Stiffness assessment of bolted beam-to-tubular column joints through modal data

  1. Miguel A. Serrano-Lopez 1
  2. Marta García-Diéguez 1
  3. Jose L. Zapico-Valle 1
  4. Carlos Lopez-Colina 1
  5. Miguel Lozano 1
  1. 1 Universidad de Oviedo
    info

    Universidad de Oviedo

    Oviedo, España

    ROR https://ror.org/006gksa02

Actas:
Proceedings of the 17th International Symposium on Tubular Structures (ISTS17)

Editorial: National University of Singapur

ISBN: 978-981-11-0745-0

Año de publicación: 2019

Páginas: 619-626

Congreso: 17th International Symposium on Tubular Structures (ISTS17)

Tipo: Aportación congreso

DOI: 10.3850/978-981-11-0745-0_015-CD GOOGLE SCHOLAR

Resumen

Although beam-to-tubular column joints are mostly welded instead of bolted because the difficulty to access to the inside of tubes, the use of threaded studs welded to the tube front face of rectangular hollow sections could avoid this problem and allows removable joints to be used. An important issue of these connections is the characterization of their rotational stiffness. A research on bolted I beam-to-tubular column joints using welded threaded studs, which proposes a new methodology to obtain the joint stiffness from modal data, is presented in this paper. The studied joints include angle cleats connected to the beam flanges with standard bolts and to the column face with welded threaded studs. A simplified finite element model comprising beam elements has been developed to reproduce the dynamic behavior of this kind of connections. The model is updated by minimizing the discrepancies between the analytical and experimental natural frequencies. The experimental frequencies were obtained through modal impact tests. The initial rotational stiffness, which is an essential parameter to characterize semi-rigid joints, can be easily obtained from the updated model. On the experimental side, the proposed procedure just needs a portable analyzer and an accelerometer. The goodness of the model has been validated with experimental monotonic tests and results are really promising.

€ Ver financiación

Información de financiación

The authors would like to acknowledge the Spanish Ministry of Economy and Competitiveness for their financial support under Project BIA2017-83467-P and the CIDECT for their support under project 5CF.

Financiadores

Referencias bibliográficas

  • CEN, EN-1993-1-8:2005. Eurocode 3: Design of steel structures. Part 1-8: Design of Joints. European Committee for Standardization. 2005.
  • Edkhout, M., Tubular Structures in Architecture, CIDECT, Geneva and TU Delft, 2011.
  • Kurobane, Y., Packer, J.A., Wardenier, J., Yeomans, N. Design guide for structural hollow sections column connections. CIDECT, TÜV-Verlag GmbH, Köln, 2004.
  • Serrano, M. A., López-Colina, C., Wang, Y.C., Lozano, M. and Gayarre, F.L., Comparative behaviour of ‘I beam- RHS column’ joints with and without web weld, J. Constr. Steel Res., 159, 330-340, 2019.
  • Serrano, M. A., López-Colina, C., Wang, Y.C., Lozano, M. and Gayarre, F.L., I beam-RHS column joints with welded studs, Proceedings of the 9th Intnl. Conf. on Steel and Alum. Struct., Badford, July 3-5, 2019.
  • Türker, T., Kartal, M.E., Bayraktar, A., Muvafik, M., Assessment of semi-rigid connections in steel structures by modal testing, Journal of Constructional Steel Research 65(7), 1538-1547, 2009.
  • Wardenier, J., Packer, J.A., Zhao, X.L. and van der Vegte, G.J., Hollow sections in structural applications. 2nd ed. CIDECT, Geneva, 2010.
  • Zapico-Valle, J.L., Abad-Blasco, J., González-Martínez, M.P., Franco-Gimeno, J.M. and García-Diéguez, M., Modelling and calibration of a beam-column joint based on modal data, Computers and Structures 108-109, 31-41, 2012.
  • Zapico-Valle, J.L., Alonso-Camblor, R., González-Martínez, M.P. and García-Diéguez, M., A new method for finite element model updating in structural dynamics, Mechanical Systems and Signal Processing 24(7), 2137-2159, 2010.