Journal
OCEAN ENGINEERING
Volume 264, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.oceaneng.2022.112592
Keywords
Lateral spreading; Soil -pile -quay wall; Shake -table test; Two-dimensional (2D) FE model; Parametric analysis; Offshore
Funding
- National Natural Science of China
- Shandong Provincial Natural Sci- ence Foundation
- [51908484]
- [51808478]
- [ZR2019BEE039]
- [ZR2019QEE033]
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This study analyzed the soil-pile-quay wall interaction in liquefaction-induced lateral spreading ground through experimental investigation, numerical simulation, and parametric analysis. A large-scale shake-table test was conducted to observe phenomena such as quay wall overturning and ground settlement. A validated finite element model was used to conduct a parametric study on the effects of various parameters on the interaction. The results showed that these parameters had a significant influence on the soil-pile-quay wall interaction.
Earthquake-induced soil liquefaction and lateral spreading often causes damage to pile foundations of quays and offshore structures. In this study, the soil-pile-quay wall interaction in liquefaction-induced lateral spreading ground was analyzed from three perspectives-experimental investigation, numerical simulation, and parametric analysis. A large-scale (1 g acceleration) shake-table test was conducted on a 2 x 2 pile group behind a quay wall, and described in terms of sensor arrangement, model configuration, and test results. The test resulted in phe-nomena such as the quay wall overturning to the water side, and ground settlement. A 2D (two-dimensional) nonlinear FE (finite element) model of a coupled dynamic soil-water system, which considered soil-pile-quay wall interactions, was validated using the experimental data. Based on the validated model, a parametric study was conducted to illuminate the effects of the pile head fixing conditions, pile stiffness, superstructure mass, permeability coefficient, and acceleration. The results indicated that these parameters had a significant influence on the soil-pile-quay wall interaction in the liquefaction-induced lateral spreading ground. Investi-gating the effects of each of the five parameters on the dynamic performance of pile foundations in this study has guiding implications for tests and numerical simulations.
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