In-Plane Stability of Fixed Concrete-Filled Steel Tubular Parabolic Arches under Combined Bending and Compression
Publication: Journal of Bridge Engineering
Volume 22, Issue 2
Abstract
The current codes and specifications use the equivalent beam-column method to predict the in-plane stability capacity of concrete-filled steel tubular (CFST) arches. Using this method, the effects of the rise-span ratio and the nonuniform moment on the stability capacity of CFST parabolic arches are not considered. This may induce a difference between calculation results and actual structural stability capacity. To study the effects of the rise-span ratio and the nonuniform moment, six fixed CFST parabolic arches, with rise-span ratios of 1/4.5, 1/6, and 1/9, were tested and analyzed in this study. The failure patterns and mechanisms were studied. The confining effect of the steel tube to the concrete at failure was investigated. The influence of the rise-span ratio and loading conditions on the in-plane stability of fixed CFST arches was also considered. A nonlinear elastic-plastic finite-element (FE) model was used to predict the buckling behavior of the fixed CFST parabolic arches. Based on the test and the FE results, a design equation is proposed for the design of in-plane stability of fixed CFST parabolic arches under combined bending and compression.
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Acknowledgments
This work was supported by the National Natural Science Foundation of China (Grants 51378152 and 51308254) and the National Science and Technology Pillar Program during the 12th Five-Year Plan Period (2011BAJ09B02-03). These supports are gratefully acknowledged.
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Published In
Journal of Bridge Engineering
Volume 22 • Issue 2 • February 2017
Copyright
© 2016 American Society of Civil Engineers.
History
Received: Jan 28, 2016
Accepted: Jul 25, 2016
Published online: Oct 3, 2016
Published in print: Feb 1, 2017
Discussion open until: Mar 3, 2017
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