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Steel and Composite Structures Volume 36, Number 1, July 10 2020 , pages 17-29 DOI: https://doi.org/10.12989/scs.2020.36.1.017 |
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Seismic behavior of steel cabinets considering nonlinear connections and site-response effects |
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Thanh-Tuan Tran, Phu-Cuong Nguyen, Gihwan So and Dookie Kim
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| Abstract | ||
| This paper presents experimental and numerical studies on the seismic responses of the steel cabinet facility considering the nonlinear behavior of connections and site-response effects. Three finite element (FE) models with differences of type and number of connections between steel plates and frame members have been developed to demonstrate adequately dynamic responses of structures. The screw connections with the bilinear force-deformation relationship are proposed to represent the inelastic behavior of the cabinet. The experiment is carried out to provide a verification with improved FE models. It shows that the natural frequencies of the cabinet are sensitive to the plate and frame connectors. The screw connections reduce the free vibration compared to the weld one, with decreased values of 2.82% and 4.87% corresponding to front-to-back and side-to-side directions. Additionally, the seismic responses are investigated for various geological configurations. Input time histories are generated so that their response spectrums are compatible with a required response spectrum via the time-domain spectral matching. The results indicate that both site effects and nonlinear behavior of connections affect greatly on the seismic response of structures. | ||
| Key Words | ||
| cabinet facility; site-response effect; nonlinear connection; steel structures; spectral matching; required response spectrum | ||
| Address | ||
| Thanh-Tuan Tran: Institute of Offshore Wind Energy, Kunsan National University, 558 Daehak-ro, Gunsan-si 54150, Republic of Korea; Faculty of Technology and Technique, Quy Nhon University, 170 An Duong Vuong, Quy Nhon city, Binh Dinh, Vietnam; Phu-Cuong Nguyen: Faculty of Civil Engineering, Ho Chi Minh City Open University, 97 Vo Van Tan, Ho Chi; Gihwan So: Innose Tech Company, 30 Mirae-ro, Incheon, Republic of Korea; Dookie Kim: Department of Civil and Environmental Engineering, Kongju National University, 1223-24 Cheonan-daero, Seobuk-gu,Cheonan-si, Chungcheongnam-do 31080, Republic of Korea | ||