Seismic behavior of the dune sand concrete beam-column joints under cyclic loading. (June 2022)

• Record Type: Journal Article
• Authors: Li, Zhiqiang; Zhai, Dongsheng; Li, Jie
• Is Part Of: Structures. Volume 40(2022)
• Page Start: 1014
• Page End: 1024
• Publication Date: 2022-06
• Subjects: Dune sand concrete (DSC) -- Beam-column (B-C) joints -- Cyclic behavior -- Failure mode -- Load-deflection curves; Structural engineering -- Periodicals; 624.1
• DOI: 10.1016/j.istruc.2022.04.083
• Languages: English
• ISSNs: 2352-0124

Abstract

Abstract: The use of locally available dune sand (DS) in concrete production can reduce cost and minimize the harmful consequences on environment. And the dune sand concrete (DSC) is a potential usage in construction. Therefore, the pilot study on the seismic behavior of the dune sand concrete (DSC) beam-column (B-C) joints under cyclic loading was investigated. Eleven 1/2-scale specimens were tested according to the concept "weak joint-strong member". The failure modes and destruction mechanism of DSC B-C joints were studied, and the influence of the dune sand replacement ratio r (the fine aggregates were replaced by different percentages of dune sand), axial compression ratio ( u ), stirrup ratio ( r sv ) on the seismic behavior of DSC B-C joints were discussed. Experimental results demonstrated that, with the increase of r, the deformation ability decreased; and the ductility of specimens moderately improved with the r of 20%. But the failure models, stiffness degradation, and energy dissipation capacity changed invisibly when r in the range between 20% and 80%. With the increase of u, the stiffness degradation and energy dissipation capacity increased, while the ductility decreased. With the increase of r sv, the deformation ability, energy dissipation capacity, and ductility increased, while the stiffness degradation decreased. Finally, the shear strength design methods were proposed for DSC B-C joints.