Date of Award
Doctor of Philosophy (PhD)
Gene J. Hou
Mojtaba B. Sirjani
Shahin N. Amiri
This dissertation presents an experimental and theoretical study of the lateral-torsional instability and biaxial flexure of Glass Fiber Reinforced Polymer (GFRP) beams including warping and shear deformation effects. The theoretical analysis is based on three simultaneous differential equations of equilibrium with new terms added to account for shear deformation effects. To solve these equations, algorithms based upon a central finite-difference approach are then developed. The experimental study is conducted on a series of single- and multi-span beams subjected to concentrated loads. The predicted beam behavior agreed well with that observed experimentally. The investigation revealed that the ASCE-LRFD Prestandard for pultruded GFRP beams can result in seriously unconservative buckling load predictions. The same is found for biaxially loaded beams which can develop very large induced warping normal stresses currently unaccounted for by the ACSE-LRFD Prestandard. A new lateral-torsional buckling load equation is presented which accounts for shear deformation effects.
Hampton, Waverly G..
"Lateral-Torsional Instability and Biaxial Flexure of Continuous GFRP Beams Including Warping and Shear Deformations"
(2020). Doctor of Philosophy (PhD), Thesis, Civil/Environmental Engineering, Old Dominion University, DOI: 10.25777/asg3-cm38