Earthquake Analysis of the Gravity Dam Monoliths of the Richard B. Russell Dam

摘要

Finite element computer analyses were performed for critical concrete sections of the Richard B. Russell Dam using as input several acceleration-time histories recommended by a panel of geologists and seismologists. Response spectra analyses were also performed using the Nuclear Regulatory Commission (NRC) Guide 1.60 design response spectra for a 0.25-g ground acceleration. Both complete time history response calculations and simplified approximate analyses are performed and their results compared. The effects of dynamic response parameters such as foundation flexibility and level of structural damping are studied. Conservative aspects of the different analysis procedures are pointed out, and their effects on structural stresses were qualitatively evaluated. A comparison of the results of these types of analyses is made with observations from the earthquake experience of the Koyna Dam during the Indian earthquake of 1967. Appendix A presents acceleration-, velocity-, and displacement-time histories and response spectra at 5 and 10 percent damping for eight earthquakes. Appendix B presents the results of an earthquake structural analysis of the Koyna Dam of India. (Author)