Seismic Design Maps for Engineers
We present here maps, data, and tools for engineers concerned with seismic design of structures. Currently we have tools for both buildings and bridges. Maps and data are based on several different design specifications from various external and cooperating oragnizations. Domestic (United States) data are based on the USGS Hazard Maps while foreign data (future) are based on other sources (such as GSHAP).
While design ground motions are based on hazard parameters from various sources, they differ from hazard because:
- The design values are the lesser of probabilistic and deterministic parameters.
- The probabilistic values are risk-targeted rather than uniform-hazard ground motions.
- Both the probabilistic and deterministic values are defined in terms of maximum-direction rather than geometric-mean horizontal spectral response accleration.
