According to 5.12 Wenchuan earthquake peak acceleration attenuation relations, EW, NS, UD direction of the decided dam bedrock ground peak acceleration are 510 gal, 450 gal, 420 gal, and then measured acceleration records(051MXT) are conversion to the input acceleration time history of Zipingpu Dam by using the ratio method.Based on rockfill E-B model parameters inversion by the construction phase deformation monitoring data, the initial parameters of dynamic models with vibration hardening characteristics are gained by Jilintai,Houziyan and other projects laboratory test data; combined with Guanmenshan, Chahanwusu-situ testing data and the dam measured spectral characteristics of the earthquake acceleration, they are adjusted; by calculating effective vibration times to the input earthquake acceleration and using the measured data, the rockfill permanent deformation parameters are decided by the inversion analysis; it is concluded that：vibration hardening dynamic model reflects the rockfill material 'shock shrinkage' phenomenon during an earthquake. The main reason of the larger Zipingpu dam permanent deformation during 5.12 Wenchuan earthquake are that both the longer main shock time and the near earthquake, Shear failure of concrete slab betweenⅡand Ⅲ stage is secondary damage caused by rockfill permanent deformation. Existing dynamic analysis theories and methods of embankment dam can basically reflect earth-rock dam seismic characteristics.
