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1997 Uniform Building Code ground-shaking criteria

, : 1997 Uniform Building Code ground-shaking criteria. Miscellaneous Publication - Utah Geological Survey 98-2(Pages 13-20, 51-58

The recently published 1997 Uniform Building Code (UBC) incorporates two significant changes to the ground-shaking criteria which apply to all structures. The first change is a revision to soil types and soil-amplification factors. The second change is the incorporation of near-source factors in UBC seismic zone 4. Together these changes result in the largest increases in code ground-shaking criteria in the past 30 years. Records obtained from the Strong Motion Instrumentation Program (SMIP) along with U.S. Geological Survey (USGS) records were the primary sources of data used to justify these code changes.


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