Design of circular composite beams with a different concrete core considering the effect of concrete in tension

Abstract

Currently, the bending resistance of composite steel and concrete circular beams and beam-columns may be analysed assuming the interaction between the steel shell and concrete core but ignoring the behaviour of the part of the concrete core in tension. Some natural and numerical experiments show that an influence of this part of the concrete core on the total value of bending resistance of a composite member may be rather important. Therefore, this paper pre- sents the method developed for the design of hollow and solid concrete-filled steel tubular beams based on the test data. It takes into account an effect of the part of the concrete core in tension and gives a better agreement with test results than EC4 (EN 1994-1-1 2004). Also, the paper presents the results of carried out analytical, experimental and numerical investigations of the hollow centrifuged and solid concrete-filled steel tubular beams.

Keywords:

• concrete-filled steel tubes
• beams
• effect of tension
• stress distribution
• resistance

Additional information

Notes on contributors

Audronis Kazimieras Kvedaras

Audronis Kazimieras KVEDARAS. Doctor Habil. (Dr Sc), former Professor of Department of Steel and Timber Structures of Vilnius Gediminas Technical University. Research interest: Behaviour of steel, composite steel-concrete, composite timber-concrete and structural glass structures, methods of calculation and codes. He is a member of IABSE and ASCCS, and invited NATO expert (1996, 2000).

Gintas Šaučiuvėnas

Gintas ŠAUČIUVĖNAS. Assoc. Prof. Dr, Department of Steel and Timber Structures, Vilnius Gediminas Technical University. Research interests: Evaluation of existing steel and timber structures, evaluation of fire resistance of steel and timber structures, behaviour analysis of the elements and structures made of steel, timber, glass and steel-concrete composite.

Arūnas Komka

Arūnas KOMKA. Assoc. Prof. Dr, Department of Steel and Timber Structures, Vilnius Gediminas Technical University. Research interests: analysis and design of steel, timber and composite structures.

Algirdas Juozapaitis

Algirdas JUOZAPAITIS. Dr Professor, Department of Bridges and Special Structures, Vilnius Gediminas Technical University, Research interests: Innovative Structural Systems of Steel Bridges and Special Structures, Geometrically Nonlinear Analysis and Stability of Steel Structures, Control of Internal Forces in Steel Bridges and Special Structures.