【摘要】 从集集主震记录中选取有代表性的246个台站的记录作为数据集。在总结国内外基线校正方法的基础上,提出以下校正步骤:(1)初步判定记录中是否包含永久位移信息以便选用不同的校正方法。(2)以积分位移时程的末端平稳为标准,来确定积分速度时程末端拟合出的最优直线斜率作为校正量,去校正原始加速度时程,从而保留永久位移信息。永久位移等值线结果与GPS测量结果大体相符。根据校正结果推测认为:瞬变后保持或扩张或部分回弹,可能是决定永久位移形态的主要物理机制。更多还原

【Abstract】 By selecting the representative accelerograms of 246 stations from Chi-Chi main shock as basic data,and reviewing kinds of overseas and internal base line correction methods,we make process as follows:(1)Judging the existence of permanent displacement(PD) in accelerograms to choose a method.(2)Finding out the permanent balance point of displacement history to determe the best linear-fitting to revise original accelerogram.By revising the original accelerogram,the graphs of PD isoline macth the graphs of GPS isoline closely.A conclusion is drawn according to the revised results: the three models of oscillating,rebounding and extending are the mechanism that controls the states of PD.更多还原