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Behavior of square geopolymer recycled brick aggregate concrete filled steel tubular stub columns under axial compression
Highlights 20 geopolymer recycled brick aggregate concrete filled steel tubular (GRBACFST) stub columns were tested under compression. The replacement ratio of recycled brick aggregates affects the behavior of stub columns. A Finite element model was modified for GRBACFST stub columns. Design models were verified for the ultimate strength and stiffness of GRBACFST stub columns.
Abstract Geopolymer recycled brick aggregate concrete filled steel tubes (GRBACFST) have the advantages of waste utilization, reducing carbon dioxide emission and overcoming concrete defects, which have broad potential applications in engineering structures. However, there is little relative research and regulations for this kind of structure with the innovative material. In this paper, 20 square GRBACFST stub columns were tested under axial compression to investigate the effects of concrete reference strength, replacement ratio of recycled brick aggregate (RBA) and thickness of steel tube. The failure mode, load–strain curve, ultimate strength, compressive stiffness and ductility were analyzed. Based on the material characteristics of geopolymer RBA concrete, the existing constitutive model of traditional core concrete confined by steel tube for finite element method was modified. Numerical data of 192 GRBACFST stub columns with different parameters under axial compression were generated and compared with the design methods for traditional concrete filled steel tubes. It can be found using the actual strength and elastic modulus of geopolymer RBA concrete, the existing formulas are capable of predicting the axial compressive ultimate strength and stiffness of square GRBACFST stub columns.
Behavior of square geopolymer recycled brick aggregate concrete filled steel tubular stub columns under axial compression
Highlights 20 geopolymer recycled brick aggregate concrete filled steel tubular (GRBACFST) stub columns were tested under compression. The replacement ratio of recycled brick aggregates affects the behavior of stub columns. A Finite element model was modified for GRBACFST stub columns. Design models were verified for the ultimate strength and stiffness of GRBACFST stub columns.
Abstract Geopolymer recycled brick aggregate concrete filled steel tubes (GRBACFST) have the advantages of waste utilization, reducing carbon dioxide emission and overcoming concrete defects, which have broad potential applications in engineering structures. However, there is little relative research and regulations for this kind of structure with the innovative material. In this paper, 20 square GRBACFST stub columns were tested under axial compression to investigate the effects of concrete reference strength, replacement ratio of recycled brick aggregate (RBA) and thickness of steel tube. The failure mode, load–strain curve, ultimate strength, compressive stiffness and ductility were analyzed. Based on the material characteristics of geopolymer RBA concrete, the existing constitutive model of traditional core concrete confined by steel tube for finite element method was modified. Numerical data of 192 GRBACFST stub columns with different parameters under axial compression were generated and compared with the design methods for traditional concrete filled steel tubes. It can be found using the actual strength and elastic modulus of geopolymer RBA concrete, the existing formulas are capable of predicting the axial compressive ultimate strength and stiffness of square GRBACFST stub columns.
Behavior of square geopolymer recycled brick aggregate concrete filled steel tubular stub columns under axial compression
Zheng, Yongqian (author) / Xiao, Yanjun (author) / Wang, Cunhua (author) / Li, Yonghui (author)
2022-11-17
Article (Journal)
Electronic Resource
English