Embedded composite damping structure and construction method thereof

A composite damping and damping structure technology, which is applied in basic structure engineering, protection devices, buildings, etc., can solve problems such as unfavorable vibration isolation trench load-bearing and collapse, achieve low production cost, attenuate noise and vibration transmission, reduce vibration and vibration. Effects of Noise Pollution

Inactive Publication Date: 2016-03-09
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existence of orifice plates, special-shaped plates and empty grooves in the vibration isolation ditch damping components is not conducive to the ground

Method used

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  • Embedded composite damping structure and construction method thereof
  • Embedded composite damping structure and construction method thereof
  • Embedded composite damping structure and construction method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] An embedded composite damping structure, comprising a multi-layer damping structure placed in a trench, a reinforced concrete layer 3 located on the side walls and bottom of the trench, and a viscoelastic damping layer II4; the viscoelastic damping layer II4 is located on the reinforced concrete Between layer 3 and the multilayer damping structure. The multi-layer damping structure includes a constrained layer 1 and a viscoelastic damping layer I2, and a viscoelastic damping layer I2 is arranged between two adjacent constrained layers 1; the viscoelastic damping layer I2 and the viscoelastic damping layer II4 It is a spray-on composite damping material. In the present invention, two constrained layers 1 and the damping layer I2 therebetween form a constrained damping structural unit, and a plurality of constrained damping structural units are superimposed to form a multi-layer damping structure for vibration in the vertical direction; the reinforced concrete layer 3 and...

Embodiment 2

[0045] Different from Example 1, the thickness ratio of the viscoelastic damping layer I2 to the constrained layer 1 is 1:800; the number of the constrained layer 1 is not less than 2; the thickness of the constrained layer 1 is 120 cm, and the The thickness of the viscoelastic damping layer I2 is 15 mm, and the thickness of the viscoelastic damping layer II4 is 2 mm. The constrained layer 1 is reinforced concrete.

[0046] Wherein, the spray-on composite damping material is obtained by reacting two components A and R according to a volume ratio of 1:0.8. The A component is a semi-prepolymer synthesized by 45 parts of low-functionality polyisocyanate and 70 parts of polyether polyol; the R component includes 15 parts of diamine chain extender, 40 parts of amino-terminated polyether, 70 parts of hydroxyl-terminated polyether, 1 part of intercalated graphite filler, and 15 parts of additives. The low-functionality polyisocyanate is 4,4'-diphenylmethane diisocyanate modified by...

Embodiment 3

[0055] Different from Example 1, the thickness ratio of the viscoelastic damping layer I2 and the constrained layer 1 is 1:50; the number of the constrained layer 1 is not less than 2; the thickness of the constrained layer 1 is 5 cm, and the The thickness of the viscoelastic damping layer I2 and the viscoelastic damping layer II4 is 1 mm. The constrained layer 1 is marble.

[0056] Wherein, the spray-on composite damping material is obtained by reacting two components A and R according to a volume ratio of 1:1.2. The spray-on composite damping material is obtained by reacting two components A and R according to 1:1, and the A component is a semi-prepolymer synthesized from 60 parts of low-functionality polyisocyanate and 50 parts of polyether polyol ; The R component includes 35 parts of diamine chain extender, 75 parts of amino-terminated polyether, 10 parts of hydroxyl-terminated polyether, 16 parts of intercalated graphite filler, and 30 parts of auxiliary agent. The low...

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Abstract

The invention discloses an embedded composite damping structure. The embedded composite damping structure comprises a multi-layer damping structure body, a reinforcement concrete layer and a viscoelastic damping layer II, wherein the multi-layer damping structure body is located in a groove, and the reinforcement concrete layer is located on the side wall and the bottom surface of the groove. The viscoelastic damping layer II is located between the reinforcement concrete layer and the multi-layer damping structure body. The multi-layer damping structure body comprises restraint layers and viscoelastic damping layers I, wherein each viscoelastic damping layer I is arranged between the two corresponding adjacent restraint layers. According to the embedded composite damping structure, a restraining and damping structural unit is formed by every two adjacent restraint layers and the damping layer I between the two restraint layers, and the multiple restraining and damping structural units are overlapped to form the multi-layer damping structure body aiming at vibration in the vertical direction; a restraining and damping structure aiming at vibration in the horizontal direction is formed through the reinforcement concrete layer, the multi-restraint damping structure body and the side walls of the damping layer II between the reinforcement concrete layer and the multi-restraint damping structure body. A composite restraining and damping shock absorption system is formed by combining the restraining and damping structures, and thus vibration which is transmitted to a target building by a rock soil body can be effectively reduced both in the horizontal direction and the vertical direction.

Description

technical field [0001] The invention relates to the field of rail traffic and construction, in particular to the field of vibration reduction and noise reduction of rail traffic and building structures, and in particular to an embedded composite damping structure and a construction method thereof. Background technique [0002] The vibration and noise generated during the operation of urban rail transit have a great negative impact on the health and safety of residents along the line, the protection of buildings, and the normal work of precision instruments. One of the main means of controlling subway vibration is to use damping materials to make damping structures to achieve the purpose of reducing vibration and noise. At present, damping materials are divided into materials, mainly including rubber sheets and polymer coatings. Rubber sheets are mainly various rubber damping pads, damping rubber sheets, rubber shock absorbers, etc. During construction, adhesives are require...

Claims

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Application Information

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IPC IPC(8): E02D31/08
CPCE02D31/08
Inventor 黄微波胡晓吕平马衍轩冯超马明亮万菲卢桂霞张晓丽
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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