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Title |
Seismic Performance Assessment of a Composite Modular System Considering Stiffness of Connections
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Authors |
최영후(Young-Hoo Choi) ; 이호찬(Ho-Chan Lee) ; 김진구(Jin-Koo Kim) |
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DOI |
https://doi.org/10.11112/jksmi.2019.23.1.9 |
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Keywords |
합성 모듈러 시스템 ; 접합부 ; 유한요소해석 ; 선형화방법 Composite modular system ; Connection stiffness ; Finite Element Analysis ; Seismic performance |
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Abstract |
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.
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