Modelling and identification of tower type historic buildings

• Autorzy: Szymczak C. , Tomaszewska A.
• Konferencja: Jubilee Symposium Vibrations In Physical Systems (25 ; 15-19.05.2012 ; Będlewo koło Poznania ; Polska)
• Języki publikacji: EN

Abstrakty

EN

In this paper the problem of parametric identification of a historic masonry tower model is discussed. The tower leans and its foundation stiffness is a concern to authorities. The authors identified some modal characteristics of the tower, natural frequencies and mode shapes. It is known, based on the first mode shape identified, that the structure behaves like a stiff solid on elastic foundation. Thus, a simple, five parameter plane model is considered. The unknown parameters are identified to be the solution to an optimisation problem, in which the sensitivity analysis and scatters of the modal identification are applied. A hierarchical process is formulated, where two natural frequencies are assumed to be the input data. In this approach, the number of unknown parameters increases incrementally, and the process changes from even-posed to under-posed successively. Such approach allows one to control the final under-posed identification problem and leads to an increasingly better solution.

Słowa kluczowe

EN

identification; modelling; optimisation; sensitivity analysis; masonry tower

PL

identyfikacja; modelowanie; optymalizacja; analiza wrażliwości; wieża murowana

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2012
• Tom: Vol. 25
• Strony: 411--416
• Opis fizyczny: Bibliogr. 4 poz., 1 fot., 1 wykr.

Twórcy

autor

Szymczak C.

• Gdansk University of Technology, Faculty of Ocean Engineering and Ship Technology, Narutowicza 11/12, 80-233 Gdansk, Poland

autor

Tomaszewska A.

• Gdansk University of Technology, Faculty of Civil and Environmental Engineering, Narutowicza 11/12, 80-233 Gdansk, Poland

Bibliografia

• 1. Bendat JS, Piersol AG. Engineering applications of correlation and spectral analysis. John Wiley & Sons, Inc.; 1980.
• 2. Bendat JS. Statistical errors in measurement of coherence functions and input/output quantities. J. Sound and Vibration 1978;59:405-21.
• 3. Tomaszewska A. Influence of statistical errors on damage detection based on structural flexibility and mode shape curvatures. Computers and Structures, 2010;88:154-64.
• 4. Szymczak C. Elem teorii projektowania.