【摘要】 提出了无需量测外荷载的新的结构损伤识别方法,将经验模态分解应用于结构损伤识别,通过求振动响应信号固有模态函数的振动传递率,构建结构损伤识别参数;通过对预置不同开胶损伤程度的玻璃幕墙试件进行动态测试,得到不同损伤程度下玻璃幕墙的固有模态函数振动传递率,并根据振动传递率的差别来识别和评估玻璃幕墙开胶损伤程度。研究结果表明:与传统方法相比,该方法无需量测外荷载也能精确识别结构损伤,通过损伤参数值也能判断损伤大小。更多还原

【Abstract】 A novel structural damage identification method without excitation measurement was proposed.Empirical mode decomposition(EMD) was applied to structural damage identification.Through seeking the vibration transmissibility of vibration response signal intrinsic mode function(IMF),a set of structural damage identification parameters were constructed.Through the dynamic testing on different pre-damage degrees of glass curtain walls,the intrinsic mode function vibration transmissibilities under different damage degrees were got in terms of the differences of vibration transmissibility to identify and assess the damage degrees of glass curtain walls.Study results show that compared with traditional methods,this method can accurately identify the structural damage without excitation measurement.The severity of damage can be assessed through the damage parameter values.更多还原