System Identification and Damage Assessment of Buildings Utilizing the Whittier Earthquake Data

采用时域系统辨识方法， 惠蒂尔地震记录。 目的是（1）研究 建筑物在地震中的行为，（2）识别能量 建筑物-地基系统的耗散能力，以及（3） 关联和校准建筑物损坏的程度， 地面震动的过程 研究的新特点包括：（1）非线性分析， 等效线性系统的时变段项，（2）使用 的非经典模态综合方法，和（3）使用多- 变量系统辨识技术（SID）。 该研究有望使SID的发展更加紧密， 它在地震分析和设计中实际应用，例如 作为时间函数的结构响应和损伤的预测。

Time-domain system identification method is used to analyze the Whittier earthquake records. The objectives are (1) to study the building behavior during the earthquake, (2) to identify energy dissipation capabilities of the building-foundation system, and (3) to correlate and calibrate the degree of building damage during the course of ground shaking. New features of the investigation include (1) nonlinear analysis in terms of time-varying segments of equivalent linear systems, (2) use of a nonclassical modal synthesis approach, and (3) use of a multi- variate system identification technique (SID). The research is expected to bring closer the development of SID and its practical use in earthquake analysis and design, such as prediction of structural response and damage as a function of time.