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Articles 44 Documents
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NONLINEAR ANALYSIS OF THE BEHAVIOR & PERFORMANCE OF MULTISTORY STEEL BUILDING STRUCTURES WITHOUT AND WITH STEEL PLATE SHEAR WALLS P Adi Yasa; I Gede Adi Guna Apriana; Ida Bagus Prastha Bhisama; Made Hendra Prayoga
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 1 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 1, Maret 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.v29.i01.p05

Abstract

Indonesia, as a region highly susceptible to earthquakes, necessitates the construction of earthquake-resistant buildings, particularly multi-story steel structures. Steel Plate Shear Walls (SPSWs) offer an effective solution for resisting lateral loads. This research compares the behavior and performance of three (3) building models: an Open Frame (OF) Model, a Uniform Thickness Steel Plate Shear Wall (SPSW-UT) Model, and a Varied Thicknesses Steel Plate Shear Wall (SPSW-VT) Model. Linear analysis are running with equivalent static to get the structural behaviour & pushover for nonlinear analysis to get the structural performance. In terms of structural behavior, the inclusion of SPSWs in both the SPSW-UT and SPSW-VT models significantly enhances structural stiffness, evidenced by a drastic reduction in the fundamental period compared to the OF Model (without SPSW). The SPSW-UT Model reduces inter-story drift by up to 34.23% (X-direction) and 50.69% (Y-direction), while the SPSW-VT Model also shows similar reductions of up to 30.98% (X-direction) and 49.80% (Y-direction) compared to the OF Model. From a performance point view’s, the SPSW-UT Model increases the maximum base shear by up to 20.19% (X-direction) and 32.29% (Y-direction), while the SPSW-VT Model increases it by up to 13.34% (X-direction) and 25.96% (Y-direction) compared to the OF Model. Furthermore, both SPSW models achieve an Immediate Occupancy (IO) performance level for both pushover directions, whereas the OF Model only reaches IO in the X-direction and Damage Control (DC) in the Y-direction, demonstrating a significant performance improvement due to the use of steel plate shear walls.
THE EFFECT OF PRECURSOR-ACTIVATOR RATIO AND ACTIVATOR TYPE ON THE BULK DENSITY, COMPRESSIVE STRENGTH, AND MICROSTRUCTURE OF ABUAN PUMICE-BASED GEOPOLYMER BINDER Dewa Ayu Anggitha Pitaloka; I Made Alit Karyawan Salain; Ida Bagus Rai Widiarsa
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p10

Abstract

This research developed a geopolymer binder based on pumice waste from Abuan Village, Kintamani, which is rich in silica and alumina, with a composition of SiO₂ 55.90%, Al₂O₃ 12.00%, CaO 6.25%, and other metals around 8.61%. The activators used are Na₂SiO₃ combined with either NaOH or KOH at a concentration of 12 M, with precursor-activator (P/A) ratios of 75%:25%, 70%:30%, and 65%:35% and an alkali ratio of NS/NH at 2:1. Cube samples 50 x 50 x 50 mm were analyzed to measure bulk density and compressive strength at 7, 14, and 28 days after being cured in an oven at 80°C for 72 hours. The bulk density test results for samples using NaOH showed an increase as the P/A ratio increased, but a decrease as the testing age increased. Then, the bulk density results for KOH samples showed the opposite trend both in terms of P/A ratio and age. The average compressive strength test for NaOH samples increased with the P/A ratio, and while it fluctuated by age, it continued to increase overall. The KOH samples followed a similar trend in P/A ratio but tended to decrease over time. This behavior is influenced by the chemical and physical properties of the activators used. Microstructural analysis was conducted using X-Ray Diffraction (X-RD) on the samples with the lowest and highest compressive strength. New minerals formed in NaOH samples, including Sodium Aluminosilicate, Albite, and Anorthite, while KOH samples showed formations of Dipotassium Sulfate (VI) – Alpha, Ht, Albite, and Cristobalite.
ROUTE SELECTION FOR PILE DISTRIBUTION AND INTERSECTION PERFORMANCE ANALYSIS ALONG THE ROUTE I Gusti Raka Purbanto; I Wayan Suweda; I Gede Restu Anggandika
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 1 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 1, Maret 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.v29.i01.p04

Abstract

The distribution of piles to the installation site requires consideration of various factors, including travel time and route conditions to allow delivery vehicles to maneuver freely. This research aims to determine the optimal time and alternative routes for delivering piles from PT. Satriacipta Astakencana, located at Jl. Prof. Dr. Ida Bagus Mantra Km. 14.5, Sukawati, Gianyar, to the NUGRAA Apartment project site on Jl. Pantai Batu Bolong Canggu. This is due to considerations of distance and delivery time, as well as the frequent traffic conflicts at the unsignalized intersection of Jl. Raya Canggu and Jl. Pantai Berawa. This study uses a method of collecting field survey data, observation, and literature studies. Route selection is based on the shortest distance and fastest time, while the delivery time through the intersection is determined according to the smallest average intersection delay. Based on the analysis, the alternative route via Route 1 from PT. Satriacipta Astakencana - Jl. Gatot Subroto- Jl. Raya Kerobokan - Jl. Raya Canggu - Jl. Pantai Batu Bolong to the delivery location, with a distance of 26.7 km, travel time of 49 minutes, and the selected departure time of 05.00 WITA, is recommended. The analysis shows that the intersection performance during peak hours (07.00-08.00 WITA) has an average delay of 40.42 seconds/smp at intersections I and II. The queue probability at both intersections has exceeded 100% with a level of service of E. Therefore, the suitable time to pass through the intersection is between 05.00-06.00 WITA with an average delay of 10.82 seconds/smp at intersection I and 10.12 seconds/smp at intersection II, with a level of service of B for both intersections..
Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024 Jurnal Ilmiah Teknik Sipil
Jurnal Ilmiah Teknik Sipil Vol. 28 No. 2 (2024): Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v28.i02.p00

Abstract

Cover and TOC Jurnal Ilmiah Teknik Sipil, Vol. 28 No. 2, September 2024
EFFECT OF ASPHALT CONTENT ON THE SURFACE TEXTURE OF ASPHALT CONCRETE-WEARING COURSE (AC-WC) MIXTURE Meutia Regita Cahyani; Eti Sulandari; Slamet Widodo
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 2 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 2, September 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.V29.i02.p04

Abstract

Road preservation is carried out as an effort to improve road quality, evaluated through surface roughness levels, considering that adequate road texture is a crucial factor in ensuring rider safety and comfort. This study aims to analyze the relationship between variations in asphalt content and the Mean Texture Depth (MTD) value in asphalt mixtures. Surface roughness measurements obtained through the Sand Patch Method are expressed as MTD values representing average texture depth. Results for asphalt contents of 5%, 5.5%, 6%, 6.5%, and 7% yielded MTD values of 0.59 mm, 0.54 mm, 0.48 mm, 0.36 mm, and 0.26 mm for the upper side; 0.45 mm, 0.48 mm, 0.41 mm, 0.32 mm, and 0.24 mm for the lower side; and 0.52 mm, 0.51 mm, 0.45 mm, 0.34 mm, and 0.25 mm for the combined upper-lower sides. The relationship between MTD and asphalt content was analyzed using linear regression with the coefficient of determination (R²) as the evaluation parameter. Asphalt content influenced texture depth by 66.34% (upper side), 47.3% (lower side), and 53.73% (combined sides). The Voids Filled with Bitumen (VFB) parameter significantly contributed to MTD variation, with influence levels of 41.3% (upper), 46.07% (lower), and 43.13% (combined). The analysis demonstrates that lower asphalt content produces rougher asphalt mixture surface textures. AC-WC mixture testing confirms that asphalt content affects MTD values.
EXPERIMENTAL STUDY ON THE FAILURE PATTERN OF COHESIVE SOIL UNDER FINNED SLABS THROUGH LOAD TESTING Megasim; M. Yusuf; Vivi Bachtiar
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 2 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 2, September 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.v29.i02.p02

Abstract

Rapid infrastructure development demands reliable road pavement systems, especially on expansive and low-bearing capacity cohesive soils. This research investigates the addition of fins to pavement slabs as an innovative rigid pavement design. The study investigates how fins and their varying inclination angles 0°, 30°, 60°, 90° affect failure patterns and bearing capacity in cohesive soil. Tests on five slab types revealed distinct behaviors. Finless slabs and those with 90° fins showed shallow local shear failure. The 0° finned slab formed wedge failure due to stress concentration. Slabs with 30° and 60° fin inclinations exhibited a more distributed failure pattern with a wider plastic zone, indicating efficient stress distribution. The highest ultimate bearing capacity was achieved by 60° finned slab, reaching 10.60 kN, followed by the 30° finned slab at 6.20 kN. The 0° finned slab showed the bearing capacity at 3.53 kN. These significantly outperformed the finless slab at 3.40 kN and the 90° finned slab at 4.00 kN. These findings suggest that specific fin configurations can significantly improve slab performance on cohesive soil, offering a solution for problematic soil conditions in rigid pavement systems.
BEARING CAPACITY AND SETTLEMENT ANALYSIS OF DRILLED PILE FOUNDATION AT THE ASN-4 IKN APARTMENT CONSTRUCTION PROJECT Made Dodiek Wirya Ardana; I Made Aryatirta Predana; Ni Ketut Aprilia Kartiana Dewi
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 1 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 1, Maret 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2024.v29.i01.p10

Abstract

The relocation of the capital city requires the development of various essential infrastructures to support the functions of the National Capital. ASN-4 IKN Apartment is one of the vertical housing projects that implements land efficiency by constructing high-rise buildings. A thorough analysis of foundation bearing capacity and settlement is necessary, given the unique soil conditions and the lack of previous research in the area. If the foundation does not have sufficient bearing capacity, it may lead to settlement due to the loads applied above it. Therefore, both analyses are crucial during the planning process and should be monitored during implementation through load testing on drilled piles to obtain values for bearing capacity and settlement. This analysis aims to calculate and compare the bearing capacity and settlement of the foundation using analytical methods, the finite element method with the assistance of PLAXIS 2D software, and field load testing through the PDA Test. The ultimate bearing capacity results obtained from the Reese and Wright method are 1076,820 tons, with PLAXIS 2D software 805,576 tons, and from the PDA Test 727 tons. The percentage comparison of bearing capacity values between the Reese and Wright method and the finite element method against the PDA Test are 48,118% and 10,808%. Meanwhile, the settlement values using the empirical method are 10,082 mm, with PLAXIS 2D software 2,742 mm, and from the PDA Test 2,3 mm. The percentage comparison of settlement values between the empirical method and the finite element method against the PDA Test are 1,070% and 0,061%.
ANALYSIS OF IRRIGATION WATER QUALITY INDEX AND EVALUATION OF LAND SUITABILITY IN DRYLAND IRRIGATION SYSTEMS AS EFFORTS TO OPTIMIZE AGRICULTURAL PRODUCTIVITY Luthfi Inayah; I Putu Gustave Suryantara Pariartha; Silvia Gabrina Tonyes
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 2 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 2, September 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.v29.i02.p10

Abstract

The availability and quality of irrigation water is an important factor in ensuring the sustainability of agricultural productivity, especially in drylands that are prone to drought such as in Abang District, Karangasem Regency, Bali. This study aims to analyze surface water quality for irrigation and evaluate land suitability through a comparative approach between the National Sanitation Foundation-Water Quality Index (NSF-WQI) method and the Index of Surface Water Susceptibility to Pollution (IKAPP). Surface water samples from Tukad Nyuling were analyzed based on physical and chemical parameters, and land suitability evaluation was also conducted by considering soil characteristics, such as permeability. The results showed that NSF-WQI values ranged from 69.96 to 79.78 within moderate to high limits while IKAPP water quality index values ranged from 23.69 within low vulnerability limits, this could be due to salinity constraints and contaminant indicators. A comparative rational analysis was then conducted which indicated that NSF-WQI is more suitable for use in the study area because it is able to capture variations in water quality that correlate with local physical, hydrological, and agroecological conditions. Integration of NSF-WQI results with land evaluation resulted in specific land management recommendations as well as crop suitability classifications, such as corn, green beans, chili, and other horticulture. This study concludes that in addition to being a representative measure of irrigation water quality, the application of the analysis supports efforts to improve less suitable land, through measures such as crop suitability evaluation, salinity management, and soil permeability improvement, thereby increasing agricultural productivity and supporting sustainable dryland management in Abang Sub-district.
BATHYMETRIC-BASED SEDIMENTATION ASSESSMENT IN BALI’S VOLCANIC LAKES Luh Ayu Putri Wedayanti Pulasari; I Dewa Ayu Meia Damayanthi; Ni Luh Putri Prabandari
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 2 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 2, September 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.V29.i02.p05

Abstract

The volcanic lakes of Bali, such as Batur, Beratan, Buyan, and Tamblingan, play a critical role in water provision, ecosystem services, and socio-cultural values. In addition to serving as raw water sources for irrigation, domestic use, dan tourism, these lakes also carry important conservation and spiritual functions embedded in Balinese cultural life. However, land-use changes, agricultural intensification, and tourism development within their catchments have accelerated erosion and sediment transport into the lakes. This sediment accumulation has resulted in lakebed shallowing and reduced storage capacity, thereby threatening the long-term sustainability of their hydrological and ecological functions. This study aims to examine sedimentation processes and potential shallowing through a 2024 bathymetric survey of Bali’s four main volcanic lakes. The analysis indicates an increase in sediment deposition between 2023 and 2024, with average thicknesses of 0.12 m in Lake Batur, 0.24 m in Lake Beratan, 0.49 m in Lake Buyan, and 1.56 m in Lake Tamblingan. Among these, Lake Tamblingan recorded the greatest thickness of sediment accumulation. These findings highlight the importance of regular monitoring of lake conditions. Bathymetric analysis can serve as a scientific basis for technical conservation planning, including dredging, upstream erosion control, and zoning of lake areas according to their vulnerability to sedimentation.
ENGINEERING DESIGN OF BREAKWATER STRUCTURES FOR COASTAL EROSION MITIGATION: A CASE STUDY IN SRAGI, SOUTH LAMPUNG Suciana Suciana; Mustarakh Gelfi; Pandu Nababan
Jurnal Ilmiah Teknik Sipil Vol. 29 No. 2 (2025): Jurnal Ilmiah Teknik Sipil, Vol. 29 No. 2, September 2025
Publisher : Universitas Udayana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24843/JITS.2025.v29.i02.p08

Abstract

Kuala Jaya Beach, located in Bandar Agung Village, Sragi District, South Lampung, is experiencing severe coastal erosion, leading to shoreline retreat and degradation of coastal ecosystems. This study presents the engineering design of breakwater structures as a mitigation strategy. The design process considered key parameters, including significant wave height and period, Highest High Water Level (HHWL), wave refraction and breaking coefficients, wave set-up, projected sea level rise, wave run-up, and structural stability based on Terzaghi and Hudson equations. Wave characteristics were analyzed using a Weibull distribution for a 50-year return period, yielding a significant wave height of 2.26 m and a period of 6.98 s. Tidal analysis used the Admiralty method to determine an HHWL of 0.63 m. Three types of armor layers were evaluated: natural rock, concrete cubes, and geobags. The resulting crest widths were 2.0 m, 1.8 m, and 2.8 m, with corresponding elevations of 3.76 m, 3.0 m, and 3.6 m. Two breakwaters, 1000 m and 800 m in length, were positioned at a depth of 5 m near the wave-breaking zone. Stability analysis showed armor to secondary layer ratios of 2.4 for concrete cubes and 2.0 for natural rock. All designs allow controlled seepage, dissipating wave energy, and effectively preventing further shoreline retreat.

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