嵌入式CFRP筋加固圆木柱轴心抗压性能试验-《建筑科学与工程学报》

文章信息/Info

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

Author(s):: CHUN Qing, ZHANG Yang, PAN Jian-wu; Key Laboratory of Urban and Architectural Heritage Conservation of Ministry of Education, Southeast University

Keywords:: near-surface mounted CFRP rod; circular timber column; axial compressive bearing capacity; loadcompression strain curve; failure mode

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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Φ6 mm CFRP筋材的加固柱、4根内嵌Φ8 mm 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26.4％～47.1％（杉木）；其峰值压应变也有较小幅度的提高，荷载纵向压应变曲线基本上呈直线，后期的塑性变形较小。

Abstract:: n 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 Φ6 mm CFRP rods and four specimens strengthened with Φ8 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 circular timber columns strengthened with nearsurface mounted CFRP rods were presented. The experiment results show that the axial compressive bearing capacity of the cirular 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. [HJ]The loadlongitudinal compression strain curves are commonly linear, and the plastic deformation in the later stage is small.