CFRP Strip Cable Retrofit of RC Frame for Collapse Resistance
Publication: Journal of Composites for Construction
Volume 21, Issue 1
Abstract
A half-scale, three-story, two-bay, and three-span reinforced concrete model frame retrofitted with carbon fiber–reinforced polymer (CFRP) strip cables was tested under sudden removal of two side middle columns in the long direction on the ground floor to study dynamic responses, resisting mechanism, and CFRP retrofit effects. The CFRP strip cables were anchored to concrete slabs by specially designed anchorage. The experimental results are compared with previous tests of the same frame without CFRP retrofit. The comparison shows that the CFRP strip cables were effective in preventing the total collapse of the frame after the loss of columns. With additional CFRP strip cables, the frame structure sustained the applied gravity load as moment-resisting frames without a transition to catenary action. To further demonstrate the effects, the CFRP strip cables were released, causing the frame structure to deflect downward and eventually collapse. A simplified method was proposed to calculate the average strain on CFRP strip cables and a combining resisting mechanism was established to compute the ultimate capacity provided by slabs, beams, and CFRP strip cables.
Get full access to this article
View all available purchase options and get full access to this article.
Acknowledgments
The experimental work of this research was conducted at Hunan University under the support of the National Key Basic Research Program of China (973-2012CB026200) and the Thousand-Talent National Expert Scholarships. The analytical work was mainly provided by the Thousand-Talent National Expert Scholarship fund at Nanjing Tech University.
References
ACI (American Concrete Institute). (2008). “Building code requirements for structural concrete (ACI 318-08) and commentary.” ACI 318-08, Farmington Hills, MI.
ASCE/SEI (Structural Engineering Institute). (2010). “Minimum design loads for buildings and other structures.” ASCE/SEI 7-10, Reston, VA.
Astaneh-Asl, A., et al. (2001). “Use of catenary cables to prevent progressive collapse of buildings.”, Univ. of California, Berkeley, CA.
Crawford, J. E. (2002). “Retrofit methods to mitigate progressive collapse.” National Workshop and Recommendations for Future Effort, National Institute of Building Sciences, Washington, DC.
Jonaidi, M., and Sasani, M. (2012). “Retrofit of concrete slabs with FRP to resist progressive collapse.” Proc., 20th ASCE Analysis and Computation Specialty Conf., ASCE, Reston, VA, 488–497.
Kim, I., Jirsa, J. O., and Bayrak, O. (2013). “Anchorage of carbon fiber-reinforced polymer on side faces of reinforced concrete beams to provide continuity.” ACI Struct. J., 110(6), 1089–1098.
Kim, J., and Shin, W. S. (2013). “Retrofit of RC frames against progressive collapse using prestressing tendons.” Struct. Des. Tall Spec. Build., 22(4), 349–361.
Lew, H., Bao, Y., Pujol, S., and Sozen, M. A. (2014). “Experimental study of reinforced concrete assemblies under column removal scenario.” ACI Struct. J., 111(4), 881–892.
Ministry of Housing and Urban-Rural Development of the People’s Republic of China. (2010). “Code for seismic design of buildings.” GB 50011-2010, Beijing, China.
Orton, S., Jirsa, J. O., and Bayrak, O. (2009). “Carbon fiber-reinforced polymer for continuity in existing reinforced concrete buildings vulnerable to collapse.” ACI Struct. J., 106(5), 608–616.
Qian, K., and Li, B. (2012). “Slab effects on response of reinforced concrete substructures after loss of corner column.” ACI Struct. J., 109(6), 845–856.
Qian, K., and Li, B. (2013a). “Experimental study of drop-panel effects on response of reinforced concrete flat slabs after loss of corner column.” ACI Struct. J., 110(2), 319–329.
Qian, K., and Li, B. (2013b). “Strengthening and retrofitting of RC flat slabs to mitigate progressive collapse by externally bonded CFRP laminates.” J. Compos. Constr., 554–565.
Sasani, M. (2008). “Response of a reinforced concrete infilled-frame structure to removal of two adjacent columns.” Eng. Struct., 30(9), 2478–2491.
Sasani, M., Bazan, M., and Sagiroglu, S. (2007). “Experimental and analytical progressive collapse evaluation of actual reinforced concrete structure.” ACI Struct. J., 104(6), 731–739.
Sasani, M., Kazemi, A., Sagiroglu, S., and Forest, S. (2011). “Progressive collapse resistance of an actual 11-story structure subjected to severe initial damage.” J. Struct. Eng., 893–902.
Sasani, M., and Sagiroglu, S. (2008). “Progressive collapse resistance of hotel San Diego.” J. Struct. Eng., 478–488.
Sasani, M., and Sagiroglu, S. (2010). “Gravity load redistribution and progressive collapse resistance of 20-story reinforced concrete structure following loss of interior column.” ACI Struct. J., 107(6), 636–644.
Stinger, S. M., and Orton, S. L. (2013). “Experimental evaluation of disproportionate collapse resistance in reinforced concrete frames.” ACI Struct. J., 110(3), 521–529.
Tian, Y., and Su, Y. (2011). “Dynamic response of reinforced concrete beams following instantaneous removal of a bearing column.” Int. J. Concr. Struct. Mater., 5(1), 19–28.
Xiao, Y., Kunnath, S., Li, F. W., Zhao, Y. B., Lew, H. S., and Bao, Y. (2015). “Collapse test of three-story half-scale reinforced concrete frame building.” ACI Struct. J., 112(4), 429–438.
Yap, S. L., and Li, B. (2011). “Experimental investigation of reinforced concrete exterior beam-column subassemblages for progressive collapse.” ACI Struct. J., 108(5), 542–552.
Yi, W. J., He, Q. F., Xiao, Y., and Kunnath, S. K. (2008). “Experimental study on progressive collapse-resistant behavior of reinforced concrete frame structures.” ACI Struct. J., 105(4), 433–439.
Yu, J., and Tan, K. H. (2013). “Structural behavior of RC beam-column subassemblages under a middle column removal scenario.” J. Struct. Eng., 233–250.
Information & Authors
Information
Published In
Journal of Composites for Construction
Volume 21 • Issue 1 • February 2017
Copyright
©2016 American Society of Civil Engineers.
History
Received: Jan 12, 2016
Accepted: Apr 19, 2016
Published online: Jul 5, 2016
Discussion open until: Dec 5, 2016
Published in print: Feb 1, 2017
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.