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<br />c. Scope <br /> <br />This document contains: (a) general guidelines for selecting design <br />earthquakes and (b) methods of seismic analyses which ensure the safety <br />of existing dams and provide for the safe design of proposed dams. In <br />general, guidelines for proposed dams are to be applied to existing <br />dams; however, it is recognized that special considerations may <br />sometimes be required for existing dams. The following subjects are <br />discussed in the guidelines: <br /> <br />1. Fac tors to Consider in the Selec tion of Design Earthquakes <br /> <br />2. Selection of Design Earthquakes <br /> <br />3. <harac terization of Ground Motion Expec ted at the Site <br /> <br />4. Earthquake Analyses <br /> <br />5. Evaluation of Structural Adequacy for Earthquake Loading <br /> <br />A flowchart depicting the general process for selecting design <br />earthquakes and methods of seismic analyses is shown in figure 1. <br />The detail of the steps shown in the chart will depend on the needs <br />discussed above under purpose. <br /> <br />Terms used in the guidelines are defined in Appendix A. <br /> <br />The use of references has been minimized except in a few cases where <br />they are essential for clarity. Appendix B is a bibliography of <br />selected publications, reference to which should assist the use of <br />these guidelines. The references used in the text are contained in the <br />bibliography. <br /> <br />-6- <br />