碳-芳混杂纤维布加固木梁抗弯性能试验研究  

Experimental study on bending behavior of timber beams strengthened with CFRP/AFRP hybrid FRP sheet

作　　者：淳庆[1] 潘建伍[2] 包兆鼎 

机构地区：[1]东南大学城市与建筑遗产保护教育部重点实验室,南京210096 [2]南京航空航天大学土木系,南京210016 [3]南京海拓复合材料有限责任公司,南京211212

出　　处：《东南大学学报（自然科学版）》2011年第1期168-173,共6页Journal of Southeast University：Natural Science Edition

基　　金：国家自然科学基金资助项目(51008059);中国博士后科学基金资助项目(20090450072);江苏省博士后科学基金资助项目(0901003c);东南大学博士后重点科研资助项目

摘　　要：通过碳-芳混杂纤维布加固矩形木梁(杉木和松木)的抗弯性能试验,研究了不同层数的碳-芳混杂纤维布加固矩形木梁的破坏形式、抗弯承载力、荷载挠度曲线和截面应变分布.试验结果表明:与未加固试件相比,木梁经碳-芳混杂纤维布加固后,其抗弯承载力和刚度有了一定程度的提高,抗弯承载力提高幅度在18.1%～62.0%(松木)和7.7%～29.7%(杉木);刚度提高幅度在13%～21%(松木)和6%～10%(杉木).木梁截面应变沿高度方向的分布基本符合平截面假定.最后,基于试验数据拟合,提出了碳-芳混杂纤维加固木梁抗弯承载力的计算公式.Based on the experiment of timber rectangle beams（made of deal and fir） strengthened with CFRP（carbon fiber reinforced polymer）/AFRP（aramid FRP） hybrid FRP（HFRP） sheet,the failure mode,bending bearing capacity,loading-deflection curve and strain distribution at mid-span section of timber beam with different number of reinforced sheet layer are analyzed.The results show that comparing with the specimens without being strengthened by HFRP,there is certain improvement in bending bearing capacity and stiffness of the specimens strengthened with HFRP.Bending bearing capacity of the deal specimens and fir specimens can get an improvement of 18.1% to 62.0% and 7.7% to 29.7% respectively.The improvement of stiffness of the deal specimens and fir specimens are 13% to 21% and 6% to 10% respectively.Based on the experimental data,the computing formulas of bending bearing capacity of timber rectangle beams strengthened with HFRP are presented.

关 键 词：混杂纤维 木梁 抗弯承载力 刚度 

分 类 号：TU366.2[建筑科学—结构工程]