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Beams cracking torsion

Beams cracking torsion

Beams cracking torsion

(OP)
Hello,

I want to ask about cracking torsion when the member subjected to high axial force like tempreture
then the term under the square root will be minus, so then what is this mean ?
can i ignore torsion or the cracking torsion will be zero ?


RE: Beams cracking torsion

Not familiar with ACI to any extent... if tension, is Nu +ve or -ve?

Dik

RE: Beams cracking torsion

(OP)
Nu is negative for tension

RE: Beams cracking torsion

Axial tension reduces torsion capacity. You cannot ignore it.

Your cracking torsion is 0 if the section is already cracked in tension!

RE: Beams cracking torsion

(OP)
even beam is cracked why cracking torsion should be 0 ?
if the beam works compatible, the code allowed to reduce Tu to Tcr
so then if Tcr is zero should i design for full Tu even if it works compatible ??

RE: Beams cracking torsion

If the section is already cracked, the concrete provides no torsional strength. Reinforcement has to be supplied for the total.

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