简支T梁损伤识别方法的研究

通过ANSYS建立混凝土简支T梁有限元模型,分析模型在不同损伤工况条件下,以柔度曲率差和动态响应二阶导数差这两种方法,对结构的损伤识别的效果;柔度曲率差在识别损伤的具体位置时精确性更高,但对未损伤位置的影响程度敏感性不大;动态响应二阶导数差对损伤程度灵敏度很高,但对具体位置的识别效果不是很好,因此将两种方法结合起来使用,可以更好地检测识别结构的损伤情况。

Research on Damage Detection Method for Simple T Beam

Concrete simple T beam finite element model through ANSYS is constructed to analyze the effect of the model on damaged structure identification in different damaged conditions and with the two methods such as flexibility curvature difference and dynamic response second order derivative difference.Flexibility curvature difference has higher accuracy on identifying real location of the damage but has little influence degree sensitivity to undamaged location.Dynamic response second order derivarive difference has much higher sensitivity to damaged degree but has low identification effect on real damaged lacation,thus,the combination of the two methods can better detect the damaged condition of the structure.