Abstract
In order to respond to the call of the strategy to vigorously carry out the fabricated structure, a new lateral connection joint-prefabricated steel joint with grouting bolt sleeve, which is adopted in the prefabricated steel reinforced concrete shear wall structure. Through uniaxial tensile test and finite element analysis, the prefabricated steel joint is comprehensive analysed, to get the impact trend of the anchorage length, sleeve wall thickness, bolt diameter to the connection performance, to determine the practicability and reliability of the connection way, and to ensure connection performance in the prefabricated steel reinforced concrete shear wall structure system. With the comparative studies, we find that, the finite element analysis and test results have high fitting degree, and can be verificated each other; the bolt diameter, sleeve wall thickness and anchor length all have positive effect trend on the tensile properties of the joint, but the influence decreases; The bolt diameter should be more than 12mm, the sleeve wall thickness should be more than 5mm, and the anchorage length should be more than 70mm; the shear bond diameter can reduce the diameter, and can change the section setting to the ring setting; the comparative results can provide reliable data support for the prefabricated steel connection joint design.
Highlights
In order to respond to the call of the strategy to vigorously carry out the fabricated structure, a new lateral connection joint- prefabricated steel joint with grouting bolt sleeve, which is adopted in the prefabricated steel reinforced concrete shear wall structure
The results reflected by the finite element simulation are highly similar; The pin penetrates through the sleeve walls on both sides and slightly bulges, the end of the pin is bent, and the grout part is separated from the sleeve
It can be shown that the failure modes of the test and the finite element analysis are in good agreement overall, and the finite element software can more intuitively reflect the possible failure modes of the nodes, which can better guide the experimental research process and predict the possible results
Summary
The test adopts the joint uniaxial tension method; the sleeve adopts Q235-grade square steel pipe with an outer diameter of 120 mm*120 mm, the yield strength of the pipe wall steel is 235MPa, the ultimate strength is 440MPa, and the modulus of elasticity is 2.06×105MPa; the section steel adopts Q235 grade 100 mm*100 mm*4.3 mm*6.5 mm H-shaped steel, the tensile strength is only 235MPa; the pin uses HRB400 grade steel, the tensile strength of 10mm diameter is 470MPa, the tensile strength of 12mm diameter is 485MPa, and the tensile strength of diameter 14mm is 14mm. 495MPa; The shear key uses HRB400-grade steel bars with a diameter of 10mm, and the tensile strength is 470MPa; The tensile strength of 12mm in diameter is 485MPa, and the tensile strength of 14mm in diameter is 495MPa; the shear key uses HRB400 steel bars with a diameter of 10mm, and the tensile strength is 470MPa; the grouting material is made of special sleeve grouting material produced by Tangshan Polar Bear Building Materials. The test adopts the joint uniaxial tension method; the sleeve adopts Q235-grade square steel pipe with an outer diameter of 120 mm*120 mm, the yield strength of the pipe wall steel is 235MPa, the ultimate strength is 440MPa, and the modulus of elasticity is 2.06×105MPa; the section steel adopts Q235 grade 100 mm*100 mm*4.3 mm*6.5 mm H-shaped steel, the tensile strength is only 235MPa; the pin uses HRB400 grade steel, the tensile strength of 10mm diameter is 470MPa, the tensile strength of 12mm diameter is 485MPa, and the tensile strength of diameter 14mm is 14mm.
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