Experimental Analysis on the Mechanical Properties of Joints in Disc-Button Steel Tubular Scaffolding Under Different Wedge Tightness Conditions

WANG Ning; ZENG Fankui; QU Dandan; WANG Qianqian; XIE Xi

doi:10.3724/j.gyjzG22101811

Volume 55 Issue 5

May 2025

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WANG Ning, ZENG Fankui, QU Dandan, WANG Qianqian, XIE Xi. Experimental Analysis on the Mechanical Properties of Joints in Disc-Button Steel Tubular Scaffolding Under Different Wedge Tightness Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(5): 104-112. doi: 10.3724/j.gyjzG22101811

Citation:

WANG Ning, ZENG Fankui, QU Dandan, WANG Qianqian, XIE Xi. Experimental Analysis on the Mechanical Properties of Joints in Disc-Button Steel Tubular Scaffolding Under Different Wedge Tightness Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(5): 104-112. doi: 10.3724/j.gyjzG22101811

Citation:

WANG Ning, ZENG Fankui, QU Dandan, WANG Qianqian, XIE Xi. Experimental Analysis on the Mechanical Properties of Joints in Disc-Button Steel Tubular Scaffolding Under Different Wedge Tightness Conditions[J]. INDUSTRIAL CONSTRUCTION, 2025, 55(5): 104-112. doi: 10.3724/j.gyjzG22101811

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Experimental Analysis on the Mechanical Properties of Joints in Disc-Button Steel Tubular Scaffolding Under Different Wedge Tightness Conditions

doi: 10.3724/j.gyjzG22101811

1. Civil & Architecture Engineering, Xi'an Technological University, Xi'an 710021, China;
2. China Formwork and Scaffold Association, Beijing 100088, China

Received Date: 2022-10-18
Available Online: 2025-07-15

Abstract

Abstract

In order to explore the influence of the degree of plug wedge tightness on the torsional stiffness of disc-button steel tubular scaffolding， the mechanical properties of the steel tubular scaffolding joint were reasonably analyzed. By constructing the specimens of φ48 and φ60 connection joints of disc fastener frame， the torsional stiffness tests of the joints under different wedge tightness conditions were carried out， and the influence mechanism of plug wedge tightness on the torsional stiffness of the disc-button joint was revealed. Through quantitative analysis of the semi-rigidity of the joint， a reasonable range for plug wedge tightness was proposed. Through statistical nonlinear regression analysis， the relations between initial torsional stiffness and plug wedge tightness in disc-button joints were obtained. The analysis results showed that ： the plug wedge tightness had a great influence on the torsional stiffness of the disc-button joint. The plug wedge tightness should be controlled within a reasonable range to meet the bearing capacity requirements， and by using the "semi-rigid-relaxation-slip" trilinear piecewise broken line model， the torsional line stiffness of disc-button joints at different stages within different wedge tightness ranges was obtained， so as to systematically characterize the mechanical properties of disc-button steel tubular scaffolding and avoid security risks that caused by structural defects.
- disc-button steel tubular scaffolding,
- plug wedge tightness,
- torsional stiffness test of joints,
- nonlinear regression analysis,
- piecewise broken line model

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References(25)

References

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