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A platform for research: civil engineering, architecture and urbanism
Experimental, numerical and theoretical analysis of flange core-tube connection with self-tapping bolts
Abstract This paper proposes an assembled flange core-tube column connection with self-tapping bolt (AFCS), with high assembly efficiency, low pollution and high joint. Two different core tube thicknesses were set and static low circumferential reciprocation tests were performed. It was found that the core tube thickness has a small effect on the mechanical properties, and the hysteresis curves of the two members are basically the same. The two members in the tests were torn at the foot of the column, and it was concluded that the AFCS possesses good mechanical properties and can satisfy the design criteria of “strong joint, weak member”. At the same time, the self-tapping bolts performed well, and the slip did not increase after 0.03 rad, which can proof that the overall safety and reliability requirements were met. The finite element model (FEM) was established by ABAQUS, and the reliability was verified by changing the gap between the core tube and the column wall, the number and diameter of the self-tapping bolts. It was also concluded that the gap should not exceed 1/100 of the column wall width and the influence of each parameter on the mechanical properties of the connection from the largest to the smallest was the number of self-tapping bolts, the diameter of self-tapping bolts, and the gap between the core tube and the column wall. Finally, a theoretical analysis was conducted to derive the strength equations of the core tube and self-tapping bolt as well as the design method of the flange plate.
Highlights An innovative assembled steel column-column connection with self-tapping bolts (AFCS) is proposed. The new connection utilizes both inner sleeve and flange. Detailed experimental procedures and analysis are presented. Accurate finite element model is created. Reasonable theoretical analysis and formula derivation of the key parts are carried out.
Experimental, numerical and theoretical analysis of flange core-tube connection with self-tapping bolts
Abstract This paper proposes an assembled flange core-tube column connection with self-tapping bolt (AFCS), with high assembly efficiency, low pollution and high joint. Two different core tube thicknesses were set and static low circumferential reciprocation tests were performed. It was found that the core tube thickness has a small effect on the mechanical properties, and the hysteresis curves of the two members are basically the same. The two members in the tests were torn at the foot of the column, and it was concluded that the AFCS possesses good mechanical properties and can satisfy the design criteria of “strong joint, weak member”. At the same time, the self-tapping bolts performed well, and the slip did not increase after 0.03 rad, which can proof that the overall safety and reliability requirements were met. The finite element model (FEM) was established by ABAQUS, and the reliability was verified by changing the gap between the core tube and the column wall, the number and diameter of the self-tapping bolts. It was also concluded that the gap should not exceed 1/100 of the column wall width and the influence of each parameter on the mechanical properties of the connection from the largest to the smallest was the number of self-tapping bolts, the diameter of self-tapping bolts, and the gap between the core tube and the column wall. Finally, a theoretical analysis was conducted to derive the strength equations of the core tube and self-tapping bolt as well as the design method of the flange plate.
Highlights An innovative assembled steel column-column connection with self-tapping bolts (AFCS) is proposed. The new connection utilizes both inner sleeve and flange. Detailed experimental procedures and analysis are presented. Accurate finite element model is created. Reasonable theoretical analysis and formula derivation of the key parts are carried out.
Experimental, numerical and theoretical analysis of flange core-tube connection with self-tapping bolts
Li, Yanglong (author) / Zhang, Liao (author) / Zhang, Yanxia (author) / Wu, Binglong (author) / Huang, Zhewen (author)
2023-11-12
Article (Journal)
Electronic Resource
English
| European Patent Office | 2021
Core tube type prestressed column joint with self-tapping bolts
| European Patent Office | 2021