摘要
地震动峰值速度(PGV)是地震预警系统快速评估地震破坏性的关键参数。为解决现地预测方法无法预测异地PGV,以及区域预警方法受震级、地震动预测方程(GMPE)估算误差制约等问题,通过建立触发台站初至地震波位移幅值(Pd)与目标位置PGV之间的直接经验关系,提出一种基于单台站Pd的异地PGV快速预测方法(Pd-PGV),消除对震级估算的依赖。基于日本KiK-net强震数据的测试结果表明,与传统的Pd-M-PGV方法相比,该方法在初至地震波时长为3~6 s时预测准确性更高,能够提前2~3 s获得同等预测效果,且受震中距影响更小。所提方法为地震预警系统提供了一种兼具时效性和准确性的PGV预测新途径。
Peak ground velocity(PGV)is a key parameter for rapid assessment of earthquake damage in earthquake early warning(EEW)systems.To solve the problems of inability of on-site prediction methods to predict remote PGV,and the constraints of magnitude estimation errors and uncertainty in ground motion prediction equations(GMPE)on regional warning methods,a direct empirical relationship between the initial arrival seismic wave displacement amplitude(Pd)of triggering stations and PGV in target locations is established.A rapid prediction method for remote PGV based on single station Pd(Pd-PGV)is proposed.This method eliminates the dependence on earthquake magnitude estimation and achieves rapid prediction of remote PGV by a single station.Tests on Japan s KiK-net ground motion dataset show that,compared with traditional Pd-M-PGV method,Pd-PGV achieves higher accuracy for 3 to 6 s initial waves,delivers equivalent predictions 2 to 3 s earlier,and is less affected by epicentral distance.This method provides an efficient and accurate solution for PGV estimation in EEW systems.
作者
王阳
王延伟
WANG Yang;WANG Yan-wei(College of Civil Engineering,Guilin University of Technology,Guilin 541004,China;Guangxi Key Laboratory of Geomechanics and Geotechnical 0x09Engineering,Guilin University of Technology,Guilin 541004,China)
出处
《河南城建学院学报》
2025年第4期21-27,42,共8页
Journal of Henan University of Urban Construction
基金
广西自然科学基金项目(2023GXNSFAA026226)。
关键词
地震预警
异地PGV
快速预测
位移幅值
地震破坏性
earthquake early warning
remote peak ground velocity
rapid prediction
peak displacement amplitude
earthquake damage
