Laterally rotatable sling lower end pin-on connection assembly

Abstract

The invention discloses a pin-connected connection component capable of transversely rotating for the lower end of a sling. A fork-shaped ear plate of a lower anchor head is connected with a stiffening-beam ear plate through a pin shaft; the side wall of a round hole for being connected with the pin shaft in the stiffening-beam ear plate is processed into a circular arc surface; a circular arc groove is formed in the middle of the pin shaft; the circular arc surface on the stiffening-beam ear plate is matched with the circular arc groove in the pin shaft; a lining made of self-lubricating materials, which can reduce frictional resistance, is arranged on the contact surface between the circular arc surface on the stiffening-beam ear plate and the circular arc groove in the pin shaft; a notch is formed in one end of the pin shaft; a baffle is inserted into the notch and fixed on the fork-shaped ear plate of the lower anchor head, so that the transverse movement of the pin shaft is limited. Compared with a conventional pin-connected connection assembly, the pin-connected connection assembly disclosed by the invention not only can realize the longitudinal rotation between a stiffening beam and the sling, but also can realize the transverse relative rotation between the sling and the stiffening beam; when the pin-connected connection assembly disclosed by the invention is used for enabling the sling and the stiffening beam of a suspension bridge to be connected in a pin-connected manner, the bending of a steel wire at the anchoring position of the sling can be lowered, the possible transverse bending moment of the stiffening-beam ear plate at a welding position can be reduced, the secondary bending stress of the steel wire of the sling is reduced, and the transverse damage of the ear plates is avoided, so that the force transmission between the sling and the stiffening-beam ear plate is guaranteed to be safe.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a laterally rotatable lower end pin of a sling used for connection between a suspension bridge sling and a stiffening beam, which can reduce the secondary stress of steel wire bending at the anchorage of the sling and avoid lateral damage to the ear plate Plug-in connection components. Background technique [0002] With the needs of my country's economic and social development, it is necessary to build long-span bridges in order to cross large rivers, deep valleys and straits, and connect to natural moats. As the type of bridge with the largest spanning capacity so far, the suspension bridge is more and more favored by bridge engineers and widely recognized by the public for its magnificent momentum. [0003] Suspension bridge sling is an important force-transmitting component that transmits the load on the stiffening girder to the main cable. The reliability of the connection a...

AI Technical Summary

Problems solved by technology

However, under the action of lateral load, the stiffening beam moves laterally, and the sling tilts laterally. Since the lower anchor head of the sling cannot rotate laterally but remains vertical, the sling and the lower anchor head are laterally bent at the anchor mouth, causing the sling The bending secondary stress of the steel wire at the anchor mouth is relatively large; in addition, there is an included angle between the tension direction of the sling and the vertical direction of the ear plate of the stiffened beam, and a large transverse bending moment is generated at the weld at the root of the ear plate, resulting in the weld seam of the ear plate destroy

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