Performance of concrete composite columns with lining hollow octagon steel tube-reinforced on impact resistance

Abstract

Abstract: In order to study impact behaviors of the lining hollow octagon steel tube-reinforced concrete column, an experimental study on the impact resistance of the lining hollow octagon steel tube-reinforced concrete column without guideway was carried out by using a guideway falling weight impact testing machine. In the test process, the time history curve of impact force and displacement of specimens in the whole process of impact were recorded by using force sensor and high-speed camera. At the same time, the effects of boundary conditions, impact energy and axial pressure ratio on the failure pattern and energy dissipation of the steel tube-reinforced concrete column were also observed and investigated. Our tested results show that the outsourced reinforced concrete can work in coordination with hollow octagon steel pipe and steel pipe concrete. When bearing impact loading, the impact height has the most significant influence on the energy dissipation capacity of the specimen, followed by the boundary condition. The influence of axial compression ratio is weak, and the influence of the wall thickness of circular steel tube becomes the weakest.

Key words: concrete-filled steel tube, composite column, energy dissipation, impact performance, failure characteristics

CLC Number:

TU312
TU37

ZHANG Kai-hang, WANG Rui, ZHAO Hui, ZHU Xiang. Performance of concrete composite columns with lining hollow octagon steel tube-reinforced on impact resistance[J]. Journal of Lanzhou University of Technology, 2020, 46(5): 137-143.

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