a Department of Civil and Environmental Engineering, Imperial College London, UK
b Department of Civil Engineering and Industrial Design, University of Liverpool, Liverpool, UK
c Faculty of Civil Engineering, Ho Chi Minh City University of Technology (HUTECH), Ho Chi Minh City, Viet Nam
2022, 14(1): 180-196. doi:10.1016/j.jrmge.2021.11.005
Received: 2021-06-03 / Revised: 2021-09-19 / Accepted: 2021-11-21 / Available online: 2021-12-16
2022, 14(1): 180-196.
doi:10.1016/j.jrmge.2021.11.005
Received: 2021-06-03
Revised: 2021-09-19
Accepted: 2021-11-21
Available online: 2021-12-16
The node-based smoothed finite element method (NS-FEM) is shortly presented for calculations of the static and seismic bearing capacities of shallow strip footings. A series of computations has been performed to assess variations in seismic bearing capacity factors with both horizontal and vertical seismic accelerations. Numerical results obtained agree very well with those using the slip-line method, revealing that the magnitude of the seismic bearing capacity is highly dependent upon the combinations of various directions of both components of the seismic acceleration. An upward vertical seismic acceleration reduces the seismic bearing capacity compared to the downward vertical seismic acceleration in calculations. In addition, particular emphasis is placed on a separate estimation of the effects of soil and superstructure inertia on each seismic bearing capacity component. While the effect of inertia forces arising in the soil on the seismic bearing capacity is non-trivial, and the superstructure inertia is the major contributor to reductions in the seismic bearing capacity. Both tables and charts are given for practical application to the seismic design of the foundations.
Keywords: Limit analysis, Node-based smoothed finite element method (NS-FEM), Second-order cone programming (SOCP), Seismic bearing capacity, Strip footing
H.C. Nguyen
Dr. H.C. Nguyen obtained his PhD degree in Civil Engineering at Imperial College London, UK. During his PhD, Dr. Nguyen was awarded the Dean's Fund from Imperial College London (2017–2020). After his PhD studies, Dr. Nguyen worked as a postdoctoral research associate in Computational Geomechanics group at the University of Liverpool. He developed advanced numerical procedures using 3D SPFEM for large deformation analyses in geotechnical engineering.