PARAMETRIC STUDY ON ULTIMATE BEARING CAPACITY OF CONCRETE-FILLED STEEL TUBE RIB ARCH
The effect of parameters on the ultimate beating capacity of concrete-filled steel tube (CFST) structures is investigated. CFST rib arches with dumbbell type cross-sections are analyzed by three-dimensional nonlinear finite element method. The effect of loading combinations, rise-to-span ratio, confinement factor, strength of concrete, and length of the handle of dumbbell on the ultimate bearing capacity of CFST rib arches is studied. The investigation shows that unsymmetrical loading combination governs the behavior of CFST arch structures, and the ultimate bearing capacity of CFST rib arches reduces with the rise-to-span ratio reduces. The ultimate bearing capacity of CFST arch structures increases approximately linearly with the grade of core concrete increases when the grade of core concrete is less than C60. It is no more economic for CFST arch structures when the confinement factor is greater than 1.9. The most suitable length of the handle of dumbbell is 1.25 times outer diameter of steel tube.
Concrete-filled steel tube Rib arch Ultimate bearing capacity Parametric study
Wei Wang Wei-Lian Qu
School of Civil Engineering & Architecture, Wuhan University of Technology, Wuhan 430070, P.R. China Hubei Key Laboratory of Roadway Bridge & Structure Engineering, Wuhan University of Technology, Wuha
国际会议
第十届国际结构工程青年学者研讨会(The Tenth International Symposium on Structural Engineering for Young Experts)
长沙
英文
810-814
2008-10-19（万方平台首次上网日期，不代表论文的发表时间）