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采用静力加载试验方法,研究了CFRP布墩接加固底部糟朽柱根的轴压承载性能。以故宫某古建檐柱为例,制作了6根1∶2试验模型,含1根完好试件,5根CFRP布墩接加固木柱柱根试件,进行了竖向轴压静力加载试验。基于试验结果,获得了木柱墩接加固前后的荷载-变形曲线、延性系数、极限承载力、荷载-应变曲线、轴压刚度等,讨论了CFRP布墩接加固木柱柱根的轴压受力机理,评价了CFRP布加固效果。结果表明:CFRP布墩接加固糟朽木柱柱根后,木柱轴压承载力提高幅度约为0.2%~8.3%,环向极限压应变可恢复到完好木柱的109.6%~126.5%,纵向极限应变可恢复到完好木柱的108.6%~160.7%,木柱变形能力得到提高,且木柱进入破坏阶段的轴压刚度提高,刚度退化不明显。因此,CFRP布墩接加固底部糟朽木柱柱根具有较好的效果。
The static loading test method was used to study the axial compressive loading behavior of CFRP piers abutting the bottom of the reinforced concrete column. Take an ancient eave column in the Forbidden City as an example, six 1: 2 test models were made, including 1 intact specimen and 5 CFRP cloth piers. test. Based on the test results, the load-deformation curve, ductility coefficient, ultimate bearing capacity, load-strain curve and axial compression stiffness before and after reinforcement of wooden pier were obtained. The axial compression of CFRP pier Force mechanism, evaluated CFRP cloth reinforcement effect. The results show that the axial compressive bearing capacity of wood column increases by about 0.2% ~ 8.3% after CFRP pier reinforce the rotten wood column root, and the ultimate compressive strain of the wood column can return to 109.6% ~ 126.5% of the intact wood column. The ultimate strain can be restored to 108.6% ~ 160.7% of the intact wooden columns, the deformation ability of the wooden columns is improved, and the axial compressive rigidity of the wooden columns entering the damaged phase is increased, and the stiffness degeneration is not obvious. Therefore, CFRP cloth piers reinforce the bottom of the bad wood column column root column has a good effect.