Lap joints stiffness according to Eurocode EC3 and experimental investigations results

• Autorzy: Wuwer W. , Zamorowski J. , Swierczyna S.
• Języki publikacji: EN

Abstrakty

EN

Axial forces F in the lap joints connections are responsible for mutual displacements δ of connected walls (F=Kδ×δ), and bending moments M—their mutual rotations about angle φ (M=Sj×φ). Basing on formulae provided in EC3 concerning the coefficients of stiffness of the basic joint components, analogical formulae have been derived for sliding lap joints (Kδ) and rotary lap joints (Sj). Results achieved from stiffness formulae for various types of lap joints are compared with the experimental results of known models presented in literature. Our experimental results of single-cut joints made of blind-bolts of the type BOM R16 for cold-formed sections are also presented. Elements with those connections are simultaneously tested for bending and shear. Experimental investigations ended with the paths of static equilibrium (PSE) illustrated by M–φ diagrams and compared with three-segmental broken curves achieved from formulae proposal mentioned above. It can be stated the lap joints stiffness described by the three-segmental broken curves are accurate for the real behavior of discussed connections. Results of each experimental investigations are characterized with higher and lower dispersion. The broken curves situated under the paths of static equilibrium (PSE) are safe and reflect in satisfying way the behavior of bar structures with investigated joints.

Słowa kluczowe

EN

flexibility of shifting and rotary; joints; models of lap joints; initial stiffness; secant stiffness; experimental investigations

PL

złącze; modele stawów biodrowych; badania eksperymentalne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2012
• Tom: Vol. 12, no. 1
• Strony: 95--104
• Opis fizyczny: Bibliogr. 10 poz., rys., tab., wykr.

Twórcy

autor

Wuwer W.

• Silesian University of Technology, Faculty of Civil Engineering, 2A Akademicka Street, 44-100 Gliwice, Poland

autor

Zamorowski J.

• Silesian University of Technology, Faculty of Civil Engineering, 2A Akademicka Street, 44-100 Gliwice, Poland

autor

Swierczyna S.

• Silesian University of Technology, Faculty of Civil Engineering, 2A Akademicka Street, 44-100 Gliwice, Poland

Bibliografia

• [1] PN-EN 1993-1-8 Eurocode 3, Design of steel structures Part 1-8, Design of Joints.
• [2] C. Pietrapertosa, E. Pirapez, J.P. Jaspart, Ductility requirements in shear bolted connections, in: Proceedings of the Connections in Steel Structures V, Amsterdam, 2004.
• [3] G. Gedomet, L. Horvath, J.-P. Muzea, Analysis of beam splices with reduced number of cover plates, in: Proceedings of the 4th European Conference on Steel and Composite Structures, Maastricht, 2005.
• [4] J.A. Karczewski, S. Wierzbicki, J. Witkowski, Numerical analysis and experimental study of compressed, cover plate screw connections, in: Proceedings of the VIII Konferencja Naukowa Połą̨czenia i Wezły w Konstrukcjach Metalowych, Olsztyn, Łańsk, 2003 (in Polish).
• [5] W. Wuwer, The behaviour and design of lap-joints in thin-walled bar constructions, Advanced Steel Construcion an International Journal 4 (1) (2008) 59–83.
• [6] W. Wuwer, Flexible joints with blind bolts in thin-walled bar constructions, Zeszyty Naukowe Politechniki Sląskiej 1710 (105) (2006) (in Polish).
• [7] S. Swierczyna, W. Wuwer, Journal friction in bolted lap joints in a complex state of load, Zeszyty Naukowe Politechniki Rzeszowskiej, Seria: Budownictwo i Inzynieria Srodowiska 50 (2010) 353–362 (in Polish).
• [8] Recommendations for Steel Construction, ECCS-TC7, The Design and Testing of Connections in Steel Sheeting and Sections, Constrado, no. 21, 1990.
• [9] K. Weynand, J.P. Jaspart, M. Steenhuis, The stiffness of revised Annex J of Eurocode 3, in: A. Colson, R. Zandonini (Eds.), Connections in Steel Structures III, Pergamon, Oxford, 1996, pp. 441–452.
• [10] J. Zamorowski, An assessment of the possibility to analyze latticed towers with joints of curbs susceptible to shifts, in: Proceedings of the Jubilee International Scientific Conference VSU’2008, Sofia, 2008.