关键词: 相似材料, 试验研究, 模型试验, 动力模型试验, 动力相似, 混凝土高坝, 超声波检测

Abstract:

Based on the dynamic similarity criteria of dynamic model tests, a new type of dynamic test model materials of high concrete dams named DMM has been developed through a series of tests of proportion of mixture and mechanical properties as well as the ultrasonic detection. The fluvial sand being used as the coarse aggregate in the dynamic similarity material of concrete dams has been presented for first time. It has been found that by the way of regulating its mixture proportion the dynamic elastic modulus and density of the model material can be controlled and adjusted efficiently. So it’s significantly better than the quartz sand and so forth. The results of a large number of experiments show that DMM material has advantages of not only the high density, low dynamic elastic modulus, but also stable and apparent linear elastic stage involved in its stress-strain relation, with a stable and significant linear elasticity, conforming to the basic requirements of dynamic model test of high concrete dam and similarity criteria. It is green and non-toxic, cheap and its making is shorter. It’s expected to be a excellent dynamic similarity material.

Key words: similarity material, experimental research, model experiment, dynamic model experiment, dynamic similar, high concrete dam, ultrasonic detection similar, high concrete dam, ultrasonic detection