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作为天然绿色材料胶合竹材在建筑和土木工程上的应用引起广泛关注,对外荷载作用下竹结构的状态进行监测具有重要应用价值。该文对一竹梁构件模型进行分级加载直至破坏,基于压电应力波传播与测量对其各受力状态下的状态进行监测。通过对比不同荷载等级时简谐激励信号下压电传感器的测量信号的幅值和扫频激励下小波包能量的差异,定义相应的损伤指标,实现了对竹梁构件在加载过程中损伤状态的有效监测。
As a natural green material glued bamboo in the construction and civil engineering applications have caused widespread concern, under the action of external load to monitor the status of bamboo structure has an important application value. In this paper, a model of bamboo beam components is graded and loaded until it is destroyed. Based on the piezoelectric stress wave propagation and measurement, the state of each component in its stress state is monitored. By comparing the amplitude of the measured signal of the piezoelectric transducer with the harmonic excitation signal and the difference of the energy of the wavelet packet under the excitation of the swept excitation under different load levels, the corresponding damage index is defined and the damage status of the bamboo beam component during loading Effective monitoring.