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Bridge main cable saddle with self-returning function

A main cable saddle and bridge technology, applied in bridges, bridge parts, bridge construction, etc., can solve the problems of large vertical force of the main cable, difficult to meet the strength of the middle tower, increase the vertical deflection of the main span under load, etc., and achieve reduction Requirements, save engineering cost, and reduce the effect of later maintenance and repair

Inactive Publication Date: 2016-04-27
CHENGDU XINZHU ROAD & BRIDGE MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] For suspension bridges, the longitudinal constraints of the main cable on the side towers of two-tower suspension bridges and multi-tower suspension bridges are stronger, while the longitudinal constraints of the main cables on the top of the middle tower in multi-tower suspension bridges are weaker. When the load difference between the two sides of the middle tower is large , if the rigidity of the middle tower is too large, the force on the main cables on both sides will be very different, and the saddle and the main cable may slip due to insufficient frictional resistance, causing damage to the entire structural system; if the rigidity of the middle tower is too small, the top of the tower will If there is a large longitudinal displacement, the vertical deflection of the main span on the side with a large load will be increased, and the strength of the middle tower itself is not easy to meet
Therefore, the middle towers of multi-tower suspension bridges generally adopt steel towers or steel-concrete towers with moderate rigidity and reasonable strength. The scale is relatively large, and the advantages of technical and economic indicators are not obvious
[0003] And when the saddle slips, it is difficult to reset the saddle due to the large vertical force of the main cable

Method used

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  • Bridge main cable saddle with self-returning function
  • Bridge main cable saddle with self-returning function
  • Bridge main cable saddle with self-returning function

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] See Figure 1 to Figure 3 , A bridge main cable saddle with self-recovery function, comprising a base 3 and a saddle body 1. The bottom of the saddle body 1 is detachably connected to a rotating base 2 through a bolt, and the rotating base 2 is in sliding fit with the base 3, and The mating surface 4 of the rotating seat 2 and the base 3 is a concave arc surface.

[0023] Further, a sliding plate made of polytetrafluoroethylene material (not shown in the figure) is arranged on the arc-shaped bottom surface of the rotating seat 2, and a chrome-plated layer (not shown in the figure) is arranged on the top surface of the base 3, and the sliding plate and the chromium-plated layer are formed in cooperation Sliding friction pair. Another structure can also be adopted. The arc-shaped bottom surface of the rotating base 2 is provided with a sliding plate made of PTFE material (not shown in the figure), and an arc-shaped stainless steel layer is provided on the top surface of the...

Embodiment 2

[0028] See Figure 4 The difference between this embodiment and the first embodiment is that the mating surface 4 of the rotating seat 2 and the base 3 is a convex arc surface.

[0029] A convex sliding pair is arranged under the saddle body 1, and the saddle is rotating when sliding, and the height of the center of the saddle becomes lower. As the saddle rotates, the height of the sliding side becomes lower, and the height of the cable tension side increases.

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Abstract

The invention discloses a bridge main cable saddle with a self-returning function. The bridge main cable saddle with the self-returning function comprises a base and a saddle main body, wherein the bottom of the saddle main body is connected with a rotating seat; the rotating seat is in sliding fit with the base; and the fitting surfaces of the rotating seat and the base are arc surfaces. The invention is advantaged in that the saddle realizes a certain longitudinal slip capacity; when the difference between main span loads on the two sides is large, the stress is redistributed through relative slip between a main saddle and a middle tower so that the anti-slip safety of a main cable satisfies standard requirements; and meanwhile, the requirements on the structural rigidity of the middle tower are reduced so that it is possible to design the middle tower according to a reinforced concrete main tower; and for a multi-span suspension bridge, the construction cost can be saved and the later-stage maintenance amount can be reduced.

Description

Technical field [0001] The invention belongs to the technical field of bridges, and particularly relates to a bridge main cable saddle with a self-recovery function. Background technique [0002] For suspension bridges, two-tower suspension bridges and multi-tower suspension bridges have stronger longitudinal restraints on the side towers of the main cables, while multi-tower suspension bridges have weaker longitudinal restraints on the top of the central tower. If the rigidity of the middle tower is too large, the force of the main cables on both sides will be very different, the saddle and the main cable may slip due to insufficient frictional resistance, causing damage to the entire structural system; if the rigidity of the middle tower is too small, the top of the tower will Larger longitudinal displacement will increase the vertical deflection of the main span on the larger load side, and the strength of the mid-tower itself is not easy to meet. Therefore, the middle towers...

Claims

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Application Information

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IPC IPC(8): E01D19/14
CPCE01D19/14
Inventor 邹贻军刘海亮
Owner CHENGDU XINZHU ROAD & BRIDGE MASCH CO LTD
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