MODELING OF MODELS ON FAILURE MODES OF CAISSON - RUBBLE MOUND STRUCTURE IN 1G FIELD TESTS

Abstract

 In performance design, it is important to evaluate the failure of a structure quantitatively in order to properly evaluate the required performance of the target structure. One of the methods to evaluate the failure quantitatively is the model test. In this study, the modeling of models focusing on the failure mode is investigated by using a model experiment with a scale ratio of 1/25, which is relatively common in wave-making channel experiments, referring to the large-scale experiment by Kikuchi et al (2011). In addition, the failure mechanism of the caisson - rubble structure is discussed by changing the mound shape. The coefficient of friction due to the sliding of the caisson was investigated, and the difference was found between the large scale experiment and the model experiment. Next, the behavior of the caisson and rubble mound under eccentric loading was investigated, and it was confirmed that the behavior of the caisson and the load-displacement relationship tended to be roughly consistent. The results of the PIV analysis showed that the deformation of the mound was also qualitatively similar. Finally, in the experiment with different mound shapes, the area of deformation in the mound changed with the continuation of loading, and the failure modes were different.