Hochbelastbare CFK-Biege- und CFK-Querkraftträger: Angepasste Balkentheorien höherer Ordnung

Highly loaded CFRP-beams: Adapted higher-order beam theories.

Load carrying beam structures with rectangular or I-shaped cross-sections are very common in steel constructions, but in the case of webs and flanges made of modern CFRP composite laminates an adapted new structural modeling is required in order to take into account the peculiarities of the typically anisotropic light weight material CFRP. In the framework of the joint project "Large high-strength fiber-reinforced polymer beams", funded by the German Research Foundation, adapted higher-order beam theories have been formulated and implemented on the basis of rather general kinematical assumptions with segment-wise displacement representations for the webs and the flanges. Herewith the peculiarities of very different laminate layups can be taken into account properly. In many cases the beam deformations and stresses even can be given in a closed-form analytical manner, otherwise at least a semi-analytical description is possible. In particular in regard of parameter studies and in regard of a well-aimed beam optimization this is a big advantage.