Experimental study of CFST column to steel beam bolted connection with curved end-plates

Author:

Mudrov Andrej1,Šapalas Antanas1,Šaučiuvėnas Gintas1

Affiliation:

1. Department of Steel and Composite Structures, Vilnius Gediminas Technical University, Vilnius, Lithuania

Abstract

This paper presents results of experimental study of a bolted column-beam connection with an extended curved end-plate joining steel beam and a hollow core Concrete-Filled Steel Tube (CFST). Column concrete hollow core was formed by centrifugal casting process that allowed decreasing porosity, increasing homogeneity and strength of the concrete. It was expected that strength and stiffness of the joint would be significantly affected by spalling of the concrete core due to transverse action, which would limit rotation of the joint and bearing capacity of the column. However, the concrete hollow core had no prominent signs of fracture – bending strength of the joint was determined by punching shear of the steel tube wall. Further result analysis has shown that, in reference to Eurocode 3, the joint may be classified as semi-rigid and that non-uniform initial contact between the end-plates and the column can reduce stiffness of the joint. In addition to this, it has been found that the analytical Eurocode component method is in close agreement with the attained test results, but its feasibility should be validated against additional tests with other failure modes.

Publisher

Vilnius Gediminas Technical University

Reference12 articles.

1. Alostaz, Y.M., & Schneider, S.P. (1996). Connections to concrete-filled steel tubes. University of Illinois Engineering Experiment Station. College of Engineering. University of Illinois at Urbana-Champaign.

2. Barnett, T., Tizani, W., & Nethercot, D.A. (2000). Blind bolted moment resisting connections to structural hollow sections. InConference Connections in Steel Structures IV: Steel Connections in the New Millennium. Roanoke, Virginia, USA.

3. DEVELOPMENT OF CONNECTIONS TO CONCRETE-FILLED RECTANGULAR TUBULAR COLUMNS

4. European Committee for Standardization. (2005). Eurocode 3: Design of steel structures – Part 1–8: Design of joints (EN 1993-1- 8:2005/AC:2009).

5. THE QUASI-DUCTILE RESISTANCE OF COMPRESSED SPUN CONCRETE BEAM‐COLUMNS

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