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

[civilfouz]

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 1 mode with Z direction and 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 !

 

[hokie66]

Did you just pick a forum at random? I don't know how your structure relates to earthwork.

 

[JedClampett]

Hokie, it's eventually supported on dirt.

 

[civilfouz]

ha ha ha , well thanks guys , i think i just fell from Mars , i took earthworks for earthquake he he he ! thanks for showing up