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EXPERIMENTAL STUDY ON MECHANICAL PROPERTIES OF CIRCULAR TIMBER COLUMNS STRENGTHENED WITH NEAR-SURFACE MOUNTED CFRP SHEETS UNDER AXIAL COMPRESSION
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摘要: 通过轴心抗压性能试验，研究不同尺寸的内嵌碳纤维板加固圆木柱(松木或杉木)的破坏形式、轴心抗压强度、荷载-应变曲线。结果表明：用内嵌碳纤维板加固后，圆木柱的轴心抗压强度有了不同程度的提高，提高幅度为6.9%～24.1%(松木)和24.1%～63.2%(杉木)。基于试验数据回归，提出内嵌碳纤维板加固圆木柱轴心抗压承载力的计算公式。Abstract: Based on the experiment of circular timber columns made of deal and fir strengthened by near-surface mounted CFRP sheets under axial compression, the failure modes, axial bearing capacity, and loading-strain curves were analyzed.The results showed that comparing with the specimens without being strengthened by CFRP sheets, the axial bearing capacity of the specimens strengthened by CFRP sheets was improved.The axial bearing capacity of deal specimens was improved by 6.9%~24.1%, and the axial bearing capacity of fir specimens was improved by 24.1%~63.2%.Based on experimental data, the computing formulas of axial bearing capacity of circular timber columns made of deal and fir strengthened by near-surface mounted CFRP sheets were presented respectively.
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