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提出了场地总体非线性动力特性识别的一个方法。方法以一已知参考场地为基础,假定待识别场地和参考场地具有相同的基岩露头运动,根据待识别场地和参考场地地表强震和弱震记录,识别场地的总体非线性动力特性。以天津地区两个实际场地(一个作为参考场地,一个作为待识别场地)为例对场地总体非线性动力特性进行了识别。研究表明:方法能准确识别场地总体非线性动力特性,可直接应用于实际工程。
A method to identify the overall nonlinear dynamic characteristics of the site is proposed. The method is based on a known reference site. Assuming that the site to be recognized and the reference site have the same bedrock outcrop movement, the overall nonlinear dynamic characteristics of the site are identified according to the strong earthquakes and the strong earthquakes recorded on the surface of the site to be identified and the reference site. Taking the two actual sites in Tianjin (one as reference site and one as site to be recognized), the overall nonlinear dynamic characteristics of the site are identified. The research shows that the method can accurately identify the overall nonlinear dynamic characteristics of the site and can be directly applied to the actual project.