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Title:: Analysis on Site Response Based on Strong Motion Records of the Ning'er Earthquake

作者:: 王赟赟¹; 2; 钱进²; 崔建文²; 黄建华¹; (1.中国科学技术大学地球和空间科学学院,合肥 230026; 2.云南省地震局,昆明 650224)

Author(s):: WANG Yun-yun¹; 2; QIAN Jin²; CUI Jian-wen²; HUANG Jian-hua¹; (1.School of Earth and Space Sciences,University of Science and Technology of China,Hefei 230026,Anhui,China)(2.Earthquake Administration of Yunnan Province,Kunming 650224,Yunnan,China)

Keywords:: records of strong motion; Nakamura method; site response; microtremor; Ning'er earthquake

摘要:: 采用Nakamura 方法,利用2007年6月3日宁洱地震强震动记录S波资料和脉动观测资料,计算了宁洱震区一些强震动台的场地响应。结果表明,当台站场地为基岩或覆盖层较薄时,由脉动数据和S波数据分别计算的谱比曲线一致性很好。当覆盖层大于35 m的时候,两者的谱比值有差异,即用S波计算的场地放大响应要明显大于用脉动计算的场地响应。

Abstract:: In this paper,we calculate the strong motion site responses by the Nakamura method based on the pre-seismic microtremor and S wave data recorded during Ning'er earthquake on 3 June 2007.The site response spectra of microtremor and S wave are consistent in general for basement rock site or thin-overburden site.However,for thick-overburden site over 35 meters,both spectral ratio curves have obvious differences,which means that the site response spectra calculated by ground micro-tremor is much bigger than that calculated by S wave.