Reliability Analysis of Concrete-Filled Tube Column

Abstract:

To improve the accuracy of describing the nonlinear behavior of long concrete-filled tubes (CFT) and make the nonlinear reliability analysis method more valuable for engineering application, based on the response surface and nonlinear finite element method, the reliability analysis model for the nonlinear carrying capacity of concrete-filled steel tube structure is made, with the help of consistent mode imperfection method to consider the initial geometric defects of the structure. After a parametric analysis of the diameter-thickness ratio and the slenderness ratio, the application scope is examined. The numerical results show that as the slenderness ratio increases, the influence of the initial geometric defects on the reliability of carrying capacity increases gradually. It is suggested that when the slenderness ratio is bigger than 15, the effect of initial geometric defects on the reliability index should be included. Moreover, when the diameter-thickness ratio is smaller, influence of geometric nonlinearity on the reliability index of the carrying capacity is obvious.

• Periodical: Advanced Materials Research (Volumes 446-449)
• Pages: 667-671
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.446-449.667
• Online since: January 2012
• Authors: Lei Lei Liu
• Keywords: Concrete-Filled Tube, Initial Geometric Defects, Nonlinear, Reliability, Response Surface

References

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