Experimental and analytical study on the behaviour of circular concrete filled steel tubes in cyclic bending

被引：9

作者：

Montuori, Rosario ^{[2
]}

Nastri, Elide ^{[1
]}

Piluso, Vincenzo ^{[1
]}

Todisco, Paolo ^{[1
]}

机构：

[1] Univ Salerno, Dept Civil Engn, Fisciano, SA, Italy

[2] Univ Salerno, Dept Pharm, Fisciano, SA, Italy

来源：

ENGINEERING STRUCTURES | 2024年 / 304卷

关键词：

CFTs; Steel; Concrete; Numerical model; Experimental; STRESS-STRAIN MODEL; TUBULAR COLUMNS; STUB COLUMNS; PERFORMANCE; STRENGTH;

D O I：

10.1016/j.engstruct.2024.117610

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

In the present study, a comprehensive experimental investigation is conducted on eight Concrete-Filled Tube (CFT) specimens subjected to bending loads under cyclic conditions. The loading regimes included constant and variable amplitude cycles. Strain was precisely measured using strategically placed gauges, and the data generated load-displacement and moment-curvature curves. A novel analytical model is developed and calibrated to match the experimental outcomes; this model incorporates the Mander stress-strain relationship for confined concrete and the Ramberg-Osgood model for steel. The study provides new insights into the mechanical behaviour of CFTs under bending, particularly in terms of strain distribution, load-displacement characteristics, and failure modes. This research serves as a strong foundation for future finite element modelling and design optimization of CFT structures, enhancing their safe and efficient use in engineering applications.

引用

页数：16

共 40 条

[1] Effect of different cross-sections and concrete types on the flexural behavior of CFSTs [J].