中美地震区划图对比分析

The Comparison of the Seismic Zoning Maps between China and the USA

为探索给出我国下一代地震区划图修订建议,本文详细对比了中美现行的地震区划图异同,主要从主要特点、地震危险性计算、地震活动性模型以及地震动衰减关系等4个方面进行了分析。对比结果表明:中美地震区划图各自具有本国地震环境相适应的特色;两国地震区划都以抗倒塌作为编图的基本原则;美国地震区划图更注重地震活动较强的强震区,并专门建立了相应的地震危险性模型;在地震动衰减方面,相比于中国地震区划,美国地震区划对美国东西部根据各自特点分别建立了多种衰减关系。本文的结果和结论可供我国下一代新的地震区划图编制与修订参考。

The paper compares the similarities and differences from the main characteristic,the calculation of seismic hazard,the seismic model and the seismic attenuation relation of the seismic zoning maps between China and the USA in order to explore some suggestions of the seismic zoning map of China of next generation for revision. The results show that the seismic zoning map of China and the USA has its own characteristics corresponding to its own seismic environment; the seismic zoning map in both countries takes anti-collapse capacity as the basic principle; the seismic zoning map of the USA pays more attention to the strong ground motion zone with strong seismic activity,and establishes the corresponding seismic risk model; the seismic zoning map of the USA has established a variety of attenuation relationships for the eastern and western regions of the United States according to their respective characteristics compared with the seismic zoning map of China. The results and conclusions of the paper could be referred to the compilation and revision for the seismic zoning map of China of next generation.