地震安全性评价中的历史地震核查OA

In accordance with Clause 6.2.1 of the national standard GB 17741-2025 Evaluation of Seismic Safety for Engineering Sites,a technical method for verifying historical earthquake parameters is established.This method targets historical seismic events that may influence the results of seismic safety evaluation and exhibit cognitive differences in parameters.These events are typically located in potential source zones that contribute to ground-motion parameters with a 10％probability of exceedance in 50 years.By systematically compiling research findings on relevant earthquake parameters,with particular emphasis on thematic outcomes from recent studies on seismic zoning and active faults,the method analyzes whether the reliability of historical seismic data has been properly considered and whether the seismogenic structures and earthquake parameters have been clearly defined.For historical earthquake parameters that remain subject to cognitive divergence,historical earthquake research methods are employed to comprehensively collect historical seismic data,conduct field investigations when necessary,and redetermine the earthquake parameters.Using the 1668 Tancheng M 8½ earthquake and the 1624 Zhenjiang earthquake as examples,this paper illustrates verification methods and tasks under different scenarios.The approaches used in these two cases serve as references for verifying historical earthquake parameters in seismic safety evaluations.