mohamed abdel aziz
Structural
- Nov 13, 2023
- 9
hello everyone,
in EN1993 5.2.2 structural stability of frames we are allowed to run first order analysis and amplify the horizontal loads if
alpha_cr is <10 and >3 my question is do we also amplify seismic forces in that case or not
considering that there is another condition for amplifying seismic forces in EN1998 4.4.1(2)
where theta is between 0.1 and 0.2
my understanding is we only amplify only wind and equivalent loads based in the alpha_cr condition and amplify seismic forces only based on the second condition so there will be cases where for instance seismic forces are amplified but not wind and EHF and vice versa.Can someone confirm this ? thanks in advance
in EN1993 5.2.2 structural stability of frames we are allowed to run first order analysis and amplify the horizontal loads if
alpha_cr is <10 and >3 my question is do we also amplify seismic forces in that case or not
considering that there is another condition for amplifying seismic forces in EN1998 4.4.1(2)
where theta is between 0.1 and 0.2
my understanding is we only amplify only wind and equivalent loads based in the alpha_cr condition and amplify seismic forces only based on the second condition so there will be cases where for instance seismic forces are amplified but not wind and EHF and vice versa.Can someone confirm this ? thanks in advance