In the attached model, i have assigned the Rod Bracing as "Tension Member". But it fails in compression. What is the reason & what is the solution, please clarify.2. JB_053_20_B01_Tyre Curing Press Bldg._R00 (Meghna Innova Rubber Co. Ltd.)(Proposed Bracing).zip
The explanation to this issue can be found here: https://communities.bentley.com/products/ram-staad/w/structural_analysis_and_design__wiki/26838/compression-force-developed-in-tension-members
I am still waiting for you answer.
Sure. STAAD.Pro Advanced CONNECT Edition - Version 21.00.02.43
If you consider member 294, the axial forces at the start and end nodes are as mentioned next
start node 28 = 0.076 kN ( Axial compression )
end node 657 = 0.081 kN (Axial tension)
So the axial force at the center of the member is -0.081+0.076/2 = -0.0025 which is tensile and that why the member has not been deactivated from the analysis.
Using MAIN and TMAIN as 1 would allow you to bypass the slenderness checks and that is the reason why you are not getting a slenderness failure in spite of the fact that the actual slenderness for the member is way above the allowable limits. However the member would still be designed at all 13 sections. At the first section the axial compression comes out to be 0.076 KN which is more than the capacity in compression and that is why the section fails the code check.
If you do not have to design these sections, you may just leave those out from your CHECK CODE. If you would like to do a CHECK CODE then you would have to use a bigger section.
Thanks a lot for your information's. But, please let me clear about the words, "member would still be designed at all 13 sections". I am little bit confused about that.
STAAD.Pro considers 13 equally spaced sections along the member length (including the start and the end locations) and carries out the design at each section considering all loads. The one with highest utilization ratio is then reported.
Thanks a lot for your information. Now it is clear to me.