NZGS Symposium

Performance-based seismic design of shallow foundations

The current practice in New Zealand for seismic design of shallow foundations is to ensure the LRFD inequality is satisfied, meaning not all of the available bearing strength is mobilised. However, the occurrence of bearing failure may be acceptable, provided the resulting permanent displacements are also acceptable. One method of modelling the displacements of shallow foundations during an earthquake is presented. The method uses a ‘macro-element’ to represent the interaction of the foundation and underlying soil in response to an earthquake, and describes important features of foundation response, including elastic behaviour at small strains, bearing failure, and plastic displacements post-failure. It is well suited to routine structural analysis, and can be used in integrated performance-based design of structure-shallow foundation systems.

Tags : #Performance based seismic design#Seismic#Shallow foundations#Soil-structure interaction

Downloads
NZGS_Symposium_18_31-3.pdf
Published
09/01/2008
Collection
NZGS Symposium
Authors(s)
Jeremy Toh, Michael Davies, Mick Pender
Compilation
NZGS Symposium>18th NZGS Symposium
Link
N/A
Issue
1
Volume
34
Version
N/A
Location
N/A
Type
Paper
Tags
N/A
ISBN
ISSN
0111-9532

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