000004637 001__ 4637 000004637 005__ 20141119144540.0 000004637 04107 $$aeng 000004637 046__ $$k2002-06-02 000004637 100__ $$aQiao, Pizhong 000004637 24500 $$aLATERAL BUCKLING OF FRP COMPOSITE CANTILEVER I-BEAMS 000004637 24630 $$n15.$$pProceedings of the 15th ASCE Engineering Mechanics Division Conference 000004637 260__ $$bColumbia University in the City of New York 000004637 506__ $$arestricted 000004637 520__ $$2eng$$aIn this paper, a combined analytical and experimental approach is used to characterize the lateral buckling of pultruded Fiber-Reinforced Plastic (FRP) composite cantilever I-beams. An energy method based on nonlinear plate theory is developed, and it includes shear effects and bending-twisting coupling. Three types of buckling mode shape functions, which all satisfy the cantilever beam boundary conditions, are used to derive the critical buckling loads. The effects of tip-load position, fiber orientation and fiber volume fraction on the critical buckling loads are investigated. Four common FRP I-beams with different cross-sectional geometries and various span lengths are experimentally tested, and the critical buckling loads are measured. A good agreement among the proposed analytical method, experimental testing and finite-element modeling is observed, and simplified explicit equations for lateral buckling of cantilever I-beams with the applied load at the centroid of the cross-section are formulated. The proposed analytical solution can be used to predict the lateral buckling loads for FRP cantilever I-beams and to assist practitioners to perform buckling analyses of customized FRP shapes as well as to optimize innovative sections. 000004637 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb. 000004637 653__ $$aFRP beams, lateral buckling, numerical analysis, experiments 000004637 7112_ $$a15th ASCE Engineering Mechanics Division Conference$$cNew York (US)$$d2002-06-02 / 2002-06-05$$gEM2002 000004637 720__ $$aQiao, Pizhong$$iZou, Guiping$$iDavalos, Julio F. 000004637 8560_ $$ffischerc@itam.cas.cz 000004637 8564_ $$s254306$$uhttp://invenio.itam.cas.cz/record/4637/files/096.pdf$$yOriginal version of the author's contribution as presented on CD, . 000004637 962__ $$r4594 000004637 980__ $$aPAPER