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Finite Element Model Calibration of a Historic Wiegmann–Polonceau Truss Based on Experimental Modal Parameters

  • This paper describes the experimental calibration of an existing Wiegmann–Polonceau roof truss based on modal parameters. Dynamic tests allowed the determination of the natural frequencies and mode shapes of the global truss and of individual truss members. The global and local modal configurations as well as coupled vibration of truss members are discussed. In addition, as truss members are axially loaded, the effect of stress stiffening on the modal parameters is considered. Moreover, several finite element models with different modelling assumptions for the details of the connections and member geometrical characteristics such as gusset plates and turnbuckles were developed. A suitable numerical model was chosen to represent the truss structural behavior. This paper focuses on the local measurement and analysis strategies applied to single truss members. The possibility of using a local analysis method, namely methods that consider individual members as part of a structure, is demonstrated to assess the behavior of the global trussThis paper describes the experimental calibration of an existing Wiegmann–Polonceau roof truss based on modal parameters. Dynamic tests allowed the determination of the natural frequencies and mode shapes of the global truss and of individual truss members. The global and local modal configurations as well as coupled vibration of truss members are discussed. In addition, as truss members are axially loaded, the effect of stress stiffening on the modal parameters is considered. Moreover, several finite element models with different modelling assumptions for the details of the connections and member geometrical characteristics such as gusset plates and turnbuckles were developed. A suitable numerical model was chosen to represent the truss structural behavior. This paper focuses on the local measurement and analysis strategies applied to single truss members. The possibility of using a local analysis method, namely methods that consider individual members as part of a structure, is demonstrated to assess the behavior of the global truss structure. The comparison of the results after calibration reveals a very good correlation between the experimentally identified and numerically estimated modal parameters of the historic truss.show moreshow less

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Metadaten
Author: Thi Mai Hoa Luong, Werner LorenzGND, Rolf G. Rohrmann, Volkmar Zabel, Samir Said
DOI:https://doi.org/10.1007/978-3-319-67443-8_18
ISBN:978-3-319-67443-8
Title of the source (English):Experimental Vibration Analysis for Civil Structures: Testing, Sensing, Monitoring, and Control
Publisher:Springer International Publishing
Place of publication:Cham
Document Type:Part of a book (chapter)
Language:English
Year of publication:2017
Tag:Coupled vibration; Finite element model calibration; Historic truss structures; Modal analysis; Stress stiffening
First Page:212
Last Page:224
Series ; volume number:Lecture notes in civil engineering ; 5
Faculty/Chair:Fakultät 6 Architektur, Bauingenieurwesen und Stadtplanung / FG Bautechnikgeschichte
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