WO2022243589A1 - Système de connexion structurelle à postériori et procédé de connexion de structures au moyen de ce système - Google Patents

Système de connexion structurelle à postériori et procédé de connexion de structures au moyen de ce système Download PDF

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Publication number
WO2022243589A1
WO2022243589A1 PCT/ES2022/070296 ES2022070296W WO2022243589A1 WO 2022243589 A1 WO2022243589 A1 WO 2022243589A1 ES 2022070296 W ES2022070296 W ES 2022070296W WO 2022243589 A1 WO2022243589 A1 WO 2022243589A1
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WO
WIPO (PCT)
Prior art keywords
concrete
support
existing
screw
repaired
Prior art date
Application number
PCT/ES2022/070296
Other languages
English (en)
Spanish (es)
Inventor
Carles COTS COROMINAS
Original Assignee
Concrete Rehabcco Slp
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 Concrete Rehabcco Slp filed Critical Concrete Rehabcco Slp
Publication of WO2022243589A1 publication Critical patent/WO2022243589A1/fr

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Classifications

    • 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
    • E04G23/0203—Arrangements for filling cracks or cavities in building constructions
    • E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • 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

Definitions

  • connection system understood as a set of elements, which, essentially comprising a support in the form of a plate and a retractable screw inserted flush into it, is intended to allow power carry out the subsequent joining of structural elements, that is, existing elements, particularly reinforced, post-stressed or mass concrete structures, with a new reinforcing structure, which can be metallic or mixed or made of other materials, normally for the repair or rehabilitation of the existing structure, a second aspect of the invention being a connection method to carry out said connection between said structures using said connection system.
  • rehabilitation can be considered based on complementing the original structure with resistant additions that allow the extension of its useful life.
  • rehabilitations are:
  • the subsequent connection is usually made with different types of connectors, among which we can mention stud type connectors, T connectors and others.
  • the method used up to now is analogous to all types of connectors and consists of the demolition of the alveoli for the location of the connectors, the welded placement of the connectors in the alveoli connecting them The metal structure and the filling of the alveoli with a matrix with characteristics superior to those of the existing concrete.
  • the objective of the present invention is the development of a connection system and method between said existing structures to be repaired or reinforced and the structures or reinforcement elements improved in several aspects, especially in its adaptability to all types of structures, with or without armor.
  • Patent JP2011202419A referring to a "STRUCTURE AND METHOD FOR JOINING SHAFT MEMBER AND RC MEMBER" which, unlike the system object of the present invention, is not a reinforcement support for the original concrete structure.
  • connection system or set of connection elements, which, essentially comprising a support in the form of a plate and a screw inserted in said plate in a retractable manner, has as purpose to allow to carry out the union of an existing structural element, which can be reinforced concrete, post-tensioned or in mass, with a new reinforcement structure, which can be metallic or mixed, for example for the repair or rehabilitation of the existing structure, a second aspect of the invention being a connection method to carry out said union between said structures using said connection system .
  • the a posteriori structural connection system object of the invention essentially comprises a support in the form of a plate, belonging to the new reinforcement structure, and at least one screw threaded to said support in a threaded hole. provided for this purpose, in such a way that the tip of the screw shank can be retracted and placed at different heights with respect to the support plate maintaining a near zero clearance between the screw and the support, since such near zero clearance is essential so that the support acts as structural reinforcement of the damaged concrete structure to be repaired.
  • the method of connecting existing concrete structures with new structural reinforcements by using the previously described connection system essentially comprises the following stages:
  • the screw is retractable, that is, that it can be retracted with respect to the plate, is important in order to be able to adapt to the shape of the alveolus generated, which sometimes exposes the reinforcement (in the case of reinforced concrete). , which prevents moving the screw towards the interior of the alveolus.
  • the screw or screws of the connection system support can enter the alveolus in a direction perpendicular to the plate or with another azimuth and thus avoid running into the reinforcement.
  • the method comprises a stage of provisionally fixing the support of the connection system to the concrete structure to be repaired in order to keep the plate in the desired position while the other stages are executed.
  • This fixing is not the one that will offer structural resistance.
  • the described method has the advantage that a structure can be repaired in stages with it. For example a beam.
  • the support is placed along the entire length of the structure to be repaired with the screws retracted. Since it is not possible to make an alveolus in the entire area to be repaired because the structure is at risk, a first alveolus is made only in a small part, the screws corresponding to said part are screwed in, and concrete is poured with restitution material. Once dry, a second alveolus is made in the area adjacent to the first one, the screws corresponding to this new position are screwed in, the alveolus is concreted, and so on until the entire extension of the support is covered.
  • the restitution of the material removed to generate the alveolus in the existing concrete structure to be repaired can be done using micro-concrete, mortars, resins or grouts, in any case, such that they restore the same or greater resistance capacity that it had. the original concrete.
  • the threaded screw can be made of any material deemed appropriate.
  • the demolition or removal of material to generate the alveolus in the structure to be repaired can be carried out by any conventional method such as chipping, drilling, controlled explosion or another method, although, as previously indicated, Preferably, it will be by hydrodemolition.
  • connection system and method of the invention is designed for on-site execution, it can also be carried out in a prefabrication workshop for the rehabilitation of prefabricated structures.
  • the problem to be solved is to prolong the useful life of pre-existing structures and/or increase their resistance capacity through the joint work connection of said pre-existing structure and a new reinforcement addendum structure.
  • figure number 1 a.- Shows a schematic view in elevation and section of a stud-type connector in composite beams of bridges or buildings, as an example of the prior art
  • Figure number 1 b.- Shows a schematic view in elevation and section of a T-type connector in composite beams of bridges or buildings, as an example of the prior art
  • Figure number 1 c.- Shows a set of different types of connectors, according to the prior art
  • Figure number 2.- Shows a schematic view in elevation and section of an example of a structure to be rehabilitated and an example of the connection system object of the invention with the elements it comprises represented separately
  • Figures number 3-A, 3-B, 3-C, 3-D and 3-E.- Show, in respective schematic elevation and section views, the successive essential stages of the connection
  • FIG 1-A an example of the use of a stud-type connector (a) for joining an existing structure (1) with a reinforcing structure (4) is observed.
  • FIG 1-B An example of the use of a T-type connector (b) is observed, also represented from the front and in profile, for joining an existing structure (1) with a reinforcing structure (4).
  • FIG 1-C different types of connectors (c) are observed, also according to the prior art,
  • connection system object of the invention applicable for joining an existing concrete structure (1) to be repaired, which may or may not be reinforced concrete, with a structure supplementary reinforcement (4), which can be metallic or mixed, essentially comprising a support (3) in the form of a plate, incorporated into the reinforcement structure (4), and at least one screw (2) threaded to said support (3) in a threaded hole (3a) provided for this purpose in the plate constituting the support (3), in such a way that the tip (2a) of! screw stem (2) can be retracted and positioned at different heights with respect to the support plate (3) maintaining a clearance close to zero between the screw (2) and the support (3).
  • a structure supplementary reinforcement (4) which can be metallic or mixed, essentially comprising a support (3) in the form of a plate, incorporated into the reinforcement structure (4), and at least one screw (2) threaded to said support (3) in a threaded hole (3a) provided for this purpose in the plate constituting the support (3), in such a way that the tip (2a) of! screw stem (2) can be re
  • the screw (2) can be metallic, or made of reinforced polymer with or without fibers of any type or ceramic.
  • the support plate (3) is preferably a metallic or fiber-reinforced polymer sheet of any type, belonging to and integral with the supplementary reinforcement structure (4).
  • connection method of the existing concrete structure (1) with the supplementary reinforcement structure (4) by means of the described connection system essentially comprises the following stages:
  • the screw (2) or screws of the support (3) of the connection system can penetrate the alveolus (5) in a perpendicular direction to the plate of said support (3) or with another azimuth and to avoid running into the armor that, in In the case of reinforced concrete, it can present said alveolus (5).
  • the method comprises a stage of provisional fixing of the support (3) to the existing concrete structure (1) to be repaired to maintain the plate in the desired position while the other steps are executed.
  • the restored material (6) that is incorporated instead of the removed material to generate the alveolus (5) in the existing concrete structure (1) to be repaired can consist of micro concrete, mortars, resins, such as to restore equal to or greater than the resistance capacity of the original concrete and are compatible with said concrete.
  • the removal of material to generate the alveolus (5) in the existing structure (1) to be repaired can be carried out by hydrodemolition or another conventional method such as chipping, drilling, controlled explosion.
  • the method can be executed repetitively in some stages to repair an existing structure (1), for example a beam, in a staggered manner, in such a way that, after the stage of placing the support (3) along the entire length of the existing structure (1) to be repaired with the screws (2) retracted, a first alveolus (5) is made only in a small part, the screws (2) corresponding to said part are threaded, concrete is poured with restitution material and, once hardened, a second alveolus is made (5) in an area adjacent to the first one, the screws (2) in said area are screwed in, the alveolus (5) is concreted, and so on until the entire extension of the support (3) is covered.
  • Figures 4-A, 4-B and 4-C show an example of what has been said.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connection Of Plates (AREA)
  • Retaining Walls (AREA)
  • Working Measures On Existing Buildindgs (AREA)

Abstract

Système de connexion structurelle à postériori et procédé de connexion de structures au moyen de ce système, lequel comprend un support (3) en forme de plaque, incorporé dans une structure de renforcement (4), et au moins une vis (2) filetée dans le support (3) qui peut être placée à différentes hauteurs tout en conservant un jeu proche de zéro entre la vis (2) et le support (3), et des étapes de : placement du support (3) près de la structure existante (1) de béton à réparer, à ras de la plaque de support (3) dans le côté de la structure existante (1) ; génération d'un alvéole (5) dans la structure existante (1) ; filetage de la vis (2) restant dans l'alvéole (5) ; restitution de l'alvéole (5) de sorte que le matériau de restitution (6) relie le béton de la structure existante (1) au support (3) avec la vis (2).
PCT/ES2022/070296 2021-05-15 2022-05-13 Système de connexion structurelle à postériori et procédé de connexion de structures au moyen de ce système WO2022243589A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP202130443 2021-05-15
ES202130443A ES2928275B2 (es) 2021-05-15 2021-05-15 Método de conexión de estructuras

Publications (1)

Publication Number Publication Date
WO2022243589A1 true WO2022243589A1 (fr) 2022-11-24

Family

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Country Status (2)

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ES (1) ES2928275B2 (fr)
WO (1) WO2022243589A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS598813A (ja) * 1982-07-07 1984-01-18 岡　正孝 橋梁補強鋼材接着時のコンクリ−ト、エポキシ樹脂、鋼材を一体化するためのアンカ−工法
US20150167332A1 (en) * 2013-12-16 2015-06-18 Jfe Civil Engineering & Construction Corporation Repair and strengthening system for reinforced concrete structure
US20190153728A1 (en) * 2017-11-21 2019-05-23 Korea Institute Of Civil Engineering And Building Technology Concrete structure using reinforcing panel including embedded reinforcing grid and method of repairing and reinforcing the same

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5440945B2 (ja) * 2010-03-25 2014-03-12 株式会社大林組 軸部材とｒｃ部材との接合構造及び方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS598813A (ja) * 1982-07-07 1984-01-18 岡　正孝 橋梁補強鋼材接着時のコンクリ−ト、エポキシ樹脂、鋼材を一体化するためのアンカ−工法
US20150167332A1 (en) * 2013-12-16 2015-06-18 Jfe Civil Engineering & Construction Corporation Repair and strengthening system for reinforced concrete structure
US20190153728A1 (en) * 2017-11-21 2019-05-23 Korea Institute Of Civil Engineering And Building Technology Concrete structure using reinforcing panel including embedded reinforcing grid and method of repairing and reinforcing the same

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ES2928275B2 (es) 2023-07-27
ES2928275A1 (es) 2022-11-16

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