ABSTRACT
TABLE OF CONTENTS 1. INTRODUCTION………813 2. OVERVIEW OF REPORTS RECEIVED………814 3. EARTHQUAKE PUBLICATIONS AND ONGOING WORK OF THE COMMITTEE ON SEISMIC ASPECTS OF DAM DESIGN………814 4. MAIN CHANGES AND DEVELOPMENTS IN THE SEISMIC DESIGN AND SAFETY EVALUATION OF LARGE DAMS SINCE 2003 Q.83………816 4.1. Seismic hazard is a multi-hazard………817 4.2. Significant earthquakes since 2003, which have caused important damage to dams and new lessons learnt from these events………817 4.3. Dam safety and seismic safety criteria………819 4.4. Dam risk classification and seismic design criteria………820 4.5. Seismic design criteria and definition of the different types of design earthquakes for dams………820 4.6. List of structures and elements of large dam projects, which have to be checked for the safety evaluation earthquake………823 4.7. Seismic safety evaluation of existing dams and procedure for periodic seismic safety checks of dams………823 4.8. Dynamic properties of mass concrete and rockfill………824 4.9. Shaking table tests of concrete dams………825 4.10. Numerical analysis………825 4.11. New types of dams………826 4.12. Developments for tailings dams………827 4.13. Outlook on future developments………828 5. DISCUSSION OF PAPERS………829 5.1. General………829 5.2. Static, seismic and post-seismic monitoring of dams………830 5.3. Feedback from observed performance, including tailings dams and levees………832 5.4. Importance of multiple features of earthquake hazard (e.g., ground shaking, surface fault movements, mass movements)………832 5.4.1. Earthquake ground motion………833 5.4.2. Fault movement………834 5.4.3. Seismic hazard studies………834 5.4.4. Reservoir-triggered seismicity………835 5.5. Seismic design and performance criteria for dam structure, reservoir rim and impacted area………836 5.5.1. General guidelines………837 5.5.2. Embankment dams………838 5.5.3. Concrete gravity dams………843 5.5.4. Concrete arch dams………846 5.5.5. Appurtenant structures………848 5.6. Earthquake safety evaluation of all types of dams and safety-critical elements (e.g., spillway, low-level outlets)………849 5.6.1. General………849 5.6.2. Portfolios of dams………849 5.6.3. Embankment dams………850 5.6.4. Concrete gravity………851 5.6.5. Levees………853 6. CONCLUDING REMARKS………854 7. ABBREVIATIONS………855 ACKNOWLEDGEMENTS………856 REFERENCES………856
