Bending behavior of wood beams strengthened with externally bonded BFRP sheets
An experimental study was conducted to investigate the bending behavior of wood beams strengthened with externally bonded basalt fiber reinforced polymer(BFRP)sheets.The experimental program consisted of twelve circular-section simply supported wood beams,including three unstrengthened beams and nine BFRP sheets strengthened beams.The main purpose of the tests was to gain a better understanding of the bending behavior and failure modes of wood beams strengthened with different methods: L(where L,bottom longitudinal layer),LRH(where,L bottom longitudinal layer,RH,radial hoop layer)and LSH(where L,bottom longitudinal layer,SH,spiral hoop layer)layer oriented strengthened beams.The experimental results indicated that the failure mode of the BFRP sheets strengthened beams was wood fiber rupture followed by BFRP sheets fracture.All BFRP sheets strengthened beams showed the higher ultimate load carrying capacity and bending stiffness than those of unstrengthened beams.Besides,the imperfect interface would be effectively restrained by the hoop,which can reduce the effect of wood defect on the flexural capacity and flexural stiffness.In terms of increasing the ultimate strength,the spiral hoop performs slightly better than radial hoop.The longitudinal strain of wood beams over the cross-section obeyed the plane-section assumption.Finally,a calculation method was presented to predict the load carrying capacity of BFRP sheets strengthened wood beams.
wood beam BFRP sheets bending behavior strengthening method
Ke.Chen Bin.Jia Tong.Liu Xue-Yuan Wang
Southwest University of Science and Technology,Mianyang 621010,China Chinese Academy of Engineering Physics,Mianyang 621900,China
国际会议
新加坡
英文
1-8
2017-07-19（万方平台首次上网日期，不代表论文的发表时间）