing, and alternative geometric using Auto cad Civil 3D Student Version and analyzed according to Bina Marga standard. Then, a comparison of the existing and alternative geometric designs is calculated based on Bina Marga Geometric Design Standard 2021. The result indicates of study that there are 2 (two) existing curves with (1) each radius range at 37 m and 30 m, respectively; (2) the horizontal sight line offset on the first curve and the second curve was 4,7 m and 0.7 m, and the driving speed of 40 km/h. Furthermore, there is some parameter that does not meet the requirements, so an alternative design is required to fulfill the requirements of Bina Marga Geometric Design Standard 2021; (3) The designed shift on the new track to ± 9 m east and ± 5 m south; (4) the radius in both curve (S-C-S) is about 44 m, (5) horizontal sight line offset on the first curve and the second curve was 8,38 m and 7,557 m. Some changes to the existing and alternative design are the larger radius, the lower super elevation, new track is more flexible, and the better JPH and horizontal sight line offset.
Demand Analysis of Material, Construction Equipment, and Labor on the Superstructure of Type I-Girder Bridge Tambunan, Reinhard; Aminullah, Akhmad; Sulistyo, Djoko
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.53651

Abstract

Infrastructure development is one of the government's main national priority programs to support economic growth and community welfare. One of the issues encountered related to infrastructure development is that the supply chain capacity of material resources, construction equipment, and labor is not yet ideal. The purpose of this study is to analyze the demand for materials, construction equipment, and labor in the construction work of the superstructure of the bridge. This study used secondary data from some bridge construction work packages obtained from the Directorate General of Spatial Planning and Development, Ministry of Public Works. The research step consists of 7 stages. The total number of research samples is 33 consisting of 15 materials (xn), 15 construction equipment (yn), and 3 labor (zn). Of the five bridge construction work packages that meet the research requirements, the type of materials with the largest total demand is cement (x3) 4.904.156,13 kg and asphalt (x5) 578.620,64 kg. Meanwhile, the results of the construction equipment demand analysis show that the heavy equipment with the longest total operational time is dump trucks (y5) 9.395,61 hours and cranes (y12) 2.942,98 hours. From the analysis of demand labor, it is known that the total working time required is workers (z1) 251.753,97 hours, handyman (z2) 151.209,71 hours, and foreman (z3) 59.303,11 hours.  In addition, from the five construction work packages, the prestressed concrete I (PCI) girder with the longest size is 45 meters with 35 pieces, while the PCI girder with the shortest size is 20.6 meters with 14 pieces. In terms of needs, the highest number of PCI girders is 42 pieces, and PCI girders with a minimum number of 10 pieces.
The Influence of Resident's Income Level on Rusunawa Perceptions of Satisfaction, Convenience, and Management Alfianarrochmah, Ilma; Nugroho, Arief Setiawan Budi; Handayani, Tantri Nastiti
INERSIA lnformasi dan Ekspose Hasil Riset Teknik Sipil dan Arsitektur Vol. 18 No. 2 (2022): December
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/inersia.v18i2.49245

Abstract

The increasing population growth rate causes a city to face the problem of limited land for residential development. Housing is a fundamental demand of the community that must be fulfilled, especially for low-income people. Through the construction of flats named Rusunawa, the government tries to fulfill the demand for decent housing and anticipates the emergence of slum settlements. In its development, there are Rusunawa whose management is not optimal in maintenance which results in unkempt conditions and causes residents to not get satisfaction and convenience in occupying housing. This study aims to analyze the level of satisfaction, the convenience of residents, and the management of Rusunawa. It is based on the income level of residents and identifies strategies for service improvement of Rusunawa management. This study uses primary data to obtain the level of satisfaction, comfort, and management of flats based on income levels. The data collected is preliminary data consisting of data from questionnaires to the residents of the apartments and data from interviews with the Rusunawa management agency. The method in this study uses a mixed method based on qualitative methods with interview techniques and quantitative methods with survey techniques (questionnaires). The results show that there is a significant difference in the level of building convenience based on the income level of the residents of the Rusunawa. The management of the Rusunawa has not reached its maximum goals related to implementing the Rusunawa regulation. Runaway development programs are required, such as providing counseling, participating in social activities regarding environmental care, and conducting socialization with residents, especially the priority aspects of unique flats for low-income communities.

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