• Korean Journal of Construction Engineering and Management
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• v.21 no.3
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• pp.76-84
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• 2020

The rate of application of the modular plant in the plant industry is increasing, and for the success of the modularization projects, it is essential to develop and implement a systemized methodology across all phases of the project. However, Korean EPC firms lack project management capability when it comes to apply standardized methodology. Therefore, it is important to establish and systematize the cost/schedule integrated management method which are the two core elements of project management technology. This study was conducted to develop a methodology and guidelines for integrated management process for modular plant projects. The researchers developed a methodology for planning and managing cost and schedule, and integrated by module unit. Integrated cost and schedule methodology and guidelines developed can be used for various EPC modular plant projects to enhance the efficiency of project management.

• Journal of Korean Society of Steel Construction
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• v.29 no.5
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• pp.331-340
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• 2017

This study was performed in order to develop of the new modular construction system. For the modular construction method that is currently applied in the country, it is very expensive in terms of material costs and fire resistance because it uses only the steel C-type beam. In order to overcome this, and the practical application of new steel-PC hybrid module construction system. Improvement and development of the cross-section of the structural beam member in order to be carried out first. An experiment was carried out by making three specimens. Experiment result, the composite beam was dominated by the horizontal shear failure. It was evaluated through a nonlinear analysis and experimental & theoretical for the structural performance the composite beam member.

• Proceeding of Spring/Autumn Annual Conference of KHA
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• 2011.04a
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• pp.75-80
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• 2011

The Ministry of Land, Transport and Maritime Affairs has announced a policy which could enable the building of urban type housing using a prefabrication method in 2010. However, it may possibly be at standstill owing to the prefabrication methodology has not been currently developed in Korea. Moreover, small households of one or two family members are been steadily increasing, but small housing in which they reside has been decreasing. Because of this situation, the urban type housing has been proposed. To expand the propagation of this urban type house and to promote the prefabrication method, the first-priority project is to develop a technology that is able to reduce the construction costs, as well as to shorten the construction period. Considering this prefabrication system as an avenue to be able to solve these problems, a series of systems and policies for fostering prefabricated urban type housing has been proposed. This study is to review a series of methods, technologies and policies that are required for urban type housing and henceforth, to utilize them as preliminary data for prefabricated urban type housing.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.25 no.4
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• pp.307-314
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• 2012

IFC-based representation method of part library for superstructure module of modular steel bridge is proposed. The library is capable of efficiently offering and exchanging part information in process of manufacture, assembly, design, and construction of modular steel bridge. Entities, representing physical part information in IFC model, are matched semantically with parts of the superstructure module for representation of part information with IFC model. Either types of matched entities are applied in order to verify the role of each part, or new types are defined as a user-defined types. In addition, assembly system has been classified and defined into 4 levels of LoD(Level of Detail) to provide appropriate part information efficiently from the part library in each step of the process. Then, new property is defined for representing the LoD information with IFC Model. Finally, IFC-based test library of modular steel bridge is generated by applying the matched entities and entity types to the actual the superstructure module of modular steel bridge.

• Journal of the Computational Structural Engineering Institute of Korea
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• v.33 no.6
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• pp.427-435
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• 2020

Modular structures are relatively lightweight compared to reinforced-concrete or steel structures. However, it is difficult to achieve structural integrity between the columns of unit modules in a modular structure, which causes undesirable effects on the lateral force resistance capacity against wind and earthquake loads. This is more prominent in modular structures whose overall heights are greater. Hence, a post-tensioned modular structural system is proposed herein to improve the lateral force resistance capacity of a typical modular structure. A post-tensioned column-base connection, which is the main component of the proposed modular structural system, is configured with shapes and characteristics that allow inducing self-centering behaviors. Finite element analysis was then performed to investigate the hysteretic behaviors of the post-tensioned column-base connection. The analysis results show that the hysteretic behaviors are significantly affected by the initial tension forces and beam-column connection details at the base.

• Journal of the Architectural Institute of Korea Structure & Construction
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• v.34 no.3
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• pp.19-28
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• 2018

Key factors that ensure competitiveness of modular unit include consistent high quality and connection condition that ensures high structural performance while minimizing the overall scale of the on-site process. However, it is difficult to evaluate the structural performance of the connection of modular unit, and its structural analysis and design method can be different depending on the connection to its development, which affects the seismic performance of its final design. In particular, securing the seismic performance is the key to designing modular systems of mid-to-high-rise structure. In this paper, therefore, the seismic performance of the modular system with bracket-typed fully restrained moment connections according to stiffness and the shapes of various connection members was evaluated through experimental and analytical methods. To verify the seismic performance, a cyclic loading test of the connection joint of the proposed modular system was conducted. As a result of this study, theoretical values and experimental results were compared with the initial stiffness, hysteresis behavior and maximum bending moment of the modular system. Also, the connection joint was modeled, using the commercial program ANSYS, which was then followed by finite element analysis of the system. According to the results of the experiment, the maximum resisting force of the proposed connection exceeded the theoretical parameters, which indicated that a rigid joint structural performance could be secured. These results almost satisfied the criteria for connection bending strength of special moment frame listed on KBC2016.

• Journal of the Korean housing association
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• v.22 no.5
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• pp.101-110
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• 2011

The Ministry of Land, Transport and Maritime Affairs has announced a policy which can enable the building of urban type housing with the use of a prefabrication method 2010. However, such may possibly be at standstill owing to the prefabrication methodology that has not been currently developed in Korea. Moreover, small households of consisting of one or two family members have been steadily increasing, but the small housing units in which they reside has been decreasing. Due to this situation, urban type housing has been proposed. To expand the propagation of such urban type housing and to promote prefabrication methods, the top priority project is to develop a technology that is able to reduce construction costs, as well as to shorten the actual construction period. In consideration of this prefabrication system for an avenue to solve such problems, a series of systems and policies for the fostering of prefabricated urban type housing has been proposed. This study is to review a series of methods, technologies and policies that are required for such urban type housing and henceforth, to utilize such as preliminary data for further prefabricated urban type housing.

• Journal of Internet Computing and Services
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• v.17 no.4
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• pp.87-93
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• 2016

Since aging population in Korea is rapidly progressing, the need for improving the life quality of the elderly has been increasing. Accordingly, in order to respond in a residential environment improvement and behavior change for the elderly, architecture design and construction methods have become converted into a modular construction method and various IT systems for the elderly have been proposed. Unlike current residential design techniques for the elderly in which architectural design techniques are performed separately with IT system design, the methodology for converging architectural design techniques with IT has not been discussed and proposed. Therefore, this paper extensively studies about requirements for converging architectural design techniques with IT such as elderly behavior, residential IT Service plan factor analysis, and residential modular construction method including IT services.

• Steel and Composite Structures
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• v.37 no.3
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• pp.273-289
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• 2020

Due to the unique construction method of modular steel buildings (MSBs) with units prefabricated fully off the site and assembled quickly on the site, the inter-module connection for easy operation and overall performance of the system were key issues. However, it was a lack of relevant research on the system-level performance of MSBs. This study investigated the seismic performance of two-storey modular steel structure with a proposed vertical rotary inter-module connection. Three full-scale quasi-static tests, with and without corrugated steel plate and its combination, were carried out to evaluate and compare their seismic behaviour. The hysteretic performance, skeleton curves, ductile performance, stiffness degradation, energy dissipation capacity, and deformation pattern were clarified. The results showed that good ductility and plastic deformation ability of such modular steel structures. Two lateral-force resistance mechanisms with different layout combinations were also discussed in detail. The corrugated steel plate could significantly improve the lateral stiffness and bearing capacity of the modular steel structure. The cooperative working mechanism of modules and inter-module connections was further analyzed. When the lateral stiffness of upper and lower modular structures was close, limited bending moment transfer may be considered for the inter-module connection. While a large lateral stiffness difference existed initially between the upper and lower structures, an obvious gap occurred at the inter-module connection, and this gap may significantly influence the bending moments transferred by the inter-module connections. Meanwhile, several design recommendations of inter-module connections were also given for the application of MSBs.

• Journal of the Korean Geosynthetics Society
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• v.4 no.4
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• pp.47-56
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• 2005

With the need of efficient site use retaining walls have frequently used. Of them dry cast modular block wall(MBW), in which geogrid and concrete block are used is getting popular because of its simplicity and economical efficiency of construction. However, since this method is based on the theory of earth pressure, sands with good quality should be used. In contrast, reinforced soil slope(RSS) that the slope is less than $70^{\circ}$ can use wider range of soil than MBW. A hybrid reinforced geo-structure might be a good alternative in view of overcoming difficulty obtaining soils with good quality as well as maximizing the efficiency of site use. This method is composed of reinforced block wall and reinforced soil slope. In this method, reinforced block wall is constructed up to a certain height vertically at ground boundary first. Reinforced soil slope is then constructed on the block wall subsequently. This paper introduces several technical points that should be taken into account in design and construction.