BFRP筋轴心受压力学性能试验研究  

Experimental Study on Axial Compression Mechanical Performance of Basalt Fiber Reinforced Polymer Bar

作　　者：郑宏宇[1] 范博文 许迪鑫 江怀雁[3] 袁世杰 ZHENG Hong-yu;FAN Bo-wen;XU Di-xin;JIANG Huai-yan;YUAN Shi-jie(Key Laboratory of Disaster Prevention and Stnictural Safety of Ministry of Education,School of Civil Engineering and Architecture,Guangxi University,Nanning 530004,Guangxi,China;China Construction Fifth Engineering Bureau Co.,Ltd.,Changsha 410004,Hunan,China;School of Civil Engineering,Guangxi Polytechnic of Construction,Nanning 530007,Guangxi,China;Hualan Design&Consulting Group,Nanning 530029,Guangxi,China)

机构地区：[1]广西大学土木建筑工程学院工程防灾与结构安全教育部重点实验室,广西南宁530004 [2]中国建筑第五工程局有限公司,湖南长沙410004 [3]广西建设职业技术学院土木工程学院,广西南宁530007 [4]华蓝设计(集团)有限公司,广西南宁530029

出　　处：《合成纤维》2022年第1期46-52,共7页Synthetic Fiber in China

基　　金：国家自然科学基金项目(51968004);2020年度广西高校中青年教师科研基础能力提升项目(2020KY35020)。

摘　　要：为详细考察玄武岩纤维增强复合筋(BFRP)的轴心受压力学性能,设计制作了36个受压试件,测试BFRP筋的受压破坏模式、抗压强度、压缩弹性模量、压缩变形率,研究直径、长细比、破坏模式对BFRP筋受压力学性能的影响。试验结果表明,BFRP筋的受压破坏模式分为剪切、胀裂、失稳三种,以剪切破坏为主;受压应力—应变关系为线弹性,离散性大于受拉;抗压强度约为抗拉强度的1/3;压缩弹性模量与拉伸弹性模量之比为50.5%~101.1%,且比值随筋材直径的增大而增大;极限压应变达0.0060以上,是普通混凝土极限压应变的2~3倍;长细比和名义直径对BFRP筋各项受压力学指标有一定影响规律,但破坏模式无明显规律。In order to investigate the axial compression mechanical performance of basalt fiber reinforced polymer(BFRP)bar,36 compression test specimens were designed and made to observe the compression failure modes and test compression elastic modulus,compressive deformation rate,and the influences of diameter,slenderness ratio and failure modes on the compression mechanical performance of them were studied.The test results indicate that the compression failure modes of BFRP bars include shear,transverse burst and buckling,and shear is the main failure mode;compressive stress-strain relationship is linear elasticity,the data discrete degree is greater than that of tension;compressive strength is about 1/3 of tensile strength;the ratio of compressive elastic modulus to tensile elastic modulus is 50.5%~101.1%,and increases with the increasing of the BFRP bar diameter;ultimate compression strain is more than 0.0060,(2~3)times of ultimate compression strain of ordinary concrete;slenderness ratio and nominal diameter have certain influence on the compression mechanical indexes of BFRP bar,while failure modes have no obvious regularity on the indexes.

关 键 词：BFRP筋 受压 强度 弹性模量 变形率 长细比 

分 类 号：TU375[建筑科学—结构工程]