考虑P_效应的钢筋混凝土框架柱设计方法_魏巍.pdfVIP

DOI :10.14006/j.jzjgxb.2006.05.009 27 5 　　　　　 Vol.27, No.5 2006 10 Jour al of Buildi g Structures Oct.2006 :1000-6869(2006)05-0064-08 P -δ 1 2 1 1 魏　巍, 朱爱萍, 刘　毅, 白绍良 (1., 400045;2.,100013) :《》(GB 50010—2002)《》(JGJ 3—2002) P-δ, , P -δ 。ACI Committee 318 Eurocode 2 P-δ Cm , , Cm 。 。 :;;P-δ; :TU375.401　　:A Desig methods of rei forced co crete frame colum co sideri g P -δeffect 1 2 1 1 WEI Wei , ZHU Aipi g , LIU Yi , BAI Shaolia g (1.Cho gqi g U iversity, Cho gqi g 400045, Chi a; 2.Chi a Academy of Buildi g Research, Beiji g 100013, Chi a) Abstract:Motivated by the doubt whether P -δeffect of a si gle colum is co sidered thoroughly i the desig procedure of seco d-order a alysis, such as the “Code for desig of rei forced structures (GB 50010—2002)”a d “Tech ical specificatio for co crete structures of tall buildi g (JGJ 3—2002)”, this paper prese ts a detailed illustratio of the rules of first-order mome t of frames i flue ced by P -δeffect based o a series of FEM a alysis.The i appropriate determi atio of P -δeffect, equivale t le gth a d reductio factor Cm co sideri g the i flue ce of colum e d mome t asymmetric ecce tricity i frames accordi g to ACI 318 a d Eurocode 2 are poi ted out.Co seque tly, a better defi itio a d a more reaso able value of the equivale t le gth are proposed based o FEM a alysis, a improved value of reductio factor Cm is also proposed o the basis of experime tal results.This paper attempts to provide a refere ce for refi ed desig methods of frame colum co sideri g seco d order effect. Keywords:rei forced co crete;seco d order effect;P -δeffect;equivale t le gth