Lateral-Torsional Buckling of Singly Symmetric I-Beams

Equivalent uniform moment factors for lateral–torsional buckling of steel members

“…Finally, in the context of the ECCS-Validation Group, which is in charge of reviewing specifications for members in bending to be used in the Eurocode for steel structures, Greiner et al [11] and Salzgeber [24] provide equivalent uniform factors for a very complete set of moment diagrams. Results for monosymmetric beams may be found in the work of Baláz and Koleková [3] and Helwig et al [12]. Moreover, beams with top bracing and bottom bracing have been considered in Park and Kang [21], Park et al [22] and Greiner et al [11].…”

Modification of C-equation in the SSRC Guide for buckling of monosymmetric I-beams under transverse loads

“…4(a) and (b) also show that when the transverse loads are applied at any fixed height on the cross-section of monosymmetric I-beams, the C m is not sensitive to the degree of monosymmetry. This observation can also be supported by using the Wang and Kitipornchai [20] and Helwig et al [6].…”

“…Nethercot and Rockey [13] considered four types of end restraint and three transverse loading levels (top flange, shear centre and bottom flange) in order to calculate the buckling capacity of doubly symmetric beams. More recently, Helwig et al [6] presented the simplified moment gradient correction factor for simply supported monosymmetric I-beams subjected to transverse loading applied at different heights on the cross-section. Suryoatmono and Ho [16], using finite difference technique, proposed closed-form solutions of the moment gradient correction factor for doubly symmetric beams subjected to a few loading cases.…”

Elastic lateral buckling of simply supported LiteSteel beams subject to transverse loading

“…However, Pi et al (1999) reported that AS4100 modification factors are not accurate for cold-formed Z-sections. , , Helwig et al (1997), and Lim et al (2003) also showed that the accuracy of moment modification factors varied depending on the section geometry of even the hot-rolled sections such as mono-symmetric I-beams and Tee beams.…”