首页|Bearing Capacity Factor Characteristics of Footings on Double-layered Cohesive Soils

Bearing Capacity Factor Characteristics of Footings on Double-layered Cohesive Soils

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  • NETL
  • NSTL
  • Natl Taiwan Ocean Univ
In this study, the bearing capacity of a surface foundation resting on a double-layered cohesive soil profile wasinvestigated by applying a rotational mechanism and finite-difference numerical simulations. The bearing capacity factorbehaviors of a surface footing on double-layered cohesive soils can be classified and illustrated using a characteristicchart. Depending on the soil strata strength ratio and normalized layer thickness, the soil-foundation system can be in thesqueezing, factor-increasing, factor-decreasing, or constant factor zones. The results indicated that the trend of the curvesin the characteristic chart computed from the asymmetric failure mechanism was in accordance with that of the symmetricfailure mechanism of the numerical simulation. Based on the strength conditions of the upper and lower soil layers, thesoil plastic flow zone may enlarge, shrink, or even become constrained. For the analysis of the critical soil strength ratiothat causes punching shear failure, the results from the SNAME method were less conservative. Moreover, the footingroughness effect was significant in the weaker upper soil case and may have contributed to a 25 % higher bearing capacity.

Offshore foundationsBearing factor characteristicNumerical modellingFooting roughnessFailure mechanismLayered soils

Chao-Ming Chi、Zheng-Shan Lin、Yu-Shu Kuo

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Dept. of Civil Engineering, Feng Chia University, Taichung, 407802, Taiwan

Program for Infrastructure Planning and Engineering, Feng Chia University, Taichung, 407, Taiwan

Dept. of Hydraulic and Ocean Engineering, National Cheng Kung University, Tainan, 701, Taiwan

2023

10.51400/2709-6998.2713

Journal of Marine Science and Technology

Journal of Marine Science and Technology

ISSN：1023-2796
年,卷(期)：2023.31(4)
  • 36