The bridge Essay Example | Topics and Well Written Essays - 500 words

The bridge - Essay ExampleMillennium Bridge was designed to carry king-size load and a degree of structures movement was expected and taken into account. However, after about 80000 people crossed it on the chess opening day, some vibration was detected. The bridge began to sway sideways noticeably, and the movement became so strong that people could not walk steady any more umteen had to cling to the sides of the bridge to maintain balance. The phenomenon of bridge sideways movement is not unique to the Millennium Bridge only. There were other structures, completely different from the effrontery bridge that, to a various degree, suffered the same proceeds. However, those cases have not been widely publicized, thus the phenomenon, known as Synchronous Lateral Excitation, was not anticipated and has not been given enough attention by bridge engineers. When people walk they have a natural sway motion. This very motion causes small steady vibrations, which, as the result of chance correlation, generated slight lateral movement of the bridge. When that happened, pedestrians instinctively adjusted and synchronized their motion with bridges movement to counteract the effect and to walk more comfortably.