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

地震地震动非平稳特性对非弹性结构响应的影响

• 批准号: 9210585
• 负责人: Joel Conte
• 金额: --
• 依托单位: William Marsh Rice University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-06-01 至 1997-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9210585&HistoricalAwards=false
• 关键词: Influence; Nonstationarity; Characteristics; Earthquake; Ground

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.

RIA项目的目的是确定地震地面运动中频率非平稳性对结构的非弹性响应和相关损害的影响。 将开发出一个新的，多功能的随机模型，以离散时间和连续时间为代表地面运动的所需特征。 将开发系统识别技术来针对实际地震记录校准模型。 非线性随机振动方法将用于洞悉地面运动非组织性对线性和非线性结构响应的影响。 非弹性作用的模型将被视为代表逐渐恶化的现实平滑滞后行为。 进行的研究将提高人们对结构中地震造成的损害的理解及其受各种地面运动参数影响的方式。 它还将有助于评估各种激发和系统参数对结构响应和损害统计的影响和相对重要性。