An efficient and direct method for out-of-plane buckling analysis of Y-braced steel frames

Saffari, Hamed; Yazdi, H. Mosalman

doi:10.1016/j.jcsr.2010.03.012

Cited by 10 publications

(4 citation statements)

References 12 publications

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“…Finally, by imposing the boundary conditions of the brace element's connections, the equations are simplified [27,28]: where M 1 and M 2 are the end moments of each element by considering the slopes of the members θ 1 and θ 2 . V, F , E , Iand l are the shear force, axial force, module of elasticity, moment of inertia and length of the element, respectively.…”

Section: Theoretical Calculations Of Buckling Loadmentioning

confidence: 99%

Optimization of Off-Centre bracing system using Genetic Algorithm

Yazdi

Sulong

2011

Journal of Constructional Steel Research

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Section: Theoretical Calculations Of Buckling Loadmentioning

confidence: 99%

Optimization of Off-Centre bracing system using Genetic Algorithm

Yazdi

Sulong

2011

Journal of Constructional Steel Research

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“…If it is solved based on the free lateral displacement frame columns, the results will be conservative. To solve these problems, some researchers conducted studies [4][5][6][7][8][9][10][11][12][13][14]. Among them, Chen [6] and Mageirou [7], investigated the stability of braced frame columns and derived formulas to compute the effective length coefficient of frame columns with arbitrary bracing stiffness through computer calculations.…”

Section: Introductionmentioning

confidence: 99%

A Simplified Method for Analyzing Overall Stability of Flexural-Type Braced Frame Structures

2023

Teh. vjesn.

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It is difficult to determine the effective length coefficient of weakly braced frame columns using the effective length coefficient method. When the stability of braced frame structures is calculated using the effective length coefficient method, it cannot reflect the effect of the brace on the frame, the mutual support of columns on the same floor, and vertical interactions between different floors, which is easy to lead to unreasonable design. In this study, based on a spring-rocking column model, the structural transformation concept was used to transform the second-order problem of determining the critical force of braced frame structures into a first-order problem of calculating the lateral stiffness of the structure. First, the repetitive frame element was used to obtain the lateral stiffness of each floor, and the second-order effect coefficient was used to determine the load stiffness of the floor. Next, the lateral stiffness and load stiffness of each floor was assembled. Finally, the principle in which the load stiffness reduces the lateral stiffness of the structure to zero when the braced frame structure buckles laterally were applied to derive a formula to directly calculate the critical force of the flexural-type brace frame structure. This formula reflects the interactions between the braced structure and the frame, the mutual support of columns on the same floor, and the vertical interactions between different floors. Therefore, it can compensate for the deficiency in which the criterion cannot calculate the critical force of braced frame structures and is suitable for quantitatively analyzing the vertical interactions between different floors of braced frame structures.

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“…Compared with X, V or single diagonal bracings, it is more complicated to determine the buckling lengths of the three brace members in Y-bracing with rigid connections. Saffari and Yazdi (2010) used slope-deflection equations modified by stability functions for the case of Y-bracing with rigid connections at the convergence point and simple connections at frame corners.…”

Section: Introductionmentioning

confidence: 99%

Out-of-plane buckling of Y-braced frames with rigid joints

Zamani

Vafai

Kazemi

2013

Proceedings of the Institution of Civil Engineers - Structures

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Because of the complicated buckling characteristics of Y-shaped bracings, calculation of their strength is beyond routine engineering procedures. A method based on slope-deflection equations incorporating stability functions has been used for computation of buckling eigenvalues and effective length factors. Lateral strength is computed based on the least buckling strength of bracing members. This study is limited to bracings with similar sections and fixed end connections resisting out-of-plane rotation. Lateral strengths predicted by the analytical method for two cases are compared with experimental results on full-scale specimens. It is shown that the proposed analytical method predicts the real strength with a good precision for practical purposes.

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An efficient and direct method for out-of-plane buckling analysis of Y-braced steel frames

Cited by 10 publications

References 12 publications

Optimization of Off-Centre bracing system using Genetic Algorithm

Optimization of Off-Centre bracing system using Genetic Algorithm

A Simplified Method for Analyzing Overall Stability of Flexural-Type Braced Frame Structures

Out-of-plane buckling of Y-braced frames with rigid joints

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