A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Eccentric compression performance of UHPC-filled square stainless steel tube stub columns
Abstract To study the mechanical properties of the ultrahigh performance concrete (UHPC)-filled stainless steel tube (UFSST) with square section under eccentric compression, 9 eccentrically loaded UFSST stub columns and 3 axially loaded UFSST stub column were designed. The influence of eccentricity and steel ratio on the failure mode, load-displacement behaviour, and strain behaviour was analysed. The results indicate that the failure of the UFSST specimen under eccentric compression began with buckling at the compression side of the stainless steel tube. The typical load–displacement curve can be divided into the elastic stage, elastic-plastic stage, and plastic decline stage. The eccentric ultimate bearing capacity of the specimen gradually decreased with greater eccentricity, and appropriately increasing the steel ratio could effectively improve the eccentric bearing capacity and ductility. Parametric analysis was conducted on UFSST specimens using finite element models, including the eccentricity, UHPC strength, stainless steel yield strength, and steel ratio. Compared with design codes of GB 50936, AISC 360, and EC 4, the - curve obtained from the eccentric compression test was conservative. Thus, a prediction formula for the -curve of UFSST stub columns was proposed, and the predicted results of the proposed formula were in good agreement with the experimental results.
Highlights Proposal of a novel UFSST stub column made of UHPC and austenitic 304 stainless steel. Conducting eccentric compression tests and numerical modelling to investigate the mechanical behaviors of UFSST columns. Proposing a prediction formula for the ultimate axial force-bending moment curve.
Eccentric compression performance of UHPC-filled square stainless steel tube stub columns
Abstract To study the mechanical properties of the ultrahigh performance concrete (UHPC)-filled stainless steel tube (UFSST) with square section under eccentric compression, 9 eccentrically loaded UFSST stub columns and 3 axially loaded UFSST stub column were designed. The influence of eccentricity and steel ratio on the failure mode, load-displacement behaviour, and strain behaviour was analysed. The results indicate that the failure of the UFSST specimen under eccentric compression began with buckling at the compression side of the stainless steel tube. The typical load–displacement curve can be divided into the elastic stage, elastic-plastic stage, and plastic decline stage. The eccentric ultimate bearing capacity of the specimen gradually decreased with greater eccentricity, and appropriately increasing the steel ratio could effectively improve the eccentric bearing capacity and ductility. Parametric analysis was conducted on UFSST specimens using finite element models, including the eccentricity, UHPC strength, stainless steel yield strength, and steel ratio. Compared with design codes of GB 50936, AISC 360, and EC 4, the - curve obtained from the eccentric compression test was conservative. Thus, a prediction formula for the -curve of UFSST stub columns was proposed, and the predicted results of the proposed formula were in good agreement with the experimental results.
Highlights Proposal of a novel UFSST stub column made of UHPC and austenitic 304 stainless steel. Conducting eccentric compression tests and numerical modelling to investigate the mechanical behaviors of UFSST columns. Proposing a prediction formula for the ultimate axial force-bending moment curve.
Eccentric compression performance of UHPC-filled square stainless steel tube stub columns
Tang, Hongyuan (author) / Zou, Xue (author) / Liu, Ye (author)
2024-01-30
Article (Journal)
Electronic Resource
English