I need help on the following...
For steel beams,the flexural-torsional instability is taken in consideration by the form of lambda= (My/Mcr)^.5 being My the yelding moment and Mcr the Elastical Critical moment, with which we can obtain a reduction factor for the final plastic or elastic resistance due to lateral-torsional instability.
If I have a concrete beam lets say, with 4.5m high and 30 meters long with only 30cm thick, which isn't braced in the mid span, how can I check if I have instability for flexural torsional mode?
I mean, the resistance of the beam is huge if it doesn't buckle, but if it does? How can I have it in consideration?
Ok, I can get the critical elastic moment, but how to use that information to get a reduction of plastic resistance?
I would prefer some guidance based on the eurocode, but some other code recomendation will work to if it's not a blackbox information...
thanks in advance
For steel beams,the flexural-torsional instability is taken in consideration by the form of lambda= (My/Mcr)^.5 being My the yelding moment and Mcr the Elastical Critical moment, with which we can obtain a reduction factor for the final plastic or elastic resistance due to lateral-torsional instability.
If I have a concrete beam lets say, with 4.5m high and 30 meters long with only 30cm thick, which isn't braced in the mid span, how can I check if I have instability for flexural torsional mode?
I mean, the resistance of the beam is huge if it doesn't buckle, but if it does? How can I have it in consideration?
Ok, I can get the critical elastic moment, but how to use that information to get a reduction of plastic resistance?
I would prefer some guidance based on the eurocode, but some other code recomendation will work to if it's not a blackbox information...
thanks in advance
