Finite element model updating of a historical minaret via operational modal analysis
Küçük Resim Yok
Tarih
2017
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
International Operational Modal Analysis Conference (IOMAC)
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Finite element method is commonly used for analysis of historical structures. However, since material properties of historical structures are evaluated from destructive tests using empirical formulas, this approach makes the results of finite element analysis questionable. In recent years Operational Modal Analysis of historical masonry structures have found great interest because by the help of Operational Modal Analysis, the material parameters and the boundary conditions can be verified and the finite element model can be updated. The updated model is a more realistic model of the historical structures and gives more accurate results. This study describes the results of a model updating study conducted on a historical minaret. For the purposes of developing a 3-D solid model of the minaret; the dimensions, defects and material degradations in the minaret were determined in detail by making a measurement survey. For evaluation of the material properties of the minaret, nondestructive and destructive testing methods were applied. The modal analysis of the structure was done by FEM. Then, Operational Modal Analysis was carried out and dynamic properties were extracted. The results obtained from ambient vibration measurements of the minaret were used to update the finite element model of the minaret. The natural frequencies and corresponding mode shapes were determined from both theoretical and experimental modal analyses and compared with each other. A good harmony was attained between mode shapes, but differences between natural frequencies were observed. Model updating was realized via changing material parameters and boundary conditions. Finally, the more realistic finite element model of the minaret was put forward and the results were discussed.
Açıklama
Bruel and Kjaer;Dynamic Design Solutions (DDS);Kotter Consulting Engineers;Polytec;Siemens;Structural Vibration Solutions
7th International Operational Modal Analysis Conference, IOMAC 2017 -- 10 May 2017 through 12 May 2017 -- 128320
7th International Operational Modal Analysis Conference, IOMAC 2017 -- 10 May 2017 through 12 May 2017 -- 128320
Anahtar Kelimeler
Dynamic characteristic, Historical masonry minaret, OMA
Kaynak
IOMAC 2017 - 7th International Operational Modal Analysis Conference
WoS Q Değeri
Scopus Q Değeri
N/A
