Tianjin Tianlang Architectural Design Ltd Company

Tianjin, China

Tianjin Tianlang Architectural Design Ltd Company

Tianjin, China
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Li B.,Yanbian University | Zhang P.,Yanbian University | Zhang P.,Tianjin Tianlang Architectural Design Ltd Company | Jin A.,Yanbian University | And 2 more authors.
Tumu Gongcheng Xuebao/China Civil Engineering Journal | Year: 2012

To analyze the effectiveness of predictions of the axial compression bearing capacity of axially compressed specimens, the axial compressive bearing capacity enhancement coefficient, and ductility coefficient, with the main parameters being width-thickness, mixed ratio, hoop coefficient, fifteen thin-walled square steel stub columns filled with demolished concrete lump are tested under axial loading. The results show that during in destruction no ribbed stiffener columns show softening behavior and ribbed stiffener columns show strengthening phenomenon; the axial loading bearing capacity of the ribbed stiffener columns is similar to the columns filled with cast-in-situ concrete when the width-thickness is the same, and the axial loading bearing capacity of the ribbed stiffener columns of width-thickness of 64 and 72 is similar to the ribbed no stiffener columns of width-thickness of 72 and 80 when the mixed ratio is the same; the related formulas with hoop coefficient have higher calculation accuracy; the axial compression bearing capacity enhancement coefficient of no ribbed stiffener columns is parabolicly related with width-thickness and hoop coefficient, while the ribbed stiffener columns has linear relations, and all are reduced with the decrease of the mixed ratio; ductility coefficient is enhanced with the decrease of hoop coefficient; through regression analysis, the axial compression bearing capacity calculation formula for thin-walled square steel stub columns filled with demolished concrete lump has good accuracy.


Li B.-S.,Yanbian University | Zhang P.,Yanbian University | Zhang P.,Tianjin Tianlang Architectural Design Ltd Company | Jin A.-H.,Yanbian University | And 2 more authors.
Jianzhu Cailiao Xuebao/Journal of Building Materials | Year: 2012

To reveal axial compressive deformation and failure mode of thin-walled square steel stub columns filled with recycled demolished concrete lump, the tests were taken under axial loading with the result that the failure mode and overall deformation characters were observed and curves of load and strain (or deformation) were obtained. Through the curves of load and strain (or deformation), and by analysis of the mechanical performance and failure mode influenced by the strength of core concrete in combination layer between recycled demolished concrete lump and green concrete, the theoretical failure model of this structure component was proposed. Test results show that waist drum shape crumple failure is the main failure mode. In the elastic state, each strain growth is uniform in middle section and corner of steel stub, and both of the longitudinal strain growth is also uniform. In destruction stage, no ribbed stiffener specimens take on the ruck building, and ribbed stiffener specimens take on stiffening character. The strength of core concrete in combination layer has greater influence on the mechanical performance and failure mode.

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