The present work aims to formulate a numerical procedure for modelling fatigue damage accumulation in critical components of reinforced-concrete industrial buildings. Preliminary hierarchical structural-level finite element analysis is performed to locate the critical components. Regularly identified are the RC beams subjected to moving crane loads. Based on an extended damage model for high-cycle fatigue problems, investigated are the RC beams subjected to moving crane loads with constant and variable amplitude. In order to accommodate the practical scenarios, a case of accidental loading is further studied. The simulated process of fatigue damage accumulation is designated up to 70 years of operation. The results show, compared to the case of constant amplitude, the fatigue damage evolution in RC beam increases appreciably when subjected to variable amplitude. The phenomenon of structural deterioration is particularly highlighted in the case of variable amplitude after long-term operation. Furthermore, accidental overloading has appreciable impact on the fatigue damage accumulation of RC beams, which aggravates the structural deterioration. The work provides a numerical framework for damage prognosis and safety assessment on the RC buildings that have been in service for decades under a variety of loading scenarios.

本工作旨在制定一种数值程序，用于对钢筋混凝土工业建筑物关键构件中的疲劳损伤累积进行建模。进行了初步的层次结构级有限元分析，以找到关键组件。经常确定承受移动起重机负载的RC梁。基于针对高周疲劳问题的扩展损伤模型，研究了在不断变化的起重机载荷下承受移动起重机载荷的RC梁。为了适应实际情况，进一步研究了意外加载的情况。疲劳损伤累积的模拟过程指定运行长达70年。结果表明，与恒定振幅的情况相比，当振幅变化时，RC梁的疲劳损伤发展明显增加。在长期运行后振幅可变的情况下，结构恶化的现象尤为突出。此外，意外的过载对RC梁的疲劳损伤累积有明显的影响，从而加剧了结构劣化。这项工作为在各种载荷情况下已经使用了数十年的RC建筑物提供了损伤预测和安全评估的数值框架。加剧了结构的恶化。这项工作为在各种载荷情况下已经使用了数十年的RC建筑物提供了损伤预测和安全评估的数值框架。加剧了结构的恶化。这项工作为在各种载荷情况下已经使用了数十年的RC建筑物提供了损伤预测和安全评估的数值框架。