日本长周期地震动业务体系概述

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关键词日本气象厅；长周期地震动；长周期地震动预报；长周期地震动观测中图分类号：P315 文献标识码：A 文章编号：2096-7780（2025）05-0267-12doi：10.19987/j.dzkxjz.2024-045

AbstractLong-period ground motion （LPGM） can result in prolonged vibration and even damage or colapse of structures and infrastructure withlong naturalvibration periods.With theemergenceofflexible structures suchas highrise buildings and large oil tanks inour country，there is anurgent need to efectively mitigate LPGM-related damage. However，the national intensity rapid reporting and early warning project currently does not include early warning or related nformation dissemination forLPGM.This paper introduces in detail the development ofJapan'sLPGM business system，ncldingtheiitialproposal，systemcostruction，anditscontiuousimprovement.Itdesribeskeytchologies involved inthedevelopmentofthis system，suchas theclassficationofLPGMandthe establishmentofLPGMprediction technology.The paper also summarizes the application of the LPGM business system and the research and development of supporting disaster reduction facilities.Finally，basedon Japan’sexperience inconstructing a long-periodground motionservice system“Observe business first，then develop predictive technologies，and finally implement predictive services”，some suggestions are proposed for the future construction of China’s long-period ground motion service system.

KeywordsJapan Meteorological Agency; long-period ground motion; long-period ground motion prediction; longperiod ground motion observation

0 引言

在地震工程研究领域，长周期地震动一般指卓越周期为2s及以上的地震动，卓越周期上限大于工程关心长周期结构的基阶自振周期。（剩余14579字）