大跨度悬索拱桥极限承载能力研究-地震工程与工程振动.PDFVIP

28 3 Vo.l 28 No. 3 2008 6 JOURNAL OF EARTHQUAKE ENGINEERING AND ENG INEERING V IBRATION Jun. 2008 : 000 30 ( 2008) 030 606 赵 雷, 黄 灿 , 武芳文2 ( . , 6 003 ; 2. , 7 0064 ) : , , , , 5. 2 ~ 5. 8, 2. 0~ 2. 6; 4. 9~ 5. , . 7~ . 9, : ; ; ; ; : P3 5. 952. 2 : A Study on u ltim ate loadcarrying capacity of longspan suspend ed arch bridge 2 ZHAO Lei, Huang Can , WU Fangw en ( . School of Civ ilEng ineering, Southw est Jiaotong University, Chengdu 6 003 , China; 2. School ofH ighw ay, Chang an University, X i an 7 0064, China) Abs tract: The characteristics of suspended arch bridge and them ethod for calcu lating the u ltmi ate loadcarrying ca pacity are introduced firstly. Then based on the theory of finite element, the ultmi ate loadcarrying capacity of a raiwl ay suspended arch bridge is analyzed considering the deformation during construction and the superposition effect of stresses, geometric nonlinearity, material nonlinearity and the effect of in itial defect in them embers ( such as arch rib) during construction. The research resu lts show that the elastic stability factors are 5. 2 to 5. 8; the non elastic stab ility factors are 2. 0 to 2. 6 in the construction stage; the elastic stab ility factors are 4. 9 to 5. ; the non elastic stab ility factors are . 7 to . 9 in the service stage. So the elastic stab ility and the nonelastic stability are adequate in construction stage and service stage. F inally, a conclusion is drawn that the calcu lating method and the resu lts are valuable for the calcu lation and design theory of suspended arch bridg