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- W3143803072 endingPage "112193" @default.
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- W3143803072 abstract "Concrete-filled-steel-tube (CFST) and double-skinned concrete-filled-steel-tube (DSCFST) columns have superior strength, stiffness and ductility to that of traditional reinforced concrete columns. Despite the above merits, a major issue with these columns is that the steel-concrete interface bonding will be impaired by the concrete shrinkage and different lateral dilation of steel and concrete under compression. To mitigate the problem, the use of expansive concrete is proposed in this study. For verification, a total of 10 CFST and DSCFST stub columns containing ordinary or expansive concrete were fabricated and tested under uni-axial compression. The studying parameters are: (1) Replacement level of cement by expansive agent (0 or 20% by weight); (2) Steel tube dimensions; (3) Hollow section ratio of DSCFST columns. From the test results, some pre-loading confining stress was measured in both axial and hoop directions in specimens containing expansive concrete. It also revealed that using expansive agent could enhance the elastic modulus, yield and ultimate strengths of CFST and DSCFST columns. Lastly, the yield and ultimate strengths of these columns were compared with the design strength predicted by EC4, ACI and AISC, in which their applicability on CFST and DSCFST columns containing expansive concrete was investigated." @default.
- W3143803072 created "2021-04-13" @default.
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- W3143803072 date "2021-06-01" @default.
- W3143803072 modified "2023-10-14" @default.
- W3143803072 title "Uni-axial behaviour of expansive CFST and DSCFST stub columns" @default.
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- W3143803072 doi "https://doi.org/10.1016/j.engstruct.2021.112193" @default.
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