CAJ | 학술논문

提出一种基于小波方法的考虑近断层多个脉冲地震动的分析方法（multiple pulse analysis，MPA），选取 COSMOS 地震动数据库台湾集集地震事件中断层距小于30 km 的83组水平向地震动的数据，阐述了 MPA 方法的原理与实现，并利用 MPA方法识别与分析了63组属于脉冲波的地震动速度时程。结果表明，考虑多个脉冲波对分析近断层脉冲型地震动特性的必要性，并讨论了断层距对近断层脉冲震动最强方向与理论方向差值，以及显著小波个数的影响关系。
제출일충기우소파방법적고필근단층다개맥충지진동적분석방법（multiple pulse analysis，MPA），선취 COSMOS 지진동수거고태만집집지진사건중단층거소우30 km 적83조수평향지진동적수거，천술료 MPA 방법적원리여실현，병이용 MPA방법식별여분석료63조속우맥충파적지진동속도시정。결과표명，고필다개맥충파대분석근단층맥충형지진동특성적필요성，병토론료단층거대근단층맥충진동최강방향여이론방향차치，이급현저소파개수적영향관계。
A multiple pulse analysis (MPA)method is proposed to classify and characterize the near-fault earthquake characteri-zing multiple pulses based on wavelets method.83 sets of horizontal strong ground motions whose closest distance to fault are all kept within 30 km from Taiwan Chi-Chi earthquake are selected from the COSMOS virtual data center for analysis.The principle of MPA is depicted in details,and 63 sets of earthquake records chosen previously are classified as pulse-like ground motion by MPA method.The results indicate that the MPA method provides a better representation and classification performanle for near-fault earthquake records characterizing multiple pulses.The influences of the closest distance to fault on the difference between the strongest direction and the theoretical strongest direction as well as the number of pulse are also discussed.