EP3084077A1

EP3084077A1 - Viscoelastic damping device

Info

Publication number: EP3084077A1
Application number: EP14812771.5A
Authority: EP
Inventors: Rachid Annan
Original assignee: VSL International Ltd
Current assignee: VSL International Ltd
Priority date: 2013-12-18
Filing date: 2014-12-18
Publication date: 2016-10-26
Also published as: CN106062280A; EP3084078B1; JP6175195B2; US20160319499A1; US20160319498A1; CA2961110C; KR101742040B1; KR20160095163A; JP2017503095A; EP3084078A1; WO2015091870A1; US9551120B2; WO2015091859A1; CA2961110A1; CH709002A1; RU2016122746A

Abstract

The invention relates to a damping device (100) for damping relative movements between a stay and a structural element of a civil engineering construction, comprising: - a viscoelastic first damping system (110) for damping a first relative movement component, - a second damping system (120) in series with the viscoelastic first damping system and for damping a second relative movement component.

Description

VISCOELASTIC DAMPING DEVICE

Technical area

The present invention relates to the field of civil engineering. In particular, the present invention relates to a viscous damping device and method for damping relative displacements, and in particular oscillations, between a first structural element and a second structural element of a structure.

More particularly, but not limited to, the present invention relates to a device and a method of damping the vibration of cables of a construction work, such as the stays of a bridge, a roof, a suspended bridge, structural elements potentially subject to vibrations or large displacements or any other suspended structure.

State of the art

In civil engineering works, different structural elements are frequently subject to relative movements, for example relative movements or relative vibrations.

[0004] It is known to dampen such relative displacements by viscoelastic means or by means acting by friction or friction.

Thus, for example the document FR 2 664 920 proposes a vibration damping device of a bridge stay. This device acts viscoelastically and implements a rigid post mounted at an intermediate point of its length in a fixed base, so as to be able to oscillate around this point in all directions. The

movements of the foot of the column are damped for example by means of viscoelastic elements. The range of motion that can be damped is limited by the base at the foot of the pole. These measures does not absorb large displacements in all directions.

EP1035350 discloses another type of damping device, forming an internal damper operating by friction, wherein damping the transverse oscillations movements of a cable. However, this solution does not allow within the same damping device to damp several components of a large amplitude relative movement between a first structural element and a second structural element of a structure. [0007] FR2751673 discloses another device comprising an elastic or viscoelastic ring for damping the vibrations of a cable. This device is only suitable for the damping of low amplitude vibrations in a plane perpendicular to the cable.

FR2631407 relates to improvements to the devices for damping the vibrations of the stays, and implements an annular member mounted on a section of the stay. A cushion of pressurized paste or grease fills the annular cavity. A rigid structure connects the annular member to a foundation. Again, this device is not suitable for damping displacements of large amplitude in any direction.

It sometimes happens that the different structural elements of a structure move relative to one another according to different components, for example by translation along two or three directions, or by rotation about two axes, or according to a combination of displacements

linearly independent. For example, the stays of a bridge sometimes move in a first direction orthogonal to the stay and directed towards the structural element supported by the stay, for example the span of a bridge, and in another direction perpendicular to the first direction and the stay. Displacements of lesser amplitude in the direction of the stay can for example result from dilations. Some structural elements are also rotated relative to other structural elements of the same structure.

Existing damping devices are however poorly adapted to the damping of such complex displacements according to several components.

Brief summary of the invention

An object of the present invention is to provide a damping device free from the limitations of known devices, and

for damping displacements according to different components between a first structural element and a second structural element of a structure.

Another object of the invention is to accommodate small displacements and / or large amplitudes for each of the components of a complex displacement, with a damping that can be chosen independently for each of these components.

elementary.

According to the invention, these objects are achieved in particular by means of a viscoelastic damping device for damping the relative movements between a stay and a structural element of a civil engineering work, comprising: a first system damping device acting primarily to damp a first relative displacement component between said stay (20) and said structural member, a second damping system acting primarily to damp a second component of relative displacement between said stay and said structural member, the first damping system and the second system with damping being placed in series, at least one of the damping systems comprising a viscoelastic damping element. In this application, two damping systems are considered placed in series if the first end of a system is linked to a fixed point relative to the first end of the other system, and if the second end of first system is linked to a point whose movements are to be damped relative to the second end of the second system. In other words, the device comprises an intermediate point linked to the stay cable by at least a first system

damping, and linked to the structural element by at least a second damping system; the intermediate point is able to move damped both with respect to the stay and with respect to the structural element.

The invention relates in particular to a device in which a first end of the first system and a first end of the second system are connected to each other by a fixed link or

a second end of the first damping system is connected by a fixed or pivotal connection to a stay, and wherein the second end of the second system is connected by a fixed or pivotal connection to a structural member, for example to a foundation or bridge deck.

The first damping system may comprise a first fixed or pivoting element relative to the stay, a second element adapted to move in translation relative to the first element in a direction perpendicular to the stay, and a damping fluid

viscoelastic between the first and the second element. The first relative displacement component is then constituted by a first translation in a first direction (X) extending between the stay and the structural element. The second element of the first damping system may be constituted by a cylinder. The first element of the first damping system may consist of a piston sliding in said cylinder. The viscoelastic damping fluid may be arranged to oppose the movement of said piston in said cylinder. It is possible to reverse the position of the cylinder and the piston, that is to say to link the cylinder to the stay by a fixed or rotary connection.

The second damping system may comprise a third element and a fourth element able to move in rotation relative to the second element about an axis of rotation.

substantially parallel to the stay. A viscoelastic damping fluid may be provided between the third and fourth members. The second component of relative displacement can then be constituted by a second translation in a third direction, in a plane

perpendicular to the stay, and different from the first direction.

The second damping system can be connected by a pivoting joint to the first damping system.

The first damping system can be linked by a first pivoting joint to the structural element. The second damping system may comprise an end connected by a second pivoting joint to the structural element, and a second end connected by a third pivoting joint to an intermediate point of the first damping system, so as to exert a force opposing the rotation of the first damping system. The second damping system may comprise two piston-cylinder assemblies, which may for example be arranged in parallel or in a triangle. In this embodiment, the first piston-cylinder assembly comprises a cylinder connected by a third pivoting joint at an intermediate point of the first damping system, and a piston connected by a said second pivoting joint to said structural element of a first side. of the first pivoting joint. The second piston-cylinder assembly comprises a cylinder connected by a third pivoting joint at an intermediate point of the first damping system, and a piston connected by a said second

pivoting joint to said structural member on the other side of the first pivoting joint.

The second relative displacement component may be projected into said device in a rotation, for example a rotation about an axis substantially parallel to the direction of the stay.

A third damping system may be provided for damping a third relative displacement component between said stay and said structural member. In this case, the first damping system, the second damping system and the third damping system are placed in series. The third component of relative displacement is different from the first component of

relative displacement and the second relative displacement component.

The invention also relates to a civil engineering structure comprising a stay and a structural member supported by said stay, comprising at least one damping device as described.

This solution has the advantage over the prior art of allowing to treat independently each

component of the relative displacement and therefore each type of corresponding oscillation.

The various components of the displacement to be damped may be displacement components along different axes, for example translations and / or rotations along different axes.

The first relative displacement component may be constituted by a first translation in a first direction (X) extending between the first structural element and the second structural element. The second component of relative displacement may be constituted by a second translation in a third direction (Y) different from the first direction.

The third direction may be substantially orthogonal to the first direction (X) and a second direction (Z) tangent to the first structural member.

In addition, the various components of the displacement to be damped can be displacement components at different frequencies. For example, a first damping system can be optimized for the damping of low frequency displacements while another damping system can be optimized for

damping movements at higher frequencies, for example vibrations.

Advantageously, the damping of the displacements according to the first component (or second component) by means of the first (respectively second) damping device does not influence the damping of the displacements according to the second component.

(first component respectively) by the second (respectively first) damping device in series.

In the case of the presence of a third damping system, advantageously, the damping of the displacements according to the third component (or second component) thanks to the third (resp.

second) damping device does not influence the damping displacements according to the second component (respectively third component) by the second (respectively third) series damping device.

Also, in this case, advantageously, the depreciation of the

displacements according to the first component (respectively third component) thanks to the first (or third) damping device does not influence the damping of displacements according to the third component (respectively first) by the third (respectively first) device of series depreciation. Each damping system preferably allows a large amplitude relative displacement along or around a single axis. For example, the first damping system allows a large amplitude translation along the X axis, while the second damping system allows a large amplitude rotation around the Z axis. A translation is considered of great importance. amplitude when it exceeds for example 300 mm. A rotation is considered to be of great amplitude when it exceeds for example 5 °, preferably 10 °. The translations and or rotations along these main axes are damped thanks to the viscoelastic fluids.

All damping systems may include a viscoelastic fluid to dampen the movement between two movable elements. Alternatively, the device may comprise putting in series at least one viscoelastic damping system with at least one damping system based on friction between two movable elements.

At least one of the damping systems may be constituted by two viscoelastic system elements in parallel or in a triangle.

[0035] In addition, each damping system comprises

advantageously guiding elements which allow the parts in relative displacement to move relative to each other, and which preferably also allow small magnitude displacements along or around at least one axis different from the other. main axis. For example, the guide elements of the first damping system may allow translations of small amplitude along the Y axis, or low amplitude rotations around the Z axis. A displacement of less than 10 millimeters, or a rotation of less than 1 °, are for example considered as low amplitude displacements. These additional degrees of freedom limit the stresses on the system components as a function of the desired damping. According to a preferred arrangement, the first displacement component is a translation movement according to a first direction (X) extending between the first structural member and the second structural member.

According to another preferred arrangement, adopted alone or in combination with the preceding provision, the second relative displacement component is a translational movement in a second direction (Y). In the presence of these two provisions

preferably, the second direction (Y) is orthogonal to the first direction (X). Advantageously, this second direction (Y) is substantially orthogonal to the longitudinal direction of the stay. One of the advantages of the solution of the invention is to amortize complex relative movements, that is to say movements comprising several components, by a single device mounted between a stay and a component. structural. This avoids the use of several different devices that require a longer assembly and a

clutter that may be problematic in some

configurations of works.

The choice of the viscoelastic material used on the one hand within the first damping system and on the other hand within the second damping system makes it possible to determine the amplitude of the

the damping of the component of the relative movement considered. In this way, it is therefore possible to determine the operating characteristics of the first (second) damping system, such as the value range in intensity, frequency and / or energy of the relative displacement treated by this first (second) system

amortization.

In a civil engineering work, the stay can be for example a tensioned cable fixed at an anchor point to the structural element.

Thus, for example, in such a civil engineering work, the structural element may be a foundation, or a bridge deck or an element of integral structure of a bridge deck, or a roof element

suspended or integral structural element of a suspended roof.

Brief description of the figures

Examples of implementation of the invention are indicated in the description illustrated by the accompanying figures in which: Figure 1 illustrates a first embodiment of the invention showing a perspective damping device,

Figure 2 illustrates a second embodiment of the invention in perspective.

DETAILED DESCRIPTION OF EXAMPLE EMBODIMENTS As can be seen in FIG. 1, the damping device 100 according to the first embodiment is mounted in this example between a cable 20 or guy and a structural element 30. for example a foundation, a slab, the deck of a suspension bridge or a piece mounted on such an apron. The stay can be linked to a pylon (not shown).

At the level of the stay 20, the damping device 100 is mounted for example by a sleeve 101 enclosing the stay 20 forming a first anchor point A1. The sleeve 101 is connected to the stay. The damping device is therefore linked to the stay, and can thus be fixed relative to the stay, able to slide longitudinally along the stay, or able to pivot relative to this stay, for example around the Z axis tangential to the stay or an X or Y axis perpendicular to the stay.

At the level of the structural element 30, the device

100 is mounted for example by a mounting lug 102 welded or riveted to the structural element 30 forming a second point anchor A2. A pivotal connection to the structural member 30 may also be envisaged.

The damping device 100 thus connects the first anchor point A1 to the second anchor point A2 in a first direction X corresponding to the longitudinal direction or principal direction of the damping device 100. In this arrangement, a second direction (Z) is defined by the stay 20, and is orthogonal to the first direction (X). We also define a third direction (Y)

orthogonal to the first direction (X) and the second direction (Z). In practice, the plane (X, Y) containing the first direction (X) and the third direction (Y) corresponds to the plane normal to the tangent of the stay 20 at point A1. Typically, the stay is subjected to movements of greater amplitude in this X-Y plane than in the second direction (Z).

In this first embodiment illustrated in FIG. 1, the damping device 100 consists of a first system

damping device 1 10 located in the portion of the damping device 100 adjacent to the stay 20 (upper portion damping device 100 in FIG. 1) and a second damping system 120 located in the portion of the device damping 100 adjacent to the structural member 30 (lower portion of the damping device 100 in Figure 1). As will be explained in detail below, the first damping system 1 10 here makes it possible to absorb and damp the translation component between the stay 20 and the structural element 30 in the first direction X, for example slow movements or oscillations along the X axis. The second damping system 120 makes it possible to absorb and damp the movements of the cable along the Y axis, by projecting them in the form of rotation around it. the Z axis of a part

intermediate 103 relative to the rest of the assembly 120. This second damping system also damps slow relative movements or vibrations at higher frequency. The intermediate piece 103 is therefore able to move both with respect to the stay 20 and with respect to the structural member 30. This intermediate piece constitutes a first end of each of the two damping systems 1 10, 120 , which are therefore placed in series. In this example, the intermediate piece 103 is common to the first damping system 1 10 and the second system

damping 120 that connects.

The intermediate piece 103 may constitute for example a piston-type element capable of sliding along the axis X in a cylinder-type element of the first damping system 1 10. A viscoelastic fluid in this cylinder, for example a gel or an oil under pressure, opposes this displacement thus damping the movements of the stay along the X axis. The damping force is generated by viscous losses when the fluid is forced to move by a passage of calibrated section when moving the piston. The piston stroke can be for example 50 to 1000 mm in order to damp displacements of large amplitude. The maximum damping force can be for example between 1 kN and 200 kN.

The intermediate piece 103 may also constitute a piston of the second damping system 120, pivotable about the axis R substantially parallel to Z in a cylinder or a base within the system 120, for example of the manner indicated in the document FR 2 664 920. In the same way as in the first system

damping, a viscoelastic fluid in this cylinder opposes the movements of this piston and thus dampens the rotations of the second damping system around the axis R, and thus the translations of the stay along the Y axis.

It is also possible to provide two damping systems 1 10, 120 in series which use two separate pistons rather than a common part 103. Moreover, it is possible to reverse the position of the cylinder and the piston in one of the damping systems, or in both damping systems. For example, the first damping system could comprise a piston connected to the stay 20 and a cylinder connected to the intermediate point 103. The second system

of damping could comprise a piston connected to the structural element 30 and a cylinder connected to the intermediate point 103. The two systems

damping 100, 1 10 can be interconnected by an articulated connection, for example a pivot.

Guiding elements not shown may be provided to allow the intermediate part 103 a relative displacement with respect to the stay 20 which is not purely constituted by a translation along the axis X; a limited amplitude translation along the Y axis, or even a limited angle rotation around the Z axis, are possible.

In the same way, guide means of the workpiece

intermediate 103 with respect to the structural element 30 allow a limited freedom of translation and / or rotation of the intermediate part 103 with respect to the structural element 30.

With these guide elements at each level

articulation, the movement movement components of the stay 20 relative to the structural member 30 which must not be damped are left free or restricted by mechanical links of low stiffness. Typically, the force, respectively the torque, necessary for a displacement along an axis other than that to be damped is of the order of 1 to 15% of the force, respectively the torque, necessary for a displacement of 3 to 500 mm, or 1 ° to 1 5 °, depending on the damped direction. With such an arrangement, the damping device 100 according to the invention can accept translational movements along the X axis of large amplitude while the known friction external dampers are usable up to values of movements according to the invention. the X axis of the order 50 ° mm (millimeters) beyond and below the average position. Thus, the damping device 100 according to the invention makes it possible to dampen a vertical movement of the cable 20 beyond 50 ° mm, for example up to 500 ° mm, even up to 700 mm or up to 1000 ° mm, or even beyond.

With such an arrangement, the damping device 100 can further accept rotational movements of the intermediate part 103 along the axis R with an angle of sufficient value to compensate for large amplitudes of displacement of the stay according to the second Y direction. In one example, the maximum angle of rotation is of the order of + -1 5 ° with respect to the average position, ie an angular deflection of 30 °. Depending on the length of the components, this displacement makes it possible to compensate for a translational component of the cable in the second direction of the order of -500 ° mm to + 500 ° mm). Angles of 10 ° (angular deflection of 20 °), 25 ° (angular deflection of 50 °) °, or even up to 30 °

(angular deflection of 60 °) can also be considered, as well as different maximum amplitudes according to the direction relative to the rest position.

It is understood that the displacement movement of the stay 20 can be decomposed into three elementary translational movements respectively in the first direction X, the second direction Z and the third direction Y. The rotational movements of the stay are generally much more weak and can usually be neglected. The three components of translation, and the possible ones

rotational components, are damped thanks to the three movement components allowed respectively by the first system

damping element (component in translation in the first direction X), the second damping system (component in rotation about the axis R to compensate for the elementary movement in the third direction Y). Thus, the X translation component of the cable is damped

essentially by the first damping system, while the Y translation component (perpendicular to X and the cable) is essentially damped by the second damping system. The Z translation component of the cable is generally much smaller than the X and Y components. The damping device described above therefore comprises a first element 1 13 integrally bonded to the first structural element 20, a second element 123 integrally bonded to the second structural element 30, and an intermediate part 103 adapted to translate along an axis. linear relative to the first element 1 13, and pivotable about an axis relative to the second element 123. Guide means of the intermediate part 103 relative to the first element 1 13 allow a limited freedom of translation according to the Y and / or Z axis and / or rotation of the intermediate piece 103 relative to the first element 1 13. The intermediate piece can also be replaced by different components assembled or hinged together.

Additional degrees of freedom may be provided. For example, the first damping system 1 10 may be free in rotation and / or in translation relative to the stay 20. In the same way, the second damping system 120 may be free to rotate and / or translate by to the structural element 30. Systems

Additional damping devices may be connected in series with the first or second damping systems 110, 120 to dampen other displacement components. Parallel damping systems with any of the first or second damping systems 110, 120 may also be considered in case of large forces or torques.

We now turn to a second embodiment shown schematically in Figure 2. This damping device 1 10 takes some of the provisions of the damping device 1 10 so that the elements common to these two modes of realization bear identical reference signs.

In this embodiment, the first damping system 1 10 is constituted by a viscoelastic damper connected by an articulated connection 160 to a sleeve 101 mounted on the stay 20. This first damping system 1 10 extends along the X axis perpendicular to the tangent of the stay in the direction of the structural member 30. It thus damps the movements and vibration of the stay 20 along this axis X. In the example shown, the first damping system comprises a viscoelastic piston-cylinder assembly with a piston 1 10A linked to

the hinge 160 and a cylinder 1 10B hingedly connected by the link 300 to the structural member 30. It is also possible to reverse this arrangement and to bind the cylinder to the stay by placing the piston on the side of the element In addition, it is possible to provide a first damping system 1 10 without articulated connection with the structural member 30. [0065] The second damping system 120 comprises in this example two piston-piston assemblies mounted in triangle. One end of each cylinder piston assembly 120 is hingedly connected via the pivoting hinge 140 to the flange 170 mounted on an intermediate point of the first damping system, for example near the end of the piston side cylinder 1 10B. 10A. The other end of this assembly is articulately connected via the pivoting joint 150 to the structural member 30. In this example, one of the piston-cylinder assemblies 120 is mounted on the structural member 30 on one side of the assembly.

the hinge 300 while the other piston-cylinder assembly 120 is mounted on the structural member 30 on the other side of the hinge 300; the

layout therefore forms a triangle. In the illustrated example, the two sets of cylinder pistons 120 are mounted with the piston 120A on the side of the structural element 30 and the cylinder 120B on the side of the flange 170; however, it is possible to reverse this structure. The first damping system 1 10 can pivot around the hinge 300 so as to follow the movements of the stay along the Y axis (the Y axis being perpendicular to the stay and the longitudinal axis X) . The second damping system 120 makes it possible to damp these displacements. In fact, the rotations of the first damping system 1 10 cause compression of one of the piston-cylinder assemblies 120 and an extension of the other assembly, to which the viscoelastic fluids are opposed in the cylinders 120B. It is also possible in the context of the invention to provide a third damping system, for example at the hinged connection between the first damping system 1 10 and the sleeve 101.

The present invention also relates to a civil engineering structure with a stay 20 which is mounted on the structural member 30 at the location of an anchor point, the damping device 100 being mounted between said stay 20 and the structural member 30 away from said anchor point. This type of arrangement corresponds to a damper called "external damper" as opposed to other types of dampers, so-called "internal dampers" integral part of the stay or concentric around this stay, as in the document EP1035350.

Reference numbers used in the figures

20 Hauban

30 Structural element (foundation)

X First direction

Z Second direction

Y Third direction

101 Sleeve

1 10 First damping system

1 10A Piston first damping system

1 10B Cylinder of the first damping system

120 Second damping system

120A Piston of the second damping system

120B Cylinder of the second damping system

130 Third damping system

131 Axis of rotation according to Y (material axis)

140 Third pivot joint

1 50 Second pivoting joint

160 Articulated connection on the sleeve

170 Bride

300 First pivoting joint

Claims

claims

1. A viscoelastic damping device for damping the relative movements between a stay (20) and a structural member (30) of a civil engineering work, comprising: a first damping system (1 10) acting primarily to damp a first component relative displacement between said stay (20) and said structural member (30), a second damping system (120) acting primarily to damp a second relative displacement component between said stay and said structural member, the first control system; with the second damping system (120) being in series, at least one of the damping systems (1 10, 120) comprising a viscoelastic damping fluid.

2. damping device according to claim 1, wherein the first damping system (1 10) comprises a first fixed element relative to the stay (20), a second element able to move in translation relative to the first element according to a direction

perpendicular to the stay, and a said viscoelastic damping fluid between the first and the second element,

said first relative displacement component being constituted by a first translation in a first direction (X) extending between said stay (20) and said structural member.

The damping device according to claim 2, wherein said second member is a cylinder, wherein said first member is a piston sliding in said cylinder, and wherein said viscoelastic damping fluid is disposed so as to to oppose the movement of said piston in said cylinder.

4. damping device according to one of claims 1 to 3, wherein the second damping system (120) comprises a third element, a fourth element adapted to pivot relative to the third element about an axis of rotation ( R) substantially parallel to the stay, and a said viscoelastic damping fluid between the third and fourth members,

said second component of relative displacement being constituted by a second translation in a third direction (Y)

perpendicular to the stay and different from the first direction (X).

5. A damping device according to one of claims 1 to 3, wherein the second damping system (1 10) is connected by a

pivoting joint (140) to the first damping system.

6. damping device according to one of claims 1 to 3, wherein the first damping system (1 10) is connected by a first pivoting joint (300) to said structural member (30),

and wherein the second damping system (120) has an end connected by a second pivoting joint (1 50) to said structural member (30), and a second end connected by a third pivoting joint (140) to an intermediate point of the first damping system, so as to exert a force opposing the rotation of the first damping system (1 10).

7. damping device according to claim 6, the second damping system (120) comprising two piston assemblies (120A) -cylinder (120B),

the first piston-cylinder assembly comprising a cylinder (120B) connected by a third pivoting joint (140) at an intermediate point of the first damping system, and a piston (120A) connected by a said second pivoting joint (150) to said element structural member (30) on a first side of the first pivoting joint (300);

the second piston-cylinder assembly comprising a cylinder (120B) connected by a third pivot joint (140) at an intermediate point of the first damping system, and a piston (120A) connected by a said second pivotal joint (150) to said structural member (30) on the other side of the first pivotal joint (300).

8. damping device according to claim 6, the second damping system (120) comprising two piston assemblies (120A) -cylinder (120B),

the first piston-cylinder assembly comprising a piston connected by a third pivoting joint (140) at an intermediate point of the first damping system, and a cylinder connected by a said second pivoting joint (1 50) to said structural element (30) d a first side of the first pivoting joint (300);

the second piston-cylinder assembly comprising a piston connected by a third pivoting joint (140) at an intermediate point of the first damping system, and a cylinder connected by a said second pivoting joint (1 50) to said structural element (30) of the other side of the first pivoting joint (300).

9. damping device according to one of claims 4 or 6 to 8, said second relative displacement component being projected into said device according to said rotation, said rotation being performed about an axis (R) substantially parallel to the second direction (Z).

10. damping device (100) according to one of claims 1 to 9, characterized in that it further comprises a third system

damping device for damping a third relative displacement component between said stay (20) and said structural member (30) in which the first damping system (1 10), the second damping system (120) and the third damping system are placed in series, and wherein the third relative displacement component is different from the first relative displacement component and the second relative displacement component.

1 1. Damping device (100) according to one of claims 1 to 10, characterized in that the second damping system comprises two sets of cylinder pistons triangle.

12. Civil engineering work comprising a stay (20) and a structural member (30) supported by said stay, characterized in that it comprises at least one damping device (100) according to any one of the preceding claims.

13. Civil engineering work according to the preceding claim, characterized in that said structural element (30) is a foundation, or a bridge deck or a suspended roof.