TY - CHAP A1 - Luong, Thi Mai Hoa A1 - Lorenz, W. A1 - Rohrmann, R.G. A1 - Zabel, V. A1 - Said, Samir ED - Springer, Cham, T1 - Finite Element Model Calibration of a Historic Wiegmann–Polonceau Truss Based on Experimental Modal Parameters N2 - 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 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. KW - Modal parameters KW - Axial force KW - Dynamic test KW - Finite element method KW - Truss structures PY - 2017 SN - 978-3-319-67443-8 DO - https://doi.org/10.1007/978-3-319-67443-8_18 SN - 2366-2557 VL - 5 SP - 212 EP - 224 PB - Springer International Publishing ET - 1 AN - OPUS4-42524 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Luong, Thi Mai Hoa T1 - Non-destructive assessment of the actual state of stress in existing truss structures by vibration measurements N2 - Based on the state-of-the-art research and advances in dynamic testing methods in the past decades, the research project aims to develop a non-destructive methodology to determine the axial forces and real stress state in existing truss structures making use of the vibration signatures of the natural frequencies and mode shapes. Furthermore, it aims to estimate the joint rigidity of trusses as well as to design structural health monitoring schemes for the safety of existing truss-type structures. T2 - Young Engineers Colloqium 2017 (YEC2017) CY - Bochum, Germany DA - 31.03.2017 KW - Steel KW - Truss structures KW - Axial force KW - Stress state KW - Vibration behaviour KW - Dynamic test KW - Modal parameters KW - Finite element method KW - Model updating KW - Optimization technique PY - 2017 AN - OPUS4-40288 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -