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- Title
Failure envelope of a caisson foundation under combined vertical, horizontal and moment loadings.
- Authors
Boucheloukh, Abdellatif; Gong Weiming; Dai Guoliang; Zhu Mingxing
- Abstract
To investigate the bearing capacity of a caisson foundation under combined vertical, horizontal and moment loadings, the three-dimensional finite element analyses of a circular caisson foundation in homogenous sandy soil subjected to combined loadings are conducted. The caisson model has a depth to breadth ratio equaling one, and a soil-caisson interface friction coefficient µ = 0. 3. First, the responses of caisson foundations under uniaxial vertical loading V, horizontal loading H and moment loading M are examined. Moreover, the responses of caisson foundations under combined vertical-horizontal V-H, vertical-moment V-M and horizontal-moment H-M load space are studied and presented using normalized failure envelopes generated by the loadcontrolled method. Subsequently, the bearing behavior of caisson foundations under combined vertical-horizontalmoment V-H-M load space, as well as the kinematic mechanisms accompanying the failure under uniaxial and combined loading, are addressed and presented for different vertical load ratios VI Vu. Finally, three equations that approximate the three-dimensional shape of the failure locus are proposed, which provides a convenient means of calculating the bearing capacity of a caisson foundation subjected to uniaxial and combined vertical, horizontal and moment loadings.
- Subjects
CAISSON design &; construction; BEARING capacity (Bridges); SANDY soils; FINITE element method; LOADING &; unloading
- Publication
Journal of Southeast University (English Edition), 2020, Vol 36, Issue 2, p188
- ISSN
1003-7985
- Publication type
Article
- DOI
10.3969/j.issn.1003-7985.2020.02.009