Modal frequency shift analysis for prestressed concrete beams developed by integrity loss

• Autorzy: Zielnica J. , Barczewski R.
• Konferencja: Symposium Vibrations In Physical Systems (23 ; 28-31.05.2008 ; Będlewo koło Poznania ; Polska)
• Języki publikacji: EN

Abstrakty

EN

The paper presents a method of initial analysis of the modal parameter change (e.g. modal frequency shift) due to progressive integrity loss for prestressed concrete beams (sensitivity analysis). A global rescaling method of the numerical modal frequency set was proposed in order to fit the real vibration components determined experimentally. The aim of simulation is numerical determination of frequency modal components and modes for specific boundary conditions, determined by the tested element support system. On the basis of static and dynamic FEM simulation results the optimal location of excitation points, location of transducers recording structure vibration response can be determined. The presented methodology can be helpful and is necessary for determination of possibilities of application of VA methods for testing the prestressed concrete structures.

Słowa kluczowe

EN

structure testing; FEM analysis; prestressed concrete; fault detection

PL

badanie struktury; analiza MES; beton sprężony; detekcja uszkodzeń

• Wydawca: Poznan University of Technology. Institute of Applied Mechanics
• Czasopismo: Vibrations in Physical Systems
• Rocznik: 2008
• Tom: Vol. 23
• Strony: 441--446
• Opis fizyczny: Bibliogr. 7 poz., il., wykr.

Twórcy

autor

Zielnica J.

• Poznan University of Technology, Institute of Applied Mechanics, ul.Piotrowo 3, 60-965 Poznań, Poland

autor

Barczewski R.

• Poznan University of Technology, Institute of Applied Mechanics, ul.Piotrowo 3, 60-965 Poznań, Poland

Bibliografia

• 1. Barczewski R., Application of the Short Time Fourier Transform (STFT) with AFC Correction to Nonlinear System Free Vibration Signal Analysis, XIX th Symposium Vibration in Physical Systems, Poznań-Błażejewko, May 22-25.2000.
• 2. Barczewski R., Stress assessment and integrity loss detection of a concrete beam on the basis of backbone curve changes analysis, Proceedings Workshop of COST on NTD Assessment and New Systems in prestressed concrete Structures, NRI Radom -2005, pp.182-187
• 3. Barczewski R., Short time Rice frequency analysis (STRFA) a method of the time variant vibration signals analysis, XXII Symp. - Vibrations In Physical Systems - Poznań-Będlewo 2006
• 4. Barczewski R., Condition assessment of prestressed concrete structures based on the vibroacoustic signal analysis, Proceedings of the International Symposium Trends in Continuum Physics TRECOP’07 Lviv/ Briukhovichi, Ukraine 16-20, September 2007.
• 5. Kaźmierczak H., Kromulski J., Cempel C., Barczewski R., “Energetic description of the destruction process of steel concrete structures”, COST Action 534 New Materials and Systems for Prestressed Concrete Structures, Workshop of COST on NTD Assessment and New Systems in Prestressed Concrete Structures, Radom.
• 6. Dobry M. W. „Metoda diagnostyki energetycznej w zastosowaniu do rozpoznawania stanu technicznego i obciążenia belek żelbetowych”, Diagnostyka Vol. 36 2005 r. Wyd. Polskie Towarzystwo Diagnostyki Technicznej, Uniwersytet Warmińsko – Mazurski w Olsztynie, Olsztyn, pp. 39-44
• 7. Zielnica J., Barczewski R., Sensitivity analysis of modal frequency shift caused by beam condition change using the FEM simulation New methods for assessment and monitoring of prestressed concrete structures - END PRODUCT of the COST 534 Action, Part III New materials, systems, methods and concepts for durable prestressed concrete structures (in press).