一种结构损伤指数的研究

RESEARCH ON A STRUCTURE DAMAGE INDICATOR

阐述了一种新型结构损伤指数,该指数通过计算白噪声激励下结构响应的相关函数得到。在本文中,采用钢框架模型,通过计算其位移响应的相关函数来计算损伤指数。在底层柱设置损伤,考虑四种损伤情况,计算并绘制损伤指数变化率与损伤程度的关系曲线。数值模拟结果显示,该指数变化率随损伤程度单调变化,对小损伤敏感,具有一定的损伤判定与标定潜力。

A new structure damage indicator was expatiated which was obtained through calculating the correlation function of structure response under white noise. In this article, it was obtained through calculating the correlation function of steel frame structure displacement response. Damages were made at the top of one first floor column and four damage conditions were considered. The indicator change percentage curves with the damage degree were plotted. The results of numerical simulation show that the indicator change percentage changes monotonously with damage degree. It is sensitive to minor damage and it has some potential to judge and evaluate the structure damage.