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Column is in tension

Column is in tension

(OP)
Hi all,
Please I need guidance and assistance. I recently modeled a two-storey reinforced concrete building using STAAD pro. For some of the columns, I got this message in my output file "Column is in tension for Load 2 - Design Ignored". Please what should I do to resolve this issue.

Nd

RE: Column is in tension

There is another forum for STAAD.pro here: http://www.eng-tips.com/threadminder.cfm?pid=750

According to the help, Section 3.7 Column Design, some tension is allowed, but the P-tens (maximum permissible tensile load on the column) would be very small for most concrete columns.
You probably want to make sure you have entered the gravity loads in the correct direction, verify if the tension force under load combinations is realistic, and then decide what to do from there.

RE: Column is in tension

Yes, check if the loads are defined properly but it is logically possible that a column will have axial tension under certain load conditions, especailly where there are large differences in span length or pattern loading or sway loading is involved.

Design it by hand for combined axial tension and bending based on the analysis results.

if you do not know how, you should not be using STAAD anyway!

RE: Column is in tension

Since your program isn't capable of designing a column under tension, you may use any other tool to perform the design externally. There are many programs for designing cross sections out there.

Regards.

Analysis and Design of arbitrary cross sections
Reinforcement design to all major codes
Moment Curvature analysis

http://www.engissol.com/cross-section-analysis-des...

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