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针对恶劣海洋环境作用下,结构的耐久性与环境作用的相关关系问题,通过对实验数据的分析,研究了干湿交替、冻融循环、腐蚀疲劳恶劣海洋环境作用的相关理论模型.研究结果表明:环境效应作用具有时间特性、作用的相继性和叠加性,各作用效应强度取决于作用前的结构状况,共同作用效应强度将放大作用效果,存在耦合关系,具有明显的相关关系;通过分析作用效应及相关试验结果,给出了基于斜平面的相关关系的理论模型、曲面及边界方程,明确了腐蚀疲劳破坏域的概念,且破坏域由外部曲面包围.
In the light of the relationship between the durability of the structure and the environmental effect caused by the harsh marine environment, the theoretical model of the interaction between the wetting and drying, the freeze-thaw cycle and the corrosive fatigue of the marine environment was studied by analyzing the experimental data.The results show that : The environmental effect has the time characteristics, the sequential effects and the additive effects. The intensity of each effect depends on the structural condition before the action, and the intensity of the joint effect will amplify the effect and there exists the coupling relationship with obvious correlation. By analyzing the effect Effect and related test results, the theoretical model, surface and boundary equation based on the inclined plane are given, the concept of corrosion fatigue damage area is clarified, and the damage area is surrounded by the external surface.