The lexicon of North American bridge engineers and researchers includes a new term, "rain/wind induced vibrations." Until roughly a decade ago, engineers had not observed this class of vibrations in newer-generation cable-stayed bridges, much less accounted for it in design. The Japanese appear to have been the first to experience this effect, in the mid-1980s. Europeans and North Americans began to describe a similar phenomenon on several newer structures shortly thereafter. Engineers should be aware of what we know, what we do not know and what we should know about these vibrations.
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