Abstract: There are many non-destructive methods for deterioration detection and health evaluation of old hydraulic structures. However, how to quantitatively determine the influence of frost damage on concrete properties, aging and state of old structures is a problem. In this paper, the deterioration rules of mechanical properties of concrete in freeze-thaw process are studied, and the relationship between damage amount and concrete properties is established, aiming to provide a theoretical basis for diagnoses and identification of concrete aging state of hydraulic structure.

Key words: concrete, freeze-thaw, strength, attenuation model

摘要： 在检测和评价发生劣化的混凝土结构时，常采用无损检测方法，但无法根据检测结果预测今后混凝土的老化进程和使用寿命等。笔者研究了冻融作用下混凝土力学性能的衰减规律，并采用损伤力学方法建立动弹性模量表征的损伤量与混凝土力学性能相对值之间的关系，以便为水工建筑物混凝土的检测和评估提供依据和参考。

关键词: 混凝土, 冻融, 强度, 衰减模型