Model Errors in Bearing Capacity of Vertically Loaded Foundations
Publication: Foundation Engineering in the Face of Uncertainty: Honoring Fred H. Kulhawy
Abstract
This paper scrutinizes the model error in the ultimate bearing capacity of grouped-pile foundations and shallow foundations. First, the model uncertainty of (observed value)/(calculated value) is evaluated for grouped-pile foundations using the statistics of the load test datasets of the several single piles at the same locations. The system reliability of a pile group is estimated considering the fact that the variability in the average bearing capacity of piles decreases as the number of the piles increases. Second, the model uncertainty is evaluated for shallow foundations, considering the scale effect on the bearing capacity. The statistics show that the model error is not dependent on the effective footing width when the calculation considers the scale effect relevantly. The bearing capacity on soft rocks tends to be overestimated and an additional modifier should be considered regarding the resistance factor or in-situ plate-loading tests should be conducted in addition to typical laboratory tests for estimating characteristic soil parameter values.
Get full access to this article
View all available purchase options and get full access to this chapter.
Information & Authors
Information
Published In
Copyright
© 2013 American Society of Civil Engineers.
History
Published online: Mar 28, 2013
ASCE Technical Topics:
- Design (by type)
- Engineering fundamentals
- Engineering mechanics
- Errors (statistics)
- Field tests
- Foundation design
- Foundations
- Geotechnical engineering
- Load bearing capacity
- Load factors
- Load tests
- Mathematics
- Shallow foundations
- Static loads
- Statics (mechanics)
- Statistics
- Structural design
- Tests (by type)
- Ultimate loads
- Vertical loads
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.