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Structural behavior of UHPC filled steel tubular columns under eccentric loading
Abstract Ultra-high performance concrete filled steel tube (UHPCFST) column is an innovative and efficient structural member, especially suitable for applications requiring high load carrying capacity. This paper experimentally and numerically investigated the structural behavior of UHPCFST columns under eccentric compression, which was a continuation of the previous program regarding axially loaded members. A total of twenty specimens with circular section (CS) and square section (SS) were tested, including twelve specimens under eccentric compression and eight specimens under concentric compression as reference. The eccentric compression characteristics of UHPCFST columns were analyzed and discussed, including failure mode, load versus lateral deflection relationship, load bearing capacity and the development of bending moment and curvature. Finite element (FE) analysis was conducted to predict the behaviors of the test columns and to select a suitable numerical model for UHPC under confining pressure. Finally, the feasibility of existing design codes for predicting the load bearing capacity of UHPCFST columns under eccentric compression was evaluated.
Highlights Eccentric and concentric compression tests to investigate structural behavior of CFST columns made of ultra-high performance concrete. Analyses and discussions on eccentric compression characteristics of UHPCFSTs. FE model established to further analysis of UHPCFSTs under eccentric compression. Comparison of load bearing capacity between experimental and predicted values.
Structural behavior of UHPC filled steel tubular columns under eccentric loading
Abstract Ultra-high performance concrete filled steel tube (UHPCFST) column is an innovative and efficient structural member, especially suitable for applications requiring high load carrying capacity. This paper experimentally and numerically investigated the structural behavior of UHPCFST columns under eccentric compression, which was a continuation of the previous program regarding axially loaded members. A total of twenty specimens with circular section (CS) and square section (SS) were tested, including twelve specimens under eccentric compression and eight specimens under concentric compression as reference. The eccentric compression characteristics of UHPCFST columns were analyzed and discussed, including failure mode, load versus lateral deflection relationship, load bearing capacity and the development of bending moment and curvature. Finite element (FE) analysis was conducted to predict the behaviors of the test columns and to select a suitable numerical model for UHPC under confining pressure. Finally, the feasibility of existing design codes for predicting the load bearing capacity of UHPCFST columns under eccentric compression was evaluated.
Highlights Eccentric and concentric compression tests to investigate structural behavior of CFST columns made of ultra-high performance concrete. Analyses and discussions on eccentric compression characteristics of UHPCFSTs. FE model established to further analysis of UHPCFSTs under eccentric compression. Comparison of load bearing capacity between experimental and predicted values.
Structural behavior of UHPC filled steel tubular columns under eccentric loading
Zhang, Rui (author) / Chen, Shiming (author) / Gu, Ping (author) / Huang, Yang (author)
Thin-Walled Structures ; 156
2020-07-07
Article (Journal)
Electronic Resource
English
Concrete-filled tubular steel columns under eccentric loading
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