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http://dx.doi.org/10.7734/COSEIK.2020.33.6.427

Analytical Study on Structural Behaviors of Post-Tensioned Column-Base Connections for Steel Modular Structures  

Choi, Kyung-Suk (Research & Development Institute, LOTTE Engineering & Construction)
Shin, Dong-Hyeon (Department of Architectural Engineering, University of Seoul)
Kim, Hyung-Joon (Department of Architectural Engineering, University of Seoul)
Publication Information
Journal of the Computational Structural Engineering Institute of Korea / v.33, no.6, 2020 , pp. 427-435 More about this Journal
Abstract
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.
Keywords
steel modular structure; post-tensioned column-base connection; finite element method (FEM); cyclic behavior;
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