Part I: Modified Buckling Factor for Columns in Braced and Unbraced Frames with Composite Girders
A. Eltawil, S., M. Abdrabou, S., S. Mahmoud, N. (2022). Part I: Modified Buckling Factor for Columns in Braced and Unbraced Frames with Composite Girders. EKB Journal Management System, 47(2), 11-22. doi: 10.21608/bfemu.2022.235650
S. A. Eltawil; S. M. Abdrabou; N. S. Mahmoud. "Part I: Modified Buckling Factor for Columns in Braced and Unbraced Frames with Composite Girders". EKB Journal Management System, 47, 2, 2022, 11-22. doi: 10.21608/bfemu.2022.235650
A. Eltawil, S., M. Abdrabou, S., S. Mahmoud, N. (2022). 'Part I: Modified Buckling Factor for Columns in Braced and Unbraced Frames with Composite Girders', EKB Journal Management System, 47(2), pp. 11-22. doi: 10.21608/bfemu.2022.235650
A. Eltawil, S., M. Abdrabou, S., S. Mahmoud, N. Part I: Modified Buckling Factor for Columns in Braced and Unbraced Frames with Composite Girders. EKB Journal Management System, 2022; 47(2): 11-22. doi: 10.21608/bfemu.2022.235650

Part I: Modified Buckling Factor for Columns in Braced and Unbraced Frames with Composite Girders

MEJ- Mansoura Engineering Journal
Article 13, Volume 47, Issue 2, March and April 2022, Page 11-22  XML PDF (1.47 MB)
Document Type: Research Studies
DOI: 10.21608/bfemu.2022.235650
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Authors
S. A. Eltawil email 1; S. M. Abdrabou2; N. S. Mahmoud3
1Msc at Structural Engineering department, Faculty of Engineering, Mansoura University, Egypt.
2Professor of Structural Engineering department, Faculty of Engineering, Mansoura University, Egypt
3Professor of Structural Engineering department, Faculty of Engineering, Mansoura University, Egypt.
Abstract
In the current paper, the influence of composite girders on modified buckling factor values was studied in braced and unbraced frames in which the composite girders' far ends were represented as fixed and rigid. Moreover, the derived formulation is based on the modified stiffness parameter and pursues the same assumptions as in the standard effective length factor (K-factor). Furthermore, the slope-deflection method was used to obtain the modified buckling factor formulae for composite girders in braced and unbraced frames. After that, the relationship between the critical buckling factor and beam length has been demonstrated for practical purposes. In addition, the composite girders' effects on effective length parameters are illuminated using illustrative examples that utilize the various girders' far-end conditions. Eventually, we can draw the conclusion that the modified stiffness factor for composite girders must be considered in the calculations of K-factor for braced and unbraced frames in order to achieve an accurate and economical design
Keywords
Stability functions; unbraced frames; The alignment charts; composite frames; braced frames; composite girders; 15% cracked analysis; stiffness coefficients; and sagging moment
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