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Earthquakes and Structures Volume 15, Number 3, September 2018, pages 295-306 DOI: http://dx.doi.org/10.12989/eas.2018.15.3.295 |
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The capacity loss of a RCC building under mainshock-aftershock seismic sequences |
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Chang-Hai Zhai, Zhi Zheng, Shuang Li and Xiaolan Pan
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| Abstract | ||
| Reinforced concrete containment (RCC) building has long been considered as the last barrier for keeping the radiation from leaking into the environment. It is important to quantify the performance of these structures and facilities considering extreme conditions. However, the preceding research on evaluating nuclear power plant (NPP) structures, particularly considering mainshock-aftershock seismic sequences, is deficient. Therefore, this manuscript serves to investigate the seismic fragility of a typical RCC building subjected to mainshock-aftershock seismic sequences. The implementation of the fragility assessment has been performed based on the incremental dynamic analysis (IDA) method. A lumped mass RCC model considering the tri-linear skeleton curve and the maximum point-oriented hysteretic rule is employed for IDA analyses. The results indicate that the seismic capacity of the RCC building would be overestimated without taking into account the mainshock-aftershock effects. It is also found that the seismic capacity of the RCC building decreases with the increase of the relative intensity of aftershock ground motions to mainshock ground motions. In addition, the effects of artificial mainshockaftershock ground motions generated from the repeated and randomized approaches and the polarity of the aftershock with respect to the mainshock on the evaluation of the RCC are also researched, respectively. | ||
| Key Words | ||
| reinforced concrete containment building; mainshock-aftershock effects; fragility assessment; HCLPF capacity; IDA | ||
| Address | ||
| Chang-Hai Zhai: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Heilongjiang, Harbin, 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China Zhi Zheng: College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China Shuang Li: School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China; Key Lab of Structures Dynamic Behavior and Control (Harbin Institute of Technology), Ministry of Education, Heilongjiang, Harbin, 150090, China; Key Lab of Smart Prevention and Mitigation of Civil Engineering Disasters of the Ministry of Industry and Information Technology, Harbin Institute of Technology, Harbin 150090, China Xiaolan Pan: College of Architecture and Civil Engineering, Taiyuan University of Technology, Taiyuan 030024, China | ||