Structures Congress 2018
Experimental Study of Cyclic Flange Local Buckling
Publication: Structures Congress 2018: Buildings and Disaster Management
ABSTRACT
Cyclic flange local buckling typically occurs when plastic hinges form in the beams and columns of special moment resisting frames subject to seismic shaking. The buckling response is affected by the significant fluctuations in axial stress that occur in such members. While local buckling in beam plastic hinges has been thoroughly investigated in the past for monotonic loading situations, the effect of cyclic flange buckling on member capacity is not yet well understood. In order to address this shortcoming, ten half-scale T-section specimens are tested under cyclic axial loading in a configuration intended to replicate the cyclic demands imposed on flanges in the plastic hinge region. The main experimental variables are the flange slenderness ratio, web restraint (varied by changing the slenderness ratio of the web of the T-section), and type of loading (monotonic versus cyclic). Test results show that the flange slenderness ratio significantly affects the degradation of axial strength as the applied deformation increases. The rates of strength degradation under both monotonic and cyclic loading schemes are compared and the results are used to evaluate current seismic design requirements for local stability of steel structures.
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ACKNOWLEDGEMENTS
This work was supported by the University of Michigan and US NSF grant numbers CMMI-1344372 and ACI-1638186. Any opinions, findings, conclusions, and recommendations expressed in this paper are those of the authors and do not necessarily reflect the views of the sponsor.
REFERENCES
AISC. (2016a). Specification for Structural Steel Buildings, ANSI/AISC 360-16, American Institute for Steel Construction, Chicago, IL.
AISC. (2016b). Seismic Provisions for Structural Steel Buildings, ANSI/AISC 341-16, American Institute for Steel Construction, Chicago, IL.
Bansal, J. P. (1971). “The Lateral Instability of Continuous Steel Beams.” CESRL Dissertation No. 71-1, University of Texas, Austin, TX.
Cheng, X., Chen, Y., & Nethercot, D. A. (2013). “Experimental study on H-shaped steel beam-columns with large width-thickness ratios under cyclic bending about weak-axis.” Engineering Structures, 49, 264–274.
Dawe, J. L. and Kulak, G. L. (1986). “Local Buckling Behavior of Beam-Columns.” J. Struct. Eng., ASCE, Vol. 112, No. 11, pp. 2,447–2,461.
Elkady, A., and Lignos, D. (2015). “Analytical investigation of the cyclic behavior and plastic hinge formation in deep wide-flange steel beam-columns.” Bull Earthquake Eng., 13, 1097–1118.
Elkady, A. and Lignos, D. (2016). “Dynamic Stability of Deep and Slender Wide-Flange Steel Columns – Full Scale Experiments.” Proc. of Annual Stability Conference, SSRC, Chicago, IL.
Fogarty, J., and El-Tawil, S. (2015). “Collapse resistance of steel columns under combined axial and lateral loading.” J. Struct. Eng., 04015091.
Fogarty, J., Wu, T.-Y., and El-Tawil, S. (2017). “Collapse Response and Design of Deep Steel Columns Subjected to Lateral Displacement.” J. Struct. Eng., 04017130.
Lay, M. G. (1965). “Some Studies of Flange Local Buckling in Wide-Flange Shapes.” Journal of the Structural Division, ASCE, Vol. 91, No. 6, pp. 94–116.
Uang, C. M., Ozkula, G., and Harris, J. (2015). “Observations from cyclic tests on deep, slender wide-flange structural steel beam-column members.” Proc. of Annual Stability Conference, SSRC, Chicago, IL.
Richards, P. W., and Uang, C.-M. (2005). “Effect of flange width-thickness ratio on eccentrically braced frames link cyclic rotation capacity.” J. Struct. Eng., 1546–1552.
Sawyer, H. A. (1961). “Post-Elastic Behavior of Wide-Flange Steel Beams.” Journal of the Structural Division, ASCE, Vol. 87, No. ST8, pp. 43–71.
Wu, T.-Y, El-Tawil, S., and McCormick, J. (2018). “Highly ductile limits for deep steel columns.” J. Struct. Eng., accepted.
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Published In
Structures Congress 2018: Buildings and Disaster Management
Pages: 49 - 57
Editor: James Gregory Soules, 1CB&I
ISBN (Online): 978-0-7844-8132-5
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Apr 17, 2018
Published in print: Apr 17, 2018
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