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Column tests of dodecagonal section double skin concrete-filled steel tubes
Affiliation:1. Department of Mechanical Engineering and Construction, Universitat Jaume I, Castellón, Spain;2. Instituto de Ciencia y Tecnología del Hormigón (ICITECH), Universitat Politècnica de València, Valencia, Spain;1. The School of Civil, Environmental and Mining Engineering, Faculty of engineering, Computing and Mathematics, The University of Western Australia, Australia;2. School of Engineering and Mathematical Sciences, La Trobe University, Bendigo, VIC 3552, Australia;3. Department of Structural Engineering, Faculty of Engineering, Tanta University, Tanta, Egypt;4. School of Civil Engineering and Built Environment, Science and Engineering Faculty, Queensland University of Technology (QUT), Australia;5. Chongqing University, Ministry of Education, Chongqing 400045, China;1. State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China;2. Department of Civil Engineering, School of Mathematics, Computer Science & Engineering, City University of London, Northampton Square, London, UK;3. School of Engineering, University of Bradford, Bradford, West Yorkshire, BD7 1DP, UK
Abstract:A series of tests on dodecagonal section double skin concrete-filled steel columns (DCS) were carried out in this study. Column specimens having different lengths ranged from 1000 mm to 3500 mm were tested. The behavior and strengths of dodecagonal section double skin concrete-filled steel columns were investigated. In addition, local bucking of inner and outer steel tubes were also investigated. Material properties of the concrete and steel used in the test specimens were measured. The test strengths are compared with the design strengths calculated using the proposed methods based on current AISC Specification and Eurocode for the design of composite structural members. The suitability of design method proposed by other researcher for circular section double skin concrete-filled steel columns for dodecagonal section specimens was also evaluated.
Keywords:Column test  Concrete-filled steel tubes  Dodecagonal section  Double skin  Local buckling
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