• Journal of the Korea institute for structural maintenance and inspection
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• v.21 no.2
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• pp.69-77
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• 2017

By producing pre-engineered modular system in the factory, It is enable to expedite construction and can be distinguished from two types by the method resisting load. One is the open-sided modular system composed of beams and columns. The other is enclosed modular system composed of panels and studs. Of the modular systems, the open-sided modular system buildings the connection between modules are difficult due to closed member sections, and the overall strength is reduced as a result of local buckling. In this study, in order to solve these problems, a modular system with folded steel members filled with concrete are proposed. The capacity spectrum method presented in ATC 40 is used for seismic performance assessment of the proposed model structure and the structure with conventional steel members. The analysis results show that at the performance point of each model the number and rotation of plastic hinge formed in the proposed modular system are smaller than those in the conventional system. Based on this observation it is concluded that the proposed system with composite sections has superior seismic capacity compared with conventional system.

• Journal of the Korea institute for structural maintenance and inspection
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• v.22 no.2
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• pp.105-114
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• 2018

Modular system can be divided into two types based on the methods of resisting load. The one is the open-sided modular system composed of beams and columns. The other is the enclosed modular system composed of panels and studs. Of the Modular systems, the use of open-sided modular system is limited because it consists of closed member sections. In order to solve this problem, Choi et al.(2017) proposed a composite modular system with folded steel members filled with concrete. However, it was assumed in the previous study that the connections between modules are composed of rigid joint. Therefore it didn't identify the effect of connection behavior in structure. This study used finite element analysis to calculate stiffness of the connections in the proposed modular system. The linearization method presented in FEMA 440 is used for seismic performance assessment of structures, considering the connection stiffness computed in this study. The result of analysis shows that the capacity and story drift ratio obtained in the model considering stiffness of connection are less than those in the model not considering connection stiffness. Based on this observation, it is concluded that the stiffness of connection has a considerable effect on structural behavior.

• Journal of the Korea institute for structural maintenance and inspection
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• v.23 no.1
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• pp.9-18
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• 2019

Modular system can be divided into two types based on the methods of resisting load. The one is the open-sided modular system composed of beams and columns. The other is the enclosed modular system composed of panels and studs. Of the Modular systems, the use of open-sided modular system is limited because it consists of closed member sections. In order to solve this problem, Choi et al.(2017) proposed a composite modular system with folded steel members filled with concrete. However, it was assumed in the previous study that the connections between modules are composed of rigid joint. Therefore it didn't identify the effect of connection behavior in structure. This study used finite element analysis to calculate stiffness of the connections in the proposed modular system. The linearization method presented in FEMA 440 is used for seismic performance assessment of structures, considering the connection stiffness computed in this study. The result of analysis shows that the capacity and story drift ratio obtained in the model considering stiffness of connection are less than those in the model not considering connection stiffness. Based on this observation, it is concluded that the stiffness of connection has a considerable effect on structural behavior.

• Proceedings of the Korean Society of Computer Information Conference
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• 2008.06a
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• pp.225-230
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• 2008

방대한 양의 분산 멀티미디어 자원에 대한 액세스를 제공하는 하이퍼미디어 기능을 사용한 IPTV의 성공은 영상 정보 관리 시스템의 구성요소로써 IPTV의 영상 정보 검색의 효율성 제고 및 성능향상을 제공한다. 그러나 본 논문에서는 현존하는 하이퍼미디어 시스템에 거의 없는 필요한 모든 기능을 제공하는 방법을 보였다. 개방형 분산 멀티미디어 자원 통합 모델의 모든 기능을 제공해주기 위하여 개방형 분산 하이퍼미디어 시스템 타입의 IPTV 정보 계층 구조와 양질의 서비스 계층을 통하여 융통성 있고 확장 가능한 분산 멀티미디어 정보 시스템이 개발될 수 있는 범위 내의 모듈러 프레임워크(modular framework)로써 행동하도록 설계되었다. 개방형 분산 하이퍼미디어 프레임워크 모델은 QoS 제공을 위하여 이질적인 분산 멀티미디어 자원 통합의 하이퍼미디어 프레임워크 모델을 하이퍼미디어 세션과 함께 제시함으로써 넓게 분산되어 있는 자원에 대하여 투명하게 접근할 수 있는 방법을 제시하였다.

• Proceedings of the Korean Information Science Society Conference
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• 1998.10a
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• pp.665-667
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• 1998

방대한 양의 분산 멀티미디어 자원에 대한 엑세스를 제공하는 하이퍼미디어 기능을 사용한 WWW의 성공은 정보관리 시스템의 구성요소로써 하이퍼미디어 항해자의 실행 가능성에 대한 확고한 증거를 제공한다. 그러나 논 논문에서는 현존하는 하이퍼미디어 시스템에 거의 없는 필요한 모든 기능을 제공하는 방법을 보였다. 개방형 분산 멀티미디어 자원 통합 모델의모든 기능을 제공해 주기 위하여 개방형 분산 하이퍼미디어 계층의 프리젠테이션 계층과 양질의 서비스 계층을 통하여 융통성 있고 확장 가능한 분산 멀티미디어 정보 시스템이 개발될 수 있는 범위 내의 모듈러 프레임워크(modular framework)로써 행동하도록 설계되었다. 개방형 분산 하이퍼 미디어 프레임 워크 모델은 QoS(Quality of Service)제공을 위하여 이질적인 분산 멀티미디어 자원 통합의 하이퍼미디어 프레임워크 모델을 하이퍼미디어 세션과 함께 제시함으로써 넓게 분산되어 있는 자원에 대하여 투명하게 접근할 수 있는 방법을 제시하였다.

• Journal of Korean Society of Steel Construction
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• v.27 no.5
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• pp.471-481
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• 2015

Modular building is a prefabricated construction system for building where factory-produced pre-engineered modular units are delivered to site and assembled as substantial elements of a building. There are two basic kinds of modular structures. One is a load-bearing wall structure designed to transfer the load through longitudinal walls. The other is a frame structure composed of columns and beams. For frame structure, square hollow section is often used as a column member and channel as a beam member in modular unit. Lower and upper modules are fasten with bolts via a pre-installed access hole in the SHS column. However, the access holes can weaken the panel zone that would affect the behavior of beam to column connection. The 5 specimens of beam to column connections with parameters of access hole, column thickness and diaphragm were made and this paper describes the test results.