轴力和弯矩共同作用下的约束钢柱受火性能分析.pdfVIP

38 2 Vol. 38 No. 2 2010 2 JOURNAL OF TONGJI UNIVERSITY NATURAL SCIENCE Feb. 2010 : 0253-374X 2010 02-0151-07 DOI: 10. 3969/ j. iss .0253-374x.2010. 02.001 1, 2 1, 3 4 王培军 , 李国强 , 王永昌 1. , 200092; 2. , 250061; 3. , 200092; 4. , , , M60 1QD : curve, the colum be di g mome t-temperature evolutio . , curve, the failure temperature of restrai ed colum , the , , differe ce betwee failure temperature of u restrai ed- a d , restrai ed-colum , a d the differe ce betwee failure- a d . : , buckli g-temperature of restrai ed colum . Results of , , , parametric study show that: before the colum buckles, the ; , , axial force i colum i creases li early a d be di g mome t cha ges alittle; after the colum buckles, the colum is loaded , , u der combi ed axial force a d be di g mome t; the axial , restrai t reduces failuretemperature of restrai ed colum ; a d ; the reductio i failure temperature i creases with i creasi g , ; i axial restrai t stiff ess. However, there is a critical axial . restrai t stiff ess ratio, above which o further reductio i : ; ; ; ; colum failure temperature occurs; with the i creasi g of axial load ratio a d be di g mome t load ratio, the failure temperature of restrai ed colum decreases; the e d mome t : TU 393. 2 : A ratio has very limited effects o failure temperature of the restrai ed colum . Behaviors of Restrained Steel Column in Fire Key words: restrai ed colum ; buckli g temperature; failure Under Combined Axial Force and temperature; parametric a alysis; umerical simulatio Bending Moment 1, 2 1, 3 4 WANG Peiju , LI Guoqia g , WANG Yo gcha g 1. State Key Laboratory for Disaster Reductio i Civil E gi eeri g, 1 To gji U iversity, Sha ghai 200092, Chi a; 2. School of Civil E gi eeri g, Sha do g U iversity, Ji a 250061, Chi a; 3. College of Civil E gi eeri g, To gji U iversity, Sha ghai 200092, Chi a; 4. [ 1] [ 2] [ 3] , Wa g , Fra sse , Neves School of Mecha ical, Aerospace a d Civil E g