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| Re: The Manhattan Bridge (812759) | |||
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Re: The Manhattan Bridge |
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Posted by Subterranean Railway on Sat Jul 25 20:44:44 2009, in response to Re: The Manhattan Bridge, posted by Chris R16/R2730 on Sat Jul 25 11:53:49 2009. This rebuild basically stiffened the bridge so that it could withstand the stresses better.IIRC the rebuild did precisely the opposite by replacing faulty expansion joints which hampered the bridge's movement. A stiff suspension bridge won't last long. It was never designed to flex. Vertical oscillations of that magnitude are completely normal for any suspension bridge. Some degree of torsional oscillation is also to be expected, although the original design probably did not account for any torsional oscillations caused by imbalanced train traffic. |
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