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disortion from heating[Subject Prev][Subject Next][Thread Prev][Thread Next]
- To: seaint(--nospam--at)seaint.org
- Subject: disortion from heating
- From: RoyLevy(--nospam--at)aol.com
- Date: Tue, 5 Jan 1999 19:36:32 EST
Many years ago I heard of a team of technicians who had developed a technique to straighten deformed steel bridge structures in place by flame- straightening. To help me understand the principles, this is my question: Assume a steel plate say 3/8" thick by 4" wide and 3 ft long, simply supported at the ends, say resting on a pair of saw horses. Heat is applied across the top at the center, for example by welding a 1/4 x 4 " wide gusset plate at the center, across and perpendicular to the plate ( 2 3/16" f illet welds, 4 '' long , for example) . Will the center of the plate rise or will it sag ? In another form, the question is which will prevail - The loss of rigidity while the top is molten or the contraction effect upon cooling?
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