Dynamic Nonlinear Time-History Analysis of Nuclear Power Plant under Near-Fault Ground Motion with Velocity Pulse

摘要

In order to discuss the structural characteristics and seismic performance of high temperature gas-cooled reactor nuclear power plant (HTGR-NPP) under near-fault ground motions with velocity pulse, we established three-dimensional nonlinear model and carried out the numerical calculation of modal frequency and dynamic time history analyses. We simulated the seismic responses of the model, in which four strong motion records with velocity pulse and the corresponding synthetic time histories with same response spectra and without velocity pulse were used as ground motion inputs. The acceleration, displacement time history, and floor response spectrum of nuclear power plant model were analyzed. Our test results show that ground motions with velocity pulse can make strong disadvantageous influence on seismic displacement responses of HTGR-NPP. This research can provide scientific reference and technology support for building HTGR-NPP in near-fault areas.