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A simplified method for stability analysis of multi-story frames considering vertical interactions between stories
- Source :
- Advances in Structural Engineering. 19:599-610
- Publication Year :
- 2016
- Publisher :
- SAGE Publications, 2016.
-
Abstract
- Effective length method is still widely used in engineering practice to evaluate the stability of compression members in frame structures. However, the conventional effective length method can be inaccurate in many cases as it considers columns in isolation from the stories above and below. This article proposes an improved method for simplified frame stability analysis that accounts for the vertical interaction effects of columns. The idealized sub-assemblage model includes the columns of all stories and their restraining beams. The stability matrix for a single-story unit is first derived, and then the system stability matrix is obtained by considering the compatibility of the story units. The governing equation for the elastic buckling load of the sub-assemblage is derived. The method is applicable to both sway-permitted and sway-prevented frames. The applicability and accuracy of the proposed method are demonstrated using a series of examples with a wide variation of parameters including numbers of story, boundary conditions, stiffness of beam-to-column connections, column length and stiffness, and axial force level.
- Subjects :
- Engineering
business.industry
0211 other engineering and technologies
System stability
020101 civil engineering
Improved method
02 engineering and technology
Building and Construction
Structural engineering
Variation of parameters
Governing equation
Effective length
0201 civil engineering
Buckling
021105 building & construction
Compatibility (mechanics)
Hurwitz matrix
business
Civil and Structural Engineering
Subjects
Details
- ISSN :
- 20484011 and 13694332
- Volume :
- 19
- Database :
- OpenAIRE
- Journal :
- Advances in Structural Engineering
- Accession number :
- edsair.doi...........a64f5ba6314bc9737069a60b2b9efdde
- Full Text :
- https://doi.org/10.1177/1369433216630191