基于非接触测量技术的进水塔动力模型破坏试验研究

高耸进水塔的抗震安全一直是水利水电工程建设中倍受关注的关键技术问题。本文通过破坏性动力模型试验基于非接触测量技术对地震作用下进水塔主-附结构体系的抗震性能和震损模式进行研究,将3D-DIC与OC非接触测量技术相结合并引入水工进水塔的破坏性动力模型试验中,全程测量进水塔模型从弹性阶段到破坏性阶段的动应变场,实时测量模型关键部位动位移。计算结果表明,基于3D-DIC测量技术的应变场分析可以较好识别结构损伤发生和发展,确定结构的抗震薄弱部位;综合OC技术采集的动位移结果,可有效评价结构的抗震性能和极限承载能力。研究表明,3D-DIC与OC测量技术相结合适用于水工动力模型试验研究,且测量结果精确可信。本文研究成果可供高耸进水塔抗震设计和研究工作提供参考。

Non-contact measurement technique-based experimental study on dynamic failure model for intake tower

The seismic safety of high-rise water intake tower has always been a key technical problem in the construction of water conservancy and hydropower projects． In this paper，through destructive dynamic model test，based on non-contact measurement technology，the seismic performance and earthquake damage mode of main-attached structure system of intake tower under earthquake are studied． 3D-DIC and OC non-contact measurement technology are combined and introduced into destructive dynamic model test of hydraulic intake tower． The dynamic strain field of intake tower model from elastic stage to destructive stage is measured in the whole process，and the dynamic displacement of key parts of the model is measured in real time． The calculation results show that the strain field analysis based on 3D-DIC measurement technology can better identify the occurrence and development of structural damage and determine the seismic weak parts of the structure; The seismic performance and ultimate bearing capacity of structures can be effectively evaluated by integrating the dynamic displacement results collected by OC technology． The research shows that the combination of 3D-DIC and OC measurement technology is suitable for hydraulic dynamic model test，and the measurement results are accurate and reliable． The research results of this paper can provide reference for seismic design and research of high-rise intake tower．