圆钢管混凝土压弯构件荷载位移滞回模型研究_杨有福.pdf

23 6 　　　　　　　　 Vol.23, No.6 2003 12 EA RT HQUAKE ENGINEERING A ND ENGINEERING VIBRAT ION De ., 2003 　　 :1000-1301(2003)06-0117-07 - 杨有福, 韩林海 (, 350002) :, -。 。 , , 、、 -。 -。 :;;;; :P315.9 :A 　　　 Research on load-di splacement hysteretic model of concrete-filled circular steel tubular beam-columns YANG You-fu, HAN Lin-hai (College of Civil Engineering and Ar hite ture, Fuzhou University, Fuzhou 350002, China) Abstract:Numeri al method is used to analyze the load-displa ement hystereti behaviors of on rete-filled ir u- lar steel tubular beam-olumns in this paper.The analyti results agree well w ith the experimental ones.Based on theoreti al model, influen es of several parameters, su h as axial load level, slenderness ratio, steel ratio and strength of the materials on the load displa ement hystereti urves are analyzed .Finally, a kind of load-dis- pla ement hystereti model and simplified al ulating method for the du tility oeffi ient of on rete-filled ir u- lar steel tubular beam-olumns are put forw ard. Key words:on rete-filled steel tube;ir ular se tion;hy stereti behaviors;hystereti models;du tility oeffi ient 1　 　　、、, [1] 。 , -, , Boyd [2] [3] [4] [ 5] (1995) , Shams Saadeghvaziri(1997) , Fujinaga (1998) , Elremaily Azizinamini (2002) , [ 6 〗 [ 7] [8] [9] (1992) , (1994) , (1994) , (2001) 。- [7 ～9] 。 , -, 。[9]-, :2003-10-24;　:2003-11-27 　　:(2002H070 ). 　　:(1975-), , , . ·118 · 　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　23 , - 。 2　- 　　-, (P )- [10] (Δ) 。, P -Δ , , 。 P -Δ, , 。1 P -Δ。,D ;t