期刊
ENGINEERING STRUCTURES
卷 179, 期 -, 页码 460-475出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2018.10.082
关键词
Random; Spatial variation; Heterogeneity; Frequency; Dam class; System identification
Determining vibration characteristics constitutes the first step in calibrating the finite element model in an old arch dam analysis. These characteristics provide the required information for a proper dynamic analysis of the coupled fluid-structure system used for risk assessment purposes. This paper investigates the detailed vibration characteristics of arch dams with heterogeneous material by applying random field theory. A group of six double-curvature arch dams are studied herein. The spatial material distribution using different correlation lengths is compared, and the response dispersion is quantified. An experimental meta-model design is developed for a specific class of dams, with an approximate analytical solution being derived. Ultimately, an iterative, random field-based system identification technique is proposed for old arch dams.
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