Membership
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Fellow: American Society of Civil Engineers (honorary; chairman engineering mechanics division 1964?Co65, Research award 1960, Howard award 1970, Newmark medal 1979, Moissieff medal 1980, T. VonKarman medal 1980)
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Institute Water Conservation and Hydroelectric Power Research (honorary); National Academy of Engineering
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National Academy of Sciences (dynamics panel advisory board on hardened electric power system 1964?Co70)
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Chinese Academy Engineering
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Seismological Society American (board directors 1970?Co73)
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Structural Engineers Association Northern California 1967?Co70
