Coordination Funds

钢筋混凝土（RC）结构是我们生活中不可或缺的一部分，因为我们的机动性、工业性能和现代社会的功能通常直接取决于这些结构的可靠性和可用性。因此，考虑到现代钢筋混凝土结构必须满足日益增长的性能要求，在整个使用寿命内以经济高效的方式保持钢筋混凝土基础设施的完整性是至关重要的。更高的（流量）负载、更长的使用寿命和新材料的使用，需要在复杂的管理工具框架中嵌入可靠的使用寿命预测方法。本项目的目的是开发一种新的方法来评估RC结构的安全性和耐久性。该方法是基于超声尾波干涉法（CWI）在钢筋混凝土结构中的应用。在样品尺度（nm - cm范围）和结构尺度（cm - m）上的实验室实验提供了特定类型的负载（即机械或热）及其对材料的影响以及尾轴特征之间的相关性。数值模拟使用平移，升级和本地化方法将应用于区分不同类型的负载。最后，将开发使用尾数据信息的方法，以实现RC结构使用寿命预测的结构模型的快速更新。

Reinforced concrete (RC) structures are an indispensable part of our lives, as our mobility, the industrial performance and the functionality of modern society in general directly depend on the reliability and availability of these structures. Hence, cost-efficient preservation of the integrity of the RC infrastructure over the complete service life is of utmost importance, considering in particular, that modern RC structures have to meet increasing demands with regard to performance. Higher (traffic) loads, longer service life and the use of new materials necessitate a reliable service life prediction method embedded in the framework of a sophisticated management tool. The aim of this project is to develop a novel method for the assessment of the safety and durability of RC structures. The method is based on the application of ultrasonic coda wave interferometry (CWI) to RC structures. Laboratory experiments at the specimen scale (nm - cm range) and structure scale (cm - m) provide correlations between specific types of load (i.e. mechanical or thermal) and their effect on the material as well as features of the coda. Numerical modelling using translation, upscaling and localization methods will be applied to distinguish between different types of load. Finally, methods for using the information from the coda will be developed to enable rapid updates of structural models for service life prediction of RC structures.