• Journal of KIBIM
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• v.6 no.3
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• pp.34-41
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• 2016

The previous studies argue that using the semantic properties of BIM objects is efficient for simulating the behaviors of autonomous, computer agents, called virtual-users, but such assumption is not proven via evidence-based research approaches. Hence, this present study aims to investigate the empirical effects of a human behavior simulation model equipped the semantics of spaces on the architecture-major students' operation and understanding of the simulation system, compared to a typical path-finding model. To achieve the aim, this study analyzed the survey and interview data, collected in the authentic design projects. The analysis indicates that (1) using a simulation model equipped the semantics of spaces helps the students' operation of the simulation, and (2) it also aids understanding the relationship between the variables of spaces and virtual-users (${\alpha}=0.74$). In addition, the qualitative data inform that the advantages of the simulation model that computes the semantics of spaces stem in the automatic behavioral changes of massive numbers of virtual-users, and efficient detection and activation on the what-if situations. The analysis also reveals that the simulation model has shortcomings in orchestrating the complex data structure between the semantics properties of spaces and virtual-users under multi-sequential scenarios. The results of this study contribute to develop a future design system combining BIM with human behavior simulation.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.16 no.5
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• pp.3484-3490
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• 2015

Construction industry has a relatively higher accident rate compared to other industries, especially the serious accident rate including death. Ministry of Employment and Labor has not only implemented safety consciousness but also initiated the basic occupational safety and health training for the construction industry. Despite the effort, only a few sites follow the obligatory task and there are reports stating the effect of the education is minimal. As a result, this research aims to determine and analyze the current state of the basic occupational safety and health training including its lesson plan and method. Furthermore, by analyzing the preliminary study on the effective instructional method, this research suggests an effective method to implement safety consciousness to the workers. An improvement plan is also suggested by supplying appropriate educational material to different workers by differentiating the characteristics and the cause of death at various work types in construction sites.

• Journal of the Korea Institute of Building Construction
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• v.21 no.2
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• pp.165-174
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• 2021

The construction industry causes the most accidents and fatalities among all industries. Although many efforts have been made to reduce safety accidents in construction, the study on the lost workdays that return to work place is insufficient. Therefore, this study proposes a model that classifies the lost workdays lost into moderate and severity, and derives the importance of variable and analyzes important factors through the trained random forest model. We analyze the learning process of the random forest which is a black box model, and extracted important variables that impact on the severity of the lost workdays through the extracted feature importance. The factors existing inside were analyzed through the extracted variables. The purpose of this study is to analyze the accident case data at the construction site through a random forest model and to review variables that have a high impact on the lost workdays. In the future, this sutdy can apply to improve construction safety management and reduce the accident of industrial accidents.

• Korean Journal of Construction Engineering and Management
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• v.20 no.5
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• pp.31-41
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• 2019

The purpose of this study is to investigate the participation of vocational training program of construction engineers and the impact of workplace learning (formal learning and informal learning) on human resource performances of construction engineers. The data of 306 construction engineers were extracted from 10,069 workers in various industries those were collected by 6th human resource company panel survey done by Korea Research Institute of Vocational Education & Training. This study found that, compared with workers in other industries, participation rate of construction engineers in workplace learning (formal learning, informal learning) was relatively low, and especially the participation rate of informal learning was significantly low. Regression analysis showed that participation in formal learning did not affect positive job performance and job satisfaction. On the other hand, informal learning has a positive effect on job capability, job satisfaction, and organizational commitment.

• Journal of the Korea Institute of Building Construction
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• v.18 no.6
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• pp.585-594
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• 2018

Chinese construction corporations take more market shares in the global construction market. The performance of Chinese construction corporations need to be reviewed from the capability and qualification system of the engineers including supervision engineer. The purpose of this study is to analyze the characteristics of professional qualifications for supervision engineer in China. The research methodology is to investigate the qualification exam system, process and examination subjects for searching the fundamental body of knowledge about supervision engineer qualification. The results shows that the qualification system in supervision engineer are classified in detail for the body of knowledge and operated by the government. The qualification examination requires broad and defied knowledge structure together with practical experiences. The research results may lead further research subjects of Chinese construction related qualifications and education system in the ways of more specificity, expertise, and practicality. The mutual understanding of qualification system becomes major issue to build better collaboration in global market.

• Journal of the Korea Institute of Building Construction
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• v.19 no.4
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• pp.351-359
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• 2019

Recognizing that the fundamental cause of construction safety accidents was a lack of safety management activities in the planning and design phases, the government made the Design for Safety (DFS) system mandatory in May 2016. However, awareness among ordering parties and designers regarding this system is significantly low, and the system has not been properly established due to reasons such as the need for additional work and a lack of professional manpower. In this study, the awareness of ordering parties and designers of the DFS system was analyzed through a survey, various problems in DFS work execution were identified and measures for improvement were presented. Measures to improve the efficiency in DFS work execution involve the discovery of risk factors and establishment of countermeasures, and here the establishment of a DFS work support system that enables the sharing of information between institutions is the most urgent priority. In addition, it is also urgently necessary to establish a dedicated organization in charge of DFS work, cultivate professional manpower, develop the relevant education programs and establish a proper cost calculation standard for DFS work execution by design offices.

• Journal of the Korean Institute of Rural Architecture
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• v.23 no.1
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• pp.43-50
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• 2021

This study aims to investigate and analyze the utilization perception of members of head families based on a survey on the history, folklore, architectural resources of head families. In order to identify the direction of utilization of Jeonnam head family resources, tangible and intangible resources, and spaces and places to contain programs were researched. The results of the study were summarized as follows. 1) Head family houses in Jeonnam could be categorized into head families that preserved the original form of head family houses, head families that preserved a part of head family houses, head families that newly built head family houses while the original forms thereof have disappeared, and relocated head families of which eldest grandsons no longer reside, where only the sites of the head family houses remain or relocated to a different place. 2) In the case of perception of members of head families on the utilization of head family resources, 27 head families consented to the utilization, 35 head families opposed to the utilization, and 6 head families were undecided on the utilization out of a total of 68 head families. 3) The results of investigating and analyzing the desired type of programs of each head family by categorizing the programs into lodging, food, meditation, education, and tourism, as many as four programs were desired, while some families desired 2 or 3 programs at the lowest, showing an overlapping characteristic.

• Earthquakes and Structures
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• v.22 no.6
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• pp.625-635
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• 2022

High-rise buildings (HRBs) are considered one of the most common structures nowadays due to the population growth, especially in crowded towns. The lack of land in crowded cities has led to the convergence of the HRBs and the absence of any gaps between them, especially in lands with weak soil (e.g., liquefaction-prone soil), but then during earthquakes, these structures may be exposed to the risk of collision between them due to the large increase in the horizontal displacements, which may be destructive in some cases to the one or both of these adjacent buildings. To evaluate methods of reducing the risk of collision between adjacent twin HRBs, this research investigates three vibration control methods to reduce the risk of collision due to five different earthquakes for the case of two adjacent reinforced concrete (RC) twin high-rise buildings of 15 floors height without gap distance between them, founded on raft foundation supported on piles inside a liquefaction-prone soil. Contact pounding elements between the two buildings (distributed at all floor levels and at the raft foundation level) are used to make the impact strength between the two buildings realistic. The mitigation methods investigated are the base isolation, the tuned mass damper (TMD) method (using traditional TMDs), and the pounding tuned mass damper (PTMD) method (using PTMDs connected between the two buildings). The results show that the PTMD method between the two adjacent RC twin high-rise buildings is more efficient than the other two methods in mitigating the earthquake-induced pounding risk.

• Asia-pacific Journal of Multimedia Services Convergent with Art, Humanities, and Sociology
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• v.6 no.3
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• pp.413-422
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• 2016

A construction manager tries to complete a construction project within its duration and budget using available resources. Schedule networks such as Bar-chart and CPM(critical path method) are used to finish the project within the duration. A survey shows that small contractors prefer Microsoft Excel to commercial time management softwares to manage construction time in their fields, because the Excel is useful to control cost with schedule and few time management experts works in the small contractors. A college produces talented graduates who are able to manage time of a construction project. But the quality and quantity of college eduction for time management is insufficient. Another survey shows that majors in Architectural engineering of local national universities have the curriculum for time management, and teach mainly the theory of network scheduling and how to make the network schedule. The several majors have classes for the theory and exercise of commercial time management softwares in several majors. It is necessary to educate time management experts able to use Bar-chart and commercial time management softwares for the small contractors.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.29 no.3A
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• pp.217-225
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• 2009

Bridge design is a problem-solving process whose level of design quality strongly depends on how to relate design constraints with feasibile design objectives in conceptual design stage. This paper has focused on how to create bridge shapes using creativity toward better looking bridge appearances in conceptual design stage. The term creativity in this study does not refer to the creation of something from nothing but to the reorganization of existing concepts. Such creativity includes not only enlarging the number of structural forms which is established based on the relationship between form and statics but also combining bridge design with artistic components like an architectural style. Also, this study has investigated the usefulness of graphic statics as a structural analysis tool showing the analysis results visually to generate bridge forms in conceptual design stage. It is expected that the proposed way of generating bridge forms in this study to be used not only for practical purpose but also for educational purpose regarding the aesthetic bridge design serving as a new education paradigm.