FR2530714A1 - DEVICE FOR PROTECTING LARGE-LENGTH BUILDINGS, ESPECIALLY BUILDINGS FOR PENSION PLANTS AND THEIR COMPONENTS AND SYSTEMS - Google Patents

Abstract

THE INVENTION CONCERNS A DEVICE FOR PROTECTING LARGE LENGTH BUILDINGS AGAINST DYNAMIC LOADS EXERCISED FROM THE EXTERIOR, THESE BUILDINGS INCLUDING AN EXTERIOR STRUCTURE WHICH SURROUNDED BY BEING SPACED AN INTERIOR STRUCTURE WITH DAMPING ELEMENTS BETWEEN THE INTERIOR STRUCTURES . IN ACCORDANCE WITH THE INVENTION, THE INTERIOR STRUCTURE IS MOUNTED ON ELASTIC AND DAMPING BODIES 24 PROVIDED BETWEEN THE FOUNDATION PLATE 16 OF THE EXTERIOR STRUCTURE AND THAT 10 OF THE INTERNAL STRUCTURE; THE CHARACTERISTIC OF ELASTICITY AND DAMPING OF THE BODIES 24 BEING CHOSEN SO THAT NO EXCITATION FORCE OF THE OWN FREQUENCY OF THE INTERIOR STRUCTURE AND OF THE OWN FREQUENCIES OF THESE COMPONENTS AND SYSTEMS CAN NOT BE TRANSMITTED TO THE INTERNAL SECTION AND TO THE ITS COMPONENTS AND SYSTEMS. THE INVENTION IS APPLICABLE IN PARTICULAR TO BUILDINGS OF NUCLEAR FUEL TREATMENT FACILITIES.

Description

Device for protecting buildings of great length, especially

  buildings for reprocessing plants

  as well as their components and systems.

  The present invention relates to a device for the protection of buildings of great length, especially buildings for

  reprocessing plants and their components and systems

  against dynamic influences resulting from an external action, comprising an outer structure which encloses a certain distance an internal structure as well as damping elements placed between the inner and outer structures

  DE 624,955 discloses a device for the protection of

  building against vibration, which uses

  insulating elements which are placed in a horizontal joint between a lower part and an upper part of the building The insulating elements comprise a housing consisting of telescopically assembled parts and between which are arranged removable elastic shims, which are for example in the form of springs or plates of cork or rubber This known device obviously offers some protection against the effects produced by earthquakes but not however in the case of the fall of an airplane and against other influences soliciting the party

superior building.

  DE 2 835 877 discloses a device for protecting a

  Atomic power station against shock effects, this device

  laying between the support structure of the transport castle or safety tank of the nuclear reactor and the foundation, a

  elastically deformable connection. The support structure penetrates

  be inside a foundation arranged in the shape of basin.

  Between the foundation and the supporting structure, there are shock absorbing elements in the form of shock absorbers and elastic hoses filled with

  of liquid to support floating the castle of trans-

  port The transport castle is also surrounded by a

  protective liner providing protection against repercussions

  the result of the fall of an airplane This known device does not allow

  not enough to dampen oscillations by reso-

  nance and acceleration forces.

  Devices, apparatus and machines placed in the

  the building are only inadequately protected.

  The invention aims to create a device according to the above and which is arranged to avoid overloads of the internal structure and its components and systems by accelerations resulting from influences exerted from the outside. device must be able to be manufactured in such a way

  simple and as inexpensive as possible.

  This problem is solved according to the invention in that the structure

  interior is mounted on elastic and shock absorbing bodies.

  which are placed between the foundation plate of the structure

  outer wall and the foundation plate of the structure

pool.

  Thanks to the arrangement according to the invention, the structure

  is arranged in the outer structure so that

  influences from the outside are effectively

  Elastically and dampened thoughts Overloading the structure

  interior and its components and systems can not be

  can no longer be generated by external forces of accelera-

  The solution of the problem according to the invention is further characterized in that the protection of buildings for reprocessing installations can be ensured in a manner

expensive.

  According to another characteristic of the invention, the characteristic

  The elastic and damping bodies are selected or can be adjusted in such a way that no force, which would give rise to excessive excessive oscillations at the natural frequency of the inner structure and its components and systems, can be transmitted to the internal structure. and to the components and systems of this structure that are placed in different

  With this arrangement, it is prevented that the structure

  It may be subject to external influences which may subject the internal structure and its components and systems to excessive excessive vibration. According to another advantageous feature of the invention, the

  outer structure is arranged in a foundation casing.

  According to other features of the invention

  a) the elastic and damping bodies are fixed on different

  different independent projections in the form of blocks or on

  independent rows of projections, oriented longitudinally

  nally and / or transversely of the foundation plate of the external structure; (b) the distance between the blocks or rows of protrusions and the distance between the foundation plates are chosen to be set up, for inspection and

  maintenance of elastic and damping bodies,

  of sufficient width and height in which machines can be moved to replace the various elastic and damping bodies; c) on a projection are arranged two rows of elastic bodies

and depreciation.

  Thus the maintenance and inspection of the body of elastic

  ticks and damping according to the invention are consid-

  facilitated by appropriate machinery, such as forklifts, which can move around

  the passages between the elastic and damping bodies

  it is easy to carry out, if necessary, the replacement

  cement different elastic bodies and damping.

  According to another feature of the invention, provision is made

  the walls and roofs of the inner structure and the outer structure a spacing gap which corresponds at least to the maximum capacity of deformation of the wall or

  roof of the external structure under an external influence.

  This ensures that forces that cause deformation of the wall or roof of the external structure can not

  transmitted to the inner structure and its components.

and systems.

  Other features and advantages of the present invention

  will be highlighted in the following description given to

  As a nonlimiting example and made with reference to the accompanying drawings in which: Figure 1 shows a section of a building arranged according to the invention for installationsade reprocessing; Figure 2 is a plan view of the elastic bodies arranged and placed in accordance with the present invention; Figure 3 is a section of a part of the building where are set up elastic bodies. In the drawings, identical parts have been designated by

the same references.

  The drawing shows a building 2, consisting of an inner structure 4 and an outer structure 6 enclosing the inner structure 4 at a certain distance.

  placed by its lower part in a foundation casing 8.

  The inner structure 4 comprises a foundation plate 10, walls 12 and a roof 14 while the outer structure 6

  comprises a foundation plate 16, walls 18 and a roof 20.

  In the interior structure 4 are arranged different

  systems and systems 22 in the different plans for

  reprocessing of nuclear fuels.

  The inner structure 4 is mounted in the outer structure 6 by means of elastic and damping bodies 24 The elastic and damping bodies 24 are only arranged between

  the two foundation plates 10 and 16 spaced apart from each other.

  They can be adjusted or adjusted with regard to their

  characteristics of elasticity and damping so that oscillations of high frequency (about 40 Hz), caused for example by a plane crash, are absorbed by them then

  oscillations at low frequencies (approximately 2 to 10 Hz),

  evoked for example by an earthquake and for which several shocks can successively occur at the natural frequency of the internal structure and components and systems,

  and which could oscillate at their own frequency the structure

  4 and the components and systems 22, are absorbed by the plastics and damped so that these oscillations

can not be generated.

  The arrangement and arrangement of the elastic and cushion bodies

  24 and also the foundation plate 16 have been re-

  FIGS. 2 and 3 show the resilient and damping bodies 24 supported on one side by means of spring cups 26 on the foundation plate 10.

  of the inner structure 4 and on the other side, through

  spring-bowl projections 28, on spaced-apart projections in the form of blocks or on rows spaced from projections 30, oriented longitudinally and / or transversely, of the plate

  foundation 16 of the outer structure 6.

  Between the projections are left passages 32 whose width and useful height between the base of the passage 34 and the plate of

  foundation 10 are chosen so that machines, for example

  forklift trucks, can move

  in the passages for the replacement of certain elastic bodies

  The passages may for example have a width of 7 meters and a useful height of 2.50 meters. The height of the projections may for example be 1.50 meters and the height of the elastic and damping bodies may to raise to 1 meter The prediction of the passages between the projections facilitates considerably the inspection and the maintenance of the elastic bodies

and depreciation.

  On the protrusions 30, advantageously, respectively, not more than two rows of elastic and damping bodies are provided,

  so that all elastic and damping bodies are made

accessible cabling.

  The elastic and damping bodies 24 consist of a

  elastic body 36 and a damping body 38 In the example

  shown, the damping body 38 is housed in the

  elastic body 36 The damping bodies and the elastic bodies

  ticks can also be arranged separately.

  As elastic bodies, it is advantageous to use helicoidal springs sized accordingly-whereas, as the damping body, the so-called

  viscous dampers The elastic bodies and the amorphous bodies

  the elastic bodies and the separately arranged damping bodies are fixed on

  10 and 16 using screws (not shown).

  seems elastic bodies and damping bodies is effective as well for vertical acceleration forces

-5 than horizontal.

Claims (6)

claims   1 Device for the protection of buildings of great length, in particular buildings for reprocessing installations and their components and systems, against dynamic influences of an external action, comprising an external structure which envelopes at a certain distance an internal structure as well as damping elements placed between the inner and outer structures, characterized in that the inner structure (4) is mounted on elastic and damping bodies (24), which are placed between the foundation plate (7) of the external structure (6)   and the foundation plate (10) of the inner structure (4).   2 Device according to claim 1,   characterized in that the characteristic of the elastic bodies and.   damping element (24) is selected or can be adjusted in a manner   that no force that would generate excessive oscillations -   incorrect to the natural frequency of the inner structure and   components and systems can not be transmitted to the   (4) and to the components and systems (22) of this   structure that are placed in different planes.   3 Device according to any one of claims 1 and 2,   characterized in that the outer structure (6) is arranged   in a foundation casing (8) -   4 Device according to any one of claims 1 and 2,   characterized in that the resilient and damping bodies (24) are fixed on different independent projections in the form of blocks or on independent rows of projections (30) oriented longitudinally and / or transversely of the plate   foundation (16) of the outer structure (6).   Device according to claim 4, characterized in that the distance between the blocks or the rows   protrusions (30) and the distance between the   (10 and 16) are chosen so as to constitute, in order to   inspection and maintenance of elastic bodies and cushioning   the passageways (32) of sufficient width and height   in which machines can be moved.   replacing the different elastic bodies and damping (24).   Device according to any one of claims 4 and 5,   characterized in that on a projection (30) are disposed two   rows of elastic and damping bodies (24).   7 Device according to any one of claims 1 and 2,   characterized in that there is provided between the walls (12 and 18) and the roofs (14 and 20) of the inner structure (4) and the   outer structure (6) a spacing interval corresponding to   at least the maximum deformation capacity of the wall (18) or the roof (20) of the outer structure (6) under a external influence.