Dynamic Earth Pressures on Deeply Embedded Large Cylindrical Structure under Random Waves and Mechanism Investigation on Structural Instability

TLDR: In this paper, the authors investigated the mechanism of instability and failure of a large cylindrical structure under random waves by analyzing the experimental data both in the time and frequency domains and surveying the real state of structural instability.

Abstract: In order to investigate the mechanism of instability and failure of the deeply embedded large cylindrical structure under random waves, wave flume experiments with different wave conditions were carried out and the corresponding dynamic earth pressures on the structure were measured. By analyzing the experimental data both in the time and frequency domains and surveying the real state of structural instability, the mechanism of instability and failure of this type of structure is explored and interpreted in the paper. The present study demonstrates that dynamic change of material properties of foundation soil under random waves needs to be paid much attention in the mechanism analysis. The development of soften of mechanical strengths and inreversible plastic deformations of soil, which are induced by structural vibrations, can force the structure inclined, and this might lead the structure gradually to overturn due to long and continuous actions of random waves.