摘要
采用汶川地震近断层强震记录,分析了近断层记录基线校正的原则、不同基线校正方法的特点以及基线校正的不确定性因素。根据基线校正原则提出了基线校正的一般步骤,对比分析了在合理分界时间点范围内选择不同组时间分界点进行基线校正后各组记录之间的地震动参数和反应谱特性。结果表明,已有的各种基线校正方法并不能较好地得到准确的确定性基线校正结果,满足基线校正的一般原则也会得到不同的校正结果,但是合理地进行基线校正后,对加速度和速度时程相关的地震动参数和不同形式的反应谱特性的影响很小。
The principle,characteristics of different methods and indeterminate factors of baseline correction（BC） for near-fault strong motion records are analyzed using the near-fault records of Wenchuan earthquake.The general procedure for BC is put forward according to the principles,and the BC for records is conducted through choosing different groups of time points in the rational scope of time dividing points.The ground motion parameters and the response spectra of different corrected records are comparatively analyzed.The results show that the accurate determinate results could not be obtained by using current methods,and in spite of the principles for BC are satisfied,different results may also be obtained.However,through the rational BC,there are small effects on the analyzed results of the ground motion parameters related to acceleration,velocity and the response spectrum.
出处
《世界地震工程》
CSCD
北大核心
2011年第2期63-69,共7页
World Earthquake Engineering
基金
国家自然科学基金委重大研究计划项目(90715016)
安徽省自然科学基金项目(070415220)
关键词
汶川地震
基线校正
近断层
强震记录
Wenchuan earthquake
baseline correction
near-fault
strong ground motion records
