Anchor drawplate type cable-beam anchorage structure for cable-stayed bridge

Abstract

The invention discloses an anchor drawplate type cable-beam anchorage structure for a cable-stayed bridge, which comprises a main steel beam and an anchor drawplate component, wherein the anchor drawplate component is arranged on the top surface of the main steel beam; the anchor drawplate component comprises an anchor drawplate, an anchor pipe and an anchor backing plate, wherein the anchor pipe is used for penetrating a stayed-cable; the anchor backing plate is arranged at the bottom of the anchor pipe and installed vertically to the anchor pipe; a counter bore-shaped groove is arranged in the top center position of the anchor drawplate along a central axis direction; the anchor pipe is installed at the upper part of the groove; a through hole corresponding to a pipe orifice of the anchor pipe is arranged on the anchor backing plate; a stayed-cable anchor head connected with a stayed-cable end head is installed at the lower part of the groove; a longitudinal web plate of the main steel beam extends upwards; an extending section on the longitudinal web plate corresponding to the bottom edge of the anchor drawplate protrudes out of a top plate of the main steel beam to form an outer web plate; and the bottom edge of the anchor drawplate is connected with the edge of the upper end of the outer web plate. The invention uses a connection structure of the outer web plate and the anchor drawplate and solves the problem of low fatigue strength of a cross welding structure; the top plate of the main steel beam is not required to have a Z-direction tear resisting characteristic, thus the material purchase and inspection charges are notably reduced and the structure stress is safer and more reliable.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a cable-beam anchoring structure. Background technique [0002] In the technical field of cable-stayed bridge engineering, the anchored connection between the cable-stayed cables and the steel girder is a key factor in the design. Since the anchored connection structure is under huge load for a long time, the reliability of its mechanical performance is directly related to the overall Therefore, it is one of the first conditions to ensure the safety of the bridge to develop a reasonable cable-beam anchorage structure. [0003] In the existing steel box girder cable-stayed bridge, the anchorage forms of the cable-stayed cable and the steel girder mainly include loose cable saddle plus anchor beam type, corbel (bracket) type, anchor tube type, anchor box type, and anchor-stayed plate type. , ear plate type, etc. Among them, the cable-stayed bridge anchor-plate type cab...

AI Technical Summary

Problems solved by technology

[0007] The present invention connects the extension section of the longitudinal web of the steel main girder with the anchor stay plate, compared with the existing method in which the bottom of the anchor stay plate is directly welded to the top plate of the steel girder, avoiding the cross welding stress in the main force direction Concentrated phenomenon, and at the same time solve the problem of low fatigue strength of the cross-shaped welded structure, with reliable strength and high fatigue strength; in addition, the roof of the steel girder does not need to have the characteristics of Z-direction tear resistance, the structure The form is more reasonable, which significantly reduces the cost of material procurement and inspection, and the structural force is safer and more reliable

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