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COMMISSION INTERNATIONALE DES GRANDS BARRAGES ------- VINGT-SIXIÈME CONGRÈS DES GRANDS BARRAGES Autriche, juillet 2018 ------- 50 YEARS OF COMMITTEE ON SEISMIC ASPECTS OF DAM DESIGN Martin WIELAND Chairman, ICOLD Committee on Seismic Aspects of Dam Design, POYRY SWITZERLAND LTD., ZURICH SWITZERLAND EXTENDED ABSTRACT The Committee on Seismic Aspects of Dam Design is one of ICOLD’s oldest technical committees, which at present comprises dam and earthquake experts from 34 different countries from all continents. The Committee was created in 1968 and will celebrate its 50th anniversary in 2018. Guidelines on (i) different seismic hazards affecting storage dams, such as fault movements in the footprint of dams, and reservoir-triggered seismicity, (ii) seismic design criteria, (iii) dynamic analysis of dams, (iv) conceptual guidelines for earthquake-resistant design of dams and design of appurtenant structures, and (v) seismic monitoring and inspection of dams after earthquakes, have been published. These guidelines, listed below, represent the international state-of-the-art in the seismic design, construction and safety assessment of large storage dams, i.e. Bulletin 52 (1986): Earthquake analysis procedures for dams, Bulletin 112 (1998): Neotectonics and dams, Bulletin 113 (1999): Seismic observation of dams, Bulletin 120 (2001): Design features of dams to resist seismic ground motion, Bulletin 123 (2002): Earthquake design and evaluation of structures appurtenant to dams, Bulletin 137 (2011): Reservoirs and seismicity, Bulletin 148 (2016): Selecting seismic parameters for large dams, and Bulletin 166 (2016): Inspection of dams following earthquakes 3