STRESS AND STRAIN CONCENTRATIONS IN STEEL ANGLE TENSION MEMBERS CONNECTED BY ONE LEG

The paper presents the numerical simulations results of net section failure in tensioned angles. Angles are made of structural steel with nominal grade S235. Simulation takes into account ductile fracture initiation, by application of Gurson-Tvergaard-Needleman (GTN) material model. Parametrical analysis of ultimate resistance was carried out. The finite elements analyses were conducted by ABAQUS computer program. Shear lag effect in considered joint was observed, as a non uniform tensile stress distribution in angles in the vicinity of a connection. Stress concentration areas and stress concentration factors have been predicted, both in elastic and ultimate behaviour of joint. Especially change of non-uniform stress distribution in net cross-section was observed, during increase of loading, until the ultimate resistance was reached.

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1. EN 1993-1-1 Eurocode 3: Design of steel structures – Part 1-1: General rules and rules for buildings. European Committee for Standardization, Brussels, 2005.
2. ANSI/AISC 360-10 An American National Standard. Specification for Structural Steel Buildings. American Institute of Steel Construction, 2010.
3. Kulak G.L., Wu Y.: Shear lag in bolted angle tension members, Journal of Structural Engineering, vol. 123(9), 1997, pp. 1144–1152.
4. Može P.: Angles connected by one leg in tension, Eurosteel 2017, September 13-15, 2017, Copenhagen, Denmark, onlinelibrary.wiley.com/doi/10.1002/cepa.433.
5. EN 1993-1-8 Eurocode 3: Design of steel structures – Part 1-8: Design of joints, European Committee for Standardization, Brussels, 2005.
6. Błyskal E., Ślęczka L.: Experimental tests of angle tension members connected by one bolt (in Polish), Czasopismo Inżynierii Lądowej, Środowiska i Architektury – Journal of Civil Engineering, Environment and Architecture, JCEEA; t. XXXIII, z. 63 (1/I/16), 2016, pp. 323–330, DOI:10.7862/rb.2016.38.
7. Bernatowska E., Ślęczka L.: Net section fracture assessment of steel bolted joints with shear lag effect. 64 Konferencja Naukowa KILiW PAN oraz KN PZITB, Krynica 2018 (paper accepted for publication).
8. Kossakowski P.: Application of damage mechanics in the analysis of pre-failure states of metal structures (in Polish), Zeszyty Naukowe Politechniki Rzeszowskiej Budownictwo i Inżynieria Środowiska, no. 59 (3/12/II), 2012, pp. 177–184.
9. Fang Ch., Lam A.C.C., Yam M.C.H.: Influence of shear lag on ultimate tensile capacity of angles and tees. Journal of Constructional Steel Research 84 (2013) pp. 49–61.
10. Schijve J.: Fatigue of structures and materials. Springer 2009.