Jurnal Teknik Sipil
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IMPLEMENTATION OF THE TRAFFIC CONFLICT TECHNIQUE METHOD AT PONTIANAK'S UNSIGNALIZED INTERSECTION
Full text linkThe high number of traffic accidents is a problem for the government in realizing traffic security, safety, and smoothness. Intersections are the most common point of conflict, especially unsignalized intersections. The research location of the intersection of Jl. Budi Utomo - Jl. 28 October-Jl. Parit Nenas, Siantan Hulu Village, North Pontianak District, and Pontianak City intersect environmental-type commercial roads with many vehicles and education centers. The research objectives are to identify traffic conflicts, analyze the level of traffic conflicts, and provide alternatives to overcome problems.Traffic Conflict Technique is an observation method to analyze traffic conflict that illustrates the seriousness of the conflict. The research data used CCTV recording for two days, Saturday and Tuesday. The Traffic Conflict Technique method uses the Time to Accident and Conflicting Speed values to determine the seriousness of the conflict.Based on the analysis of the Traffic Conflict Technique method, the research location with 34 vehicle conflicts has a severe level of conflict that could potentially cause accident risk. The level of serious conflict is 27 vehicle conflicts, with a percentage of 79.41%. Vehicle speed in the class 15 km / h - 19 km / h is the most severe conflict speed, with 12 vehicle conflicts and a percentage of 44.44%. Accelerating vehicle behavior is the most severe conflict, with 25 vehicle conflicts and a percentage of 83.33% of accidents that have the potential to occur. Alternatives to reduce the causes of accidents are adding traffic signaling devices and traffic signs to improve safety
DESIGN OF REINFORCED CONCRETE STRUCTURE WITH ORDINARY MOMENT FRAME IN LOW SEISMIC REGION (CASE STUDY: MIDRISE SHOPPING BUILDING IN SINGKAWANG CITY)
Full text linkThis paper focuses on the design of a reinforced concrete structure for an eight-story shopping building in Singkawang City, located in a low to moderate seismic area. The study integrates relevant design considerations in response to the region's seismic conditions. Through structural analysis, the building is categorized as seismic design category B due to moderate seismic risk, leading to the selection of an ordinary moment-resisting frame system compliant with SNI 1726:2019. Emphasis is placed on the importance of using such a system to enhance ductility and prevent brittleness during earthquakes.The research emphasizes the need to design structures capable of withstanding various loads, including dead, superimposed dead, live, wind, and earthquake loads, particularly in West Kalimantan, known for its historically low to moderate seismic activity. Recent earthquake records highlight the necessity of earthquake-resistant design for safety and durability. Structural analysis confirms the building's stability against seismic forces, with a modal participation ratio meeting SNI 1726:2019 requirements, indicating robust response under seismic loads.The study also assesses inter-story drift and P-Delta effects to ensure they meet allowable limits, which is crucial for preserving structural integrity and preventing post-earthquake instability. A detailed reinforcement design following SNI 2847:2019 enhances structural strength and durability, especially when under seismic loading. The foundation design uses tailored hollow spun piles to provide sufficient bearing capacity and stability. This approach demonstrates resilience against potential seismic events in low-to-moderate seismic regions, highlighting the importance of integrating seismic design principles and ductility considerations for effective earthquake hazard mitigation
EVALUATION OF NGABEAN SECONDARY CANAL IRRIGATION NETWORK, NGAWI DISTRICT PART OF SALURAN INDUK MADIUN IRRIGATION AREA
Full text linkThe SIM Irrigation Area has an area of 10,860 Ha and a primary canal length of 27,022 m, which passes through the Regencies of Madiun, Magetan, Ngawi, and Madiun City. One of the secondary canals in the D.I SIM is the Ngabean Secondary Canal, located in Ngawi Regency. This canal receives the main water supply from Jati Dam, 25% of the primary dam discharge and water withdrawal from the Ngabean Dam intake of 0.45 m3/ha. However, this value only meets the water needs of some of the irrigation areas. Due to the limited supply from the Jati Bendung, the government is working on rehabilitation work at the Jati Bendung. Apart from that, the Ngabean Secondary Canal also experienced a reduction in the irrigation area from 1840 ha to 1818 ha, to be precise in the NG3 Ki tertiary plot, which had an initial area of 120 ha to 98 ha. Therefore, an evaluation of the Ngabean Secondary Canal is needed to determine the value of water demand, water availability before and after rehabilitation and land reduction, and increasing agricultural profits.From the results of the analysis that has been carried out, it was concluded that the highest dependent flow at Ngabean Dam was 5.00 m3/s, and the lowest was 0.01 m3/s. Meanwhile, in conditions before rehabilitation, the highest dependent flow of Jati Dam was 1.01 m3/s, and the lowest was 0.00 m3/s with water withdrawal at the intake of 25%, able to fulfill the planting pattern of paddy (15%)-crops (75%)-crops (50%) generated a production profit of IDR 8.794.123.880,00. Meanwhile, after rehabilitation, the highest was 5.93 m3/s, and the lowest was 3.21 m3/s with an intake of 32%, able to fulfill the planting pattern of paddy (100%)-paddy (100%)-paddy (100%), resulting in a production profit of IDR 83, 564,115,480.00 with the highest irrigation water requirement value of 3.10 m3/sec. Apart from that, the existing canal dimensions still meet the requirements after land reduction, so no changes to the canal dimensions are required
International Roughness Index (IRI) Assessment Based on The Application of ROADBUMP and ROADROID on Sei Duri-Mempawah Road Section
Full text linkThe research assessed the condition of the Sei Duri-Mempawah road segment using the International Roughness Index (IRI) to determine surface roughness. Two smartphone applications, Roadbump and Roadroid, were evaluated against traditional laser profilometers to measure IRI values. The results indicate that at a speed of 20 km/h, the Roadbump application showed that 26% of the left lane was in good condition, with moderate, slightly damaged, and severely damaged segments accounting for 68%, 4%, and 2%, respectively. For Roadroid at the same speed, the left lane's condition was 76% good, while moderate, slightly damaged, and severely damaged conditions were at 16%, 3%, and 5%. Both applications demonstrated variations in IRI values at higher speeds, with Roadroid generally yielding higher roughness levels than Roadbump. Comparative analysis revealed that Roadbump at 40 km/h provided results closer to the laser profilometer, with up to 78% similarity on the left lane. However, the correlation analysis with BPJN data revealed weak correlations for most cases, except for a stronger relationship (R = 0.5521) between the 40 km/h Roadbump application and the laser profilometer. Thus, Roadbump at 40 km/h is recommended for practical field assessments
Design of Reinforced Concrete Structure of 6-story Ayani Square Office Shop Building with Intermediate Moment Resisting Frame System
Full text linkBuildings should be designed for strength and longevity, considering various loads like live, dead, and wind. In Kalimantan Barat, particularly Pontianak City, mild to moderate earthquakes are common, making it crucial to follow SNI 1726-2019 regulations for earthquake-resistant design. This includes using a Moment Resisting Frame system that allows the structure to absorb lateral forces and prevent sudden collapse. The chosen system reflects the building's function and soil data, ensuring it meets safety and practicality standards. For the Ayani Square Building, intermediate Moment Resisting Frames with seismic design category C were employed. The structure must adhere to SNI 1726-2019 for safety, with reinforcement designed per SNI 2847-2019 to enhance robustness. Spun piles are used in the foundation to provide stability and load-bearing capacity, effectively reducing seismic impact in moderate hazard zones.Keywords: Structural Analysis, Reinforced Concrete Structures, Intermediate Moment Resisting Frame Systems, and Seismic Design Category
INFLUENCE OF LAND USE CHANGE ON THE MAGNITUDE OF THE RUNOFF COEFFICIENT IN THE UPPER KAPUAS RIVER BASIN
Full text linkThe increase in population in the upper Kapuas Hulu River Basin will also increase the need for land. This increase in land demand can cause land use changes, affecting the runoff coefficient. Based on the reasons above, research was conducted to determine the effect of changes in land use on the magnitude of the runoff coefficient in the upstream part of the Kapuas River Basin from 2012 to 2017 and 2017 to 2022.The runoff coefficient calculation uses the U.S. Forest Service, Hassing, Kodoatie, and Syarief methods. Each method uses different parameters to determine the results. Data processing is carried out using a Geographic Information System (GIS).The analysis and calculations show that the runoff coefficient values obtained in the Upper Kapuas River Basin using the U.S. Forest Service method in 2012, 2017, and 2022 are 0,133, 0,136, and 0,145. The Hassing method results are 0,308, 0,309, and 0,312, and the Kodoatie and Syarief method results are 0,156, 0,167, and 0,173. This value shows that the Upper Kapuas River Basin is in reasonably good condition because the runoff coefficient value is far below 1
ANALYSIS OF FLOOD VULNERABILITY LEVELS IN LANDAK REGENCY USING GEOGRAPHIC INFORMATION SYSTEM
Full text linkLaw No. 24/2007 defines a disaster as a series of events that threaten and disrupt people's lives caused by natural, non-natural, and human factors, resulting in loss of life, environmental damage, and property loss. Landak Regency is one of the areas in West Kalimantan that is often flooded. Floods in Landak Regency impact people's lives, so they must be minimized. One of the efforts to minimize flooding is by mapping flood vulnerability. Flood vulnerability mapping is one of the early mitigations that utilize technological developments.This article presents the research results that aim to map the level of flood vulnerability in Landak Regency. The mapping was carried out using ArcGIS 10.8 software, and the data used are rainfall data, land use maps, slope, soil type, and land cover.The analysis shows the runoff coefficient rose from 0.16 in 2012 to 0.19 in 2021 due to land use changes converting forests and agriculture to settlements, impacting drainage. Flood vulnerability mapping identified highly vulnerable areas covering 21.41% of Landak Regency, focused near Ngabang, Sebangki, and Mandor, particularly along rivers. Vulnerability in Ngabang District decreased due to upstream spatial control policies, which established it as a protected forest area under regulations. Flood vulnerability assessment against Landak Regency's RTRW revealed flood-prone areas covering 490,097.51 Ha (60.77%), dominated by plantations (303,947.52 Ha), production forests (73,610.58 Ha), and agriculture (47,259.98 Ha). These results highlight the necessity of comprehensive spatial planning to effectively manage flood risks and protect Landak Regency's environment and communities
COST ANALYSIS OF SUSPENSION BRIDGE CONSTRUCTION IN KALIMANTAN BARAT PROVINCE
Full text linkThe successful implementation of a job begins with the determination of a reliable estimation value. One of the models used in determining the estimated value of a job, using data from the cost budget plan (RAB) on work that has been carried out, is the Cost Significant Model. In this study, the data used were five suspension bridge construction jobs starting from 2018 to 2022. the data obtained from the RAB is processed into independent variables and dependent variables, which are then tested using multiple linear regression methods using the SPSS application. Based on the results of the analysis, the influential variables are X2, namely Bridge Oprit Work; X4, namely Upper Building Work (Transportation and Installation of Truss Bridges); and X5, namely Lower Building Work (Angkur Block Work, Pyilon Foundations, Wind Ties) with a total weight of 85.30%. By using the equation Y = -21,640,343,680,000 + (1,856,843,372 x X2) + (453,953,095 x X4) + (41,965,201,370 x X5), the maximum value of 62.21% and minimum value of -98.05% are obtained, so it falls into the Class 5 category. Class 5 has an accuracy value ranging from +30% to +100%, so it is estimated that it is feasible to use it to carry out the initial concept screening estimation
Damage Analysis of Surface Layer on Jl. Pemuda, Sungai Rengas Using Pavement Condition Index (PCI) And Bina Marga Method
Full text linkRoad damage will have a detrimental impact, disrupting economic and social activities and causing high accident rates. Road damage is the decline in road quality caused by many factors, both in function and structural damage. This study analyzes road damage conditions to identify the types, levels, and solutions for addressing road damage using the Pavement Condition Index (PCI) and the Bina Marga Method on Jl. Pemuda, Sungai Rengas, Kubu Raya Regency. The PCI analysis found four types of damage on Jl. Pemuda: bleeding, edge cracking, potholes, and raveling. The road condition value shows that the Jl. Pemuda section is in the Very Poor category with a condition value of 21,80, and the handling solution is reconstructed according to the Asphalt Institute MS - 17 method. The analysis results using the Bina Marga method found four types of damage on Jl. Pemuda: pothole, raveling, fatty, and edge cracking. The road condition value was found to be a priority order with a value of 6, which means it falls into the category of a periodic maintenance program, which is also a handling solution coupled with several Standard Bina Marga 2011 methods—the Standard Bina Marga 2011 method for handling solutions on the Jl. Pemuda section is sand spreading, paving, crack filling, hole patching, and leveling.Keywords: Pavement Condition Index (PCI), Bina Marga Method, Road damage analysis, Pavement distress analysis, Reconstruction and maintenance methods
UTILIZING FIBER MESH AND NYLON ROPE AS NON-STEEL REINFORCEMENT FOR SANDWICH CONCRETE PLATE PRECAST IN COASTAL AREA STRUCTURES
Full text linkReinforced concrete, a popular construction choice, is often selected due to the limited availability of materials like wood and increased familiarity with concrete. However, coastal structures using steel bars in reinforced concrete usually face corrosion issues. Corrosion can be mitigated by increasing concrete compressive strength and enlarging the concrete cover to protect the steel from saltwater. These measures are challenging for small structures due to the small dimensions of columns, beams, and plates, making thick concrete covers difficult. Additionally, small structures are often built manually or semi-manually, complicating the achievement of higher compressive strength and watertightness. However, there is hope. Researchers have developed reinforced concrete with non-metal reinforcement, such as fiber mesh and nylon rope, and combined regular and lightweight concrete to reduce dead loads, creating a sandwich concrete slab. Test results show that the slab has sufficient strength for light construction, with a strong bond between mortar and foam concrete. Although fiber mesh and nylon rope do not yet increase the slab's flexural strength, nylon rope prevents brittle failure. This promising research paves the way for further studies and potential improvements in the future