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Novel prestressed cable structure based on shape memory alloy

A technology of memory alloy and prestress, which is applied in the direction of cable-stayed bridges, bridge forms, bridge parts, etc., can solve the problems of stress loss and other problems, and achieve the effects of reducing the loss of prestress, good memory performance, and good resilience

Inactive Publication Date: 2019-10-29
BEIJING JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The defects of the above construction methods and tools are mainly stress loss

Method used

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  • Novel prestressed cable structure based on shape memory alloy
  • Novel prestressed cable structure based on shape memory alloy
  • Novel prestressed cable structure based on shape memory alloy

Examples

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Effect test

Embodiment 1

[0027] like Figure 1-4 As shown, the present invention provides a technical solution: a novel prestressed cable structure based on a shape memory alloy, including a shape memory alloy smart anchor cable, and the shape memory alloy smart anchor mainly includes a shape memory alloy helical cable 100 , shape memory alloy pipe joint 200, prestressed rib 300, shape memory alloy clamp 400 and spiral rib 600, the shape memory alloy clamp 400 is mainly composed of shape memory metal anchor clips, and the shape memory metal anchor clips are inserted into the anchor In the hole, the prestressed tendon 300 runs through the shape memory alloy helical cable 100, and the prestressed tendon 300 and the memory alloy helical cable 100 are connected by a shape memory alloy pipe joint 200, and the prestressed tendon 300- There is a bellows 500 on the side, and the spiral rib 600 is composed of multiple sets of shape memory alloy spiral cables 100. The shape memory alloy clamp 400 is used in con...

Embodiment 2

[0031] like Figure 1-4 As shown, the present invention provides a technical solution: a novel prestressed cable structure based on a shape memory alloy, including a shape memory alloy smart anchor cable, and the shape memory alloy smart anchor mainly includes a shape memory alloy helical cable 100 , shape memory alloy pipe joint 200, prestressed rib 300, shape memory alloy clamp 400 and spiral rib 600, the shape memory alloy clamp 400 is mainly composed of shape memory metal anchor clips, and the shape memory metal anchor clips are inserted into the anchor In the hole, the prestressed tendon 300 runs through the shape memory alloy helical cable 100, and the prestressed tendon 300 and the memory alloy helical cable 100 are connected by a shape memory alloy pipe joint 200, and the prestressed tendon 300- There is a bellows 500 on the side, and the spiral rib 600 is composed of multiple sets of shape memory alloy spiral cables 100. The shape memory alloy clamp 400 is used in con...

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Abstract

The invention discloses a novel prestressed cable structure based on shape memory alloy. The structure comprises a shape memory alloy intelligent anchor cable, a shape memory alloy intelligent anchormainly comprises a shape memory alloy spiral cable, a shape memory alloy pipe joint, a prestressed reinforcement, a shape memory alloy clamp and spiral reinforcements, and the shape memory alloy clampis mainly composed of a shape memory alloy anchoring clamping sheet; the shape memory alloy anchoring clamping sheet is inserted in an anchoring hole, and the prestressed reinforcement penetrates through the shape memory alloy spiral cable and is connected with the shape memory alloy spiral cable through the shape memory alloy pipe joint. According to the novel prestressed cable structure, by adopting the shape memory alloy clamp, the shape memory alloy pipe joint and the shape memory alloy spiral cable, the loss of prestress is lowered, the spanning capability of the structure is improved, the mechanical property, crack resistant property and durability of the structure are improved, so that the prestressed reinforcement in the structure is beneficial to maintenance of the structure in the operation period, and the service life of the structure is prolonged.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a novel prestressed cable structure based on a shape memory alloy. Background technique [0002] Stress loss is a major problem in prestressed structures and cable structures. [0003] External prestressing is the method of pouring components first, and then directly applying prestress on the components. The general practice is to first place post-tensioned prestressed tendons and corrugated pipes, structural steel bars and parts, and then install formwork and pour concrete. The prestressed tendons can be inserted into the casing first or later. After the concrete reaches the strength, the prestressed tendons are stretched to the required stress with a jack, and then anchored to both ends of the beam with anchor clamps, and the precompressed stress is transmitted to the component concrete through the anchor clamps at both ends. [0004] One of the main diseases of c...

Claims

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Application Information

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IPC IPC(8): E01D11/04E01D19/16E01D101/26
CPCE01D11/04E01D19/16E01D2101/26
Inventor 刘琛倪永军张雪峰安昱昊
Owner BEIJING JIAOTONG UNIV
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