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Abstract
Lateral torsional buckling of doubly symmetric I-shaped steel members under linear moment gradient
Highlights
In the design practice of steel members under flexure, local buckling potential and the post buckling resistance, the yield and/or rupture strength of cross-section have been significant parameters for structural engineers
Analysis results show that lateral torsional buckling is a key issue for doubly symmetric I-shaped steel members that are under flexure and it is reflected satisfactorily with the proposed method considering the design codes and standards, approaches from the literature and finite element analysis results
1) Lateral torsional buckling is a key issue for I-shaped steel members that are under linear moment gradient and it is reflected satisfactorily with the proposed function considering finite element analysis results, methods from literature and design codes and standards, 2) According to the numerical example of the study; critical moment values for TS 4561 and AS 4100 are slightly low when compared other specification results
Summary
In the design practice of steel members under flexure, local buckling potential and the post buckling resistance, the yield and/or rupture strength of cross-section have been significant parameters for structural engineers. Lateral torsional buckling, where the deformation changes from predominantly in-plane bending to combined lateral deflection and twisting, is one of the most important stability problems and should be controlled in the design phase of steel structural members. Despite the fact that lateral torsional buckling is a key issue in structural steel design, the analytical aspects of determining lateral torsional buckling strength have been complex and closed form solutions exist only for few cases. Several design standards and codes have offered equations and approximations in order to calculate lateral torsional buckling behavior of steel members [2]. Because of its important effect on the design of steel structures, researchers maintain to investigate lateral torsional buckling from different aspects [3],[4].
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