Work

Thermal-mechanical sequence coupling analysis on the ultimate bearing capacity of embedded foundations in polar marine permafrost

Year: 2024

Type: article

Abstract: This study presents the results of the numerical simulation analysis, aiming to investigate the temperature effects on the vertical ultimate bearing capacity of the three types of foundations, namely generic spudcan (SGEN), skirted and pile foundations, at different embedded depth ratios H / D ( H / D = 1/3, 2/3, and 1 or H / D = 10/3, 5, and 20/3) and strength reduction coefficients s u, T / s u0 ( s u, T / s u0 = 0.1, 0.5). The latent heat effects on foundation bearing capacities are studied by small strain finite element analysis (FEA). The findings from this investigation and previous research indicate that the foundations' vertical ultimate bearing capacity decreases with time, while it increases with increasing the foundation's embedment ratio. For the foundations, the strength reduction coefficient plays an important role in the vertical ultimate bearing capacity. Notably, as the strength reduction coefficient decreases from 0.5 to 0.1, the reduction rate of the vertical ultimate bearing capacity increases by ∼ 3 to 6 times accordingly. Consequently, a normalized bearing capacity coefficient model has been proposed to provide an optimization tool for engineering design in permafrost regions.

Source: Applied Ocean Research

DOI: 10.1016/j.apor.2024.104256

Authors: Xiaofei Hu, Long Yu, Qing Yang, Xiao Han

Institutions: Dalian University of Technology, State Key Laboratory of Coastal and Offshore Engineering

Language: English

Topic: Geotechnical Engineering and Soil Mechanics

Subfield: Civil and Structural Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Climate action

Open Access status: hybrid

Estimated APC paid: $4,080