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Journal of Civil Engineering
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 20861206     EISSN : 25799029     DOI : -
Core Subject :
Journal of Civil Engineering merupakan jurnal bidang teknik sipil yang mengacu pada sistem standar internasional dalam pengelolaannya dengan tujuan utama memajukan bidang teknik sipil melalui publikasi ilmiah demi terwujudnya kemudahan mendapatkan ilmu dan informasi serta mendukung kemajuan teknologi.
Arjuna Subject : -
Articles 10 Documents
 1 
Search results for , issue "Vol 39, No 1 (2024)" : 10 Documents clear
Significant Wave Height Model Calibration in The Sea Around Banyuwangi and Bali JBS, I.D. Bagus; Damarnegara, Satria; Dastgheib, Ali; Reyns, Johan
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.20395

Abstract

This paper describes significant wave height downscaling model in south sea around Banyuwangi and Bali. It utilizes 3rd Generation Simulating Wave Nearshore (SWAN) spectral model forced by ERA-5 Reanalysis data of wind and wave. The downscale is done using refined grid in Kuta Beach and Nusa Dua Beach. Model calibration conducted in the offshore and nearshore areas. The offshore wave results are validated using altimeter data, while the nearshore wave results are compared with site measurement in Kuta Beach and Nusa Dua Beach. A parametric study is performed to obtain model sensitivity and compared with observation, such as: wind multiplier factor, bottom friction coefficient, whitecapping, and wave breaking parameter. The model result gives good agreement with altimeter data. Indeed, the wind multiplier factor can be used as one calibration parameter in the wave model. The comparison with measured data shows good agreement in Kuta Beach, where the model can predict the nearshore wave transformation from offshore. Although, in Nusa Dua Beach the model nearshore wave transformation shows more dissipation if compared with wave measurement. Indeed, the downscaling process shows it can be used further in wave climate prediction after calibrated with measurement.
Factors Analysis Affecting Low Productivity in High-Rise Building Projects in Surabaya City Indonesia, Aileen; Wiguna, I Putu Artama
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.17410

Abstract

High-rise building construction projects are characterized by significant risks and numerous challenges, which frequently lead to low productivity, causing delays and hindering project completion. One way to address these problems is to analyze the risk factors of low productivity in construction projects using a clustering method based on their probability and impact. This approach helps determine the dominance level of each cluster and provides insights into the occurrence of risk factors that affect low productivity in high-rise building projects in Surabaya City. This research was conducted with surveys filled out by 37 respondents involved in four high-rise building projects in Surabaya City. The aim of this study is to analyze risk factor clustering and determine the dominance of each cluster affecting low productivity in high-rise building projects in Surabaya City by employing the Agglomerative Hierarchical Clustering method to identify clusters and determine the most dominant cluster using Euclidean Distance. From the literature review, 33 risk factors were identified as the variables of this research. The AHC method was carried out based on the mean probability and impact of each cluster obtained from the survey. The result of AHC is that Cluster 1 consists of 23 factors, Cluster 2 consists of 5 factors, and Cluster 3 consists of 5 factors. For the dominance level of each cluster, the Euclidean distance method was carried out, and the result was that Cluster 2 emerged as the highest overall risk, and Cluster 3 represented a low overall risk.
The Impact of Toll Roads on The Modes Choice Transportation Case Study: Banyuwangi-Surabaya Idham Kholid, Moh. Abda Ghoits; Herijanto, Wahyu
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.20004

Abstract

As the population increases, the level of activity and mobility will also increase. To facilitate people's movement, the Indonesian Government built infrastructure in the form of toll roads. The Trans-Java Toll Road stretches between Merak Harbor, Cilegon, Banten Province, and Ketapang Harbor, Banyuwangi, East Java Province. The Surabaya-Banyuwangi section is currently in the development stage. The existence of the Banyuwangi-Surabaya toll road will impact behavioural patterns in using transportation modes. Currently, several modes of land transportation can be used, i.e., buses via toll and non-toll (economy), trains, and private cars. The current travel time from Banyuwangi-Surabaya is 6 hours 30 minutes using a toll bus and 8 hours 15 minutes using a non-toll bus. In comparison, the travel time for the Wijayakusuma train mode (Banyuwangi-Surabaya) is 6 hours 2 minutes. Private vehicles (cars) also use a variety of different routes, causing the travel time and travel costs of private cars to be affected. Differences in travel time and routes used due to the existence of the Banyuwangi-Surabaya toll road change mode preferences between toll buses, non-toll buses (economy), trains, and private vehicles (cars). This research is a model for selecting transportation modes for the Banyuwangi-Surabaya route using the split modal method with an exponential function or difference function (β) with a value of NMAE= 0.0000087, where the NMAE value is close to 0, and can be used to estimate the proportion of modal choices on the Banyuwangi Surabaya route.
Optimization of Pre-Treatment Process in Spent Bleaching Earth (SBE) on The Characteristics of Pre-Treated SBE as Supplementary Cementitious Material Pramono, Christian Yoga; Sutrisno, Wahyuniarsih; Triwulan, Triwulan; Aji, Pujo
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.17438

Abstract

The palm oil processing industry in Indonesia has experienced significant growth, bringing both positive economic impacts and negative consequences, specifically the generation of spent bleaching earth (SBE), a waste product of bleaching earth. Despite its potential as a substitute material for cement due to its pozzolanic properties, challenges arise from SBE's oil content. Hence, this study introduces pre-treatment methods involving extraction and calcination to optimize the use of SBE, referred to as Pre-treated Spent Bleaching Earth (PSBE). This research aims to analyze the optimized PSBE material through the optimization of the pre-treatment process in the usage of mortar. The optimized PSBE is compared to another supplementary cementitious material, which is fly ash to see the performance of optimized PSBE as supplementary cementitious material. The performance of the mortar was evaluated through tests including slump test, compressive strength test, and mortar hydration temperature analysis. The pre-treatment process of SBE was optimized by combining extraction and calcination methods, which yielded the most effective results from oil content test. One of the performance analysis results showed that the compressive strength test revealed a 28-day compressive strength value of 50,22 MPa for the optimized PSBE mortar, while the fly ash mortar had a compressive strength of 37,36 MPa. In conclusion, the optimized PSBE shows promising potential as a supplementary cementitious material. 
Evaluation of Ability to Pay and Willingness to Pay Kualanamu Airport Railink User Service Sebayang, Deci Rianta Br; Widyastuti, Hera
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.20075

Abstract

Kualanamu Airport railway transportation has yet to become the public's leading choice for commuting to Kualanamu Airport because, according to the public, the rates set are still relatively expensive. So, further research is needed on the level of passenger satisfaction, ability to pay (ATP), and willingness to pay (WTP) so that tariffs can be determined according to people's ability and willingness to pay. The method used in this research includes distributing questionnaires and interviews using stated preference techniques. The methods used in this research are the importance-performance analysis (IPA) method and the household budget method. The main priority for the level of satisfaction that needs to be improved is the attribute in quadrant 1 (A), namely the time interval between Kualanamu Airport train, Kualanamu Airport train operational schedules, and Kualanamu Airport train ticket prices. The ability to pay (ATP) for train users at Kualanamu Airport is IDR 79,000. Willingness to pay (WTP) from Kualanamu Airport train users is IDR 49,000.
The Effect of Bar Diameter on Bond Stress of Geopolymer Concrete with Pull-out Test Ashara, Khansa Fadilah; Piscesa, Bambang; Tajunnisa, Yuyun
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.17769

Abstract

Geopolymer concrete, an eco-friendly alternative, employs silica, alumina, and alkaline activators. While wet mixing has been extensively studied, its limitations, such as impracticality, quick setting, and low workability, are overcome by the dry mixing method. Study by previous research is limited only to compressive strength, flexural strength, and shrinkage. However, research on bond strength, crucial for concrete-reinforcement adhesion, is limited. This study investigates bond strength through pull-out tests using consistent concrete materials, including Type C fly ash, 12M NaOH, and an alkali ratio of 1:1. Specimens with varying reinforcement diameters (D10, D12, D16) and additional transverse reinforcement (f6-150) were tested. Bond stress averages at D10, D12, and D16 are 25.80 MPa, 25.36 MPa, and 24.25 MPa. Reinforcement diameter directly influences bond strength, with larger diameters yielding greater bond stress.
User Satisfaction in Jak Lingko Mikrotrans Operations Palamba, Widsri Lai Lai; Widyastuti, Hera
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.20083

Abstract

Mikrotrans is a means of transit that supports Transjakarta buses and serves residential neighbourhoods. However, travellers have lodged several concerns about the mikrotrans service's facilities and infrastructure. These concerns include drivers failing to stop at bus stops, drivers driving at excessive speeds, facility damage, inconvenient passenger wait periods, and a lack of bus arrival information. Aside from that, the bus stop lacks operational information, the bus stop pole is damaged, and the distance between bus stops varies. Using the customer satisfaction index approach and IPA-Kano integration, this study examines the operational performance of the Jak Lingko mikrotrans in terms of user satisfaction. The research findings revealed a 71,61% user satisfaction index in the satisfied group. However, all assessment attributes have negative gap values, resulting in a satisfaction score that fails to match user expectations. Based on the IPA-Kano integration analysis, three fatal category qualities were identified as high priority for service improvement. The fatal category attribute is that the driver drives the vehicle if the passenger is seated and/or both of the passenger's feet have touched the ground (A7), the vehicle's stopping time is adjusted to coincide with the completion of the passenger boarding and alighting process (A14), and there is signage, route information boards, the bus name, and the bus stop number (A22).
Environmental Social Governance (ESG) Framework for Public Private Partnership (PPP) in Indonesia Wardhana, Yuki Mahardhito Adhitya
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.19620

Abstract

Environmental and social risks are risks that can disrupt the sustainability of infrastructure provision through the PPP scheme. PPP is a cooperation scheme involving many stakeholders and each stakeholder can be part of mitigating risks, including environmental risks. Environmental risk mitigation can be carried out through instruments and frameworks owned by each stakeholder. This research aims to map the ESG framework that exists in PPP schemes in Indonesia based on existing instruments for stakeholders to be able to make ESG an effective instrument for mitigating environmental and social risks. The research method used in this research is qualitative because the analysis used in this research is a descriptive and in-depth observation of the PPP ecosystem in Indonesia. The results of this research show that there are eight stakeholders in PPP in Indonesia. Each stakeholder has an instrument and can apply the ESG framework based on the instrument they have. Implementing the ESG framework can mitigate environmental and social risks in business processes carried out by stakeholders in the PPP ecosystem in Indonesia.
Urban Drainage System Simulation Using 1D Model, Case Study: North Kembangan Drainage System, Jakarta Putra, Rayhan Airlangga Wijanarko; Damarnegara, Satria; Savitri, Yang Ratri
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.20311

Abstract

Jakarta has a high level of urbanization, which causes land use changes and increasing inundation problems. One area that has experienced inundation is North Kembangan with a height of 20 - 30 cm in recent years and so of that the location is included in flood-prone sub-districts. Accordingly, a study is needed to estimate the North Kembangan drainage system actual conditions using the rainfall-runoff transformation model. This study simulates using the Storm Water Management Model (SWMM), and the calibration validation process is accomplished using the Nash-Sutcliffe model efficiency coefficient (NSE) and root mean square error (RMSE) method to evaluate the reliability of the model. The calibration for several model parameters is required to obtain the reliability model, including the channel Manning coefficient, land overflow Manning coefficient, and curve number. The calibration result shows that NSE values are 0,65, and the RMSE is 0,051 based on data in 2021. Then the validation result shows the NSE is 0,62 and RMSE is 0,040 based on data in 2022.
Application of Non-Linear Fiber Section Model on Spun Piles With and Without Concrete Infill Subjected to Cyclic Loading Apriliana, Estu Ema; Irawan, Candra; Suprobo, Priyo
Journal of Civil Engineering Vol 39, No 1 (2024)
Publisher : Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j20861206.v39i1.19812

Abstract

This numerical analysis study predicts the behavior of spun piles with and without concrete infill under cyclic flexural loading and constant axial load. A fiber section using STKO pre- and post-processor for the OpenSEES program was employed. Spun piles were modeled using displacement-based beam-column elements with distributed plasticity and cyclic loading procedures with displacement control. The numerical method proposed for this research was verified by comparing it to reliable experimental results.

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