Base line correction method for near-fault accelerograms using Chi-Chi main shock record
Yanxiang Yu · Dizhen gongcheng yu gongcheng zhendong · 2007
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.