中文摘要：

应用Ansys建立空间刚架结构无损伤和有损伤的有限元模型。选取曲率模态作为损伤标示量应用于结构损伤识别。对空间三维曲率模态进行比较分析，结果表明，一阶曲率模态能够很好的对单一或多个损伤位置进行识别，且轴向曲率模态比横向曲率模态更适用于损伤识别。一阶曲率模态也可以对损伤程度进行初步判断，为探索通过曲率模态识别空间钢结构损伤提供一种可行的方法。

英文摘要：

A space frame structure of no damage and injury finite element models were established with Ansys, and analyze 3D curvature mode of the space rigid frame. Curvature mode as the labeled amount was selected and applied to structural damage, curvature mode of space frame was calculated. The results showed that the first-order curvature mode not only identify against single or multiple damage location, but also determine the initial degree of injury, and the axial curvature modal is better than the horizontal curvature mode for damage identification. A feasible method was provided by identifing the space frame structural damage of the curvature mode.