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Investigation of effectiveness of effective area method for assessing undrained capacity of shallow rectangular foundations

Investigation of effectiveness of effective area method for assessing undrained capacity of shallow rectangular foundations
Investigation of effectiveness of effective area method for assessing undrained capacity of shallow rectangular foundations
This paper investigates the effectiveness of the effective area method (EAM) for assessing the undrained load-carrying capacity of rectangular foundations under combined vertical (V), horizontal (H) and moment loading (M) by comparing with finite-element method (FEM) results. Predicted ultimate limit states under combined loading from the two methods are compared and the equivalent rectangle derived from the EAM is compared with the contact region obtained from the FEM. For one-way eccentricity, good agreement in the V-M capacity is achieved with the two methods despite differences between the effective area and actual contact area. However, V-M capacity for two-way eccentricity obtained from the EAM is significantly smaller than that derived from the FEM, with the discrepancy becoming more pronounced with increasing mobilisation of the vertical capacity. V-H-M failure envelopes established by the EAM also fall significantly inside those determined using FEM. The contributing factors for the discrepancies are explored systematically in the paper.
1090-0241
Feng, Xiaowei
33d164d1-5589-41f6-995a-9b17374bdd0c
Gourvenec, Susan
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
Randolph, Mark F.
05c8dec9-cf94-42ef-8b4c-82bce017c82a
Teng, Renjie
1ace7541-76a9-4b1d-9b30-fbaf839996c6
Feng, Xiaowei
33d164d1-5589-41f6-995a-9b17374bdd0c
Gourvenec, Susan
6ff91ad8-1a91-42fe-a3f4-1b5d6f5ce0b8
Randolph, Mark F.
05c8dec9-cf94-42ef-8b4c-82bce017c82a
Teng, Renjie
1ace7541-76a9-4b1d-9b30-fbaf839996c6

Feng, Xiaowei, Gourvenec, Susan, Randolph, Mark F. and Teng, Renjie (2019) Investigation of effectiveness of effective area method for assessing undrained capacity of shallow rectangular foundations. Journal of Geotechnical and Geoenvironmental Engineering, 145 (2). (doi:10.1061/(ASCE)GT.1943-5606.0002009).

Record type: Article

Abstract

This paper investigates the effectiveness of the effective area method (EAM) for assessing the undrained load-carrying capacity of rectangular foundations under combined vertical (V), horizontal (H) and moment loading (M) by comparing with finite-element method (FEM) results. Predicted ultimate limit states under combined loading from the two methods are compared and the equivalent rectangle derived from the EAM is compared with the contact region obtained from the FEM. For one-way eccentricity, good agreement in the V-M capacity is achieved with the two methods despite differences between the effective area and actual contact area. However, V-M capacity for two-way eccentricity obtained from the EAM is significantly smaller than that derived from the FEM, with the discrepancy becoming more pronounced with increasing mobilisation of the vertical capacity. V-H-M failure envelopes established by the EAM also fall significantly inside those determined using FEM. The contributing factors for the discrepancies are explored systematically in the paper.

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2018_ASCE Geotechnical & Geoenvironmental Engng_Feng et al - Accepted Manuscript
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More information

Accepted/In Press date: 19 July 2018
e-pub ahead of print date: 6 December 2018
Published date: February 2019

Identifiers

Local EPrints ID: 422758
URI: http://eprints.soton.ac.uk/id/eprint/422758
ISSN: 1090-0241
PURE UUID: 6ac55178-a4c5-4db9-811e-9024731918a0
ORCID for Susan Gourvenec: ORCID iD orcid.org/0000-0002-2628-7914

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Date deposited: 03 Aug 2018 16:30
Last modified: 08 Jan 2022 06:49

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Contributors

Author: Xiaowei Feng
Author: Susan Gourvenec ORCID iD
Author: Mark F. Randolph
Author: Renjie Teng

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