Dynamic Time-History Analysis of Relay Frame’s Reconstructed Support of Daya Bay Nuclear Power Plant

For obtaining the stress response accurately of the Relay Frame’s Reconstructed Support of Daya Bay Nuclear Power Plant（NNP） under the horizontal and vertical seismic load,dynamic time-history method is used.The method considers the relative displacement between the top support and the bottom sup-port,which is applied by the worst-case combination.From the analysis results,the output and input transfer function is obtained,which can verify the analysis results and supply as a reference for the improvement of the relay frame support.