This study proposed a simple nonlinear equation to estimate damping modification factors (DMFs) to modify the elastic response spectral values for damping ratios between 10% and 50%. The DMFs are computed from the displacement, acceleration, and velocity response spectral of single-degree-of-freedom (SDOF) systems of 198 earthquake acceleration time histories from 40 earthquakes events of Peruvian database, grouped into three types of soil: hard soil, intermediate soil, and soft soil. For each soil group, 11 scaled records were selected according to the ASCE 7-16 standard to match the design spectrum of the Peruvian technical standard for seismically isolated structures E.031. Simplified approximate nonlinear period-dependent expressions were provided to compute DMFs from the Peruvian strong-motion database and were compared with DMFs available in the literature and national seismic design codes. The study showed discrepancies with the regulations worldwide.

中文翻译：

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秘鲁隔震系统设计的阻尼修正系数

本研究提出了一个简单的非线性方程来估计阻尼修正系数 (DMF)，以修正阻尼比介于 10% 和 50% 之间的弹性响应谱值。DMF 是根据秘鲁数据库 40 次地震事件的 198 次地震加速度时程的单自由度 (SDOF) 系统的位移、​​加速度和速度响应谱计算得出的，分为三类土壤：硬土、中性土、软土。对于每个土组，根据 ASCE 7-16 标准选择了 11 个比例记录，以匹配秘鲁隔震结构 E.031 技术标准的设计范围。提供了简化的近似非线性周期相关表达式来计算来自秘鲁强震数据库的 DMF，并将其与文献和国家抗震设计规范中可用的 DMF 进行比较。该研究表明与全球法规存在差异。