Novel design equations for shear strength of local web-post buckling in cellular beams

Novel simplified equations for Vierendeel design of beams with (elongated) circular openings

“…The imperfections contribute to the initiation of buckling in cellular beams [23], but not to Vierendeel failure. The failure load was evaluated through nonlinear analysis by using the Newton-Raphson iterative method and the arc-length method.…”

“…The FE models were simulated with ANSYS software [21] using the four-node shell element (Shell181) for a steel beam [22,23]. The element sizes from H/25 to H/20 were selected based on a sensitivity study of the load-deflection curve.…”

“…For steel beams with multiple openings such as cellular beams, the spacing between adjacent openings also affects the beam failure. Cellular beams with close spacing, s/d o b 1.5, tend to fail by web-post buckling [23]. The labeling of these models works as follows.…”

Numerical and analytical analyses of high-strength steel cellular beams: A discerning approach

“…Erdal and Saka [6] tested 12 cellular beams and found that 6 beams failed by WPB and two beams failed by combined WPB and VB. Panedpojaman et al [7] tested 9 cellular beams with different geometries and loading conditions (i.e. one or two point loads) and found that seven beams failed by WPB and two beam failed by combined WPB and LTB.…”

A meshfree unit-cell method for effective planar analysis of cellular beams

“…[12]). However, in considering the local buckling of web elements, simplified models were adopted [13][14][15][16][17] , utilising for example a strut buckling analogy with empirical calibration against nonlinear finite element models [18][19][20]. While the resulting simplified models are computationally efficient, these are not rational and sufficiently general for application to a wide range 3 of cellular beam geometric configurations, as they ignore both the nonlinear planar stress distribution and the two-dimensional plate buckling behaviour of the web components.…”