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A high damping stay cable based on shear thickening liquid

A high-damping, stay-cable technology, used in bridges, bridge parts, textiles and papermaking, etc., can solve problems such as shear modulus reduction, and achieve the effect of suppressing large vibration, wide application range and high utilization rate

Active Publication Date: 2019-01-22
SHENYANG JIANZHU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the existing composite stay cables are in use, there are the following defects: the viscoelastic damping material is filled between the core layer and the composite layer in the prior art, and the elastic damping material is affected by the ambient temperature, frequency, strain amplitude and preset Significant effect of compression, i.e. shear modulus decreases rapidly with decreasing temperature

Method used

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  • A high damping stay cable based on shear thickening liquid
  • A high damping stay cable based on shear thickening liquid
  • A high damping stay cable based on shear thickening liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1: Such as figure 1 , figure 2 As shown, the schematic diagram of the cross-sectional structure of the present invention shows that the core layer 1, two layers of STF interlayer tape 2 (multiple layers can be set), the strand layer 4, the STF wrapping tape 5, and the inner layer protection are arranged sequentially from the inner layer to the outer layer. Cover 6 and outer protective cover 7; multiple strands 11 are arranged in the core layer, the strand 11 is composed of several galvanized steel strands closely arranged, and the adjacent strands 11 are filled with STF 3 particles; outside the core layer The thickness of the STF interlayer tape covered with two layers of high-strength polyester fiber sealing and shearing thickening liquid can be set according to the vibration control requirements of the stay cable. The STF interlayer tape is wrapped in the direction of the stay cable. The strands are arranged continuously and densely, neatly wound, without damag...

Embodiment 2

[0023] Embodiment 2: The difference between this embodiment and embodiment 1 is as follows: figure 2 , image 3 Shown: For bridges with small spans, a small diameter STF-based high damping stay cable is required. From the inner layer to the outer layer, the core layer, the STF wrapping tape layer, the inner protective cover and the outer layer are arranged in sequence Protective sleeve; multiple strands are arranged in the core layer, the strands are composed of several galvanized steel strands closely arranged, and the adjacent strands are filled with STF, and relative movement occurs between the strands. STF particles strengthen the strands The friction force between the core layer is covered with STF wrapping tape, and STF is filled between the core layer and the STF wrapping tape. The STF wrapping tape is STF modified. The wrapping tape is made of high-strength polyester fiber. The number is determined according to the vibration control requirements of the stay cable, and i...

Embodiment 3

[0024] Example 3: This example is different from Examples 1 and 2 in that: for strong and typhoon, a STF-based high-damping stay cable is set to suppress the large vibration of the stay cable, and the inner layer to the outer layer are sequentially arranged with cores. Layer, N-layer STF sandwich tape 2, N-layer cable strand layer, STF wrapping tape layer, inner protective sleeve and outer protective sleeve; multiple strands are arranged in the core layer, and the strands are composed of several galvanized steel strands Closely arranged, the adjacent strands are filled with STF, and relative movement is generated between the strands. The STF particles enhance the friction between the strands; the core layer is covered with STF interlayer tape, which is based on the cable diameter It can be set to 0.5mm-2mm in accordance with the requirements of vibration control, and STF is filled between the core layer and the STF interlayer belt; when the STF interlayer belt is set with N laye...

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Abstract

The invention relates to a high-damping stay cable based on shear thickening fluid (STF) and belongs to the field of stay cable vibration control. The high-damping stay cable is composed of a core layer, STF interlayer strips, a cable strand layer, an STF wrapping strip, an inner layer protective sleeve and an outer layer protective sleeve. The core layer is internally provided with a plurality of cable strands. The positions between adjacent cable strands are filled with the STF. The core layer is coated with the corresponding STF interlayer strip. The cable strand layer is tightly attached to the corresponding STF interlayer strip. The positions between cable strands are filled with the STF. The outermost portion of the cable strand layer is provided with the STF wrapping strip. The outer layer of the STF wrapping strip is provided with the inner layer protective sleeve. The outer layer of the inner layer protective sleeve is provided with the outer layer protective cover. When the stay cable vibrates, firstly, relative movement is generated between cable strands, and friction force between the cable strands is enhanced by the STF; secondly, the STF in the STF interlayer strips is instantaneously converted into a solid phase from a liquid phase, a shear thickening behavior occurs, and therefore additional high damping force is provided; and thirdly, the STF wrapping strip has a high-damping characteristic.

Description

Technical field [0001] The invention belongs to the technical field of stay cable vibration control, and in particular relates to a high damping stay cable based on shear thickening liquid. Background technique [0002] Since the Stromsund Bridge in Sweden was built in the 1960s, the cable-stayed bridge has emerged as a new type of bridge structure worldwide due to its excellent mechanical properties and beautiful architectural style. And with the needs of the development of human society, the span of cable-stayed bridges has exceeded kilometers, such as Sutong Bridge (1088m), Stonecutters Bridge (1018m), Russky Island Bridge (1104m) and the Hutong Yangtze River Bridge under construction ( 1092m) etc. As the span of the cable-stayed bridge continues to increase, the cable stays will also become longer and more flexible, and its vibration characteristics are becoming more and more obvious to the thousand-meter long-span cable-stayed bridge. The main manifestations are: ( 1) Caus...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E01D19/16D07B1/14
CPCD07B1/14D07B1/141D07B2201/2082D07B2201/2089D07B2201/2092D07B2205/2042D07B2501/203E01D19/16
Inventor 魏明海齐佩佩孙丽张春巍朱春阳
Owner SHENYANG JIANZHU UNIVERSITY