Tensile forces for seismic design of braced frame connections — Experimental results

Fell, Benjamin; Kanvinde, Amit

doi:10.1016/j.jcsr.2009.10.002

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…The effect of filling HSS braces with concrete to delay or prevent local buckling has been studied by many researchers. [10][11][12]22] The previous studies indicated that the concrete infill could delay and reduce the local buckling severity. [3] HSS braces buckle inward and outward resulting in high strain concentrations.…”

Section: Behavior Of Hss and Cft Bracesmentioning

confidence: 99%

“…[4][5][6][7][8] Han et al [9] experimentally investigated the ductility of square-HSS braces. Fell et al [10] and Fell and Kanvinde [11] conducted a series of experimental studies on square-HSS, circular-HSS, and wide-flange braces. To evaluate the effect of concrete core presence, the behavior of HSS and CFT braces was experimentally and numerically investigated by Broderick et al, [12] Sheehan and Chan, [13] and Ebrahimi et al [14] Schneider, [15] Shams and Saadeghvaziri, [16] and Huang et al [17] investigated the ultimate capacity of CFT columns by considering the parameters of cross-section shapes and thickness.…”

Section: Introductionmentioning

confidence: 99%

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Experimental evaluation of composite and non‐composite columns and braces in special concentrically braced frames

Ebrahimi

Mirghaderi

Zahrai

2022

Structural Design Tall Build

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Hollow structural section (HSS) and concrete-filled tube (CFT) cross-sections have been widely employed in the columns and braces of special concentrically braced frames (SCBFs). Square-HSS cross-section widely used in multistory frames is filled with concrete and converted to square-CFT cross-section to enhance the behavior of this cross-section. However, some investigations indicated that circular-HSS cross-section filled with concrete (circular-CFT) showed better behavior in comparison with square-CFT cross-section due to more uniform and larger concrete confinement in circular-CFT cross-section. The current study was experimentally undertaken to evaluate (1) the seismic performance and the global and local hysteresis responses of HSS and CFT members with various cross-section shapes from initial elastic range to collapse in the system level of multistory SCBFs, (2) the behavioral differences between square cross-section and circular cross-section, and (3) the behavioral differences between HSS cross-sections and CFT cross-sections employed in the columns and braces of SCBFs. Four full-scale one-bay, two-story SCBFs with four various cross-sections, namely, square-HSS, circular-HSS, square-CFT, and circular-CFT, for columns and braces were subjected to cyclic lateral loading. Evaluating base shearroof drift hysteretic loops of SCBF specimens demonstrated that SCBF specimens with CFT columns and braces (CFT-SCBFs) experienced respectively around 107%, 58%, 28%, and 152% higher stiffness, post-yielding and post-buckling strengths, ductility, and energy dissipation capacity than SCBF specimens with HSS columns and braces (HSS-SCBF). In addition, the experimental observations indicated that CFT braces experienced local buckling initiation, crack initiation, and fracture at respectively 2.22, 2.35, and 2.32 times of roof drifts of those exhibited by HSS braces.Moreover, assessing braces with various cross-sections indicated that CFT braces showed an increase in compression strength, post-buckling strength, compression axial deformation, and out-of-plane buckling approximately by 83%, 152%, 127%, and 100%, respectively, in comparison with HSS braces. Finally, square-HSS/CFT braces sustained rupture propagation better than circular-HSS/CFT braces.

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Section: Behavior Of Hss and Cft Bracesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental evaluation of composite and non‐composite columns and braces in special concentrically braced frames

Ebrahimi

Mirghaderi

Zahrai

2022

Structural Design Tall Build

View full text Add to dashboard Cite

show abstract

“…One means of enhancing reserve capacity of the frames is to introduce partialstrength beam-to-column connections with top and seat angles in the gravity frame of the building, as illustrated in Figure 1b. Nonlinear time-history analyses have shown that the moment frame action that develops in the gravity frame and the compression response of the braces after brace connection failures can contribute significantly to collapse prevention (Fell et al, 2009;Fell and Kanvinde, 2010).…”

Section: Collapse Prevention Of Low Ductility Concentrically Braced F...mentioning

confidence: 99%