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Steel and Composite Structures Volume 20, Number 5, April10 2016 , pages 1067-1085 DOI: https://doi.org/10.12989/scs.2016.20.5.1067 |
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Experimental and analytical behaviour of cogged bars within concrete filled circular tubes |
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Tilak Pokharel, Huang Yao, Helen M. Goldsworthy and Emad F. Gad
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| Abstract | ||
| Recent research on steel moment-resisting connection between steel beams and concrete filled steel tubes has shown that there are considerable advantages to be obtained by anchoring the connection to the concrete infill within the tube using anchors in blind bolts. In the research reported here, extensive experimental tests and numerical analyses have been performed to study the anchorage behaviour of cogged deformed reinforcing bars within concrete filled circular steel tubes. This data in essential knowledge for the design of the steel connections that use anchored blind bolts, both for strength and stiffness. A series of pull-out tests were conducted using steel tubes with different diameter to thickness ratios under monotonic and cyclic loading. Both hoop strains and longitudinal strains in the tubes were measured together with applied load and slip. Various lead-in lengths before the bend and length of tailed extension after the bend were examined. These dimensions were limited by the dimensions of the steel tube and did not meet the requirements for | ||
| Key Words | ||
| anchorage; cogged bar; blind-bolt; concrete filled steel tube; finite element analysis | ||
| Address | ||
| (1) Tilak Pokharel, Huang Yao, Helen M. Goldsworthy: Infrastructure Department, University of Melbourne, Parkville, VIC 3010, Australia; (2) Emad F. Gad: Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia. | ||