Normalized Axial force by EC8 - Printable Version +- Civil Engineering Association (https://forum.civilea.com) +-- Forum: Various (https://forum.civilea.com/forum-6.html) +--- Forum: Free Discussion (https://forum.civilea.com/forum-46.html) +--- Thread: Normalized Axial force by EC8 (/thread-22830.html) |
Normalized Axial force by EC8 - giga - 03-05-2011 Hi My question have to concern with normalized axial force by EC into columns Under thew desired ductility conditions EC require this conditions ni=Ned/(Ac*fcd) <= 0.55 for DCH ... 1 ni=Ned/(Ac*fcd) <= 0.65 for DCM ... 2 ni=Ned/(Ac*fcd) <= 0.75 for DCL .... 3 Where Ned is axial force ( kN for ex.) given from seismical situations. My question is Which value of Axial force must be included in equations 1,2, and 3 N = Ng+0.3NP+Ns or N = 1.35Ng+1.5Np Or equations 1,2,3 must be checked with both values of axial forces Any reference or any example would be helpfull, Regards z.g. RE: Normalized Axial force by EC8 - rigid_joint - 03-05-2011 Quote:N = Ng+0.3NP+Nsthis value RE: Normalized Axial force by EC8 - giga - 03-05-2011 dear Rigid_Joint Thanks for reply any reference or any example if you have would bee very helpfull. I agree to you that the axial force should be taken from seismic design situations (Ng+0.3Np+Ns), but i have seen in some books that is taken 1.35Ng+1.5Np, and this have confused mee very much. One reference book in which the author use N = 1.35Ng+1.5Np and Ng+0.3Np+Ns, is book of author Jure Radiq - Betonske Konstrukcije - ( is in croatian Language). Regards z.g. RE: Normalized Axial force by EC8 - rigid_joint - 03-05-2011 the one and only right combination is the Ng+0.3q+Nseismic. RE: Normalized Axial force by EC8 - giga - 03-05-2011 because is related with seismic design situation which value of Gamac should be used for calculating of fcd. RE: Normalized Axial force by EC8 - DamirDz - 03-05-2011 Dear giga, i would advise you not to take to much reference from the Jure Radic book, one example being this you mentioned here. I had the same doubt a while ago just because of that book. One other reference i can come up with now is the El Ghazouli (don't know the exact spelling) book on EC8 which you can find here on the forum. Best regards! DamirDz RE: Normalized Axial force by EC8 - rigid_joint - 03-05-2011 Quote:which value of Gamac should be used for calculating of fcd.γc=1.5 |