This article presents recommendations for nonlinear site amplification models in Central and Eastern North America (CENA), which are developed from one-dimensional site response analyses results and accompanies linear site amplification model in a companion article. Two median nonlinear amplification models using identical functional forms are produced as a function of VS30 and peak ground acceleration for reference conditions (PGAr) of VS = 3000 m/s and VS30 = 760 m/s. An epistemic uncertainty model on median nonlinear amplification is proposed as a piecewise functional form to generate reasonable variations of nonlinear amplification across the period and VS30 ranges of interest. Limitations of the models are based on both the methodology of the model derivation and assumptions of nonlinear amplification model forms.

中文翻译：

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北美中部和东部遍历地震灾害分析的非线性场地放大模型

本文提出了对北美中部和东部 (CENA) 非线性场地放大模型的建议，这些模型是根据一维场地响应分析结果开发的，并在配套文章中随附线性场地放大模型。使用相同函数形式的两个中值非线性放大模型作为 VS30 和峰值地面加速度的函数生成，参考条件 (PGAr) 为 VS = 3000 m/s 和 VS30 = 760 m/s。提出了中值非线性放大的认知不确定性模型作为分段函数形式，以在感兴趣的周期和 VS30 范围内生成非线性放大的合理变化。模型的局限性基于模型推导的方法和非线性放大模型形式的假设。