Seismic Retrofit
Seismic Retrofit
(OP)
Hi,
Thank you in advance for your opinions and recommendations.
We need to perform a structural retrofit analysis for a 6 story building built in the 60s. We have as built/construction plans that shows the foundation system to be 24-inch diameter piers drilled to 35 and 40 feet. We need to perform a geotechnical investigation to check the adequacy of the design with resepect to the foundation and seismic considerations. We are thinking to drill and sample using hollow stem drill rigs and CPTs. This is enough in my opinion to gather data to perform the seismic design and seismic hazards calculations. When do you consider using a geophysical survey for a seismic retrofit?
Thank you in advance for your opinions and recommendations.
We need to perform a structural retrofit analysis for a 6 story building built in the 60s. We have as built/construction plans that shows the foundation system to be 24-inch diameter piers drilled to 35 and 40 feet. We need to perform a geotechnical investigation to check the adequacy of the design with resepect to the foundation and seismic considerations. We are thinking to drill and sample using hollow stem drill rigs and CPTs. This is enough in my opinion to gather data to perform the seismic design and seismic hazards calculations. When do you consider using a geophysical survey for a seismic retrofit?





RE: Seismic Retrofit
RE: Seismic Retrofit
RE: Seismic Retrofit
RE: Seismic Retrofit
I gave what we have in hand. Even the City does not have further info. Thanks for ur advise.
RE: Seismic Retrofit
As far as geophysical, I would consider using that about the same time I would on new construction - when it makes a difference in the site class (if using IBC) and thus causes a significant change in structural costs.
RE: Seismic Retrofit