WO2023148792A1 - Dispositif amélioré pour la consolidation et la protection antisismique de bâtiments en maçonnerie - Google Patents

Dispositif amélioré pour la consolidation et la protection antisismique de bâtiments en maçonnerie Download PDF

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Publication number
WO2023148792A1
WO2023148792A1 PCT/IT2022/000009 IT2022000009W WO2023148792A1 WO 2023148792 A1 WO2023148792 A1 WO 2023148792A1 IT 2022000009 W IT2022000009 W IT 2022000009W WO 2023148792 A1 WO2023148792 A1 WO 2023148792A1
Authority
WO
WIPO (PCT)
Prior art keywords
enclosure
tie rod
structural element
box
wall
Prior art date
Application number
PCT/IT2022/000009
Other languages
English (en)
Inventor
Delia D'ARRIGO
Linda Giresini
Fabio SOLARINO
Original Assignee
Licord Spa
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 Licord Spa filed Critical Licord Spa
Priority to PCT/IT2022/000009 priority Critical patent/WO2023148792A1/fr
Publication of WO2023148792A1 publication Critical patent/WO2023148792A1/fr

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/027—Preventive constructional measures against earthquake damage in existing buildings
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
    • E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
    • E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
    • E04H9/0235—Anti-seismic devices with hydraulic or pneumatic damping
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/35—Extraordinary methods of construction, e.g. lift-slab, jack-block
    • E04B2001/3583—Extraordinary methods of construction, e.g. lift-slab, jack-block using permanent tensioning means, e.g. cables or rods, to assemble or rigidify structures (not pre- or poststressing concrete), e.g. by tying them around the structure

Definitions

  • the present invention relates to a device for the consolidation and antiseismic protection of masonry buildings.
  • the invention refers to an anchoring device for the consolidation and antiseismic protection of masonry buildings that can be associated with a tie rod or chain of the known type suitable for binding the tie rod to the masonry and for appropriately transmitting the stresses from one to the other.
  • said device can no longer be removed without totally cancelling the axial stress on the chain or tie rod, hence dangerously altering the constraint conditions of the existing construction. This significantly limits the possibility of performing maintenance or control operations on the device.
  • the device in question protrudes externally with respect to a relative anchor plate in the wall, so that when the thickness is not great enough to make a cut in the wall of sufficient depth, it will protrude a certain amount outside the wall, considerably increasing the visibility of the device and therefore the aesthetic invasiveness of the consolidation work.
  • a purpose of the present invention is to propose an anchoring device associable with a tie rod or chain for the consolidation and antiseismic protection of masonry buildings that exceeds the above-mentioned limits of the prior art.
  • a main purpose of the invention is to propose a device for anchoring a tie rod or chain to a wall of a masonry building that makes possible an effective and homogeneous distribution of the stresses transmitted by the tie rod or chain to a large surface of the wall.
  • Another purpose is to propose a device for anchoring a tie rod or chain to a wall of a masonry building that, by avoiding protrusion from the plane of the wall, has a minimal aesthetic impact.
  • a further purpose of the present invention is to propose a device for anchoring a tie rod or chain to a wall of a masonry building comprising viscoelastic damping members adequately protected from moisture and other external agents.
  • Yet another purpose of the present invention is to propose a device for anchoring a tie rod or chain to a wall of a masonry building that can be disassembled and removed for maintenance or inspection without altering the stresses imposed on the wall and without damaging it.
  • the foregoing and other purposes are achieved by means of an anchoring device for the consolidation and/or antiseismic protection of masonry buildings, designed to anchor a tie rod or chain to a wall of a pair of walls facing each other to prevent them from increasing their distance from each other, pursuant to claim 1.
  • FIG. 1 shows, in a schematic lateral sectional view, an anchoring device according to the present invention in an operating configuration installed on the wall of a masonry building;
  • Figures 2 and 3 show a component of the device of Figure 1 respectively in a front view and in an axial sectional view similar to that of Figure 1 ;
  • Figures 4 and 5 show a component of the device of Figure 1 respectively in a front view and in an axial sectional view similar to that of Figure 1 ;
  • FIG. 6 and 7 again show a component of the device of Figure 1 respectively in a front view and in an axial sectional view similar to that of Figure 1 ;
  • FIG. 8 shows, in an enlarged side view in partial section, a further component of the device of Figure 1 ;
  • FIG. 9 shows, in enlarged lateral side section view, yet another component of the device of Figure 1 ;
  • FIG. 10 shows the device of Figure 1 in four different operational phases of temporary removal of several components from the wall in which it is installed.
  • an anchoring device according to the present invention is collectively referred to as 1 .
  • the anchoring device 1 comprises a box-like enclosure 10, to be housed in an opening of said wall W and to be stably associated with it by means of suitable constraint means 11 , so as to be able to transmit to said wall W at least those stresses orthogonal to it.
  • the box-like enclosure 10 comprises a bottom opening 12 in an end wall 13.
  • the bottom opening 12 is adapted to allow the passage of the tie rod T which, in the configuration in which it is used, has its end inside the box-like enclosure 10.
  • the box-like enclosure 10 comprises at least one shot plate 14 parallel to the end wall 13 and located at an axial end opposite the latter, protruding radially with respect to the main body of said box-like enclosure 10.
  • the shot plate 14 is therefore adapted to abut the outer side of the wall W to transmit to the latter the tensile force exerted by the tie rod T.
  • the shot plate 14 can abut the existing outer surface of the wall W, as shown in Figure 1 , or a suitable recess may be made in the latter to ensure that the external part of the box-like enclosure 10 is flush with the wall.
  • the constraint means 11 in this embodiment are constituted by a plurality of holes obtained in the shot plate 14 in which fixing members are inserted into the masonry.
  • the box-like enclosure 10 has a front opening 15 of large dimensions to which a closure element 16, which has an axial hole 17, is removably associated.
  • the closure element 16 can be advantageously associated with the main body of the box-like enclosure by means of holes that can be engaged by the same constraint means 11 used to constrain the box-like enclosure 10 to the wall W.
  • the box-like enclosure 10 has an advantageous cylindrical tubular shape and the shot plate 14 is ring shaped.
  • a viscoelastic damping device 20, removably housed inside the box-like enclosure 10, comprises: a first structural element 21 and a second structural element 22, oppositely coupled to each other in a mutually sliding manner, elastic members 23 and viscous fluid energy dissipaters 24, arranged to react to the reciprocal movements of approach and distancing of said first and second opposed structural elements 21 and 22.
  • the viscoelastic damping device 20 is contained in the box-like enclosure 10 oriented in such a way that the first opposed structural element 21 and the second opposed structural element 22 are spaced in the direction of the axis of the tie rod T and mutually movable in the aforementioned axial direction to the tie rod T and in such a way that the first structural element 21 can exert stresses on the inner walls of the box-like enclosure 10 in the direction orthogonal to said wall W and therefore substantially axial to the tie rod T. More precisely, in the embodiment represented the first structural element 21 has the shape of a disk adapted to abut the end wall 13 of the box-like enclosure 10 by exerting stresses on it.
  • a tensioner 30 is provided for connecting the tie rod T to the second structural element 22 of said viscoelastic damping device 20 so that the tensile force exerted by the tie rod T is transmitted to the wall W with the interposition of said viscoelastic damping device 20 and said box-like enclosure 10.
  • the tensile force exerted by the tie rod T is transmitted to the second structural element 22 and transferred to the first structural element 21 by the elastic members 23 and the viscous fluid energy dissipaters 24.
  • the stress appearing at the first structural element 21 is then transmitted to the end wall 13 of the box-like enclosure and, from this, due to the fact that the box-like enclosure is a rigid body, to the shot plate 14, which transfers it to the wall W.
  • the first structural element 21 and the second structural element 22 are connected to each other by coaxial cylinder guide and sliding members 25, which guide the reciprocal movement of said first 21 and second structural elements 22 and constitute mechanical limit switches which define a minimum distance between the first 21 and the second structural element 22.
  • the tensioner 30 comprises: a first abutment element 31 adapted to abut the box-like enclosure 10 to make a stop for limiting the axial movement of said tensioner 30 with respect to said box-like enclosure 10; a second abutment element 32, whose axial distance from said first abutment element 31 is adjustable, said second abutment element 32 being adapted to abut said second structural element 22 of said viscoelastic damping device 20 to make a stop for limiting the axial movement of said tensioner 30 with respect to said second structural element 22; anchoring means 33 adapted to constrain said tensioner 30 to said tie rod T preventing mutual axial sliding thereof; and adjusting means 34 adapted to determine the axial distance between said first abutment element 31 and said second abutment element 32, so that in a first operating configuration said anchoring means 33 axially constrain said tensioner 30 to said tie rod T and said second abutment element 32 abuts said second structural element 22 in such a way that a tensile
  • said first anchoring means 33 axially constrain said tensioner 30 to said tie rod T and said first abutment element 31 abuts said enclosure 10 in such a way that a tensile force exerted on said tie rod T is transferred directly to said enclosure 10 without the interposition of said viscoelastic damping device 20.
  • the first 21 and second structural elements 22 each comprises a respective barycentric opening 26, 27.
  • the bottom opening 12 of the box-like enclosure 10, the barycentre opening 26 of the first structural element 21 , the barycentric opening 27 of the second structural element 22, and the axial hole 17 of the closing element 16, are aligned axially to facilitate the passage of the tie rod T and the tensioner 30, so that said first abutment element 31 and said anchoring means 33 of said tensioner 30 are located between said first structural element 21 and said second structural element 22, while said second abutment element 32 and said adjustment means 34 are located on the opposite side of said second structural element 22 with respect to said first structural element 21 , thus being accessible from outside said box-like enclosure 10.
  • the tensioner 30 consists of an elongated element having a tubular portion 35 and a threaded cylindrical portion 36.
  • the free end of the tubular portion creates the first abutment element 31 , while an internal thread of the tubular portion achieves the anchoring means 33 which allow connection with the threaded end of the tie rod T.
  • the anchoring means 33 can be realised as jaws that grip and clamp the tie rod T.
  • the anchoring means 33 are implemented thanks to flat portions 37 provided in the threaded cylindrical portion 36 which make it possible to use a pliers or a spanner to tighten the tensioner 30 to (or else loosen it from) the tie rod T.
  • suitable members shall be provided which can be actuated at the threaded cylindrical portion 36, not here disclosed as they are already known in the art.
  • An internally threaded nut for mating with the threaded cylindrical portion 36 creates the second abutment element 32 and the adjustment means 34.
  • Constraint means at calibrated strength 40 are provided to connect the second structural element 22 rigidly to the box-like enclosure 10 so that the tensile force exerted by the tie rod T is transmitted directly from the second structural element 22 to the closing element 16 and then to the box-like enclosure 10 and, finally, to the wall W.
  • the constraint means at calibrated strength 40 consist of one or more constraint elements subjected to traction and having predefined tensile strength.
  • the constraint means at calibrated strength 40 consist of a plurality of screws housed in holes formed in the closing element 16 and engaging in threaded holes 28 provided in the second structural element 22 and having a reduced section portion 41 which defines a relatively low predetermined tensile strength.
  • the elastic members 23, consisting of helical compression springs acting right between the first 21 and second 22 structural element are advantageously chosen to have a greater length at rest with respect to the aforementioned said operating distance so that they are pre-compressed when said viscoelastic damping device 20 is in operating configuration.
  • the anchoring device 1 can be advantageously installed where, between two facing walls W of a masonry building, a traditional tie rod T is already installed for consolidation of the structure, avoiding the risk of out-of-plane movements of the walls W.
  • the wall W is prepared by obtaining, in the external surface, a cavity of sufficient width and depth to house the box-like enclosure 10.
  • the cavity may be a through cavity, as shown in Figure 1 , when the thickness of the wall is equal to or less than the depth of the box-like enclosure 10, while it may also be a blind cavity providing a through hole of sufficient diameter to allow the passage of the end of the tie rod T when the thickness of the wall W is greater than the depth of the box-like enclosure 10.
  • the box-like enclosure 10 is then inserted into the cavity of the wall and permanently anchored to the latter by the constraint means 11 .
  • the end of the tie rod, passing through the bottom opening 12 is located inside the box-like enclosure.
  • the tensioner 30 is inserted into the tie rod T until it abuts the element 13.
  • the viscoelastic damping device 20 is then inserted into the box-like enclosure 10 by passing the end of the tie rod T and the tensioner 30 through the barycentric opening 26 of the first structural element 21 until this abuts the end wall 13 of the box-like enclosure 10.
  • the adjustment means 34 i.e.
  • the second abutment element 32 is first brought into contact with the second structural element 22.
  • the closing element 16 is applied and the constraint means at calibrated strength 40 that connect the closing element 16 to the second structural element 22 are inserted.
  • the flat portions 37 of the tensioner 30 can be acted upon by unscrewing it by a certain length.
  • the axial action is then transferred from the tie rod T to the wall W by the constraint means at calibrated strength 40, and no longer by the end wall 13 of the box-like enclosure 10. Finally, the tensile force acting on the tie rod T and the compression of the elastic members 23 are adjusted.
  • the tensile force exerted by the tie rod is transmitted by the constraint means at calibrated strength 40 to the closing element 16 and from this to the wall W through the shot plate 14.
  • the elements subjected to traction acting on the tie rod tend to increase until the limit of tensile strength of the constraint means at calibrated strength 40 is reached, their breakage and the entry into operation of the viscoelastic damping device 20 would occur.
  • the tensile strength of the tie rod T is transmitted to the wall W through the viscoelastic damping device 20 and the end wall 13 of the box-like enclosure 10.
  • the anchoring device 1 described above has several advantages over the prior art.
  • the presence of the box-like enclosure 10 and its configuration solve several problems associated with the prior art.
  • the shot plate 14 guarantees a large surface on which the stresses are distributed on the wall W and on the entire thickness of the wall W.
  • the stresses are discharged directly on the wall face, which is sometimes of reduced thickness due to aesthetic requirements.
  • the viscoelastic damping device 20 is protected from external agents and the entire anchoring device 1 is minimally invasive from an aesthetic point of view, as it is contained completely in the thickness of the wall W.
  • the box-like enclosure 10 and the tensioner 30 make possible the removal of the viscoelastic damping device 20 without altering the constraint conditions of the wall W and without risking damage to the wall W itself.
  • the removal of the viscoelastic damping device 20 can take place starting from the operational configuration of the configuration a) by screwing the tensioner 30 through the flat portions 37 until the first abutment element 31 is brought under pressure on the end wall 13 of the box-like enclosure 10, thus transferring the stresses directly from the tensioner 30 to the box-like enclosure 10, configuration b).
  • the constraint means at calibrated strength 40 and the constraint means 11 are taken away so as to remove the closure element 16, configuration c).
  • the nut that determines the adjustment means 34 and the second abutment element 32 is also removed and, once this has been done, the viscoelastic damping device 20 can be removed from the box-like enclosure 10.
  • the viscoelastic damping device 20 can then undergo maintenance with the box-like enclosure 10 remaining anchored to the wall W and with the tie rod remaining under tensile stress thanks to the action of the tensioner 30 on the box-like enclosure 10.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Environmental & Geological Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

Dispositif d'ancrage (1) pour la consolidation et la protection antisismique de bâtiments en maçonnerie pouvant être associé à une chaîne ou un tirant (T) d'un type connu et adapté pour contraindre le tirant sur la paroi (W) et pour transmettre de manière appropriée les contraintes de l'un à l'autre, comprenant une enceinte en forme de boîte (10) associée de manière permanente à la paroi (W), à l'intérieur de laquelle un dispositif d'amortissement viscoélastique (20) est inséré auquel le tirant (T) est relié au moyen d'un tendeur (30). Des moyens de contrainte à résistance calibrée (40) relient rigidement l'enceinte en forme de boîte (10) au dispositif d'amortissement viscoélastique (20) de sorte que ce dernier n'entre en fonctionnement que lorsque les contraintes dépassent une certaine valeur. Les contraintes sont transmises du tirant (T) à la paroi (W) à travers l'enceinte en forme de boîte (10) et il existe des avantages considérables en lien avec la distribution optimale des contraintes sur la paroi (W), l'impact visuel minimal du dispositif d'ancrage (1), et la possibilité de le retirer sans endommager la paroi (W) et sans modifier l'état de contrainte du tirant (T), etc.
PCT/IT2022/000009 2022-02-03 2022-02-03 Dispositif amélioré pour la consolidation et la protection antisismique de bâtiments en maçonnerie WO2023148792A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2022/000009 WO2023148792A1 (fr) 2022-02-03 2022-02-03 Dispositif amélioré pour la consolidation et la protection antisismique de bâtiments en maçonnerie

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2022/000009 WO2023148792A1 (fr) 2022-02-03 2022-02-03 Dispositif amélioré pour la consolidation et la protection antisismique de bâtiments en maçonnerie

Publications (1)

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WO2023148792A1 true WO2023148792A1 (fr) 2023-08-10

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051322B4 (de) * 2010-11-16 2016-06-16 Desoi Gmbh Vorrichtung zum Spannen und lastkonstanten Halten von Gebäudeteilen
US10041267B1 (en) * 2016-09-02 2018-08-07 State Farm Mutual Automobile Insurance Company Seismic damping systems and methods
IT201800004026A1 (it) * 2018-03-28 2019-09-28 Livith S P A Dispositivo licord per il consolidamento e protezione sismica di edifici in muratura

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010051322B4 (de) * 2010-11-16 2016-06-16 Desoi Gmbh Vorrichtung zum Spannen und lastkonstanten Halten von Gebäudeteilen
US10041267B1 (en) * 2016-09-02 2018-08-07 State Farm Mutual Automobile Insurance Company Seismic damping systems and methods
IT201800004026A1 (it) * 2018-03-28 2019-09-28 Livith S P A Dispositivo licord per il consolidamento e protezione sismica di edifici in muratura

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