Axial Compressive Behavior of Concrete-Encased High-Strength Steel Angle Columns
Publication: Journal of Structural Engineering
Volume 147, Issue 4
Abstract
This study investigated the compressive behavior of concrete-encased high-strength steel angle columns (). Axial compressive tests were performed on six composite columns with different angle sections and confinement details. The results showed that the failure mode of the columns was local buckling of the angle legs and crushing of the confined core. Local buckling and concrete confinement significantly affected the compressive strength and ductility. The test strengths were compared with the theoretical strengths computed using the plastic stress distribution method. For analytical investigation, effective stress–strain models of the steel angle and concrete are proposed to account for the local buckling, spalling, and confinement. Through the strain-compatibility analysis based on the proposed models, the contributions of the angles, unconfined cover, and confined core to the compressive strength varying with deformation were investigated. Based on the investigation results, recommendations for the design and detailing of concrete-encased high-strength steel angle columns are given.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This work was supported by the National Research Foundation of Korea (2019R1F1A1059248 and 2018R1A6A1A070258).
References
ACI (American Concrete Institute). 2019. Building code requirements for structural concrete. Farmington Hills, MI: ACI.
AISC (American Institute of Steel Construction). 2016. Specification for structural steel building. AISC 360. Chicago: AISC.
Architectural Institute of Korea. 2016. Korean building code—Structural. KBC-2016. Seoul: Architectural Institute of Korea.
El-Tawil, S., and G. G. Deierlein. 1999. “Strength and ductility of concrete encased composite columns.” J. Struct. Eng. 125 (9): 1009–1019. https://doi.org/10.1061/(ASCE)0733-9445(1999)125:9(1009).
Eom, T.-S., H.-J. Hwang, H.-G. Park, C.-N. Lee, and H.-S. Kim. 2014. “Flexural test for steel-concrete composite members using prefabricated steel angles.” J. Struct. Eng. 140 (4): 04013094. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000898.
Eom, T.-S., J.-Y. Yang, D.-Y. Kim, J.-J. Lim, and S.-H. Lee. 2019. “Experimental investigation of bolted end-plate angle splice in encased composite columns.” Eng. Struct. 190 (Jul): 31–40. https://doi.org/10.1016/j.engstruct.2019.03.109.
Hwang, H.-J., T.-S. Eom, H.-G. Park, and S.-H. Lee. 2016. “Axial load and cyclic load tests for composite columns with steel angles.” J. Struct. Eng. 142 (5): 04016001. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001452.
Hwang, H.-J., T.-S. Eom, H.-G. Park, S.-H. Lee, and H.-S. Kim. 2015. “Cyclic loading test for beam-column connections of concrete-filled U-shaped steel beams and concrete-encased steel angle columns.” J. Struct. Eng. 141 (11): 04015020. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001242.
Kim, C.-S., and H.-J. Hwang. 2012. “Numerical investigation on load-carrying capacity of high-strength concrete-encased steel angle columns.” Int. J. Concr. Struct. Mater. 12 (1): 11. https://doi.org/10.1186/s40069-018-0238-7.
Kim, C.-S., H.-G. Park, K.-S. Chung, and I.-R. Choi. 2014. “Eccentric axial load capacity of high-strength steel-concrete composite columns of various sectional shapes.” J. Struct. Eng. 140 (4): 04013091. https://doi.org/10.1061/(ASCE)ST.1943-541X.0000879.
Kim, C.-S., H.-G. Park, H.-J. Lee, I.-R. Choi, and K.-S. Chung. 2017a. “Eccentric axial load test for high-strength composite columns of various sectional configurations.” J. Struct. Eng. 143 (8): 04017075. https://doi.org/10.1061/(ASCE)ST.1943-541X.0001803.
Kim, H. J., H. J. Hwang, H. G. Park, D. K. Kim, and J. M. Yang. 2017b. “Axial load test of prefabricated composite columns using bolt-connected steel angles.” [In Korean.] J. Korean Soc. Steel Constr. 29 (2): 147–158. https://doi.org/10.7781/kjoss.2017.29.2.147.
Kim, H. J., H. J. Hwang, H. G. Park, D. K. Kim, and J. M. Yang. 2017c. “Eccentric axial load test of prefabricated composite columns using bolt-connected steel angles.” [In Korean.] J. Korean Soc. Steel Constr. 29 (3): 249–260. https://doi.org/10.7781/kjoss.2017.29.3.249.
Lai, Z., and A. H. Varma. 2016. “Effective stress-strain relationships for analysis of noncompact and slender filled composite (CFT) members.” Eng. Struct. 124 (Oct): 457–472. https://doi.org/10.1016/j.engstruct.2016.06.028.
Lim, J.-J., and T.-S. Eom. 2020. “Compression tests of octagonal concrete-filled thin-walled tube columns.” Eng. Struct. 221 (Oct): 111082. https://doi.org/10.1016/j.engstruct.2020.111082.
Sakino, K., H. Nakahara, S. Morino, and I. Nishiyama. 2004. “Behavior of centrally loaded concrete-filled steel-tube short columns.” J. Struct. Eng. 130 (2): 180–188. https://doi.org/10.1061/(ASCE)0733-9445(2004)130:2(180).
Scott, B. D., R. Park, and M. J. N. Priestley. 1982. “Stress-strain behavior of concrete confined by overlapping hoops at low and high strain rates.” J. Proc. 79 (1): 13–27.
Thai, H.-T., B. Uy, and M. Khan. 2015. “A modified stress-strain model accounting for the local buckling of thin-walled stub columns under axial compression.” J. Constr. Steel Res. 111 (Aug): 57–69. https://doi.org/10.1016/j.jcsr.2015.04.002.
Trahair, N. S., M. A. Bradford, D. A. Nethercot, and L. Gardner. 2008. The behavior and design of steel structures to EC3. 4th ed. New York: Taylor & Francis.
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Published In
Journal of Structural Engineering
Volume 147 • Issue 4 • April 2021
Copyright
© 2021 American Society of Civil Engineers.
History
Received: Oct 7, 2019
Accepted: Sep 3, 2020
Published online: Jan 25, 2021
Published in print: Apr 1, 2021
Discussion open until: Jun 25, 2021
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