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WO2024098503A1 - Amortisseur à friction de pont de type à surveillance intelligente - Google Patents

Amortisseur à friction de pont de type à surveillance intelligente Download PDF

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Publication number
WO2024098503A1
WO2024098503A1 PCT/CN2022/138790 CN2022138790W WO2024098503A1 WO 2024098503 A1 WO2024098503 A1 WO 2024098503A1 CN 2022138790 W CN2022138790 W CN 2022138790W WO 2024098503 A1 WO2024098503 A1 WO 2024098503A1
Authority
WO
WIPO (PCT)
Prior art keywords
friction
plate
friction plate
bridge
intelligent monitoring
Prior art date
Application number
PCT/CN2022/138790
Other languages
English (en)
Chinese (zh)
Inventor
崔冰
徐源庆
李剑
过超
张太科
吴玲正
王志强
刘海亮
李冲
张松
白晓宇
Original Assignee
中交公路长大桥建设国家工程研究中心有限公司
广东省公路建设有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 中交公路长大桥建设国家工程研究中心有限公司, 广东省公路建设有限公司 filed Critical 中交公路长大桥建设国家工程研究中心有限公司
Publication of WO2024098503A1 publication Critical patent/WO2024098503A1/fr

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    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for
    • G01D21/02—Measuring two or more variables by means not covered by a single other subclass
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways

Definitions

  • the invention relates to the technical field of bridge detection, and in particular to an intelligent monitoring bridge friction damper.
  • the main beam end of the large-span bridge structure Under the action of vehicle live load and pulsating wind, the main beam end of the large-span bridge structure will produce obvious longitudinal displacement. As long as there are vehicles running on the bridge, the main beam will vibrate longitudinally back and forth continuously. This vibration is characterized by low speed and large cumulative displacement, with daily cumulative displacement reaching tens of meters and annual cumulative displacement reaching tens of kilometers.
  • Friction dampers have the advantages of high initial stiffness, simple structure, low cost, easy manufacturing materials, strong energy consumption capacity, and the performance of the damper is less affected by structure, speed, and frequency. They have a good control effect on low-speed vibrations. Therefore, friction dampers can be used to control the longitudinal vibration of the beam ends of large-span bridges under vehicle live loads and pulsating wind.
  • Friction dampers are mainly used for shock absorption in building structures. During daily service, friction dampers do not move. When the external load exceeds the sliding friction force under earthquake action, the friction dampers will slide to consume external energy, that is, the sliding displacement of the friction dampers during service is small. Therefore, the following problems exist when conventional friction dampers are used for vibration reduction of long-span bridges:
  • the present invention provides an intelligent monitoring bridge friction damper.
  • An intelligent monitoring bridge friction damper comprising a bridge friction damper body and an intelligent monitoring system
  • the bridge friction damper body comprises a sliding plate, a friction plate, a first connecting seat and a second connecting seat; the sliding plate and the friction plate are respectively provided with a stainless steel mirror surface and a friction plate on the contact surface with each other to form a friction pair; the connecting end of the sliding plate is connected to the first connecting seat through a first ear plate, and the connecting end of the friction plate is connected to the second connecting seat through a second ear plate;
  • the intelligent monitoring system includes a data acquisition module and a visual analysis module;
  • the data acquisition module includes a preload sensor assembly for real-time monitoring of the preload applied to the sliding plate and the friction plate, a load sensor assembly for real-time monitoring of the friction force of the bridge friction damper, and a displacement sensor assembly for real-time monitoring of the relative axial displacement of the friction plate and the first ear plate;
  • the visualization analysis module is used to display the operating dynamics of the damper in real time based on the collected preload, friction and displacement data, and to calibrate and grade its operating status according to reasonable status standards through data processing and analysis functions, and to provide real-time feedback on the error and adjustment value compared to the reasonable status.
  • the friction plate includes a first friction plate, a second friction plate and a third friction plate that are arranged at intervals, wherein the relative surfaces of the first friction plate and the second friction plate, and the relative surfaces of the second friction plate and the third friction plate are evenly spaced with a plurality of circular grooves, each of which is filled with a friction plate, and the thickness of the friction plate is greater than the depth of the circular groove.
  • a detachable matching clamping structure is provided between the friction plate and the circular clamping groove.
  • the friction plate is a wear-resistant composite material, which is any one of a high-performance polytetrafluoroethylene material, a polyimide material, a thermoplastic polyester-based composite material, or a phenolic resin-based composite material.
  • the sliding plate includes a first sliding plate arranged between the first friction plate and the second friction plate, and a second sliding plate arranged between the second friction plate and the third friction plate.
  • the mutual contact surfaces of the first sliding plate, the first friction plate and the second friction plate are provided with a stainless steel mirror surface
  • the mutual contact surfaces of the second sliding plate, the second friction plate and the third friction plate are provided with a stainless steel mirror surface.
  • the friction plate includes a plurality of pre-tightening bolts arranged in an array, and the plurality of pre-tightening bolts arranged in an array respectively penetrate the first friction plate, the first sliding plate, the second friction plate, the second sliding plate and the third friction plate in sequence, a first buffer spring is arranged between the rod of the pre-tightening bolt and the third friction plate and is fixed by a first spring pressure plate, a second buffer spring is arranged between the head of the pre-tightening bolt and the first friction plate and a second spring pressure plate is arranged between the head of the pre-tightening bolt and the second buffer spring, and a pre-tightening force sensor is arranged between the second spring pressure plates.
  • guide plates are respectively arranged on the upper and lower sides of the friction plate, and bolt holes are arranged on the guide plates, and the second friction plate is fixed by passing bolts through threaded holes penetrating up and down on the second friction plate.
  • the displacement sensor assembly comprises:
  • a telescopic rod top seat is fixed on the top guide plate;
  • a telescopic rod base is fixed to the ear plate and the displacement sensor body is arranged on the telescopic rod base, and a displacement acquisition interface is also arranged on the displacement sensor body;
  • a telescopic rod one end of which is fixed to the telescopic rod top seat, and the other end of which is fixed to the telescopic rod base.
  • first ear plate is connected to the end of the sliding plate through a pin
  • second ear plate is connected to the end of the friction plate through a pin
  • first ear plate is connected to the first base through a force measuring shaft
  • second ear plate is connected to the second base through a force measuring shaft
  • first base and the second base are respectively fixed to the bridge tower and the main beam in the bridge structure.
  • the present invention can reduce the wear of the friction material during the service of the friction damper to the greatest extent by adopting a friction material with a low linear wear rate and arranging a stainless steel plate on the surface of the steel plate that rubs against the friction material, thereby meeting its long-distance wear requirements; and the two extreme positions of the first connecting seat and the second connecting seat within the rotation range can meet the conversion of the friction damper under different usage requirements, effectively improving practicality.
  • FIG1 is a schematic structural diagram of an intelligent monitoring bridge friction damper according to the present invention.
  • FIG2 is a front view of the bridge friction damper body of the present invention.
  • Fig. 3 is a cross-sectional view taken along line A-A in Fig. 1;
  • FIG4 is a top view of the bridge friction damper of the present invention.
  • FIG5 is a schematic diagram of the structure of a sliding plate in an embodiment of the present invention.
  • FIG6 is a schematic diagram of a friction plate in an embodiment of the present invention.
  • FIG. 7 is a schematic diagram of the structure of a preload force sensor in an embodiment of the present invention.
  • an intelligent monitoring bridge friction damper includes a bridge friction damper body and an intelligent monitoring system
  • the bridge friction damper body comprises a sliding plate 2, a friction plate 3, a first connecting seat 121 and a second connecting seat 122; the sliding plate 2 and the friction plate 3 are respectively provided with a stainless steel mirror surface 22 and a friction plate 8 on their contact surfaces to form a friction pair; the connecting end of the sliding plate 2 is connected to the first connecting seat 121 through the first ear plate 1, and the connecting end of the friction plate 3 is connected to the second connecting seat 122 through the second ear plate;
  • the intelligent monitoring system includes a data acquisition module and a visual analysis module;
  • the data acquisition module includes a preload sensor assembly for real-time monitoring of the preload applied to the sliding plate 2 and the friction plate 3, a load sensor assembly for real-time monitoring of the friction force of the bridge friction damper, and a displacement sensor assembly for real-time monitoring of the relative axial displacement of the friction plate and the first ear plate 1;
  • the visualization analysis module is used to display the damper operation dynamics in real time based on the collected preload, friction and displacement data, and to calibrate and grade its operation status according to reasonable status standards through data processing and analysis functions, and to provide real-time feedback on the error and adjustment value from the reasonable status.
  • the friction plate 3 includes a first friction plate 3a, a second friction plate 3b and a third friction plate 3c that are arranged at intervals, wherein the relative surfaces of the first friction plate 3a and the second friction plate 3b, and the relative surfaces of the second friction plate 3b and the third friction plate 3c are evenly spaced with a plurality of circular grooves 32, each of which is filled with a friction plate 8, and the thickness of the friction plate 8 is greater than the depth of the circular groove 32.
  • the friction plate 8 will be worn out during long-term use, so the present invention adopts a detachable matching clamping structure between the friction plate 8 and the circular clamping groove 32 to facilitate the removal and replacement of the friction plate 8 during equipment maintenance.
  • the friction plate 8 is a wear-resistant composite material.
  • the friction material 8 is required to have a low linear wear rate. Under non-lubricated conditions, its linear wear rate is ⁇ 30 ⁇ m/km, and the friction coefficient is stable, which can meet the needs of long-distance wear.
  • the wear-resistant composite material is any one of a high-performance polytetrafluoroethylene material, a polyimide material, a thermoplastic polyester-based composite material, or a phenolic resin-based composite material.
  • the present invention can reduce the wear of the friction plate 8 during the service of the friction damper to the greatest extent by adopting a friction plate 8 with a low linear wear rate and arranging a stainless steel mirror surface 22 on the surface of the sliding plate 2 opposite to the friction plate 8, thereby meeting the requirement of long-distance wear; and the two extreme positions of the first connecting seat 121 and the second connecting seat 122 within the rotation range can meet the conversion of the friction damper under different usage requirements, effectively improving practicality.
  • the sliding plate 2 includes a first sliding plate 2a arranged between the first friction plate 3a and the second friction plate 3b, and a second sliding plate 2b arranged between the second friction plate 3b and the third friction plate 3c.
  • the mutual contact surfaces of the first sliding plate 2a, the first friction plate 3a and the second friction plate 3b are provided with a stainless steel mirror surface 22, and the mutual contact surfaces of the second sliding plate 2b, the second friction plate 3b and the third friction plate 3c are provided with a stainless steel mirror surface 22.
  • the number of friction plates 3 and sliding plates 2 is only a set of embodiments provided by the present invention. Those skilled in the art can set the number and setting form of friction plates 3 and sliding plates 2 in combination with the actual situation and the present invention. However, it should be noted that the number of friction plates 3 is 1 more than the number of sliding plates 2, that is, when the number of friction plates 3 is n, the number of sliding plates 2 is n-1.
  • the friction plate 3 includes a plurality of pre-tightening bolts arranged in an array, and the plurality of pre-tightening bolts arranged in an array respectively penetrate the first friction plate 3a, the first sliding plate 2a, the second friction plate 3b, the second sliding plate 2b and the third friction plate 3c in sequence, a first buffer spring 7a is arranged between the rod of the pre-tightening bolt 5 and the third friction plate 3c and is fixed by a first spring pressure plate 6a, a second buffer spring 7b is arranged between the head of the pre-tightening bolt 5 and the first friction plate 3a, and a second spring pressure plate 6b is arranged between the head of the pre-tightening bolt 5 and the second buffer spring 7b, and a pre-tightening force sensor 9 is arranged between the second spring pressure plates 6b.
  • the buffer spring of the present invention can be a disc spring, a coil spring, a rubber elastic body, etc.
  • the buffer spring has good deformation ability to prevent the preload force from changing suddenly due to the wear of the friction material.
  • a preload force sensor 9 is also provided between the head of the preload bolt 5 and the second spring pressure plate 6b. In this way, the operator can apply the preload force by tightening the nut, and the preload force sensor 9 can monitor the change of the preload force.
  • guide plates 4 are respectively provided on the upper and lower sides of the friction plate 3, and bolt holes are provided on the guide plates 4, which are fixed by bolts passing through threaded holes passing through the upper and lower sides of the second friction plate 3b. After the bolts are tightened, the guide plates 4 can clamp the upper and lower sides of the friction plate 3, and can prevent the friction plate 3 and the sliding plate 2 from rotating relative to each other.
  • the friction plate 8 is tightly fitted with the stainless steel mirror surface 22 on the sliding plate 2 to form four sets of friction pairs, which can consume external energy after sliding.
  • the displacement sensor assembly 11 includes:
  • Displacement sensor body 111 Displacement sensor body 111
  • a telescopic rod top seat 113 wherein the telescopic rod top seat 113 is fixed on the top guide plate 4a;
  • a telescopic rod base 115 wherein the telescopic rod base 115 is fixed on the ear plate 1 and the displacement sensor body 111 is disposed on the telescopic rod base 115, and a displacement acquisition interface 114 is also disposed on the displacement sensor body 111;
  • the telescopic rod 112 has one end fixed to the telescopic rod top seat 113 and the other end fixed to the telescopic rod base 115 .
  • the first ear plate 1 is connected to the end of the sliding plate 2 via a pin, and the second ear plate is connected to the end of the friction plate 3 via a pin; the first ear plate 1 is connected to the first connecting seat 121 via a force measuring shaft, and the second ear plate is connected to the second base via a force measuring shaft 10, and the first connecting seat 121 and the first connecting seat 122 are respectively fixed to the bridge tower and the main beam in the bridge structure.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Vibration Dampers (AREA)

Abstract

Est divulgué un amortisseur à friction de pont de type à surveillance intelligente, qui comprend un corps d'amortisseur à friction de pont et un système de surveillance intelligente. Le corps d'amortisseur à friction de pont comprend une plaque coulissante, une plaque de friction, un premier siège de liaison et un second siège de liaison. Le système de surveillance intelligent comprend un module d'acquisition de données et un module d'analyse visuelle. Dans la présente invention, un matériau de friction présentant un faible taux d'abrasion linéaire est utilisé et une plaque d'acier inoxydable est disposée sur la surface d'une plaque d'acier meulée par le matériau de friction, de telle sorte que l'abrasion du matériau de friction pendant le service de l'amortisseur à friction est réduite au minimum, ce qui permet de satisfaire une exigence d'abrasion à longue distance de l'amortisseur à friction. De plus, deux positions extrêmes du premier siège de liaison et du second siège de liaison s'inscrivant dans une plage de rotation peuvent réaliser une conversion de l'amortisseur à friction sous différentes exigences d'utilisation, ce qui permet d'améliorer efficacement l'aptitude à la mise en œuvre.
PCT/CN2022/138790 2022-10-17 2022-12-13 Amortisseur à friction de pont de type à surveillance intelligente WO2024098503A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CN202211267930 2022-10-17
CN202211415390.X 2022-11-11
CN202211415390.XA CN115627688B (zh) 2022-10-17 2022-11-11 一种智能监测型桥梁摩擦阻尼器

Publications (1)

Publication Number Publication Date
WO2024098503A1 true WO2024098503A1 (fr) 2024-05-16

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CN (1) CN115627688B (fr)
WO (1) WO2024098503A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
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CN118209256A (zh) * 2024-05-22 2024-06-18 上海楹梁建筑科技有限公司 阻尼器智能监测方法与系统

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JP2003307253A (ja) * 2002-04-12 2003-10-31 Ohbayashi Corp 摩擦ダンパー
CN106382040A (zh) * 2016-09-14 2017-02-08 东南大学 一种摩擦耗能的自复位钢框架结构
CN111962708A (zh) * 2020-09-07 2020-11-20 上海史狄尔建筑减震科技有限公司 承载-多级复合消能屈曲约束支撑构件
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN118209256A (zh) * 2024-05-22 2024-06-18 上海楹梁建筑科技有限公司 阻尼器智能监测方法与系统

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