期刊
ENGINEERING STRUCTURES
卷 289, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.engstruct.2023.116258
关键词
Engineered Cementitious Composite; Concrete filled steel tubes; Fire exposure; Eccentric load; Theoretical model
This paper investigates the mechanical behaviors of ECC-encased CFST columns after fire exposure with different parameters. The concrete-encased CFST column experiences severe concrete spalling, while the ECC-encased CFST column maintains its integrity under identical fire conditions. The ECC-encased CFST column shows higher eccentric load carrying capacity and flexural stiffness compared to the concrete-encased CFST column.
This paper intends to investigate the mechanical behaviors of eccentrically loaded engineered cementitious composite (ECC)-encased concrete filled steel tube (CFST) columns after fire exposure. Totally seven ECC-encased CFST columns and one concrete-encased CFST column were designed and tested with the consider-ation of different parameters, i.e., heating-up time, eccentricity ratio, stirrup spacing and longitudinal rein-forcement ratio. It was found that the severe concrete spalling was noticed for concrete-encased CFST column, while the integrity of ECC-encased CFST column was well maintained under identical fire-exposed circum-stances. After fire exposure for 45 min, the eccentric load carrying capacity and flexural stiffness of ECC-encased CFST column are 57.8 % and 63.5% higher than that of concrete-encased CFST column, respectively. A theo-retical model was proposed to predict the residual eccentric load strength of ECC-encased CFST columns after fire exposure, and the maximum error of the calculation result was within 12 %.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据