Abstract
Concentrically braced frames are earthquake resistant systems commonly used in buildings. Seismic behavior of this type of structures is affected by their configurations, brace properties, and brace to gusset plate connections. In this paper, the results of three experiments conducted to investigate the cyclic behavior of concentrically braced frames with braces built-up of double channels are reported. Significant damage was observed in beam to column connections. Large out of plane deformation of braces caused some cracks in the connector welds; however they did not result in fracture. Although large drift was applied to the frames, no brace fracture was observed. Furthermore, experiments showed that the majority of compressive strength in post-buckling state and a noticeable portion of tensile strength originated from frame action. By choosing connector spacing as the main parameter and using finite element models, a parametric study was performed to investigate the effect of this parameter on this type of frames with two different details of brace to gusset plate connections. It is observed that reducing the connector spacing increases the inelastic strain demand in braces and decreases it in gusset plates. However, gusset plates, which accommodate 2t linear clearance, are less dependent on connector spacing, compared to those accommodating 6t elliptical clearance. It seems that the limitations of slenderness ratio of individual section, stipulated in current seismic provisions, need further study.
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References
AISC (2010a). “Seismic Provisions for Structural Steel Buildings”. ANSI/AISC 341-10 American Institute of Steel constructions, Chicago, Illinois.
AISC (2010b). “Specification for Structural Steel Buildings”. ANSI/AISC 360-10, American Institute of Steel constructions, Chicago, Illinois
Astaneh-Asl, A. (1982). “Cyclic Behavior of Double Angle Bracing Members with End Gusset Plates”.
Astaneh-Asl, A. (1998). “Seismic Design and Behavior of Gusset Plates”. Structural Steel and Educational Council {Steel Tips}, 209.
Astaneh-Asl, A., & Goel, S. C. (1984). “Cyclic in-Plane Buckling of Double Angle Bracing”. Journal of Structural Engineering, 110(9), 2036–2055.
ATC (Applied Technology Council). (1992). “Guidelines for Cyclic Seismic Testing of Components of Steel Structures for Buildings.”
Fell, B. V., Kanvinde, A. M., Deierlein, G. G., & Myers, A. T. (2009). “Experimental Investigation of Inelastic Cyclic Buckling and Fracture of Steel Braces”. Journal of Structural Engineering, 135(1), 19–32.
Hsiao, P. C., Lehman, D. E., & Roeder, C. W. (2013). “A model to simulate special concentrically braced frames beyond brace fracture”. Earthquake engineering & structural dynamics, 42(2), 183–200.
Jiang, Y., Tremblay, R., & Tirca, L. (2012). “Seismic Assessment of Deficient Steel Braced Frames with Built-Up Back-to-Back Double Angle Brace Sections Using Opensees Modelling”. Proceedings of the 15WCEE.
Lai, J. W., & Mahin, S. A. (2014). “Steel Concentrically Braced Frames Using Tubular Structural Sections as Bracing Members: Design, Full-Scale Testing and Numerical” Simulation. International Journal of Steel Structures, 14(1), 43–58.
Lee K and Bruneau M (2008a). “Seismic Vulnerability Evaluation of Axially Loaded Steel Built-up Laced Members II: Evaluations,” Earthquake Engineering and Engineering Vibration, 7(2), pp. 113–124
Lee K and Bruneau M (2008b), “Seismic Vulnerability Evaluation of Axially Loaded Steel Built-up Laced Members II: Evaluations,” Earthquake Engineering and Engineering Vibration, 7(2), pp. 125–136
Lee, K., & Bruneau, M. (2005). “Energy Dissipation of Compression Members in Concentrically Braced Frames: Review of Experimental Data”. Journal of structural engineering, 131(4), 552–559..
Lee, Kangmin, and Michel Bruneau. (2008) “Seismic vulnerability evaluation of axially loaded steel built-up laced members II: evaluations.”Earthquake Engineering and Engineering Vibration 7.2, pp. 125–136.
Lehman, D. E., Roeder, C. W., Herman, D., Johnson, S., & Kotulka, B. (2008). “Improved seismic performance of gusset plate connections”. Journal of Structural Engineering, 134(6), pp. 890–901.
Lumpkin, E. J., Hsiao, P. C., Roeder, C. W., Lehman, D. E., Tsai, C. Y., Wu, A. C.,... & Tsai, K. C. (2012). “Investigation of the Seismic Response of Three-Story Special Concentrically Braced Frames.” Journal of Constructional Steel Research, 77, pp. 131–144.
Roeder, C. W., Lumpkin, E. J., & Lehman, D. E. (2011). “A Balanced Design Procedure for Special Concentrically Braced Frame Connections.” Journal of Constructional Steel Research, 67(11), pp. 1760–1772.
Simulia, ABAQUS Finite Element Analysis, www.simulia.com, 2011
Stoakes, C. D., & Fahnestock, L. A. (2010). “Cyclic Flexural Testing of Concentrically Braced Frame Beam-Column Connections”. Journal of Structural Engineering, 137(7), pp. 739–747.
Tremblay, R. (2002). “Inelastic Seismic Response of Steel Bracing Members.” Journal of Constructional Steel Research, 58(5), pp. 665–701.
Uriz, P. (2005). “Towards earthquake resistant design of concentrically braced steel structures.” University of California, Berkeley.
Yoo, J. H., Roeder, C. W., & Lehman, D. E. (2008). “Analytical Performance Simulation of Special Concentrically Braced Frames.” Journal of structural engineering, 134(6), pp. 881–889.
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Nader Naderpour, M., Aghakouchak, A.A. & Izadi, A. Cyclic behavior of concentrically braced frames with built-up braces composed of channel sections. Int J Steel Struct 17, 1391–1403 (2017). https://doi.org/10.1007/s13296-017-1210-0
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DOI: https://doi.org/10.1007/s13296-017-1210-0