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Damping shape memory alloy anchor bolt suitable for steel tower cable-stayed bridge and arrangement method of damping shape memory alloy anchor bolt

A technology of memory alloys and cable-stayed bridges, applied in bridge construction, bridges, bridge parts, etc., can solve the problems of steel-tower cable-stayed bridge research and lack of related technologies, so as to reduce earthquake damage, reduce residual displacement, and increase resistance effect of ability

Active Publication Date: 2018-11-16
NANCHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is precisely because of its superior anti-seismic properties that shape memory alloys have received extensive attention in the construction field, but their research and related technologies on steel tower cable-stayed bridges are relatively lacking.

Method used

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  • Damping shape memory alloy anchor bolt suitable for steel tower cable-stayed bridge and arrangement method of damping shape memory alloy anchor bolt
  • Damping shape memory alloy anchor bolt suitable for steel tower cable-stayed bridge and arrangement method of damping shape memory alloy anchor bolt
  • Damping shape memory alloy anchor bolt suitable for steel tower cable-stayed bridge and arrangement method of damping shape memory alloy anchor bolt

Examples

Experimental program
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Effect test

Embodiment 1

[0034] Embodiment 1, see figure 1 , figure 2 and image 3 , a shock-absorbing shape memory alloy anchor bolt suitable for steel tower cable-stayed bridges, comprising a first hexagonal nut 1, a second hexagonal nut 2, a first circular backing plate 3, a shape memory alloy anchor rod 4, an octagonal Nut 5, ordinary steel anchor rod 6, second circular backing plate 7 and third hexagonal nut 8, wherein: the bottom of the shape memory alloy anchor rod 4 is connected to the top of the ordinary steel anchor rod 6 through an octagonal nut 5, The top of the shape memory alloy anchor rod 4 is provided with a first circular backing plate 3, and the first circular backing plate 3 is fixedly installed on the shape memory alloy anchor rod 4 through the first hexagonal nut 1 and the second hexagonal nut 2. The bottom of the steel anchor rod 6 is provided with a second circular backing plate 7, the second circular backing plate 7 is fixedly installed on the ordinary steel anchor rod 6 by ...

Embodiment 2

[0035] Example 2, see Figure 7 , a shock-absorbing shape memory alloy anchor bolt suitable for steel tower cable-stayed bridges, wherein: the yield strength of the shape memory alloy anchor rod 4 is lower than that of the ordinary steel anchor rod 6, which can ensure that the shape memory alloy anchor rod Rod 4 is fully deformed, while ordinary steel anchor rod 6 is deformed little. All the other are with embodiment 1.

Embodiment 3

[0036] Example 3, see figure 1 , figure 2 and image 3 , a shock-absorbing shape memory alloy anchor bolt suitable for steel tower cable-stayed bridges, wherein: both ends of the shape memory alloy anchor rod 4 and the ordinary steel anchor rod 6 are provided with uniform external threads, and the external threads are consistent with the The internal threads of the first hexagonal nut 1, the second hexagonal nut 2, the octagonal nut 5 and the third hexagonal nut 8 are matched. All the other are with embodiment 1.

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Abstract

The invention discloses a damping shape memory alloy anchor bolt suitable for a steel tower cable-stayed bridge. The bottoms of shape memory alloy anchor rods are connected to the tops of ordinary steel anchor rods through octagonal nuts, and first circular pad plates are arranged on the tops of the shape memory alloy anchor rods and fixedly mounted on the shape memory alloy anchor rods through first hexagonal nuts and second hexagonal nuts. According to the damping shape memory alloy anchor bolt, the characteristics of high flexibility, low rigidity and superelasticity of the shape memory alloy anchor rods are utilized to greatly reduce seismic input energy, the residual displacement of steel towers is reduced, correspondingly earthquake damage caused to the steel tower cable-stayed bridge is reduced, and automatic resetting of the steel towers can be promoted. By means of the method, the resistance capability, namely a resistance effect on wind loads in practical application, of thesteel towers to transverse shear stress can be improved, and a shear force in the horizontal direction and a pulling force in the vertical direction due to wind can be effectively resisted.

Description

technical field [0001] The invention relates to the technical field of bridge engineering, in particular to a shock-absorbing shape-memory alloy anchor bolt suitable for steel tower cable-stayed bridges and a setting method thereof. Background technique [0002] my country's first cable-stayed bridge was the Sichuan Yunyang Bridge built in 1975. Since the 1990s, through the continuous adoption of new technologies and exploration of new methods, the field of cable-stayed bridges in China has developed by leaps and bounds, so that the development and construction of cable-stayed bridges in my country has entered the world's advanced ranks. As my country is an earthquake-prone country, there are relatively high requirements for the seismic resistance of bridges. The pylons of ordinary cable-stayed bridges are made of reinforced concrete, which is very easy to crack during earthquakes, resulting in damage to the bridge body and poor seismic performance. Therefore, there is an u...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D19/00E01D19/14E01D21/00
CPCE01D19/00E01D19/14E01D21/00
Inventor 田钦刘鑫祺张翎璇林莹伍洲鹏李联杰黄发明
Owner NANCHANG UNIV
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