Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Interaction between concrete encasement and structural steel
In the current paper the load bearing behavior and the rotation capacity of partially concrete encased composite beams made of high strength steel and concrete is investigated using a nonlinear three-dimensional finite element analysis. The finite element model is verified using the experimental results of eight full-scale beam tests. The results of the finite element simulation show different positive effects on the load bearing behavior of composite beams in the positive (sagging) and negative (hogging) moment areas. Under bending moment the encased concrete as well as the reinforcement is activated primarily by friction bond between the concrete and the steel flanges. The friction bond is mainly governed by the flexural curvature of the beam and in sagging moment areas by the lateral contraction (Poisson's effect) of the structural steel in case of tension stress. In the region of hogging moments the concrete is confined by the steel profile and the stirrup reinforcement. Thus, the sustainable concrete stresses are increased. If sufficient longitudinal shear reinforcement is provided, the concrete encasement is able to increase the capacity of the section against buckling. The performed finite element analysis gives an inside view of the interaction between concrete encasement (web encasement) and steel profile.
Interaction between concrete encasement and structural steel
In the current paper the load bearing behavior and the rotation capacity of partially concrete encased composite beams made of high strength steel and concrete is investigated using a nonlinear three-dimensional finite element analysis. The finite element model is verified using the experimental results of eight full-scale beam tests. The results of the finite element simulation show different positive effects on the load bearing behavior of composite beams in the positive (sagging) and negative (hogging) moment areas. Under bending moment the encased concrete as well as the reinforcement is activated primarily by friction bond between the concrete and the steel flanges. The friction bond is mainly governed by the flexural curvature of the beam and in sagging moment areas by the lateral contraction (Poisson's effect) of the structural steel in case of tension stress. In the region of hogging moments the concrete is confined by the steel profile and the stirrup reinforcement. Thus, the sustainable concrete stresses are increased. If sufficient longitudinal shear reinforcement is provided, the concrete encasement is able to increase the capacity of the section against buckling. The performed finite element analysis gives an inside view of the interaction between concrete encasement (web encasement) and steel profile.
Interaction between concrete encasement and structural steel
Wechselwirkung zwischen der Betonumhüllung und Baustahl
Goralski, Claus (Autor:in) / Hegger, Josef (Autor:in)
2005
8 Seiten, 7 Bilder, 1 Tabelle, 9 Quellen
Aufsatz (Konferenz)
Englisch
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