New Seismic Zoning Map of China and Its Application in Earthquake Disaster Mitigation

摘要

The New Seismic Zoning Map of China was prepared from 1987 to 1990 and officially promulgated in 1991. In comparison with the previous two seismic zoning maps prepared in 1957 and 1977, some new methods were applied to upgrade the method currently used for seismic hazard analysis. First, a probabilistic method was used instead of the deterministic analysis was used for previous mapping. Second, by taking advantages of the long history of historical seismic data in China, the nonhomogeneity of seismicity both in space and in time has been fully considered and hence the over- and/or underestimation of seismic hazard could be avoided. Third, the results of middle- and long-term earthquake prediction based on tectonic evidence have been incorporated into seismic hazard analysis. In addition, the attenuation laws for both intensity and peak acceleration of strong motion as the mapping parameters are also presented. Finally, an evaluation of the New Seismic Map and its effect on engineering application, such as aseismic design and construction, preassessment of seismic damage, the strengthening of existing hazardous buildings, and the estimating of earthquake losses, is given.