摘要
地震动衰减关系是估算场地地震动的主要方法之一。基于强震记录建立衰减关系是最直接且合理的方式。然而,中国许多地区缺乏强震记录,研究这些区域的地震动衰减关系对于提升地震动预测能力至关重要。针对中国缺乏强震记录地区地震动衰减关系研究中的数据稀疏与模型适用性难题,该研究系统总结了在缺乏强震记录地区建立地震动衰减关系的主要方法,包括借用外部数据(通过引用相似构造区数据弥补空白)、数值模拟(基于物理模型生成合成数据)、烈度转换(利用烈度资料推导地震动参数)、混合经验法(结合物理模拟与经验校正)、参考经验法(基于实测数据修正经验模型)及通用可调衰减关系(通过参数调整适配不同区域)等。研究对上述方法的适用性、优缺点及核心思路进行了系统性梳理和比较分析,并结合中国强震记录的最新现状与研究进展,深入探讨了借鉴美国NGA-East项目经验在中国类似地区建立衰减关系时的关键问题与策略。研究结果可为完善中国地震动预测模型提供科学支撑,并为工程抗震设计和地震安全性评价提供参考。
Ground motion attenuation relationship is one of the primary methods for estimating site ground motion.Establishing attenuation relationships based on strong-motion records is the most direct and robust approach.However,many regions in China lack strong-motion records,making it crucial to study the ground motion attenuation relationships in these areas to enhance seismic motion prediction capabilities.This research addresses the challenges of data scarcity and model applicability in ground motion attenuation relationship research in regions of China lacking strong-motion records.It systematically summarizes the main methods for developing ground motion attenuation relationships in regions with insufficient strong-motion records,including borrowing external data(by citing data from similar tectonic regions to fill gaps),numerical simulation(generating synthetic data based on physical models),intensity conversion(deriving ground motion parameters from intensity data),hybrid empirical method(combining physical simulation with empirical corrections),referenced empirical method(correcting empirical models based on recorded data),and generalized adjustable attenuation relationships(adapting to different regions through parameter adjustment).The study systematically reviews and comparatively analyzes the applicability,advantages,disadvantages,and core ideas of these methods.Furthermore,by integrating the latest status and research progress of strong-motion records in China,the paper deeply explores key issues and strategies for establishing attenuation relationships in similar regions in China by drawing on the experience of the NGA-East project in the United States.The findings provide scientific support for improving China’s ground motion prediction models and offer valuable references for seismic engineering design and seismic hazard assessment.
作者
刘森
俞言祥
傅磊
肖亮
LIU Sen;YU Yanxiang;FU Lei;XIAO Liang(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)
出处
《振动与冲击》
北大核心
2025年第24期233-245,319,共14页
Journal of Vibration and Shock
基金
国家重点研发计划(2022YFC3003503)。
关键词
强地面运动
地震动衰减关系
缺乏强震记录
strong ground motion
ground motion attenuation relationship
lack of strong-motion records
