Influence of near-fault velocity pulse on the seismic response of high temperature gas cooled reactor nuclear power plant

To find out the effect of the velocity pulse of near-fault ground motions on the structural shock resistance, we simulated the seismic responses using three dimensional finite element model for high temperature gas-cooled reactor nuclear power plant, in which four strong motion records with the velocity pulse and the corresponding synthetic time histories with same response spectra and without velocity pulse were used as ground motion inputs. Our test results show that the seismic responses of the high temperature gas cooled reactor nuclear power plant to ground motions with velocity pulse are greater than those without velocity pulse, and the ground motions with velocity pulse can have strong unfavorable effect on seismic displacement responses of the high temperature gas-cooled reactor nuclear power plant. If the installed equipment is sensitive to the displacement response, the designers should focus great concern on the effect of the velocity pulse on seismic displacement responses of the high temperature gas cooled reactor nuclear power plant.