Numerical Studies on Combined VM Loading and Eccentricity Factor of Circular Footings on Sand

Abstract

For circular rigid footings with a rough base on sand, combined vertical -moment loading capacity was studied by three-dimensional numerical modelling. Mohr-Coulomb plasticity model with the associated flow-rule was used for the soil. After comparing the results of the swipe loading method, which can construct the interaction diagram with smaller number of analyses, and those of the probe loading method, which can simulate the load-paths in the conventional load tests, it was found that both loading methods give similar results. Conventional methods based on the effective width or area concept and the results by eccentricity factor (  ) were reviewed. The results by numerical modelling of this study were compared with those of previous studies. The combined loading capacity for vertical (V) -moment (M) loading was barely affected by the internal friction angle. It was found that the effective width concept expressed in the form of eccentricity factor can be applied to circular footings. The numerical results of this study were smaller than the previous experimental results and the differences between them increased with the eccentricity and moment load. Discussions are made on the reason of the disparities between the numerical and experimental results, and the areas for further researches are mentioned.요 지

Penetration Behavior of Jack-up Leg with Spudcan for Offshore Wind Turbine to Multi-layered Soils Using Centrifuge Tests

“…Therefore, it is also efficient to reduce its levelized cost of energy (LCOE). However, the behavior of this new jack-up substructure are not well analyzed, so it is necessary to analyze the installation behavior by taking the soil properties into account to ensure stable support depending on the soil conditions (Teh et al, 2008;Lee, 2009;Cassidy, 2012;Kim et al, 2014;Jin et al, 2015;Yoo et al, 2016;Yoo et al, 2017;Xie et al, 2017;Choi, 2020;Falcon et al, 2021a;Falcon et al, 2021b).…”