Improving Behavior of Reinforced Concrete Frames to Resist Progressive Collapse through Steel Bracings
Publication: Journal of Structural Engineering
Volume 145, Issue 2
Abstract
External installation of steel braces has been proved an effective seismic strengthening or retrofitting scheme to upgrade the lateral load-resisting capacity of reinforced concrete (RC) frames. However, the effectiveness of steel bracing in improving the progressive collapse resistance potential of RC frames is vague. To fill the gap, five one-quarter-scaled specimens (one bare frame and four braced frames) were tested subject to a pushdown loading regime. The RC frames were nonseismically detailed for reference. Four braced frames with different bracing configurations were tested to evaluate the efficiency of braces for upgrading the load-resisting capacity of RC frames. A rational design method was implemented for designing the braced frames, including the connections between the braces and RC frames. Experimental results proved that steel bracing could increase the first peak load and initial stiffness of the frames significantly. Before mobilization of catenary action in RC frames, the tensile braces were fractured, but the compressive braces experienced severe buckling. Consequently, the braced specimens performed similarly to the bare frame in the catenary action stage.
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References
ACI (American Concrete Institute). 2011. Building code requirements for structural concrete (ACI 318-11) and commentary (318R-11). ACI Committee 318. Farmington Hills, MI: ACI.
AISC. 2005a. Seismic provisions for structural steel buildings. ANSI/AISC 341-05. Chicago: AISC.
AISC. 2005b. Specifications for structural steel buildings. ANSI/AISC 360-05. Chicago: AISC.
Badoux, M., and J. O. Jirsa. 1990. “Steel bracing of RC frames for seismic retrofitting.” J. Struct. Eng. 116 (1): 55–74. https://doi.org/10.1061/(ASCE)0733-9445(1990)116:1(55).
Bush, T. D., E. A. Jones, and J. O. Jirsa. 1991. “Behavior of RC frame strengthened using structural-steel bracing.” J. Struct. Eng. 117 (4): 1115–1126. https://doi.org/10.1061/(ASCE)0733-9445(1991)117:4(1115).
Choi, H., and J. Kim. 2011. “Progressive collapse-resisting capacity of RC beam–column sub-assemblage.” Mag. Concr. Res. 63 (4): 297–310. https://doi.org/10.1680/macr.9.00170.
Dat, P. X., and K. H. Tan. 2013. “Experimental study of beam-slab substructures subjected to a penultimate-internal column loss.” Eng. Struct. 55: 107–115. https://doi.org/10.1016/j.engstruct.2011.08.039.
Fu, F. 2009. “Progressive collapse analysis of high-rise building with 3-D finite element modeling method.” J. Constr. Steel Res. 65 (6): 1269–1278. https://doi.org/10.1016/j.jcsr.2009.02.001.
Hallquist, J. O. 2008. LS-DYNA, V. 971, keyword user’s manual. Livermore: Livermore Software Technology Corporation.
Izzuddin, B. A., A. G. Vlassis, A. Y. Elghazouli, and D. A. Nethercot. 2008. “Progressive collapse of multi-storey buildings due to sudden column loss—Part I: Simplified assessment framework.” Eng. Struct. 30 (5): 1308–1318. https://doi.org/10.1016/j.engstruct.2007.07.011.
Khandelwal, K., S. EI-Tawil, and F. Sadek. 2009. “Progressive collapse analysis of seismically designed steel braced frames.” J. Constr. Steel Res. 65 (3): 699–708. https://doi.org/10.1016/j.jcsr.2008.02.007.
Li, S., S. D. Shan, C. H. Zhai, and L. L. Xie. 2016. “Experimental and numerical study on progressive collapse process of RC frames with full-height infill walls.” Eng. Fail. Anal. 59: 57–68. https://doi.org/10.1016/j.engfailanal.2015.11.020.
Li, Y., X. Z. Lu, H. Guan, and L. P. Ye. 2014. “Progressive collapse resistance demand of RC frames under catenary mechanism.” ACI Struct. J. 111 (5): 1225–1234. https://doi.org/10.14359/51687029.
Liu, T., Y. Xiao, J. Yang, and B. S. Chen. 2017. “CFRP strip cable retrofit of RC frame for collapse resistance.” J. Compos. Constr. 21 (1): 04016067. https://doi.org/10.1061/(ASCE)CC.1943-5614.0000722.
Maheri, M. R., and A. Sahebi. 1997. “Use of steel bracing in reinforced concrete frames.” Eng. Struct. 19 (12): 1018–1024. https://doi.org/10.1016/S0141-0296(97)00041-2.
Masri, A. C., and S. C. Goel. 1996. “Seismic design and testing of an RC slab–column frame strengthened by steel bracing.” Earthquake Spectra 12 (4): 645–666. https://doi.org/10.1193/1.1585904.
Pham, A. T., K. H. Tan, and J. Yu. 2017. “Numerical investigations on static and dynamic responses of reinforced concrete sub-assemblages under progressive collapse.” Eng. Struct. 149: 2–20. https://doi.org/10.1016/j.engstruct.2016.07.042.
Qian, K., and B. Li. 2012. “Experimental and analytical assessment on RC interior beam-column subassemblages for progressive collapse.” J. Perform. Constr. Facil. 26 (5): 576–589. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000284.
Qian, K., and B. Li. 2015a. “Research advances in design of structures to resist progressive collapse.” J. Perform. Constr. Facil. 29 (5): B4014007. https://doi.org/10.1061/(ASCE)CF.1943-5509.0000698.
Qian, K., and B. Li. 2015b. “Strengthening of multibay reinforced concrete flat slabs to mitigate progressive collapse.” J. Struct. Eng. 141 (6): 04014154. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001125.
Qian, K., and B. Li. 2017. “Effects of masonry infill wall on the performance of RC frames to resist progressive collapse.” J. Struct. Eng. 143 (9): 04017118. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001860.
Qian, K., B. Li, and J. Ma. 2015. “Load-carrying mechanism to resist progressive collapse of RC buildings.” J. Struct. Eng. 141 (2): 04014107. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001046.
Ren, P., Y. Li, X. Lu, H. Guan, and Y. L. Zhou. 2016. “Experimental investigation of progressive collapse resistance of one-way reinforced concrete beam–slab substructures under a middle-column-removal scenario.” Eng. Struct. 118: 28–40. https://doi.org/10.1016/j.engstruct.2016.03.051.
Richard, R. M. 1986. “Analysis of large bracing connection designs for heavy construction.” In Proc., National Steel Construction Conf., 1–24. Chicago: AISC.
Sadek, F., J. A. Main, H. S. Lew, and Y. H. Bao. 2011. “Testing and analysis of steel and concrete beam-column assemblies under a column removal scenario.” J. Struct. Eng. 137 (9): 881–892. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000422.
Sasani, M., and J. Kropelnicki. 2008. “Progressive collapse analysis of an RC structure” Struct. Des. Tall Spec. Build. 17 (4): 757–771. https://doi.org/10.1002/tal.375.
Su, Y. P., Y. Tian, and X. S. Song. 2009. “Progressive collapse resistance of axially-restrained frame beams.” ACI Struct. J. 106 (5): 600–607.
Tsai, M. H., and T. C. Huang. 2009. “Effect of interior brick-infill partitions on the progressive collapse potential of a RC building: Linear static analysis results.” World Acad. Sci. Eng. Technol. 3 (2): 108–114.
Tsai, M. H., and B. H. Lin. 2008. “Investigation of progressive collapse resistance and inelastic response for an earthquake-resistant RC building subjected to column failure.” Eng. Struct. 30 (12): 3619–3628. https://doi.org/10.1016/j.engstruct.2008.05.031.
Youssef, M. A., H. Ghaffarzadeh, and M. Nehdi. 2007. “Seismic performance of RC frames with concentric internal steel bracing.” Eng. Struct. 29 (7): 1561–1568. https://doi.org/10.1016/j.engstruct.2006.08.027.
Yu, J., L. Z. Luo, and Y. Li. 2018. “Numerical study of progressive collapse resistance of RC beam-slab substructures under perimeter column removal scenario.” Eng. Struct. 159: 14–27. https://doi.org/10.1016/j.engstruct.2017.12.038.
Yu, J., and K. Tan. 2013. “Structural behavior of RC beam-column subassemblages under a middle column removal scenario.” J. Struct. Eng. 139 (2): 233–250. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000658.
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Published In
Journal of Structural Engineering
Volume 145 • Issue 2 • February 2019
Copyright
©2018 American Society of Civil Engineers.
History
Received: Oct 30, 2017
Accepted: Aug 15, 2018
Published online: Nov 30, 2018
Published in print: Feb 1, 2019
Discussion open until: Apr 30, 2019
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