Gridded earthquake ground motions for the 2020 NEHRP Recommended Seismic Provisions and 2022 ASCE/SEI 7 Standard

For designing buildings and other structures, the 2020 NEHRP Recommended Seismic Provisions and the 2022 ASCE/SEI 7 Standard provide Risk-Targeted Maximum Considered Earthquake (MCER) spectral response accelerations and Maximum Considered Earthquake Geometric Mean (MCEG) peak ground accelerations. The MCER ground motions are also expected to be in the 2023 ASCE/SEI 41 Standard and the 2024 and 2027 editions of the International Building Code. Both sets of ground motions are derived from USGS National Seismic Hazard Models via the gridded values of this data release. The files in the "Child Items" below also underlie corresponding USGS Seismic Design Web Services. See the "Related External Resources" below for links to the building code reference documents (which include explanations of differences with respect to prior editions), the USGS National Seismic Hazard Models used, and the corresponding USGS web services.

在建筑及其他结构的设计工作中，2020年美国国家地震减灾计划（National Earthquake Hazards Reduction Program, NEHRP）推荐抗震条款，以及2022年美国土木工程师学会/结构工程研究所（American Society of Civil Engineers/Structural Engineering Institute, ASCE/SEI）联合发布的《ASCE/SEI 7标准》，均提供了风险目标最大考量地震（Risk-Targeted Maximum Considered Earthquake, MCER）频谱响应加速度，以及最大考量地震几何均值（Maximum Considered Earthquake Geometric Mean, MCEG）峰值地面加速度。MCER地震动也将被纳入2023年ASCE/SEI 41标准，以及2024版与2027版《国际建筑规范》。上述两类地震动均基于美国地质调查局（United States Geological Survey, USGS）国家地震危险性模型，通过本次数据发布的网格化数值推导得到。下方“子项”中包含的文件，同时为USGS地震设计Web服务提供了支撑。如需获取建筑规范参考文件（包含与此前版本差异的说明）、所用USGS国家地震危险性模型，以及对应USGS地震设计Web服务的链接，请参阅下方“相关外部资源”。