Compressive properties of glue-laminated timber circular post modified by basalt fiber reinforced polymer  

玄武岩纤维包裹胶合木圆柱的轴压性能

作　　者：WEI Peixing GUO Wenzhen ZHAO Mingjing GUO Zhensheng WANG Jianhe 卫佩行;郭雯祯;赵明静;郭振胜;王建和(江苏农林职业技术学院风景园林学院,镇江212400;河南师范大学物理学院,新乡453000;河南师范大学环境学院,新乡453000;西南林业大学材料与化学工程学院,昆明650224;宁波中加低碳新技术研究院有限公司,宁波315600)

机构地区：[1]School of Landscape Architecture,Jiangsu Vocational College of Agriculture and Forestry,Zhenjiang 212400,China [2]School of Physics,Henan Normal University,Xinxiang 453000,China [3]School of Environment,Henan Normal University,Xinxiang 453000,China [4]School of Materials and Chemical Engineering,Southwest Forestry University,Kunming 650224,China [5]Ningbo Sino-Canada Low-Carbon Technology Research Institute Co.Ltd.,Ningbo 315600,China

出　　处：《林业工程学报》2024年第5期67-74,共8页Journal of Forestry Engineering

基　　金：江苏农林职业技术学院“亚夫科技创新与服务”(2023kj11);江苏高校“青蓝工程”(2023);河南省高等学校重点科研项目(23B610009)。

摘　　要：Glued timber structure is one of the main forms of modern wood architecture,which has gradually developed towards mid-and high-rise buildings.Glue-laminated timber(GLT)is comprised of several laminates of parallel-to-grain dimension lumber that are bonded together with durable,moisture resistant structural adhesives.GLT can be used in horizontal applications as a beam and in vertical applications as a post.So,its compressive performance has a significant impact on structural safety.Fiber reinforced polymers(FRPs)were commonly used to improve the bearing capacity of GLT components,and the structural and process parameters largely determined the reinforcement effect.This study was aimed at investigating the influence of structural and process parameters on the axial compression performance of GLT components.Three wrapping methods(middle-part,end-part and full wrapping)and three lengths(0.6,0.8,and 1.0 m)of wood post specimens were designed in this work and the axial compression performance and ductility of GLT post specimens modified by basalt fiber reinforced polymer(BFRP)were studied.The results showed that the effect of different BFRP wrapping methods on the compressive strength and elastic modulus of laminated wood was not statistically significant(P>0.05).The compressive bearing capacity of unreinforced GLT posts decreased with the increase of aspect ratio.The GLT posts with middle-part and end-part wrapping still followed this pattern,while the compressive bearing capacity of GLT posts with full wrapping showed a pattern of first decreasing and then increasing.For GLT with low aspect ratios(4.0 or 5.3),there was no correlation between the wrapping method and the compressive bearing capacity,while the compressive bearing capacity of GLT with a high aspect ratio(6.7)for middle-part,end-part and full wrapping increased by 3.5%,7.5%and 9.7%,respectively.Compared to the unreinforced group,the ultimate axial compressive strength and modulus of elasticity(MOE)of the 6-E series specimens reinforced at both ends decre胶合木常用于木结构的梁柱构件,其抗压性能对结构安全有重要影响。纤维增强复合材料(FRP)用于提高胶合木构件承载力的实践中,构件结构参数和增强工艺参数决定了增强效果。为探究构件结构参数和增强工艺参数对胶合木构件轴压性能的改善效果,采用玄武岩纤维(BFRP)对相同直径、3种长度(0.6,0.8和1.0 m)的胶合木圆柱分别进行了3种不同包裹(柱中、柱端和全部)处理,并考察了包裹胶合木圆柱的轴心受压性能和延性性能。研究结果表明:不同BFRP包裹方式对胶合木抗压强度和弹性模量的影响在统计学意义上并不显著(P>0.05);未处理胶合木圆柱的抗压承载力随着长径比的增加而降低,BFRP柱中和柱端包裹处理的胶合木圆柱仍遵循此规律,而BFRP全部包裹的胶合木圆柱抗压承载力呈现出先降低后增加的规律;对于低长径比(4.0,5.3)的胶合木圆柱,包裹方式与胶合木圆柱的抗压承载力没有相关性,而高长径比(6.7)的胶合木圆柱在BFRP柱中、柱端和全部包裹方式下的抗压承载力分别提高了3.5%,7.5%和9.7%;不同长径比的胶合木圆柱在同样BFPR包裹下破坏模式一致,而同一长径比胶合木圆柱在不同BFRP包裹下破坏模式不同;不同长径比的胶合木圆柱延性性能在BFRP包裹下有不同程度的改善。

关 键 词：basalt fiber reinforced polymer(BFRP) GLT circular post bearing performance 

分 类 号：S781.2[农业科学—木材科学与技术]