论文部分内容阅读
提出能够鉴别损伤位置和截面损伤严重程度的钢框架非比例破坏监测方法。所提出的方法由两部分组成,一是损伤识别,二是损伤严重程度分析。损伤识别和严重程度分析均以结构动力性质的变化作为损伤的判据,以此来确定损伤位置和严重程度。所提方法中损伤判别的重要特点是能够在损伤严重程度分析之前,精确地区分不同的损伤区域。与整个结构尺寸相比,损伤区域相对较小,因此,确定损伤严重程度的计算量更小。检测方法的另一个特点是有些特征值或振型对噪声相对不敏感。采用所提检测方法对几个框架进行验证,结果表明,该方法能够成功地检测及量化截面的损伤。
A non-proportional damage monitoring method of steel frame that can identify the location of damage and the severity of cross-section damage is proposed. The proposed method consists of two parts, one is damage identification and the other is damage severity analysis. Damage identification and severity analysis are based on changes in the structural dynamics of the damage as a criterion to determine the location and severity of injury. An important feature of the proposed method for determining damage is the ability to accurately distinguish between different damaged areas before the severity of the damage is analyzed. The lesion area is relatively small compared to the size of the entire structure and therefore the computational effort to determine the severity of the lesion is smaller. Another characteristic of the detection method is that some eigenvalues or modes are relatively insensitive to noise. The proposed method was used to verify several frames. The results show that this method can successfully detect and quantify cross-section damage.