期刊名称：IOP Conference Series: Earth and Environmental Science
印刷版ISSN：1755-1307
电子版ISSN：1755-1315
出版年度：2019
卷号：304
期号：2
页码：1-12
DOI：10.1088/1755-1315/304/2/022005
出版社：IOP Publishing
摘要：Deformation is the most intuitive reflection of comprehensive behavior of concrete dams, and it is of great significance to determine the deformation monitoring indexes for dam abnormality identifying. In this paper, deformation monitoring indexes of arch dam were determined in the form of causal components, and the time-varying effect caused by the degradation of dam material properties was considered. The hydraulic component in monitoring index was determined into three grades by water density overloading method, and the appearances of dam heel yield depth coming up to the curtain axis, the catastrophes of dam body yield volume ratio and dam radial displacement, were respectively taken as the abnormal symbols. The temperature component was determined for two operation conditions, with respect to the measured high and low temperature periods. As for the time effect component, it was initially calculated by FEM with the environmental damage-considered rheological constitutive models, and fitted by the combination of exponential function and periodic function. A case study was performed to give more detailed introductions for determining the proposed deformation monitoring indexes. Research results show that the components of temperature and time-effect occupy a large proportion in monitoring index of arch dams.
