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PROCEEDINGS OF THE TENTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY
Edited by: B.H.V. Topping, J.M. Adam, F.J. Pallarés, R. Bru and M.L. Romero
Assessment of the Resistance of Steel K-joints between Rectangular Hollow Sections with Galvanizing Holes using the Finite Element Method
J.J. Del Coz Diaz, C. López-Colina Pérez, M.A. Serrano López and F.P. Álvarez Rabanal
Construction and Manufacturing Engineering Department, University of Oviedo, Gijón, Spain
J.J. Del Coz Diaz, C. López-Colina Pérez, M.A. Serrano López, F.P. Álvarez Rabanal, "Assessment of the Resistance of Steel K-joints between Rectangular Hollow Sections with Galvanizing Holes using the Finite Element Method", in B.H.V. Topping, J.M. Adam, F.J. Pallarés, R. Bru, M.L. Romero, (Editors), "Proceedings of the Tenth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 146, 2010. doi:10.4203/ccp.93.146
Keywords: finite element analysis, nonlinear analysis, nonlinear buckling, plasticity, large displacements.
The process of hot-dip galvanizing of trusses requires some holes in brace members in order to allow the immersion of the structure into the zinc bath. These holes are usually executed near connections for the recovery of the higher amount of liquid, and this practice could have an influence on the ultimate strength of the joint and this point must be evaluated to avoid any non-conservative result that could be obtained by simply applying the formulae from the design codes . In another previous research project  the structural assessment was not considered, therefore, this important subject was left for further research using numerical and experimental methods. In this way, the joint behaviour of hot-dip galvanized tubular trusses is an interesting issue to be studied due to the uncertainty caused by the holes required for the galvanizing process.
In this work, a new and innovative procedure, based on the design of experiments (DOE) using the finite element method, is used in order to study the ultimate resistance of a wide steel K-joint' types [3,4], evaluating the effect on the performance of the hollow section joints with and without holes.
The validation of the finite element model was also carried out using twenty-two experimental tests, and a good agreement has been obtained. From the numerical and experimental results, the following facts can be addressed:
Finally, from this research work it will be possible to design these types of joints in a safe way, and with this basis it is possible to include as a design standard the size and location of the galvanizing holes, as stated in the Project CIDET .
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