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S_DS Heat Map

S_DS Heat Map

S_DS Heat Map

Wondering if there is a heat or contour map out there of S_SDS values. I understand there are low-resolution SM1 Maps in ASCE, and also the ASCE Hazard mapping tool to get site specific data. But I am sort of looking for combination of the two, to visually show the SDS values in high resolution. I have found similar tools , but are more on "hazard rating" or "probability of shaking" (https://mtc.maps.arcgis.com/apps/webappviewer/inde..., https://gis.dogami.oregon.gov/maps/hazvu/)

It seems that with all the mapping tools out there today, somebody must have done this.

RE: S_DS Heat Map

You may have already seen it in the ASCE Hazard tool, but you can turn on a PGA overlay once you select a risk category and then toggle the overlay button. Haven't seen an Sds-specific map yet unfortunately.

I occasionally glance at openquake for high-level comparisons between different places in the world as well, which plots Seismic PGA for 10% in 50 years, however definitely don't rely on these numbers for any structural design (which they state in a disclaimer).


RE: S_DS Heat Map

I don't think you're going to find exactly what you're looking for since SMS, SM1, Sds, Sd1 are all based on soil site class which of course varies from site to site. So, you can find these heat maps for your Ss and S1 values I suspect. But like Luceid's map shows, you can just set site class to "default" which will give you a fairly good upper bound on what you can expect for Sds, etc.

Here's some stuff I found though:


Semi-hi-res SM1 map for default-D site class:


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