Rocky1986
Structural
- Aug 14, 2015
- 1
Dear All,
I have made simple model (attached below) of piperack and checked it for russian steel norms. Strength check is ok, but ratio for deflection check didn't calculate for half of elements:
[highlight #FCAF3E]LIMIT SPAN/DEFLECTION (DFF) = 200.00 (DEFLECTION LIMIT= 0.015 M)
SPAN/DEFLECTION = 0.000E+00 (DEFLECTION= InfinityM)
LOAD= 6 RATIO= Infinity[/highlight]
For example, local deflection of member 70 is 0.5mm (y direction, combination 3), allowable deflection limit for it is 3000mm/200=15mm. But staad state that [highlight #FCAF3E]DEFLECTION= InfinityM.[/highlight]
Also defl. check for the same beams (members 102, 106,110 etc) at next bays passed:
[highlight #FCAF3E]LIMIT SPAN/DEFLECTION (DFF) = 200.00 (DEFLECTION LIMIT= 0.015 M)
SPAN/DEFLECTION = 6.040E+03 (DEFLECTION= 4.967E-04M)
LOAD= 3 RATIO= 0.033[/highlight]
Pls give me a light to solve that matter, may be it is program bug?
I have made simple model (attached below) of piperack and checked it for russian steel norms. Strength check is ok, but ratio for deflection check didn't calculate for half of elements:
[highlight #FCAF3E]LIMIT SPAN/DEFLECTION (DFF) = 200.00 (DEFLECTION LIMIT= 0.015 M)
SPAN/DEFLECTION = 0.000E+00 (DEFLECTION= InfinityM)
LOAD= 6 RATIO= Infinity[/highlight]
For example, local deflection of member 70 is 0.5mm (y direction, combination 3), allowable deflection limit for it is 3000mm/200=15mm. But staad state that [highlight #FCAF3E]DEFLECTION= InfinityM.[/highlight]
Also defl. check for the same beams (members 102, 106,110 etc) at next bays passed:
[highlight #FCAF3E]LIMIT SPAN/DEFLECTION (DFF) = 200.00 (DEFLECTION LIMIT= 0.015 M)
SPAN/DEFLECTION = 6.040E+03 (DEFLECTION= 4.967E-04M)
LOAD= 3 RATIO= 0.033[/highlight]
Pls give me a light to solve that matter, may be it is program bug?
