Lateral–torsional buckling resistance of coped beams

Experimental and numerical parametric study on the capacity of coped beam ends

“…LTB of end coped I-beams has been investigated by several authors [1][2][3][4][5][6][7][8][9][10]. These investigations range from classical energy solutions for general beams to FE studies on complete assemblies of beam and connections and cover cases with copes at one or both flanges and various connections, such as end-plates, partial end-plates and web angles.…”

“…These investigations range from classical energy solutions for general beams to FE studies on complete assemblies of beam and connections and cover cases with copes at one or both flanges and various connections, such as end-plates, partial end-plates and web angles. Design models use either an elastic LTB moment determined from interaction between the critical moments of the cross-section in the coped regions and the I-section of the uncoped length [5] or numerically determined reduction factors for the critical moment for various connection cases, followed by a design with the recommended buckling curves [9]. Coping has been shown to reduce the LTB resistance significantly, particularly for short beams and cases where the connection devices are not connected to the tension flange [9].…”

“…Design models use either an elastic LTB moment determined from interaction between the critical moments of the cross-section in the coped regions and the I-section of the uncoped length [5] or numerically determined reduction factors for the critical moment for various connection cases, followed by a design with the recommended buckling curves [9]. Coping has been shown to reduce the LTB resistance significantly, particularly for short beams and cases where the connection devices are not connected to the tension flange [9]. In addition, local web buckling in the coped region has been found to influence the LTB capacity significantly [7,10].…”

Experimental and finite element study on the inelastic lateral buckling behavior of coped I-beams

“…Michael and Lam [3] studied experimentally the effect of inelastic buckling of coped beams, and compared the results with the theoretical results by Cheng and Snell [2], they found the maximum reduction in strength due to the effect of residual stresses and initial imperfections to be 35% for short and braced specimens. Maljaarsa et al [4] presented numerical models to study the effect of lateral torsional buckling to (coped) beams with end plates and they recommended not to use stocky beams with large copes in combination with short end plates, as this gives the largest reduction of the ultimate buckling resistance of all studied connections. Yam et al [5] presented an experimental study of the strength and behavior of reinforced coped beams, they recommended for a coped beam section with a larger d/t w ratio, a stiffener arrangement consisting of longitudinal and transverse stiffeners.…”

Development and validation of a numerical model for buckling of coped beams

“…It might be used as an example for studies on other stability problems. In a companion paper [1] the results of a parameter study are given together with design rules for use in practice.…”