A PRIMARY DIGITAL DAM SIMULATION SYSTEM FOR AN ARCH DAM

摘要

Dam safety monitoring is one of the most indispensable tasks 'in dam construction and management which can provide plenty of raw monitoring data. Much actual performance information of dams, such as temperature, deformation, stress/strain and opening of cracks and joints, can be obtained by monitoring data. It is believed that the comprehensive state-of-art finite element analyses can also simulate the actual performance of dams if the input information is precise enough. Such Finite Element Model can be called "Digital Dam Simulation System (DOS System)". In this paper, based on abundance monitor data of an Arch Dam, a pilot primary model of DDS System is presented. Based on the monitoring data of the three plumb lines at the dam body, a simplified inverse analysis for the mechanical parameters of dam and foundation is performed. The precision and validation of FE model is verified. Then, a three-year simulation analysis of deformation process of the Arch Dam under the actual loads of gravity, hydrostatic pressure and temperature is conducted. The simulation deformation of the dam accord with the monitoring data approximately. Especially, the area of high stresses and the direction of maximal principal stresses on the downstream surface are almost identical with that of existing concrete cracks. The advancement of this study demonstrates that DDS systems can be developed for concrete dams with integrated monitoring systems in the future.