(343)310-00-99
sprut@sitis.ru
IWSHM-2011
Identifying Foundation Impedance Properties from Seismic Records
Identifying Foundation Impedance Properties from Seismic Records [1381]
Автор(ы): A. Irizarry, D. Bernal, L. Suarez
Издательство: DEStech Publications, Inc., 439 North Duke Street, Lancaster, Pennsylvania 17602 U.S.A., www.destechpub.com
Количество страниц: 8
Год: 2011
Аннотация[432 КБ] 
Код: 10347
Описание
According to a 1995 article published in Civil Engineering Magazine [1], more than 100,000 bridges over water in the United States have what is known as "unknown foundations." The fact that the details of the foundations and surrounding soil are not known implies that an accurate structural condition assessment of the bridges cannot be performed. Several approaches have been proposed in order to determine the needed physical parameters to complete the assessment process, although traditional methods tend to be work intensive, time consuming and costly. In this paper an approach under investigation is presented which uses existing seismic records in conjunction with system identification and model updating techniques. The goal is to determine the information needed to create a simplified but calibrated model of the structure. The proposed methodology focuses on the foundations and surrounding soil and employs the lumped-parameter model approach to account for them. A numerical example of a simplified soil-structure system which uses the proposed methodology to identify the model's free parameters is presented. Also, a brief theoretical background of the methodology is included.
Содержание