Near-Fault Directivity Spectrum for Nuclear Structure Design on Rock Site
This study is aimed at evaluating the safety implications of near-fault directivity effect on nuclear structure and facilities designed according to the Chinese code. To this end, a set of near-fault ground motions at rock site with typical forward-directivity effect is examined with emphasis on several key parameters and response spectra. The bi-normalized response spectra in terms of different corner periods are utilized to derive nuclear design spectra. It was concluded that nuclear design spectra on rock site derived from typical directivity records are significantly influenced by both magnitude and distance. The nuclear design spectra specified in the code need to be adjusted to reflect the near-fault directivity effect of large earthquakes.
Chaohe Chen, Yong Huang and Guangfan Li
L. J. Xu and S. C. Yang, "Near-Fault Directivity Spectrum for Nuclear Structure Design on Rock Site", Advanced Materials Research, Vols. 243-249, pp. 3820-3823, 2011