TY - JOUR
T1 - Effect of ultra-high strength steel on mitigation of non-ductile yielding of concrete-filled double-skin columns
AU - Farahi, Mojtaba
AU - Heidarpour, Amin
AU - Zhao, Xiao-Ling
AU - Al-Mahaidi, Riadh
PY - 2017/8/30
Y1 - 2017/8/30
N2 - Concrete-filled tubular (CFT) sections, and the most recent configuration of these sections, concrete-filled double-skin tubular (CFDST) sections, can provide high strength in structural construction. In this study, an innovative fabrication strategy is proposed to prohibit the non-ductile yielding of CFDST sections by applying ultra-high strength steel corner steel tubes. Hence, the static compressive behaviour of CFDST columns containing ultra-high strength steel tubes is experimentally investigated. The results are then compared with those for the same experiment conducted on a CFDST specimen with corner mild steel tubes. In addition, a numerical investigation is conducted to examine the effect of different parameters on promoting the ductility and compressive strength. In order to pave the way for utilizing CFDSTs with corner tubes in engineering practice, a simple analytical formulation is also proposed to predict the load-displacement relationship of these sections based on the experimental and numerical results.
AB - Concrete-filled tubular (CFT) sections, and the most recent configuration of these sections, concrete-filled double-skin tubular (CFDST) sections, can provide high strength in structural construction. In this study, an innovative fabrication strategy is proposed to prohibit the non-ductile yielding of CFDST sections by applying ultra-high strength steel corner steel tubes. Hence, the static compressive behaviour of CFDST columns containing ultra-high strength steel tubes is experimentally investigated. The results are then compared with those for the same experiment conducted on a CFDST specimen with corner mild steel tubes. In addition, a numerical investigation is conducted to examine the effect of different parameters on promoting the ductility and compressive strength. In order to pave the way for utilizing CFDSTs with corner tubes in engineering practice, a simple analytical formulation is also proposed to predict the load-displacement relationship of these sections based on the experimental and numerical results.
KW - Analytical formulation
KW - Composite columns
KW - Compressive behaviour
KW - Concrete-filled double-skin sections
KW - Ultra-high strength tubes
UR - http://www.scopus.com/inward/record.url?scp=85018438430&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2017.04.189
DO - 10.1016/j.conbuildmat.2017.04.189
M3 - Article
AN - SCOPUS:85018438430
SN - 0950-0618
VL - 147
SP - 736
EP - 749
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -