Jurnal Teknik Sipil Terapan

Analisis Pengaruh Aliran Hidrodinamis Pada Oscillating Water Column Wave Energy Converter

2026-07-24T02:04:10+00:00

Ocean wave energy is a marine renewable energy that has potential for áreas with long shorelines and wide coasts. Oscillating Water Column (OWC) is a device that captures and converts wave energy into electrical energy. This study aims to investigate the influence of hydrodynamic flows on the response of wáter columns within a bottom-standing OWC that has an L-shaped área. The flows may be influenced by the mouth shape of the OWC and the wáter viscosity that may increase friction and damping on the flows. Through the numerical models of the interactions between the waves at various periods and the OWC with different mouth shapes, the wáter elevations that arise within and outside the OWC, flow velocity and vortex generation were analysed. The present findings show that the OWC with a bell mouth generates minimal vórtices and hence larger amplitude of response. In contrast, the viscosity has little significance on the response. In addition to the damping mechanisms, this study analyses the influence of wáter depth on determining the natural periode of the wáter column. This is important in achieving maximal performance of the OWC by tuning a resonant condition on the wáter column.

Studi Komparasi Mortar Busa dan EPS Geofoam Sebagai Alternatif Timbunan Pada Oprit Flyover Nurtanio Menggunakan Metode Elemen Hingga

2026-08-03T00:50:22+00:00

The construction of flyovers is an important effort to reduce traffic congestion, particularly at railway level crossings and roads with high traffic volumes. One such infrastructure is the Nurtanio Flyover in Bandung City. However, constructing its approach embankment is challenging because the project is located in a densely populated urban area with limited working space and highly compressible subgrade, making conventional embankments susceptible to excessive settlement. This study compares two lightweight embankment materials: foam mortar as the existing material and EPS geofoam as an alternative. The analysis was performed using the finite element method (FEM) in PLAXIS 2D to evaluate stability and settlement, while construction methods and Bill of Quantity (BoQ) analyses were used to compare construction duration and costs. The results show that EPS geofoam increases the safety factor by 62.45% under static conditions and 26.49% under seismic conditions, while reducing settlement by 59.47% compared to foam mortar. In terms of construction, EPS geofoam shortens the construction period by 31.70% but increases costs by 33.06%. Overall, EPS geofoam demonstrates superior technical performance in stability, settlement reduction, and construction efficiency, whereas foam mortar remains the more economical option because of its lower overall construction cost for the project.

Penilaian Kinerja Lalu Lintas Jalan Garuda – Abdul Rahman Saleh Pasca Pembangunan Flyover Nurtanio Kota Bandung

2026-08-03T09:43:30+00:00

The increasing volume of vehicles in urban areas has contributed to traffic congestion, delays, and declining road performance. In response to these conditions, the Bandung City Government constructed the Nurtanio Flyover, connecting Garuda Street and Abdul Rahman Saleh Street to eliminate traffic conflicts at the at-grade railway crossing. This study aims to determine the road capacity, traffic performance, and Level of Service (LoS) of the road segment after the flyover became operational, based on the Indonesian Highway Capacity Guidelines (PKJI) 2023 and the Minister of Transportation Regulation No. KM 14 of 2006. The research employed a literature review, field surveys, and quantitative analysis. Primary data, including traffic volume and vehicle travel time, were collected through traffic counting, while secondary data comprised road geometric characteristics, land use, and population data. The analysis showed that the capacity of the Nurtanio Flyover was 2,660 pcu/h, while the frontage road had a capacity of 1,564 pcu/h. The highest degree of saturation was recorded on the flyover at 1.19, corresponding to LoS F, indicating that the traffic volume exceeded the road capacity. The frontage road exhibited a degree of saturation ranging from 0.08 to 0.34, with LoS D–E, due to geometric constraints and low vehicle speeds. Overall, the flyover successfully eliminated delays caused by the at-grade railway crossing; however, traffic performance on the flyover remains suboptimal, indicating the need for further traffic management measures.

Pemetaan Tingkat Konflik Berdasarkan Pelanggaran Menggunakan Metode Traffic Conflict Technique (TCT) di Jalan Laswi Kota Bandung

2026-08-04T06:12:17+00:00

Traffic conflicts are an indicator that can be used to identify potential accidents before they occur. Jalan Laswi in Bandung City is an urban arterial road with high traffic activity, where various violations, such as U-turns, crossings, and counter-traffic, are still found, potentially increasing traffic conflicts. This study aims to identify the types of conflicts, determine the level of seriousness of the conflicts based on violations using the Traffic Conflict Technique (TCT) method, and map the distribution of conflict levels on Jalan Laswi in Bandung City. Data collection was conducted through a survey of traffic volume, traffic conflicts, vehicle speeds, and distance between vehicles over three days of observation. Analysis was conducted using Time to Accident (TA) and Traffic Conflict (TC) parameters. The results show that conflicts are dominated by U-turns, crossings, and counter-traffic, with the highest concentration in Segment 3. The highest TA value of 0.52 seconds is categorized as a non-serious conflict, while the lowest value of 0.10 seconds is categorized as a serious conflict. The highest conflict rate reached 100,504 conflicts per 1,000 vehicles in Segment 3 northbound, while the lowest conflict rate was 0.131 conflicts per 1,000 vehicles in Segment 1 northbound. The results of the study indicate that the TCT method is effective in identifying priority locations for handling and supporting preventive traffic safety efforts.

Analisis Variasi Diameter Secant pile Untuk Galian Basement Pada Tanah Lunak

2026-08-07T14:37:07+00:00

Pembangunan basement pada kondisi tanah lunak memerlukan sistem penahan tanah yang mampu menjaga stabilitas galian dan mengendalikan deformasi tanah. Penelitian ini bertujuan untuk menganalisis pengaruh variasi diameter secant pile terhadap stabilitas dan deformasi galian basement serta menentukan diameter yang paling efisien. Analisis dilakukan pada galian sedalam 7,45 m di sebuah gedung komersial di Jakarta Selatan menggunakan metode elemen hingga (Finite Element Method/FEM) dengan bantuan perangkat lunak Plaxis 2D. Variasi diameter secant pile yang dianalisis yaitu 0,6 m, 0,8 m, dan 1,0 m pada kondisi pembebanan statik dan gempa. Parameter evaluasi meliputi faktor keamanan dan deformasi maksimum berdasarkan SNI 8460:2017. Hasil analisis menunjukkan bahwa galian tanpa perkuatan tidak memenuhi persyaratan faktor keamanan, sedangkan seluruh variasi secant pile mampu meningkatkan stabilitas galian hingga memenuhi persyaratan yang ditetapkan. Namun, diameter 0,6 m menghasilkan deformasi maksimum sebesar 4,22 cm yang melebihi batas izin sebesar 3,725 cm, sedangkan diameter 0,8 m dan 1,0 m masing-masing menghasilkan deformasi maksimum sebesar 3,57 cm dan 3,13 cm sehingga memenuhi batas deformasi yang diizinkan. Berdasarkan hasil tersebut, diameter secant pile 0,8 m direkomendasikan sebagai alternatif yang paling efisien karena memenuhi persyaratan faktor keamanan dan batas deformasi sesuai SNI 8460:2017.