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Steel and Composite Structures Volume 46, Number 2, January25 2023 , pages 221-236 DOI: https://doi.org/10.12989/scs.2023.46.2.221 |
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Seismic response of steel reinforced concrete frame-bent plant of CAP1400 nuclear power plant considering the high-mode vibration |
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Biao Liu, Zhengzhong Wang, Bo Zhang, Ningjun Du, Mingxia Gao and Guoliang Bai
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| Abstract | ||
| In order to study the seismic response of the main plant of steel reinforced concrete (SRC) structure of the CAP1400 nuclear power plant under the influence of different high-mode vibration, the 1/7 model structure was manufactured and its dynamic characteristics was tested. Secondly, the finite element model of SRC frame-bent structure was established, the seismic response was analyzed by mode-superposition response spectrum method. Taking the combination result of the 500 vibration modes as the standard, the error of the base reactions, inter-story drift, bending moment and shear of different modes were calculated. Then, based on the results, the influence of high-mode vibration on the seismic response of the SRC frame-bent structure of the main plant was analyzed. The results show that when the 34 vibration modes were intercepted, the mass participation coefficient of the vertical and horizontal vibration mode was above 90%, which can meet the requirements of design code. There is a large error between the seismic response calculated by the 34 and 500 vibration modes, and the error decreases as the number of modes increases. When 60 modes were selected, the error can be reduced to about 1%. The error of the maximum bottom moment of the bottom column appeared in the position of the bent column. Finally, according to the characteristics of the seismic influence coefficient aj of each mode, the mode contribution coefficient yj.Xji was defined to reflect the contribution of each mode to the seismic action. | ||
| Key Words | ||
| high-mode vibration; nuclear power plant; response spectrum method; seismic action; SRC frame-bent structure | ||
| Address | ||
| Biao Liu:1)College of Water Resources and Architectural Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi Province, P.R. China 2)Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas, Ministry of Education, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi Province, P.R. China Zhengzhong Wang, Bo Zhang and Mingxia Gao:College of Water Resources and Architectural Engineering, Northwest A&F University, No. 22 Xinong Road, Yangling, Shaanxi Province, P.R. China School of Civil Engineering and Architecture, Xi'an University of Technology, No. 5 Jinhua South Road, Xi'an, Shaanxi Province, P.R. China Guoliang Bai:School of Civil Engineering, Xi'an University of Architecture & Technology, No. 13 Yanta Road, Xi'an, Shaanxi Province, P.R. China | ||