| Title |
Cyclic Loading Test and an Analytical Evaluation of the Modular System with Bracket-typed Fully Restrained Moment Connections |
| Authors |
Park, Jae-Seong ; Kang, Chang-Hoon ; Shon, Su-Deok ; Lee, Seung-Jae |
| DOI |
https://doi.org/10.5659/JAIK_SC.2018.34.3.19 |
| Keywords |
Middle-storied modular system ; Ceiling bracket ; Cyclic loading test ; Seismic performance ; Beam-column connection ; Special moment building ; Nonlinear finite element analysis |
| Abstract |
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. |