STrctPono
Structural
- Jan 9, 2020
- 706
When running a seismic analysis and including the soil structure interaction of the foundation, do you typically get P-Y curves from the Geotechnical Engineer that represent an upper-lower bound approach, i.e. soft and stiff spring conditions, or do you typically get one set of curves?
We typically work with only one specific geotech firm and they always provide us with one set of values. The only time we would run two different set of springs would be if we were performing a scour analysis with differing site conditions.
I wonder how truly representative this actually is? I guess if the site specific data is really straightforward and they have lots of borings, then the geotech can be confident with the parameters they provided. It seems that the pier and wharf industry pushes heavily for the upper and lower bound approach. My thought is that this is based on the fact that piers and wharves are inherently located in areas with soft soils and at depths that can unpredictably change.
We typically work with only one specific geotech firm and they always provide us with one set of values. The only time we would run two different set of springs would be if we were performing a scour analysis with differing site conditions.
I wonder how truly representative this actually is? I guess if the site specific data is really straightforward and they have lots of borings, then the geotech can be confident with the parameters they provided. It seems that the pier and wharf industry pushes heavily for the upper and lower bound approach. My thought is that this is based on the fact that piers and wharves are inherently located in areas with soft soils and at depths that can unpredictably change.