CN109695200A - A kind of broad sense accelerating quality damper system of suspension bridge direction across bridge and torsion damping - Google Patents

A kind of broad sense accelerating quality damper system of suspension bridge direction across bridge and torsion damping Download PDF

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Publication number
CN109695200A
CN109695200A CN201910084387.6A CN201910084387A CN109695200A CN 109695200 A CN109695200 A CN 109695200A CN 201910084387 A CN201910084387 A CN 201910084387A CN 109695200 A CN109695200 A CN 109695200A
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girder
gearbox
mass
connecting rod
torsional
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CN109695200B (en
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檀永刚
闫晓丰
张哲�
黄才良
邱文亮
谭岩斌
耿铁锁
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Dalian University of Technology
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Dalian University of Technology
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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

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Vibration Prevention Devices (AREA)
  • Buildings Adapted To Withstand Abnormal External Influences (AREA)

Abstract

The present invention provides a kind of suspension bridge direction across bridge and the broad sense accelerating quality damper systems of torsion damping, belong to the passive control technology field of bridge structure.Anchoring quality block inside girder on the anchorage at girder both ends, has very big transverse direction and torsional rigidity and inertia by anchorage cable anchoring in beam.Lateral displacement and torsional displacement occur under the action of beam wind for girder, wherein lateral displacement passes to the gearbox being mounted on anchoring quality block by connecting rod, additional mass is passed to after gearbox amplifies, horizontal spring and sinker, the kinetic energy that girder vibrates is passed into additional mass, anchoring quality block inside girder is not influenced by beam wind, keep biggish rest inertia, it is capable of providing and gives gearbox and Vertical Spring one relatively-stationary support, girder is set to obtain biggish lateral damping force and vertical elastic support force, a TMD is equivalent on girder torsional direction, both direction synergy, achieve the purpose that reduce girder vibration.

Description

A kind of broad sense accelerating quality damper system of suspension bridge direction across bridge and torsion damping
Technical field
The invention belongs to the passive control technology fields of bridge structure, and in particular to the cushion technique of bridge, in particular to To a kind of suspension bridge direction across bridge and the broad sense accelerating quality damper system of torsion damping.
Background technique
The direction across bridge rigidity and torsion stiffness of large-span suspension bridge girder are relatively small, are easy under the action of lateral wind load It vibrates, or even the flutter based on reversing can occur.The oscillation damping method generallyd use has: (1) 1 setting wind resistance rope；(2) exist Tuned mass damper TMD is installed inside girder；(3) girder lateral stiffness and torsion stiffness are increased.Lateral wind resistance rope is suitable for Pedestrian Suspension Bridge, influences the appearance of bridge, and cost is higher；TMD effect in terms of vertical vibration damping is preferable, direction across bridge effectiveness in vibration suppression compared with Difference makes TMD fail if frictional force is larger between TMD and girder because of the effect for the force locking that rubs；Increase girder lateral stiffness The construction cost of bridge can be increased considerably with torsion stiffness.
Summary of the invention
The invention proposes a kind of suspension bridge direction across bridge and the broad sense accelerating quality damper systems of torsion damping, including beam Interior anchor cable, anchoring quality block, additional mass, gearbox, horizontal spring, Vertical Spring, sinker and connecting rod.Positioned at girder Internal anchoring quality block by anchorage cable anchoring in beam on the anchorage at girder both ends, with very big transverse direction and torsional rigidity and Inertia.Lateral displacement and torsional displacement occur under the action of beam wind for girder, and wherein lateral displacement is passed to by connecting rod The gearbox being mounted on anchoring quality block passes to additional mass, horizontal spring and sinker after gearbox amplifies, will The kinetic energy of girder vibration passes to additional mass, and the anchoring quality block inside girder is not influenced by beam wind, keeps larger Rest inertia, be capable of providing and give gearbox and Vertical Spring one relatively-stationary support, girder is made to obtain biggish transverse direction Damping force and vertical elastic support force, are equivalent to a TMD on girder torsional direction, and both direction synergy reaches and subtracts The purpose of small girder vibration, TMD high several times of the damping efficiency than equal quality.
Technical solution of the present invention:
The broad sense accelerating quality damper system of a kind of suspension bridge direction across bridge and torsion damping, including girder 1, anchorage 2, beam Interior anchor cable 3, input connecting rod 5, gearbox 6, output connecting rod 7, additional mass 8, horizontal spring 9, disappears at anchoring quality block 4 It can device 10, Vertical Spring 11 and sunpender 12.The generalized mass damping system includes girder 1, anchorage 2, anchor cable 3, anchoring matter in beam Gauge block 4, input connecting rod 5, gearbox 6, output connecting rod 7, additional mass 8, horizontal spring 9, sinker 10, Vertical Spring 11 and sunpender 12；Anchoring quality block 4 is located inside girder 1, is anchored on the anchorage 2 at both ends by anchor cable 3 in beam, anchors matter Gauge block 4 has very big transverse direction and torsional rigidity and inertia, and is not influenced by beam wind；Input 5 one end of connecting rod is fixed In 1 shell of girder, the other end is connected with the gearbox 6 being installed on anchoring quality block 4, gearbox 6 by output connecting rod 7 with 8 one end of additional mass is fixedly connected；Horizontal spring 9 and sinker 10 be respectively fixedly connected in 8 other end of additional mass with Between anchoring quality block 4；Lateral displacement and torsional displacement occur under the action of beam wind for girder 1, and wherein lateral displacement passes through Input connecting rod 5 passes to gearbox 6, passes to additional mass 8 by exporting connecting rod 7 after the amplification of gearbox 6, passes through The additional mass 8 of speedup absorbs the kinetic energy of main vibration of beam, and a part shows as the dynamic of the high-speed motion of additional mass 8 Can, a part is converted into the elastic potential energy of horizontal spring 9, some is dissipated by sinker 10；1 shell of girder and anchoring Vertical Spring 11 is installed between mass block 4, the anchoring quality block 4 inside girder 1 is not influenced by external environment wind, keep compared with Big rest inertia is supplied to the 11 1 relatively-stationary supports of gearbox 6 and Vertical Spring, girder 1 is made to obtain biggish cross To damping force and vertical elastic support force, on 1 torsional direction of girder, Vertical Spring 11 and anchoring quality block 4 form one TMD achievees the purpose that reducing girder 1 vibrates laterally with torsion both direction synergy.
Beneficial effects of the present invention:
(1) effectiveness in vibration suppression is significant.Since the supporting role of anchoring quality block 4 is larger, gearbox 6 can play stronger increasing Speed effect, the kinetic energy of additional mass 8 by with gear ratio square multiple proportion be amplified, girder 1 can be effectively absorbed Vibration kinetic energy.
(2) it is located at the anchoring quality block 4 inside girder 1 to be anchored on the anchorage 2 at both ends by anchor cable 3 in beam, not by outer The influence of boundary's ambient wind, with very big transverse direction and torsional rigidity and the inertia remaining stationary.
(3) what is played a major role for twisting vibration is that Vertical Spring 11 and anchoring quality block 4 form a TMD system, Anchor cable 3 plays resilient support for anchoring quality block 4 in beam, also improves the damping efficiency of torsion TMD.
Detailed description of the invention
Fig. 1 is the broad sense accelerating quality damper system floor map of a kind of suspension bridge direction across bridge and torsion damping.
Fig. 2 is main beam section and broad sense accelerating quality damper system layout drawing.
In figure: 1 girder；2 anchorages；Anchor cable in 3 beams；4 anchoring quality blocks；5 input connecting rods；6 gearboxes；7 output connections Bar；8 additional masses；9 horizontal springs；10 sinkers；11 Vertical Springs；12 sunpenders.
Specific embodiment
A specific embodiment of the invention is described in detail below in conjunction with technical solution and attached drawing.
Embodiment
The span setting of one Pedestrian Suspension Bridge is 80+300+80 meters, and width is 5 meters, and girder is steel box girder.Girder The anchoring quality block 4 that a quality is 5 tons is arranged in 1 inside, is made up of the Prefabricated parallel finished product rope that 4 beam specifications are 37- φ 5.0 Beam in anchor cable 3 be anchored on the anchorage 2 at both ends.The stretching force of anchor cable 3 is 48 tons in every Shu Liang, has anchoring quality block 4 Very big transverse direction and torsional rigidity and inertia, and do not influenced by external environment wind.Girder 1 occurs under the action of beam wind Lateral displacement and torsional displacement, wherein lateral displacement passes to the speed change being mounted on anchoring quality block 4 by inputting connecting rod 5 Case 6 passes to additional mass 8, input connecting rod 5 and output connecting rod 7 by exporting connecting rod 7 after the amplification of gearbox 6 It is all rack-driving component, gearbox 6 is the speed changer that a speed increasing ratio is 1:10.Additional mass 8 by speedup absorbs The kinetic energy of main vibration of beam, a part show as the kinetic energy of the high-speed motion of additional mass 8, and a part is converted into horizontal bullet The elastic potential energy of spring 9, some is dissipated by sinker 10.Anchoring quality block 4 inside girder 1 is not by the shadow of beam wind It rings, keeps biggish rest inertia, be capable of providing and give gearbox 6 and Vertical Spring 11 1 relatively-stationary supports, make girder 1 Obtain biggish lateral damping force and vertical elastic support force, on 1 torsional direction of girder, Vertical Spring 11 and anchoring quality block 4 one TMD of composition achieve the purpose that reducing girder 1 vibrates laterally with torsion both direction synergy.

Claims (1)

1.一种悬索桥横桥向及扭转减振的广义加速质量阻尼器系统，其特征在于，该广义质量阻尼系统包括主梁(1)、锚碇(2)、梁内锚索(3)、锚固质量块(4)、输入连接杆(5)、变速箱(6)、输出连接杆(7)、附加质量块(8)、水平弹簧(9)、消能器(10)、竖向弹簧(11)和吊杆(12)；锚固质量块(4)位于主梁(1)内部，其通过梁内锚索(3)锚固在两端的锚碇(2)上，锚固质量块(4)具有很大的横向和抗扭刚度及惯性，并且不受横向风的影响；输入连接杆(5)一端固定在主梁(1)外壳，另一端与安装于锚固质量块(4)上的变速箱(6)相连，变速箱(6)通过输出连接杆(7)与附加质量块(8)一端固定连接；水平弹簧(9)和消能器(10)分别固定连接于附加质量块(8)另一端与锚固质量块(4)之间；主梁(1)在横向风的作用下发生横向位移和扭转位移，其中横向位移通过输入连接杆(5)传递给变速箱(6)，经变速箱(6)放大后通过输出连接杆(7)传递给附加质量块(8)，经过增速的附加质量块(8)吸收了主梁的振动的动能，一部分表现为附加质量块(8)的高速运动的动能，一部分转化为水平弹簧(9)的弹性势能，还有一部分被消能器(10)耗散掉；主梁(1)外壳与锚固质量块(4)之间安装有竖向弹簧(11)，主梁(1)内部的锚固质量块(4)不受外界环境风的影响，保持较大的静止惯性，提供给变速箱(6)和竖向弹簧(11)一个相对固定的支撑，使主梁(1)获得较大的横向阻尼力和竖向弹性支撑力，在主梁(1)扭转方向上，竖向弹簧(11)与锚固质量块(4)组成一个TMD，横向与扭转两个方向联合作用，达到减小主梁(1)振动的目的。1. a generalized acceleration mass damper system of suspension bridge transverse direction and torsional vibration damping, is characterized in that, this generalized mass damping system comprises main girder (1), anchorage (2), girder anchor cable (3), Anchor mass (4), input connecting rod (5), gearbox (6), output connecting rod (7), additional mass (8), horizontal spring (9), energy dissipator (10), vertical spring (11) and hanger rod (12); the anchoring mass block (4) is located inside the main beam (1), which is anchored on the anchorages (2) at both ends through the anchor cable (3) in the beam, and the anchoring mass block (4) It has great lateral and torsional stiffness and inertia, and is not affected by lateral wind; one end of the input connecting rod (5) is fixed to the shell of the main beam (1), and the other end is connected to the speed changer installed on the anchor mass (4). The box (6) is connected, the gearbox (6) is fixedly connected to one end of the additional mass block (8) through the output connecting rod (7); the horizontal spring (9) and the energy dissipator (10) are respectively fixedly connected to the additional mass block (8) ) between the other end and the anchor mass (4); the main beam (1) undergoes lateral displacement and torsional displacement under the action of the lateral wind, wherein the lateral displacement is transmitted to the gearbox (6) through the input connecting rod (5), After the gearbox (6) is enlarged, it is transmitted to the additional mass (8) through the output connecting rod (7). The kinetic energy of the high-speed movement of The vertical spring (11), the anchor mass block (4) inside the main beam (1) is not affected by the external environmental wind, maintains a large static inertia, and provides one for the gearbox (6) and the vertical spring (11). The relatively fixed support enables the main beam (1) to obtain greater lateral damping force and vertical elastic support force. In the torsion direction of the main beam (1), the vertical spring (11) and the anchor mass (4) form a TMD, the combined action of transverse and torsional directions, achieves the purpose of reducing the vibration of the main beam (1).
CN201910084387.6A 2019-01-29 2019-01-29 Generalized acceleration mass damper system for transverse bridge direction and torsional vibration reduction of suspension bridge Active CN109695200B (en)

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CN110847017A (en) * 2019-12-31 2020-02-28 河南省交通规划设计研究院股份有限公司 Single-pulley type bridge damping structure
CN110894706A (en) * 2019-12-31 2020-03-20 河南省交通规划设计研究院股份有限公司 Pulley type bridge damping structure
CN110965458A (en) * 2019-12-31 2020-04-07 河南省交通规划设计研究院股份有限公司 Plane gear type bridge damping structure
WO2021056233A1 (en) * 2019-09-25 2021-04-01 大连理工大学 Variable-acceleration curved-surface spiral gear transmission mechanism for variable-speed mass damping system
CN114687294A (en) * 2022-04-18 2022-07-01 重庆交通大学 Prefabricated concrete-filled steel tube and reinforced concrete bridge and its construction method

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WO2018196276A1 (en) * 2017-04-26 2018-11-01 中铁大桥科学研究院有限公司 Ultralow frequency tuned liquid mass damper
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CN110965458A (en) * 2019-12-31 2020-04-07 河南省交通规划设计研究院股份有限公司 Plane gear type bridge damping structure
CN114687294A (en) * 2022-04-18 2022-07-01 重庆交通大学 Prefabricated concrete-filled steel tube and reinforced concrete bridge and its construction method

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