diaphragm plate การใช้

• The engineering firm Wiss, Janney, Elstner Associates, Inc . was hired to investigate how the diaphragm plates became compromised.
• The boiler barrel was attached to the engine frame by four diaphragm plates, bolted to " T " sections which were riveted to the barrel.
• The original cable failure was due to cracks in diaphragm plates that anchor the ends of the cables to the steel tower, and significant cracks have subsequently been found in three of those anchorages.
• On June 8, 2012, a summary report of the investigation was released in which the failure was attributed to wind-induced " cable vibrations that induce damaging stress range cycles at fatigue sensitive details in the cable diaphragm plates . " The effect of cable vibrations caused by wind was not included in the original design package for the bridge.