Influence of Nonstationarity Characteristics of Earthquake Ground Motions on Inelastic Structural Response

本RIA项目的目标 是为了确定 频率非平稳性 地震地面运动 非弹性响应及相关 结构的损坏。 一个新的， 通用随机模型 在离散时间和 而连续时间将是 开发来代表所需的 地面运动的特征。 系统识别技术 将被开发来校准 真实的地震模型 记录 非线性随机 振动法将用于 深入了解 地震动非平稳性 线性和非线性结构 反应 非弹性模型 将考虑采取行动， 代表了现实的光滑 滞回性能， 逐渐恶化 开展的研究将 提供更好的理解 地震造成的破坏 结构和方式 受各种地面运动的影响 参数 它还将帮助 评估影响和相对 各种重要性 励磁和系统参数 结构统计 反应和损害。

The objective of this RIA project is to determine the effects of frequency nonstationarity in the earthquake ground motions on the inelastic response and related damage of structures. A new, versatile stochastic model formulated in both discrete-time and continuous-time will be developed to represent the desired features of the ground motion. System identification techniques will be developed to calibrate the model against real earthquake records. Nonlinear random vibration method will be used to gain insights into the effects of the ground motion nonstationarity on linear and nonlinear structural response. The models of inelastic action will be considered to represent the realistic smooth hysteretic behavior with progressive deterioration. The research undertaken will provide improved understanding of earthquake-induced damage in structures and the way it is influenced by various ground motion parameters. It will also help assess effects and relative importance of the various excitation and system parameters on the statistics of structural response and damage.