嵌入式CFRP筋加固圆木柱轴心抗压性能试验  

Experiment on Axial Compression Properties of Circular Timber Columns Strengthened with Near-surface Mounted CFRP Rods

作　　者：淳庆[1] 张洋[2] 潘建伍[3] 

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,江苏南京210096 [2]东南大学土木工程学院,江苏南京210096 [3]南京航空航天大学土木工程系,江苏南京210016

出　　处：《建筑科学与工程学报》2013年第3期20-24,共5页Journal of Architecture and Civil Engineering

基　　金：国家自然科学基金重点项目(51138002);国家自然科学基金项目(51008059);浙江省文物局文物保护科技项目(2012);中央高校基本科研业务费专项资金项目(2013)

摘　　要：为研究不同规格的嵌入式碳纤维增强复合材料（CFRP）筋加固圆木柱的破坏形态、轴心抗压承载力、荷载一应变关系，共进行了12根试件的抗压性能试验，包括4根未加固柱、4根内嵌函6mmCFRP筋材的加固柱、4根内嵌垂8mm CFRP筋材的加固柱，其中松木和杉木各占一半。基于试验数据回归，提出了嵌入式CFRP筋加固圆木柱轴心抗压承载力的计算公式。试验结果表明：采用嵌入式CFRP筋加固后，圆木柱的轴心抗压承载力有不同程度的提高，提高幅度为6．2％～26．9％（松木）和26．4oA～47．1％（杉木）；其峰值压应变也有较小幅度的提高，荷载一纵向压应变曲线基本上呈直线，后期的塑性变形较小。Abstract： In order to study the failure modes and axial compressive bearing capacity and load- strain curves of circular timber columns strengthened with near-surface mounted carbon fiber reinforced polymer （CFRP） rods, the axial compression property tests on twelve specimens were carried out, including four unstrengthened specimens and four specimens strengthened with ~6 mm CFRP rods and four specimens strengthened with ~~8 mm CFRP rods. The deal specimens and fir specimens had half each. Based on the experiment data, the calculation formulas of axial compressive bearing capacity of eircular timber columns strengthened with near surface mounted CFRP rods were presented. The experiment results show that the axial compressive bearing capacity of the eirular timber columns strengthened with CFRP rods is improved, comparing with the specimens without being strengthened with CFRP rods. The axial compressive bearing capacity of deal specimen improves by 6.2%-26.9 %, and the axial compressive bearing capacity of fir specimen improves by 26. 4%-47. 1%. The peak compression strains of strengthened specimens improve a little. The load-longitudinal compression strain curves are commonly linear,and the plastic deformation in the later stage is small.

关 键 词：嵌入式碳纤维增强复合材料筋 圆木柱 轴心抗压承载力 荷载-压应变曲线 破坏形态 

分 类 号：TU366.2[建筑科学—结构工程]