Identification Of Building Structures Research Articles

Influence of wind disturbance on smart stiffness identification of building structure using limited micro-tremor observation

While most of researches on system identification of building structures are aimed at finding modal parameters first and identifying the corresponding physical parameters by using the transformation in terms of transfer functions and cross spectra, etc., direct physical parameter system identification methods have been proposed recently. Due to the problem of signal/noise (SN) ratios, the previous methods are restricted mostly to earthquake records or forced vibration data. In this paper, a theoretical investigation is performed on the influence of wind disturbances on stiffness identification of building structures using micro-tremor at limited floors. It is concluded that the influence of wind disturbances on stiffness identification of building structures using micro-tremor at limited floors is restricted in case of using time-series data for low-rise buildings and does not cause serious problems.

Stiffness-damping simultaneous identification using limited earthquake records

A new method of stiffness-damping simultaneous identification of building structures is proposed using limited earthquake records. It is shown that when horizontal accelerations are recorded at the floors just above and below a specific storey in a shear building model, the storey stiffness and the damping ratio can be identified uniquely. The viscous damping coefficient and the linear hysteretic damping ratio can also be identified simultaneously in a numerical model structure. The accuracy of the present identification method is investigated through the actual limited earthquake records in a base-isolated building. It is further shown that an advanced identification technique for mechanical properties of a Maxwell-type model can be developed by combining the present method with a perturbation technique. Copyright © 2000 John Wiley & Sons, Ltd.

Uniqueness in the Identification of Building Structures from Forced Vibration Tests

This paper investigates the problem of uniqueness in the identification of building structural systems from data gathered during forced-vibration testing. Modelling the structure as an undamped discrete shear beam, it is shown that if the top floor response to a known forcing function which is also applied at the same location is available, then unique identification of the structural system is possible. Several useful results on the ability to uniquely identify some, but not all, of the stiffness constants of the system have also been obtained.