Techno Press
Techno Press

Steel and Composite Structures   Volume 27, Number 4, May25 2018, pages 417-426
DOI: http://dx.doi.org/10.12989/scs.2018.27.4.417
 
Seismic behaviors of ring beams joints of steel tube-reinforced concrete column structure
Yingying Zhang, Jianing Pei, Yuan Huang, Ke Lei, Jie Song and Qilin Zhang

 
Abstract     [Full Text]
    This paper presents the seismic behaviors and restoring force model of ring beam joints of steel tube-reinforced concrete column structure under cyclic loading. First, the main failure mode, ultimate bearing capacity, stiffness degradation and energy dissipation capacity are studied. Then, the effects of concrete grade, steel grade, reinforcement ratio and radius-to-width ratios are discussed. Finally, the restoring force model is proposed. Results show that the ring beam joints of steel tube-reinforced concrete column structure performs good seismic performances. With concrete grade increasing, the ultimate bearing capacity and energy dissipation capacity increase, while the stiffness degradation rates increases slightly. When the radius-width ratio is 2, with reinforcement ratio increasing, the ultimate bearing capacity decreases. However, when the radius-to-width ratios are 3, with reinforcement ratio increasing, the ultimate bearing capacity increases. With radius-to-width ratios increasing, the ultimate bearing capacity decreases slightly and the stiffness degradation rate increases, but the energy dissipation capacity increases slightly.
 
Key Words
    steel tube-reinforced concrete column structure; ring beam joints; seismic behaviors; restoring force model
 
Address
(1) Yingying Zhang, Jianing Pei, Yuan Huang, Jie Song:
State Key Laboratory for Geomechanics and Deep Underground Engineering, Jiangsu Key Laboratory of Environmental Impact and Structural Safety in Engineering, China University of Mining and Technology, Xuzhou Jiangsu, 221116, China;
(2) Ke Lei:
China Construction Eighth Engineering Divisions Corp. Ltd, Shanghai, 200135, China;
(3) Qilin Zhang:
College of Civil Engineering, Tongji University, Shanghai, 200092, China.
 

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