预应力FRP增强竹木集成材抗弯性能的初步研究  

Preliminary study on bending property of wood-bamboo structural glulam reinforced by prestressed FRP

作　　者：王希俊[1] 申士杰[1] 靳婷婷[1] 袁卉[1] 赵书平[1] 

机构地区：[1]北京林业大学材料科学与技术学院,木质材料科学与应用教育部重点实验室,北京100083

出　　处：《中南林业科技大学学报》2016年第4期116-119,共4页Journal of Central South University of Forestry & Technology

基　　金：国家林业局引进国际先进林业科学技术计划(“948”计划)项目“高强度纤维增强木质复合材料制造技术引进”(2012-4-20)

摘　　要：通过对预应力FRP增强竹木集成材的抗弯实验,研究了不同预应力FRP对集成材抗弯强度、弹性模量及中性轴的影响,实验结果表明:在预应力FRP增强竹木集成材中,30%UTS预应力FRP增强竹木集成材的抗弯强度、弹性模量及中性轴偏移最大,抗弯强度达到73.05 MPa,弹性模量7312.80 MPa,相对于无预应力FRP增强的竹木集成材中性轴向下偏移1.73 mm。并且集成材在一次破坏后,30%UTS、40%UTS预应力FRP增强竹木集成材承受荷载仅分别下降11%,18%,而无预应力FRP增强竹木集成材则急剧下降46.80%。According tobending experiments of wood-bamboo structuralglulam reinforced by prestressed FRP, the influence of prestressed FRP on bending strength, elastic modulus and the neutral axis was studied. The experimental results are as follows： bending strength, elastic modulus and the shift of neutral axis of wood-bamboo structuralglulam reinforced by prestressed FRP with 30% of ultimate tensile strength（UTS） are most. In addition,they are respectively 73.05MPa, 7312.80MPa, 1.73mm compared with gulam with no prestressing. What＇ s more, after the first destruction, the load of wood-bamboo structuralglulam reinforced by prestressed FRP with 30% ,40% of UTS respectively declines 11%, 18% instead of 46.80% of glulam with no prestressing.

关 键 词：预应力 纤维增强复合材料 集成材 竹材 抗弯性能 

分 类 号：S781.21[农业科学—木材科学与技术]