Study on Mechanical Properties of Self-Compacting Concrete and Its Filled in-Line Multi-Cavity Steel Tube Bundle Shear Wall

Hongbo Li, Hao Sun, Wanlong Zhang, Huiyan Gou and Qiuning Yang
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Hongbo Li: College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China
Hao Sun: College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China
Wanlong Zhang: College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China
Huiyan Gou: College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China
Qiuning Yang: College of Civil and Hydraulic Engineering, Ningxia University, Yinchuan 750021, China

Energies, 2019, vol. 12, issue 18, 1-18

Abstract: In this paper, five groups of C40 fly ash and silica fume self-compacting concrete (SCC) mix proportion tests and in-line multi-cavity steel tube bundle self-compacting concrete shear wall axial compression performance tests and numerical simulation are completed and presented. The influence of fly ash and silica fume additions on SCC mechanical properties and the filled in-line multi-cavity steel tube bundle shear wall mechanical properties are analyzed and studied. With an increase in the fly ash content from 10% to 40%, the compressive strength of self-compacting concrete increases firstly and then decreases. When the fly ash content is 30% and the silica fume content is 4%, the compressive strength of the 28 d age self-compacting concrete is the highest and the compressive strength formula of the wrapped curing SCC is proposed. The failure of steel tube bundle is multi-wave buckling failure. As the SCC is most obviously affected by the collar at the corner point of the steel tube bundle, its compressive strength is 110 MPa, and is 96 MPa higher than the concrete at the middle point of the web. The deformation resistance of SCC is obviously enhanced by the confinement effect.

Keywords: multi-cavity steel tube; axial compression performance; compressive strength formula; self-compacting concrete; confinement effect; fly ash; silica fume; numerical simulations (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2019
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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