Bearing Behavior of Engineered Cementitious Composite and Ultra-High-Performance Concrete Filled-In Double Steel Tubular Composite Columns Subjected to Eccentrical Load
Liangqin Jiang,
Yigang Hong,
Jing Ji,
Yingchun Liu,
Zhanbin Zhang,
Xuan Chu,
Guiling Ma
Affiliations
Liangqin Jiang
Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, No. 99 Xuefu Street, High-Tech Industrial Development Zone, Daqing 163319, China
Yigang Hong
Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, No. 99 Xuefu Street, High-Tech Industrial Development Zone, Daqing 163319, China
Jing Ji
Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, No. 99 Xuefu Street, High-Tech Industrial Development Zone, Daqing 163319, China
Yingchun Liu
Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, No. 99 Xuefu Street, High-Tech Industrial Development Zone, Daqing 163319, China
Zhanbin Zhang
Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, No. 99 Xuefu Street, High-Tech Industrial Development Zone, Daqing 163319, China
Xuan Chu
Heilongjiang Key Laboratory of Disaster Prevention, Mitigation and Protection Engineering, Northeast Petroleum University, No. 99 Xuefu Street, High-Tech Industrial Development Zone, Daqing 163319, China
Guiling Ma
Department of Architectural Engineering, Qiqihar Institute of Engineering, No. 01 Xiqing Road, High-Tech Industrial Development Zone, Qiqihar 161005, China
To study the eccentric compression mechanical properties of ECC and UHPC filled-in double steel tubular (EUFDST) composite columns, 35 full-scale EUCFDST composite column specimens were designed by ABAQUS software with the slenderness ratio (λ), UHPC cylinder compressive strength (fcu), inner and outer steel tubular strength (fy1, fy2), inner and outer steel tubular thickness (t1, t2), inner and outer steel tubular diameter ratio (Ω), eccentricity (e), and fiber content (γ) as the main parameters. By comparison with the simulation of the existing test, the correctness of the finite element modeling is verified. The parameter analysis of 35 full-scale EUFDST composite columns was carried out to obtain the eccentric load-mid-span deflection curve of the specimens. The failure mechanism, ductility coefficient, and stiffness degradation of the composite columns under different parameters were analyzed, and the section of the composite column was verified to satisfy the plane section assumption. The variation trend of maximum load-bearing capacity and the ductility of composite columns under different parameter conditions was obtained. By introducing the eccentricity correction coefficient and slenderness ratio correction coefficient, the calculation equation of the eccentric maximum load-bearing capacity of EUCFDST composite columns is statistically regressed, which provides a basis for the practical use of these columns.
