Advanced Steel Construction

Vol. 11, No. 1, pp. 111-126 (2015)


SUB-FRAMES WITH REVERSE CHANNEL CONNECTIONS TO CFT COMPOSITE COLUMNS –EXPERIMENTAL EVALUATION

 

Fernanda Lopes1, Aldina Santiago1,*, Luís Simões da Silva1, Naveed Iqbal2, Milan Veljkovic2 and José Guilherme S. da Silva3

1 ISISE - Department of Civil Engineering, University of Coimbra, Pólo II, 3030 Coimbra, Portugal

2 Division of Structural and Construction Engineering of the Luleå University of Technology, Luleå, Sweden

3 Department of Structural Engineering of the State University of Rio de Janeiro, Rio de Janeiro, Brazil

*(Corresponding author: E-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.)

 

Received: 19 March 2014; Revised: 23 April 2014; Accepted: 5 May 2014

 DOI: 10.18057/IJASC.2015.11.1.7

 

ABSTRACT:

This paper presents the experimental results of the investigation on the coupled joint-structure behaviour of the composite sub-frame, using the reverse channel connections between an I-beam and the concrete filled tube (CFT) columns. This experimental programme includes seven full-scale tests: three tests at ambient temperature and four tests under heating-cooling curves. The parametric study was dedicated to: temperature-time curve and channel wall thickness (8, 10 and 12 mm). The main objective of these tests is to provide experimental information on the behaviour of the reverse channel joints and its influence on the structure under a heating-cooling fire. The restraining effects from the unaffected part of surrounding structure induce highly variable loading histories on the joints during fire; therefore the investigation on coupled joint-structure behaviour should lead to a realistic prediction of progressive collapse of the structure.

 

Keywords: Full-scale tests, Heating-cooling curves, Reverse channel connection, Concrete filled tubes, Robustness.

 

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