Behavior and general design method of concrete-filled high-strength steel tube (CFHST) columns

• Published in: Engineering structures Vol. 243; p. 112506
• Main Authors: Tu, Chengliang, Shi, Yongjiu, Liu, Dong, Wang, Wenhao, Ban, Huiyong
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier Ltd 15.09.2021; Elsevier BV
• Subjects: Axial stress; Bend strength; Compression; Compressive strength; Concrete; Concrete filled steel tubes; Concrete properties; Design; Design methods; Design modifications; Design techniques; Ductility; Failure modes; General model; High strength steel; High strength steels; Mathematical models; N-M interaction; Numerical models; Safety margins; Slenderness ratio; Steel; Steel columns; Steel tubes; Stress concentration; Stress distribution; Structural steels; Weight reduction; Concrete filled steel tubes; Design methods; High-strength steel; General model; N-M interaction

•High performance Q460 steel CFSTs were eccentrically loaded into large deformation.•The behavior of CFHSTs were simulated by an efficient FE model validated with 232 samples.•526 numerical simulations gave innovative insights into composite mechanism changes of CFHSTs.•N-M equations with confinemen...