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dynamic behavior of long span steel structure roof !!!!

thread487-401609

dynamic behavior of long span steel structure roof !!!!

dynamic behavior of long span steel structure roof !!!!

(OP)
hi guys, i just wanted to ask you about the dynamic behavior of long span steel structure roof, in fact am studying one with 110 m span , my problem is that am having always the 1st mode with Z direction with a 34% of mass participation ! could anyone give us an idea about this kind of structures ????? and if it's OK to have such a behavior ? FYI, the roof is almost circular in shape supported by 6 columns !
thanks in advance !
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