Research on Mechanical Properties of UHPC Encased CFSTs Under Eccentrically Compressive Loading
Year: 2024
Type: article
Abstract: Ultral-high-performance concrete (UHPC) encased concrete-filled steel tubes (CFST) have advatages such as superior durability and high bearing capacity. Four CFST columns with varying eccentricity and slenderness ratios were experimentally tested to examine their mechanical properties. Based on the test results, the failure characteristics, load-deformation responses, ultimate eccentric bearing capacity, second-order effects, and ductility were investigated. The results revealed that the incorporation of steel fibers significantly reduced the failure degree of the outer UHPC, while the inner CFST offered the column specimens good ductility. It was noted that the eccentric bearing capacity decreased markedly with the increasing eccentricity, particularly in the range of 0－80 mm. Moreover, second-order effects had a substantial impact on the eccentric bearing capacity, contributing up to 36.5% of the total moment as eccentricity and slenderness ratio increased. The study’s findings were used to discuss the applicability of existing code provisions for calculating the eccentric bearing capacity of UHPC encased CFST columns.
Source: Industrial Construction
Authors: Yuxing YANG, Feiyu LIAO, Yufeng CHEN, Jingfeng WANG, Hongming YE, Ying WANG
Language: English
Subfield: Civil and Structural Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W4405155353