Q225钢材损伤变量研究

Research on Damage Index of Steel Q225

摘要: 损伤变量是描述材料、构件或结构劣化程度的变量。首先对不同的损伤变量模型进行了评述，并选择适用于Q225钢材的损伤变量模型，基于Q225钢材单调拉伸和低周疲劳反复加载试验的结果，对所选择的损伤变量模型进行了修正，提出了合理的权重系数b，为Q225钢材在低周反复加载下力学性能的后续研究提供了基础。

Abstract: Damage index describes the damage situation of materials, members and structures. Various damage index models were reviewed and the model suitable for Q225 steel materials was selected. Based on the result of monotonic loading tests and low-cycle cyclic loading tests on steel Q225, the selected damage index model was modified with the suggested weighting coefficient β. This provides the basis for further research on steel Q225.