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Response spectra for nuclear structures on rock sites considering the near-fault directivity effect

Earthquake Engineering and Engineering Vibration 2010年第3期9卷 357-365页

作者： Xu Longjun Yang Shengchao Xie Lili Department of Civil Engineering Harbin Institute of Technology at Weihai Weihai 264209 China CCCC Highway and Bridge Consultants Co. Ltd. Beijing 100029 China

Near-fault ground motions, potentially with large amplitude and typical velocity pulses, may significantly impact the performance of a wide range of structures. The current study is aimed at evaluating the safety implications of the near-fault effect on nuclear power plant facilities designed according to the Chinese code. To this end, a set of near- fault ground motions at rock sites with typical forward-directivity effect is examined with special emphasis on several key parameters and response spectra. Spectral comparison of the selected records with the Chinese and other code design spectra was conducted. The bi-normalized response spectra in terms of different comer periods are utilized to derive nuclear design spectra. It is concluded that nuclear design spectra on rock sites derived from typical rupture directivity records are significantly influenced both by the earthquake magnitude and the rupture distance. The nuclear design spectra specified in the code needs to be adjusted to reflect the near-fault directivity effect of large earthquakes.

关键词： near-fault ground motion directivity response spectrum rock site nuclear design

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Cursory seismic drift assessment for buildings in moderate seismicity regions

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Earthquake Engineering and Engineering Vibration 2007年第1期6卷 85-97页

作者：朱勇 R．K．L．Su 周福霖 Earthquake Engineering Research Test Centre and Key Lab of Earthquake Engineering and Application Technology of Guangdong Province Guangzhou University Department of Civil Engineering The University of Hong Kong

This paper outlines a methodology to assess the seismic drift of reinforced concrete buildings with limited structural and geotechnical information. Based on the latest and the most advanced research on predicting potential near-field and far field earthquakes affecting Hong Kong, the engineering response spectra for both rock and soil sites are derived. A new step-by-step procedure for displacement-based seismic hazard assessment of building structures is proposed to determine the maximum inter-storey drift demand for reinforced concrete buildings. The primary information required for this assessment is only the depth of the soft soil above bedrock and the height of the building. This procedure is further extended to assess the maximum chord rotation angle demand for the coupling beam of coupled shear wall or frame wall structures, which may be very critical when subjected to earthquake forces. An example is provided to illustrate calibration of the assessment procedure by using actual engineering structural models.

关键词： seismic hazard assessment response spectrum soil site rock site displacement-based inter-storey drift coupling beams chord rotation angle

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