Abstract
Because of various reasons, the baseline drift in the strong motion accelerogram was often founded, especially in the near-fault accelerogram. The baseline drift could lead to the unreliable velocity and displacement obtained by the accelerogram integration without or with improper specialized baseline correction. For dealing with the problem, in the study, the various reasons causing the baseline drift in accelerogram were analyzed, the baseline correction principle and the different baseline correction methods were discussed, and the problems in the methods were pointed out.
Highlights
In 1923, the great Kanto earthquake of ML7.9 occurred, causing a lot of death and economic losses
In 1931, Maihiro Kyoji was invited to visit America by the American Civil Engineering Association (ASCE), where he emphasized that measuring the acceleration response of the structure under earthquake load for aseismic design was very important
On March 10, 1933, the first strong motion accelerogram was recorded in Long Bench Earthquake, California, which was the birth of strong motion observation [1, 2]
Summary
In 1923, the great Kanto earthquake of ML7.9 occurred, causing a lot of death and economic losses. Japanese earthquake researchers thought to develop an instrument used to directly record the real strong ground motion and building structure earthquake response for aseismic design for building structure. In 1931, Maihiro Kyoji was invited to visit America by the American Civil Engineering Association (ASCE), where he emphasized that measuring the acceleration response of the structure under earthquake load for aseismic design was very important. Strong motion observation is an important work in earthquake engineering study. The main purpose of this work is to obtain credible ground motion record and engineering structures response record under earthquake load, which is the basic data for building structural aseismic design code. The data processing of strong motion accelerogram is an important task
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