Experimental study on flexural performance of GFRP profile-wood composite beams

To solve the problems of single combination form and insufficient material utilization of glass fiber reinforced polymer（GFRP）-wood beams,three different combination forms of GFRP-wood beams,including the plate form,slot form and inverted T form GFRP-wood beams were proposed.Taking production process and combined form as parameter variables,six GFRP-wood beams were designed and tested.The results show that according to the test phenomena,the failure of the GFRP-wood beams can be divided into three types,including the tension fracture of the GFRP or wood,wrinkling instability of the wood and the longitudinal shear failure of the GFRP-wood beams.The ultimate load carrying capability of the GFRP-wood beam increases by 67.04% compared with the reference wood beam,and increases by 26.43% compared with the reference GFRP beam,respectively,indicating the combined effect is substantial.Among the three combination forms,the slot form GFRP-wood beams has the best mechanical property.However,the wood defects in the web zone can cause a reduction of the stiffness and strength of the GFRP-wood beams.The study result enriches the section form of GFRP-wood beams and production method,and improves the combined effect of the composite beams,which provides some reference for engineering application of similar beams.