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为了分析木梁加固后的力学性能,对碳纤维布加固木梁抗剪性能进行了试验研究,得到了木梁剪切破坏的破坏形态、荷载-挠度曲线及荷载-应变关系等性能。试验结果表明:木梁剪切破坏通常为顺纹错动剪切破坏;顺纹错动剪切破坏具有很好的延性,而弯曲破坏是典型的脆性破坏;支座及加载点附近的碳纤维布直至破坏时也没有出现拉应变,梁端木材承受横向拉力。
In order to analyze the mechanical properties of wood beam after reinforcement, the shearing performance of wood beam reinforced with CFRP sheets was studied. The failure mode, load-deflection curve and load-strain relationship of the shear failure of the wood beam were obtained. The experimental results show that the shear failure of the wooden beam is usually the shear failure of the parallel grain along the grain boundary, the ductile shear failure along the grain boundary has good ductility and the bending failure is a typical brittle failure. The carbon fiber cloth near the support and the loading point Until the destruction did not appear when the tensile strain, beam end timber to withstand lateral pull.