Dynamic centrifuge model test on concrete-faced rockfill dam
The study on dynamic responses of CFRD due to earthquake is presented using 50g-t centrifuge shaking table in Tsinghua university subjected to Parkfield ground motion.Acceleration time histories are recorded by acceleration transducers at different locations on the model and the deformations of the face-slab are also measured.The results show that the maximum response occurred at the dam crest where the acceleration factor is near 2.The CFRD response is amplified as the seismic wave propagating upwards through the dam.The responses of the zone adjacent to the upper and lower dam are greater than that of the internal dam.Significant stress and strain occur during the earthquake: compressive stress occurs in the upper part of the face slab while tensile stress occurs in its lower part.The flexural torque occurs in the middle part of the face slab.
This paper discussed the time field information fusion technique based on the Dampster Shafter method. A new wear mode recognition method of marine diesel engine is put forward. This new method can decrease the uncertainty on the recognition. A wear mode recognition expert system is built and the reliability of recognition results is testified on the practice.