Seismic Performance of Concrete-Encased CFST Piers: Experimental Study
Publication: Journal of Bridge Engineering
Volume 21, Issue 4
Abstract
Concrete-encased concrete-filled steel tube (CFST) box members have been recently used as piers and arches in bridges owing to their high stiffness and strength. However, the seismic behavior of these members has not been thoroughly investigated, which hinders the usage of such members in earthquake-prone zones. In this study, eight concrete-encased CFST box specimens and eight RC box counterparts were tested under constant axial load along the specimen and cyclic lateral load at the midspan. The experimental parameters were the axial-load level and cross-sectional type of the column. The effects of these parameters on the strength, ductility, stiffness degradation, and energy dissipation were studied. Compared with the corresponding RC box columns, the performances of concrete-encased CFST box columns, including the lateral resistance, stiffness degradation, ductility, and energy dissipation capacity, were significantly improved. A simplified calculation method was proposed to evaluate the flexural resistance of concrete-encased CFST box columns.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
This work is part of Projects 51378290 and 51208281 supported by the National Natural Science Foundation of China (NSFC). The authors thank Mr. En-Pu Xie and Miss Jing Chen for assistance in experiments.
References
AASHTO. (2012). AASHTO LRFD bridge design specifications, Washington, DC.
ACI (American Concrete Institute). (2014). “Building code requirements for structural concrete and commentary.” ACI 318-14, Farmington Hills, MI.
AISC. (2010). “Specification for structural steel buildings.” ANSI/AISC 360-10, Chicago.
An, Y.-F., Han, L.-H., and Zhao, X.-L. (2013). “Experimental behaviour of box concrete-encased CFST eccentrically loaded column.” Mag. Concr. Res., 65(20), 1219–1235.
An, Y.-F., Han, L.-H., and Zhao, X.-L. (2014). “Analytical behaviour of eccentrically loaded concrete-encased CFST box columns.” Mag. Concr. Res., 66(15), 789–808.
BSI (British Standards Institution). (2004). “Eurocode 4: Design of composite steel and concrete structures–Part 1.1: General rules and rules for building.” BS EN 1994-1-1, London.
China Architecture & Building Press. (2010). “Code for design of concrete structures.” GB50010-2010, Beijing (in Chinese).
CSA (Canadian Standards Association). (2007). “Concrete poles.” CAN/CSA-A14-07 (R2012), Toronto.
Elremaily, A., and Azizinamini, A. (2002). “Behavior and strength of circular concrete-filled tube columns.” J. Constr. Steel Res., 58(12), 1567–1591.
Han, L.-H., and An, Y.-F. (2014). “Performance of concrete-encased CFST stub columns under axial compression.” J. Constr. Steel Res., 93(2), 62–76.
Han, L.-H., An, Y.-F., Roeder, C., and Ren, Q.-X. (2015). “Performance of concrete-encased CFST box members under bending.” J. Constr. Steel Res., 106(3), 138–153.
Han, L.-H., Li, W., and Bjorhovde, R. (2014). “Developments and advanced application of concrete-filled steel tubular (CFST) structures: Members.” J. Constr. Steel Res., 100(9), 211–228.
Han, L.-H., Liao, F.-Y., Tao, Z., and Hong, Z. (2009). “Performance of concrete filled steel tube reinforced concrete columns subjected to cyclic bending.” J. Constr. Steel Res., 65(8–9), 1607–1616.
Hines, E. M., Seible, F., and Priestley, M. J. N. (2002). “Seismic performance of hollow rectangular reinforced concrete piers with highly-confined boundary elements: Phase I: Flexural tests; Phase II: Shear tests.” Rep. SSRP-99/15, Univ. of California, San Diego.
Pinto, A. V., Molina, J., and Tsionis, G. (2003). “Cyclic tests on large-scale models of existing bridge piers with rectangular hollow cross-section.” Earthquake Eng. Struct. Dyn., 32(13), 1995–2012.
Wang, Z.-B., Yu, Q., and Tao, Z. (2015). “Behaviour of CFRP externally-reinforced circular CFST members under combined tension and bending.” J. Constr. Steel Res., 106(3), 122–137.
Yeh, Y.-K., Mo, Y. L., and Yang, C. Y. (2002). “Seismic performance of rectangular hollow bridge columns.” J. Struct. Eng., 60–68.
Zhang, Y.-Y., Harries, K. A., and Yuan, W.-C. (2013). “Experimental and numerical investigation of the seismic performance of hollow rectangular bridge piers constructed with and without steel fiber reinforced concrete.” Eng. Struct., 48(3), 255–265.
Information & Authors
Information
Published In
Journal of Bridge Engineering
Volume 21 • Issue 4 • April 2016
Copyright
© 2015 American Society of Civil Engineers.
History
Received: Apr 17, 2015
Accepted: Aug 5, 2015
Published online: Dec 30, 2015
Published in print: Apr 1, 2016
Discussion open until: May 30, 2016
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.