https://www.writemy-essayforme.com/lab-reportSaleh's english - Essay Example
Phenomenon happened in the Millennium Bridge was rather serious. Norman Foster as the designer made the bridge strongly designed and estimated to be able to cope with degree of movements. As a matter of fact, serious trouble occurred on its deck when it swayed just like a drunken sailor. People who experienced that phenomenon told that it felt like a seasick. The worst thing was the elderly walkers clung on the side of the bridge. In a view, the phenomenon was like swaying bridge as a fairground ride. As it had been observed, the movements occurred on the Millennium Bridge were caused by Synchronous Lateral Excitation. In this case, small sideways oscillations happened because of natural sway motion of people walking; it was in turn to cause people who passed the bridge to sway in step, in which it made the amplitude of the bridge oscillations increased and reinforced the effect continuously. When it occurred, the worst movement was on the central span where the deck moved by up to 70mm. What a dramatic swaying that had made people who passed shocked.
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