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Korean Journal of Construction Engineering and Management

Korean Journal of Construction Engineering and Management

ISO Journal Title : Korean J. Constr. Eng. Manag.
Open Access Journal Bimonthly
  • ISSN (Print) : 2005-6095
  • ISSN (Online) : 2465-9703
Online Submission

Current Issue : Vol.25 No.5, 2024-09

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Delivery guideline composition and utilization plan for 4D CAD-based schedule management

Kang, HyoJeong ; Kang, Leenseok

https://dx.doi.org/10.6106/KJCEM.2024.25.5.003

Recently, both nationally and internationally, various BIM guidelines have been developed. These guidelines present fundamental principles and standards for the application of BIM. However, practical BIM guidelines for the schedule management area in the construction phase are lacking, making it difficult to apply them effectively in practical work settings. In this study, performance-based delivery guidelines are presented for the key functionalities of 4D CAD systems, which are representative BIM tools used in the construction phase. To achieve this, a survey analysis was conducted to determine the prioritization of these functionalities. Based on the characteristics of the project, delivery guidelines were formulated to allow users to selectively utilize the guidelines at different levels. Furthermore, practical ways to utilize performance-based delivery guidelines for schedule management using 4D CAD were proposed, validating the usability of these guidelines. The research findings suggest that these guidelines for BIM functionality in schedule management can hold practical significance as the utilization of BIM in construction phases continues to increase.

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Performance Evaluation of System Support Assembled with Reused Members

Park, Jun-Beom ; Jung, Wook ; Bae, Sung-Jae ; Kim, Chan-Jin ; Yoon, Sung-Hyun ; Yoon, Sang-Moon ; Kim, Young-Suk ; Kim, Jung-Yeol

https://dx.doi.org/10.6106/KJCEM.2024.25.5.015

System support is a facility that is temporarily installed to support vertical loads at construction sites, and is assembled and installed by reused individual members. These characteristics are likely to lead to poor performance of installed system supports, and even though it is institutionalized to check structural safety at the their design phase, accidents continue to occur at the construction site. Accordingly, safety management of system support is implemented through various institutional methods, but the current system does not consider the performance degradation of temporary facilities due to the reuse of individual temporary members. Therefore, the purpose of this study is to verify the performance of assembled system support. In order to do achieve this purpose, the authors divided individual system supports into unused and used groups and performed compression performance test with defined models assembled with those two groups of system supports. The results of this study are expected to be meaningful as a research case that can quantitatively evaluate safety systems and standards for the performance of existing temporary facilities and suggest directions for improving the safety management system of temporary facilities in the future.

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The Quantification of the Safety Accident of Foreign Workers in the Construction Sites

Kim, Ji-Myong

https://dx.doi.org/10.6106/KJCEM.2024.25.5.025

The purpose of this study is to propose a model development framework to predict the risk of safety accidents for foreign workers based on a deep learning algorithm for systematic safety management of foreign workers in the construction industry. Many past studies have shown that foreign workers working at construction sites are relatively more vulnerable to safety accidents than non-foreign workers, but quantitative research on the risk of safety accidents among foreign workers working at construction sites is lacking. Furthermore, due to a lack of predictive research on safety accidents, realistic and systematic safety management for foreign workers is not possible. Therefore, in order to complement this, this study proposes a deep learning algorithm-based model that collects, analyzes, and predicts safety accident data occurring at construction sites for systematic safety management of foreign workers at construction sites. The results and framework of this study can be used to analyze and predict various safety accident risks that occur at construction sites, and ultimately can serve as an important guideline for safety management of foreign workers at construction sites.

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A Study on the Properties and Mix Design of Eco-friendly Concrete Bricks Using Recycled Fine Aggregates

Choi, Hyungkook ; Yang, Sungchul ; Son, Jaeho ; Lee, Seunghyun

https://dx.doi.org/10.6106/KJCEM.2024.25.5.032

In the construction industry, lack of reliability in the quality of recycled aggregates, harmful substance problems, and negative consumer perceptions limit the expansion of the use of recycled aggregates. In this respect, existing studies mainly focus on the use of recycled coarse aggregates in concrete in consideration of durability. On the other hand, in the case of recycled fine aggregates, not only are there insufficient cases applied to major structures, but the scope of application is very limited due to lack of awareness. Therefore, the main purpose of this study is to present the possibility of their application in bearing and non-bearing wall structures through physical characteristics experiments of concrete bricks for masonry according to various mixing ratios of recycled fine aggregates and cement amounts. To this end, the compressive strength and absorption rate of concrete bricks were measured focusing on the mixing ratio of the recycled fine aggregate and the crushed fine aggregate and the amount of cement. As a result, it is found that it is possible to use 100% of recycled fine aggregate for 200㎏/㎥ of cement or 25% of crushed fine aggregate mixed with 75% of recycled fine aggregate for the same amount of cement to achieve the compressive strength of 13㎫, witch is one of the quality requirements for concrete bricks for bearing walls. In addition, it is found that to meet the strength of 8㎫, one of the quality requirements for non-bearing walls, it is sufficient to use 100% of the recycled fine aggregate for 100㎏/㎥ of cement. Through the absorption rate tests, it is also confirmed that the absorption rate of the concrete brick is 13% or less by meeting the required performance criteria. This means that even if recycled fine aggregate is used in the manufacture of concrete bricks, the quality standards required by KS F 4004 (concrete bricks) can be sufficiently met.

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Comparison of Raw Material Inventory Management Policies for a Precast Concrete Production Plant

Kwon, Hyeonju ; Jeon, Sangwon ; Lee, Jaeil ; Jeong, Keunchae

https://dx.doi.org/10.6106/KJCEM.2024.25.5.041

In this study, we compare and analyze the performance of three inventory management policies for raw material inventory management in a Precast Concrete production plant: Fixed Order Quantity Policy (FOQP), Fixed Order Interval Policy (FOIP), and (s, S) Ordering Policy (sSOP). In order to make more realistic conclusion, we developed and utilized the ARENA simulation model, a performance evaluation tool that considers the variance of raw material demand and supply for the entire production process in a PC production plant using multiple raw materials. For the three policies, reorder point, order quantity, target level, and order interval parameters were initialized by using Economic Order Quantity (EOQ) model and then optimized through OptQuest. As a result of optimization, inventory management costs were reduced by an average of 97.28% compared to the EOQ model that does not consider the variance of demand and supply. After setting three influencing factors, Project Occurrence Cycle (POC), Raw Material Lead-time (RML), and Unit Stock-out Cost (USC), a performance evaluation was conducted for the three policies. As a result of evaluation, the inventory management costs of FOQP and sSOP, which determine order intervals by considering inventory levels by real-time or daily, were 30.6% and 27.9% lower than FOIP with fixed order intervals respectively. In addition, inventory management costs were affected by RML and USC factors excluding POC, but the differences were 2.17% and 2.09% respectively, which were not large due to the optimization of parameters for responding the variance of raw material demand and supply.

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Analyzing Education/Training Status of Construction Field Engineers and Its Improvement Measures

Lee, Junyong ; Shin, Wonsang ; Son, Changbaek

https://dx.doi.org/10.6106/KJCEM.2024.25.5.055

The purpose of this study is to analyze the effectiveness and necessity of improvement for the currently implemented education and training in order to cultivate and secure excellent construction engineers of domestic construction companies, and to suggest future improvement measures. The conclusions obtained through this study are as follows. The overall satisfaction of construction engineers at the construction site was high, and it was found to be effective in improving job skills, but the educational content, educational methods, and educational environment need to be improved. In order to improve the educational content, it is urgent to introduce a practical-oriented educational curriculum to respond to technological development. In order to increase the educational effect of online education methods, it is very important to develop excellent educational content. In order to improve the educational environment, it is necessary to expand customized practice spaces, establish educational facilities by region, and operate shuttle buses.

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An Ontology-Based Analysis of Required COBie Data for Using BIM in Facility Management

Jeong, Hojeong ; Park, Byeongmin ; Jo, Seongbeom ; Yu, Chaeyeon ; Kim, Sungjin

https://dx.doi.org/10.6106/KJCEM.2024.25.5.063

This study aimed to address the issue that about 92% of domestic BIM orders only focus on the design/drafting stage and the absence of government BIM implementation guidelines for maintainers. Despite the ability of BIM to reduce maintenance LCC by around 20%, such guidelines remain insufficient. In this study, we examined the COBie requirements by comparing 45 maintenance information and Autodesk Revit (2022) inputs with COBie data. As a consequence, the necessary elements correlated with 54 pieces of data across eight spreadsheets (Contact, Space, Type, Component, System, Spare, Job, Document) and there were 13 gaps in information between the construction and maintenance. These were subsequently integrated into the ontology and their associations were evaluated with the Reasoner tool. From the results inferred, it is apparent that the COBie requirements have a correlation with one another. It is essential to carry out a survey among practitioners and a pilot operation to assess performance in the future. This research is anticipated to furnish pivotal data for the implementation of an effective property upkeep system.

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A Study on LCC Analysis by Floor Finishing Material to Reduce NOX in Urban Areas - Focusing on the photocatalytic pavement and cement pavement -

Bong, Jiwan ; Lee, Chanhee ; Choe, Suhyeon ; Kim, Han Soo ; Jeong, Kwangbok

https://dx.doi.org/10.6106/KJCEM.2024.25.5.073

In South Korea, NOX emissions are a major concern, leading to acid rain and smog, harming both the atmosphere and human health, particularly in urban areas. This study seeks to determine the most advantageous pavement material for NOX reduction in urban areas and assess whether photocatalytic pavement blocks, proven to reduce NOX emissions, can serve as a viable alternative to conventional cement pavement blocks. To achieve this, a comparative life cycle cost (LCC) analysis was conducted between photocatalytic pavement blocks and conventional cement pavement blocks installed for their NOX reduction capabilities. The cost-saving benefits of NOX reduction were monetized for photocatalytic pavement blocks. The analysis period was based on the least common multiple of the replacement cycles of both pavement materials: 30 years. The results revealed that while photocatalytic pavement blocks initially produce higher installation costs than cement pavement blocks, they offer greater cost savings in terms of total cost and net present value due to their NOX reduction effect over the life cycle. Additionally, the costsaving effects of photocatalytic pavement blocks are even more pronounced because their replacement period is 5 years longer than that of cement pavement blocks. This study holds significance in performing an LCC analysis of the previously unanalyzed photocatalytic pavement blocks while also demonstrating their potential as substitutes for cement pavement blocks.

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