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Flexural behavior and design of rectangular ultra-high performance concrete-filled high-strength steel tube members
Highlights Experimentally and numerically investigates the flexural behavior of rectangular CuFTh members. Identifies the influence of high-strength materials on the strength, stiffness, and ductility of rectangular CuFTh members. Evaluates the applicability of current design codes for estimating the strength and stiffness of rectangular CuFTh members.
Abstract This study investigated the flexural behavior of rectangular ultra-high performance concrete-filled high-strength steel tube (CuFTh) members. A total of 11 tests were conducted. The influence of yield stress of steel (Fy), steel fiber volume content of UHPC (ρ), height (H) of steel tube, and thickness of steel tube wall (t) was investigated. 3D finite-element models were developed and benchmarked to conduct parametric studies. Results from the experimental tests and FEM analyses indicated that: (i) Fy, t, and H have a significant influence on the flexural strength, while the compressive strength of concrete has a negligible impact; and (ii) increasing ρ slightly improves the flexural strength, but obviously reduces the ductility. Additionally, results from the experimental tests and FEM analyses were compared with the strength estimated using AISC 360-16, GB 50936-2014, Eurocode 4, and AIJ. The comparisons showed that Eurocode 4 and AISC 360-16 can reasonably estimate the flexural strength of rectangular CuFTh members. AIJ is recommended for predicting the service-level flexural stiffness of rectangular CuFTh members.
Flexural behavior and design of rectangular ultra-high performance concrete-filled high-strength steel tube members
Highlights Experimentally and numerically investigates the flexural behavior of rectangular CuFTh members. Identifies the influence of high-strength materials on the strength, stiffness, and ductility of rectangular CuFTh members. Evaluates the applicability of current design codes for estimating the strength and stiffness of rectangular CuFTh members.
Abstract This study investigated the flexural behavior of rectangular ultra-high performance concrete-filled high-strength steel tube (CuFTh) members. A total of 11 tests were conducted. The influence of yield stress of steel (Fy), steel fiber volume content of UHPC (ρ), height (H) of steel tube, and thickness of steel tube wall (t) was investigated. 3D finite-element models were developed and benchmarked to conduct parametric studies. Results from the experimental tests and FEM analyses indicated that: (i) Fy, t, and H have a significant influence on the flexural strength, while the compressive strength of concrete has a negligible impact; and (ii) increasing ρ slightly improves the flexural strength, but obviously reduces the ductility. Additionally, results from the experimental tests and FEM analyses were compared with the strength estimated using AISC 360-16, GB 50936-2014, Eurocode 4, and AIJ. The comparisons showed that Eurocode 4 and AISC 360-16 can reasonably estimate the flexural strength of rectangular CuFTh members. AIJ is recommended for predicting the service-level flexural stiffness of rectangular CuFTh members.
Flexural behavior and design of rectangular ultra-high performance concrete-filled high-strength steel tube members
Lai, Zhichao (Autor:in) / Zhou, Weisheng (Autor:in) / Wang, Ying (Autor:in) / Huang, Peijia (Autor:in) / Zhang, Chao (Autor:in)
Engineering Structures ; 286
05.04.2023
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Flexural behavior of high strength concrete filled high strength square steel tube
| Online Contents | 2017