EP1767717A1 - System for building floors consisting of unidirectional and bi-directional flat forgings - Google Patents

System for building floors consisting of unidirectional and bi-directional flat forgings Download PDF

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Publication number
EP1767717A1
EP1767717A1 EP05754206A EP05754206A EP1767717A1 EP 1767717 A1 EP1767717 A1 EP 1767717A1 EP 05754206 A EP05754206 A EP 05754206A EP 05754206 A EP05754206 A EP 05754206A EP 1767717 A1 EP1767717 A1 EP 1767717A1
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EP
European Patent Office
Prior art keywords
reinforcement
bars
type
corrugated
bar
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP05754206A
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German (de)
English (en)
French (fr)
Inventor
Ramon Mimenza Larracoachea
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Individual
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Individual
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Publication date
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Publication of EP1767717A1 publication Critical patent/EP1767717A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/0645—Shear reinforcements, e.g. shearheads for floor slabs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts

Definitions

  • the present invention relates to a system for building floors consisting of unidirectional and bi-directional flat forgings, based on forming in situ flat composite suspending beams, with mixed and traditional reinforcements, in static collaboration with semi-resistant joists made in situ, preslabs, cross-ribs and other required reinforcement elements, in such away that with general concreting of the inside of the beams, joists, cross-ribs and effective head of the common compressor layer, it is achieved that the assembly produced works as a monolithically composed assembly, noticeably enhancing its mechanical capability.
  • the object of the invention is to achieve a system for building floors consisting of unidirectional and bi-directional flat forgings with great reduction in the volume of reinforcements, and of the beams' concrete, thus reducing the weight of the resistant element, which makes it possible to make column spans with beams of a great length for the same load, but with sufficient safety and solidity to the diagrams of bending moments, maximum foreseeable tangential cutting and shearing efforts throughout the span, including the arrows of the deformed one, in compliance with the requirements established in the regulations of Instruction EHE-98.
  • the Instruction for the design and execution of EHE-98 and EFHE 2002 is based on the fact that concrete beams are reinforced with tied or point welded corrugated bars, wherein the variable width and height of the beam corresponds to the edge of the forging, leaving the reinforcement embedded in the plate that constitutes the flat beam.
  • This construction system envisages the connectors to be arranged inclined and welded at their ends to the inverted "T" profile and to a bar constituting the hanger, supporting the ends of the mixed flat composite beam on the corresponding pillars, embedded in a hyperstatic grade, while the ends of the connecting plates of the semi-resistant joists as well as the corresponding first arch sections are separated in order to determine a cavity that is filled with concrete, complemented with the suitable reinforcement to constitute the core of the mixed flat beam.
  • the metal "T" profile is positioned in an inverted way, as mentioned beforehand, in other words, with the core facing vertically upwards and the two side wings or the horizontal stretch on the lower part, in such a way that on the upper part of the centre or corresponding edge the connectors that will be of corrugated bar are welded, with an inclination of 45° to the horizontal, connectors that in turn on the other end are welded to a corrugated bar installed throughout the length of the beam, this bar constituting what is referred to as a "hanger".
  • the metal "T" profile is not capable of absorbing the totality of the positive bending moment
  • reinforcements consisting of one or more preferably corrugated bars installed on the wings themselves that remain in a horizontal arrangement to the abovementioned "T" profile, next to the core, bars that must be duly electrowelded to the wing and to the core, with their section and length dictated by the calculations made in each case, all of the above in the event that the "T"-shaped profile and the width of the concrete of the core of the in situ mixed flat composite beam is unable to absorb the totality of the negative bending moment, in which case an extension of the concrete of the beam core will be made consisting of an abacus cemented in concrete with a width and length established by the calculations made each in case.
  • the in situ mixed flat composite beam is constituted using the necessary shuttering to receive the connecting plate of the ends of the semi-resistant joists, removing the first arch section from both sides of the forging to be able to achieve the required concreting of these ends of the joists, leaving the mixed flat composite beam's reinforcement arranged in the separation remaining between both connecting plates of the joists, in such a way that having executed the corresponding reinforcement of the rest of the plate, all of it will be concreted with the compressor layer, thus constituting the principal element of the in-situ mixed flat composite beam.
  • the basic reinforcement constituted from various corrugated bars, with the stirrups, reinforcing connectors and hangers is susceptible to being complemented with a mixed reinforcement to be able to withstand greater mechanical capability to cutting and shearing efforts, with said complementary mixed reinforcement being formed from a lower corrugated bar, or from a single inverted "T"-profile, or a double-"T" profile.
  • the present application is based on the fact that in order to maintain the structure of in situ flat composite beams a basic standard reinforcement will be used and in its specific case may be made from a corrugated bar, preferably with two, complemented with electrowelded stirrups with a U-shaped opening on the top part with two upper bars installed on the outer part of the stirrups, electrowelded.
  • the increase in the mechanical capability of the cutting effort can be achieved through introducing directly one or more traditional standard market prefabricated reinforcements, of double (or single) triangular electrowelded latticework in the necessary zone.
  • the mixed combination between the basic reinforcement and reinforcement of connectors and/or latticework provides greater mechanical capability to the cutting effort, acting with maximum efficiency in the lower part of greater tension, with the tension upwards descending with a zero trend.
  • the open U-shaped stirrups are wider at their upper part than their lower part, in the order of a calibre of 3 bars of the stirrup, in other words approximately 30 mm, so that they may be stacked vertically by insertion into each other, making it possible to store a great number of basic reinforcements and to transport them on lorries up to the maximum authorized load.
  • the composite beam may be suspended in situ, or have a prefabricated reinforced and prestressed concrete footing with the corresponding reinforcements in the same way as the one produced in the way described above.
  • the basic reinforcement wherefrom the reinforcement of the in situ mixed flat composite beam is produced, comprises one or two corrugated bars (1), on which stirrups (2) are fixed, and on the upper part of the latter, bars (3) are fixed, leaving these positioned horizontally, all of the above duly electrowelded.
  • the thus constituted reinforcement shown in figures 1 and 2 will cover several beam spans, making continuity in the corresponding pillars (4) at any point of the beam by installing the next beam, supporting it in an embedded way in said pillars (4), which will additionally support the shuttering (5) with its widened zones (5') on the pillars (4) themselves, leaving the shuttering duly shored and supporting the unidirectional resistant joists (6) that can present any configuration, complementing said joists (6) with reinforcements (7) for negative bending moments, and in specific cases with other different reinforcements (7').
  • the concrete arch sections are installed (8) which are hollow and open laterally, except for those that are adjacent to the beam's main reinforcement, which are fixed and closed on the corresponding side.
  • Both the joists (6) and the arch sections themselves (8) are separated from the main reinforcement, constituting the beam core (9).
  • the abovementioned pillars (4) they have their corresponding reinforcements (10), based on corrugated rods while certain joists (6) are equipped with the type of double electrowelded latticework (7') reinforcement as mentioned earlier.
  • figure 5 shows a cross-section view of the reinforcement corresponding to the end zones, including the reinforcement (12), inclined connectors for cutting reinforcements, as shown in figure 3, with complementary reinforcements of the reinforcements that form the stirrups.
  • Figure 6 shows a cross-section of the reinforcement of the end zones duly reinforced with double latticework reinforcements (12'), for cutting efforts, as complementary reinforcements of the reinforcements or stirrups (2).
  • Figure 7 corresponds to a cross-section of the central zone of the mixed flat composite beam made in situ produced through the basic reinforcement represented in the preceding figures, from which we can see how the reinforcement bars (11) are situated on each side of the corrugated bars (1) of the basic reinforcement, complemented with the U-shaped stirrups (2), as well as the upper bar reinforcements (3), the semi-resistant joists (6), the arch sections (8), the bar reinforcement that forms the upper hanger (16), and the beam core formed by the concrete (9) with the latter also determining the compressor layer (13) with the reinforcement (7) based on corrugated bars installed on the upper part for negative bending moments of the forging.
  • the formation of cross-ribs (14) of reinforced concrete with corrugated bars (15) is visible situated on the upper and lower part, on the joist (6).
  • Figure 8 represents the cross-section of the end zone close to the abacus of the same flat composite beam made in situ represented in figure 7, being complemented with the bracing of a mixed electrowelded prefabricated reinforcement (12) of inclined connectors to increase the cutting effort, with it being possible to see in this figure an upper hanger (16) supported on the arch sections (8) to allow suspension of the reinforcement, thus leaving sufficient concrete covering on its lower part.
  • an upper hanger (16) supported on the arch sections (8) to allow suspension of the reinforcement, thus leaving sufficient concrete covering on its lower part.
  • the common flat compressor layer (13) with the concrete cross-ribs (14) at regular intervals also presents reinforcement bars (15), duly stirruped, to prevent the appearance of longitudinal fissures or cracks in the direction parallel to the joists, both on the upper and lower face, all of the above concreted throughout the forging's entire height, with the particularity of its concrete ribs (14) being arranged between the arch sections (8), acting as a resistant element of distribution between the beams as a consequence of the actions of sporadic loads on the plate of the forging, providing an increase in the resistant capacity for the forging's transversal rigidity, in order to withstand alternative traction and compression efforts, both on the lower and upper face, produced by alternating positive and negative bending moments and transversal torsions of the forging over the joists.
  • Figure 9 shows a cross-section such as the one of the preceding figure with the bracing of a traditional reinforcement (12') prefabricated and adapted of double triangular electrowelded latticework, to increase the cutting effort, including equally the hanger (16) for the reinforcement's suspension, the upper reinforcement (7) and reinforcements (11).
  • Figure 10 corresponds to a cross-section of the end zone of the span, with the abacus (17) being visible on the support on the pillar (4), of the same in situ flat composite beam, specifically the one represented in figure 8, reinforced with the same reinforcement (12) inserted above, corrugated rods of beam negatives (18) that can equally be seen in figure 3, with it being possible to use this reinforcement of connectors in the in situ joists of the slab.
  • Figure 11 represents a cross-section such as the one of figure 8 but including as well as the reinforcement (12) other reinforcements (12') inverted in relation to the preceding ones, with a view to increasing the cutting effort.
  • Figure 12 shows a plan view of the detail corresponding to the abacus (17), the beam core (9), as well as the pillar (4) and the reinforcements (10) of the latter.
  • Figure 13 shows a cross-section of the central zone of the in situ composite beam or with prefabricated reinforced and prestressed concrete footing, wherein the suspension (9') as well as the rest of the elements that correspond to the ones of figure 7 can be seen.
  • Figure 14 shows another plan view of the detail corresponding to the abacus (17), the core (19) and the suspension (9') of the beam, equally showing the pillar (4) and its reinforcements (10).
  • Figure 15 shows a longitudinal elevation view of the basic reinforcement of stirrups with the incorporation of an additional reinforcement (11), in other words corresponding to what is shown in figure 1 with the addition of the lower reinforcement (11).
  • Figure 16 shows an longitudinal elevation view of the additional reinforcement (12), with the connectors of different types and different types of installation electrowelded, showing connectors (21) with a configuration and a specific way of installation and fixing, connectors (22) with another configuration and different method of installation, connectors (23) with a different type of installation, and connectors (25) with a different configuration and method of installation to the ones referred to before.
  • Figure 18 shows a longitudinal elevation view of the reinforcement of connectors, representing as a guideline the distribution of the separation between connectors (21) which, where applicable, would be connectors (22), (23) and (25) corresponding to figure 17.
  • This figure likewise shows the angle of crack (30) that corresponds to the oblique compression connecting rod, placing the connectors (21) orthogonally to said crack (30).
  • Figure 19 shows a longitudinal elevation view of the reinforcement of an individual beam, totally reinforced with reinforcements (11) for positive bending moments of the span, as well as cutting efforts, as a guideline, to the left with connectors (12) and to the right with double (or single) latticework connectors (12').
  • the open arrangement of the U-shaped stirrups (2) with a slightly greater extension or width in the upper part than in the lower part, allows the reinforcements to be stacked vertically inserted within each other, as shown in figure 21, making it possible to store a large number of beam reinforcements and transporting them in lorries up to the maximum authorized load.
  • Figure 22 shows the stacking of the previously referred to reinforcement, in other words those corresponding to figure 21, but incorporating the reinforcements (11) situated on the inside of the stirrups (2) making the installation of said reinforcements (11) directly at the works, when the basic reinforcements are already installed on the shuttering of the beam spans, and at the workshop on the basic reinforcement of each beam individually, making it possible to store a large number of reinforced beams and being able to transport them in lorries up to the maximum authorized load.
  • figure 24 it shows the same reinforcement as that of figure 23 but incorporating the reinforcements constituted by the corrugated bars (11), fixed through welding at the workshop.
  • Figure 25 shows a cross-section view of the central flat mixed composite beam made in situ produced from the basic standard reinforcement represented in figures 23 and 24, from which can be seen the arrangement of the bars corresponding to the reinforcements (11) and other elements that correspond to the ones shown in figure 7.
  • Figure 26 shows a cross-section view of the basic standard double latticework reinforcement represented in figure 23, wherein the lower bars (1) and upper bar (3) are joined by the latticework (2') duly electrowelded automatically.
  • Figure 27 shows a front elevation view of various basic double latticework reinforcements such as the ones shown in figure 23, stacked vertically and mounted on top of each other, packaged for their manufacturing, storage and transport to the works.
  • Figure 28 shows the same detail in section as that of figure 26 but with the lower reinforcements (11) fixed by welding, while figure 29 corresponds to the stacking represented in figure 27 but with the reinforcements given the lower reinforcements (11) meaning that figure 28 corresponds to the cross-section view of figure 24 whereas figure 29 corresponds to the stacking of beams such as the ones represented in the figures 24 and 28 described above.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Rod-Shaped Construction Members (AREA)
EP05754206A 2004-06-08 2005-06-07 System for building floors consisting of unidirectional and bi-directional flat forgings Withdrawn EP1767717A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ES200401386A ES2245244B1 (es) 2004-06-08 2004-06-08 Sistema de construccion de suelos de forjados planos unidireccionales y bidireccionales.
PCT/ES2005/000323 WO2005121470A1 (es) 2004-06-08 2005-06-07 Sistema de construcción de suelos de forjados planos unidireccionales y bidireccionales

Publications (1)

Publication Number Publication Date
EP1767717A1 true EP1767717A1 (en) 2007-03-28

Family

ID=35503107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05754206A Withdrawn EP1767717A1 (en) 2004-06-08 2005-06-07 System for building floors consisting of unidirectional and bi-directional flat forgings

Country Status (5)

Country Link
EP (1) EP1767717A1 (es)
BR (1) BRPI0509686A (es)
ES (1) ES2245244B1 (es)
WO (1) WO2005121470A1 (es)
ZA (1) ZA200609005B (es)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112295A1 (en) 2008-04-22 2009-10-28 Romtech Limited Attachment for a reinforcing cage, assembled reinforcing cage and method of constructing a part of a reinforced concrete structure
CN102733397A (zh) * 2012-07-19 2012-10-17 上海新强劲工程技术有限公司 一种基坑支护用可变尺寸和传力方向的内支撑连接件

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2282047B1 (es) * 2006-06-21 2009-05-05 Megaray, Sl. Armadura para nervio in situ.
ES2278545B1 (es) * 2006-12-29 2008-04-16 Viguetas Cases, S.L. Armadura para viguetas hechas in situ.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE637136A (es) * 1960-02-03
FR1276092A (fr) * 1960-10-03 1961-11-17 Poutres préfabriquées en métal et béton armé associés
AT378806B (de) * 1983-11-17 1985-10-10 Avi Alpenlaendische Vered Buegelkorb
ES2170664B1 (es) * 2000-05-22 2003-10-16 Garay Olatz Isabel Merino Armaduras de ferralla para la construccion de forjados unidireccionales y bidireccionales.
ES2223242B1 (es) * 2002-10-04 2006-02-16 Pilar Velasco Gonzalez Procedimiento de construccion de un forjado de nervio in situ.
ES1053007Y (es) * 2002-10-10 2003-06-16 Ceramex S L Armadura para forjados

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2005121470A1 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112295A1 (en) 2008-04-22 2009-10-28 Romtech Limited Attachment for a reinforcing cage, assembled reinforcing cage and method of constructing a part of a reinforced concrete structure
GB2459376B (en) * 2008-04-22 2012-12-19 Romtech Ltd Attachment for a reinforcing cage
CN102733397A (zh) * 2012-07-19 2012-10-17 上海新强劲工程技术有限公司 一种基坑支护用可变尺寸和传力方向的内支撑连接件
CN102733397B (zh) * 2012-07-19 2014-09-10 上海新强劲工程技术有限公司 一种基坑支护用可变尺寸和传力方向的内支撑连接件

Also Published As

Publication number Publication date
ES2245244A1 (es) 2005-12-16
BRPI0509686A (pt) 2007-10-30
WO2005121470A1 (es) 2005-12-22
ES2245244B1 (es) 2007-02-16
ZA200609005B (en) 2007-07-25

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