Abstract
Finite element method and fiber model method were used to calculate the load-carrying capacity of the specimens. Based on the experimental and theoretical analysis, simplified calculation method of the load-carrying capacity for this kind of member is proposed. It indicates that finite element method result is relatively small, fiber model method result accords well with the experimental result. Circular reinforced concrete members covered with steel tube presents both the characteristics of reinforced concrete and concrete filled steel tube member, showing higher load-carrying capacity and greater deformability. The load-carrying capacity of circular reinforced concrete members covered with steel tube can be calculated by the means of the method of reinforced concrete member with confined concrete. The result predicted by the simplified method is in good agreement with the experimental result.
Highlights
Fiber model methodThe fiber model method can accurately simulate the process from loading to failure of reinforced concrete members and concrete-filled steel tubular members, and the key is to reasonably determine the constitutive relations of each material
Finite element method and fiber model method were used to calculate the load-carrying capacity of the specimens
The fiber model method can accurately simulate the process from loading to failure of reinforced concrete members and concrete-filled steel tubular members, and the key is to reasonably determine the constitutive relations of each material
Summary
The fiber model method can accurately simulate the process from loading to failure of reinforced concrete members and concrete-filled steel tubular members, and the key is to reasonably determine the constitutive relations of each material. The steel adopts the stress-strain relationship expressed in the following formula, as shown in FIG. Where, s is steel stress; Es is the elastic modulus of steel, take 206000MPa; s is steel strain; is the strain corresponding to the limit of steel proportion,. The stress-strain relationship of rebar adopts the linearcomplete plastic model [8], as shown in FIG. Where, s is the reinforcement strain; y is the yield strain of reinforcement, y f y / Es ; Es is the elastic modulus of the steel bar, which is 200000MPa. The stress-strain relationship model of circular concretefilled steel tube core concrete in literature [7] is adopted for concrete, as shown in FIG. The stress-strain relationship model of circular concretefilled steel tube core concrete in literature [7] is adopted for concrete, as shown in FIG. 5(c), namely:
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
