FR2652600A2 - Prefabricated composite structure characterised by a reverse-type construction - Google Patents

Prefabricated composite structure characterised by a reverse-type construction Download PDF

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Publication number
FR2652600A2
FR2652600A2 FR8912940A FR8912940A FR2652600A2 FR 2652600 A2 FR2652600 A2 FR 2652600A2 FR 8912940 A FR8912940 A FR 8912940A FR 8912940 A FR8912940 A FR 8912940A FR 2652600 A2 FR2652600 A2 FR 2652600A2
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FR
France
Prior art keywords
profile
concrete
projections
slab
cutting
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.)
Pending
Application number
FR8912940A
Other languages
French (fr)
Inventor
Trouillet Pierre Henri R Alain
Marcellier Robert Mario Joany
Hottier Jean-Michel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EST CTRE ETU TECH EQUIPEMENT
Original Assignee
EST CTRE ETU TECH EQUIPEMENT
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
Priority claimed from FR8903067A external-priority patent/FR2643927B1/en
Application filed by EST CTRE ETU TECH EQUIPEMENT filed Critical EST CTRE ETU TECH EQUIPEMENT
Priority to FR8912940A priority Critical patent/FR2652600A2/en
Priority to CA002003060A priority patent/CA2003060A1/en
Priority to EP89440125A priority patent/EP0369914B1/en
Priority to DE68917560T priority patent/DE68917560T2/en
Priority to AT89440125T priority patent/ATE110133T1/en
Priority to PCT/FR1989/000589 priority patent/WO1990005818A1/en
Priority to AU46371/89A priority patent/AU4637189A/en
Publication of FR2652600A2 publication Critical patent/FR2652600A2/en
Pending legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/29—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated the prefabricated parts of the beams consisting wholly of metal
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E04C3/294—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete of concrete combined with a girder-like structure extending laterally outside the element
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B2005/232—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with special provisions for connecting wooden stiffening ribs or other wooden beam-like formations to the concrete slab
    • E04B2005/235—Wooden stiffening ribs or other wooden beam-like formations having a special form

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The present invention relates to a composite structure device of the type described in the main patent no. 8,903,067 of 6 March 1989. The present addition to the invention relates to a connection device, a method for producing the latter, and its areas of application. Figure 1 shows the device which, according to the invention, makes it possible to dispense with any operation involving welding of the connector, since the latter is obtained directly in the mass of the profile. Profile and connection piece form a single element. The connection piece is formed in the embedded part of the profile and is provided for by projecting pieces whose geometry and orientation make it possible to resist the sliding and lifting forces of the concrete slab with respect to the profile, without addition of other elements foreign to the profile.

Description

La présente invention concerne un dispositif d'ossature mixte du type décrit dans le brevet principal nO 8903067 du 6 mars 1989. The present invention relates to a mixed framework device of the type described in main patent No. 8903067 of March 6, 1989.

Le présent additif à l'invention concerne un dispositif de connexion un procédé de réalisation de ce dernier, des domaines d'application. The present additive to the invention relates to a connection device, a method for producing the latter, fields of application.

La figure 1 représente le dispositif. Les figures 2 à 9 représentent plusieurs types de dispositif. La figure 10 représente un profilé ouvert. Figure 1 shows the device. Figures 2 to 9 show several types of device. Figure 10 shows an open profile.

Jusqu'à présent la connexion entre le profilé (1) et la dalle en béton (2) était assurée par un connecteur rapporté, fixé le plus souvent par soudage. Until now, the connection between the profile (1) and the concrete slab (2) has been ensured by an attached connector, most often fixed by welding.

Le dispositif selon l'invention permet d'éliminer toute opération de soudage du connecteur puisque ce dernier est obtenu directement dans la masse du profilé. Profilé et connexion forment un seul élément. The device according to the invention makes it possible to eliminate any welding operation of the connector since the latter is obtained directly in the mass of the profile. Profile and connection form a single element.

La connexion est réalisée dans la partie noyée du profilé et est assurée par des saillies dont la géométrie et l'orientation permet de s opposer aux effets de glissement et de soulèvement de la dalle béton par rapport au profilé, sans addition d'autres éléments étrangers au profilé. The connection is made in the submerged part of the profile and is ensured by projections whose geometry and orientation allow to oppose the effects of sliding and lifting of the concrete slab relative to the profile, without the addition of other foreign elements to the profile.

Le dispositif permet la répartition rationnelle et maitrisée des contraintes mécaniques de manière à ne pas dépasser les valeurs admissibles de chaque matériau. The device allows the rational and controlled distribution of mechanical stresses so as not to exceed the admissible values of each material.

Sur un même profilé il peut être envisagé une ou plusieurs géométries de saillies permettant ainsi de répondre exactement aux sollicitations locales que doit équilibrer un connecteur.  One or more projection geometries can be envisaged on the same profile, thus making it possible to respond exactly to local stresses that a connector must balance.

On sait notamment que les sollicitations que doit équilibrer le connecteur sont maximales dans les zones d'about et minimales en milieu de travée, la géométrie des connecteurs d'un même profilé pourra alors varier le long du profilé en fonction de la répartition de l'effort ou être constante dans un souci de standardisation, de simplification des calculs et mise en oeuvre. We know in particular that the stresses that the connector must balance are maximum in the end zones and minimum in the middle of the span, the geometry of the connectors of the same profile can then vary along the profile depending on the distribution of the effort or be constant for the sake of standardization, simplification of calculations and implementation.

La fonction connectrice peut alors être rationnellement assurée. The connecting function can then be rationally ensured.

La présente invention permet une infinité de cas de constructions autorisées par le sens de coulage. The present invention allows an infinite number of construction cases authorized by the direction of flow.

L'écartement des profilés est modulable, la distance entre profilé et le fond de coffrage est modulable, l'épaisseur de la dalle est modulable. The spacing of the profiles is adjustable, the distance between the profile and the bottom of the formwork is adjustable, the thickness of the slab is adjustable.

Deux profilés délimitent un espace dans lequel l'épaisseur de la dalle peut être identique ou différente des espaces voisins par le jeu des caractéristiques rhéologiques du béton frais et par la perte de charge qu'entraine l'espace libre entre le profilé et le fond de moule. Two profiles delimit a space in which the thickness of the slab can be identical or different from neighboring spaces by the play of the rheological characteristics of fresh concrete and by the pressure drop caused by the free space between the profile and the bottom of mold.

Le dispositif peut alors mécaniquement répondre exactement et rationnellement aux efforts mécaniques causés par des actions externes et internes. The device can then mechanically respond exactly and rationally to the mechanical stresses caused by external and internal actions.

Le profilé peut être brut de laminage, figures 2,4. The profile can be roughly rolled, Figures 2,4.

Le profilé peut être issu de la découpe d'un autre profilé figures 3, 5, 6, 7. La découpe peut être droite et continue, parallèle à l'axe longitudinal du profilé, elle peut aussi être ordonnée pour former des créneaux et des redans, ces derniers constituants les saillies après torsion.  The profile can come from the cutting of another profile Figures 3, 5, 6, 7. The cutting can be straight and continuous, parallel to the longitudinal axis of the profile, it can also be ordered to form slots and steps, the latter constituting the projections after twisting.

Le profilé peut être reconstitué soudé sans que le connecteur soit soudé, le profilé peut être formé d'un profil mince ouvert ou fermé obtenu par formage d'une plaque mince par exemple d'acier inoxydable tel que représenté à la figure 9. The profile can be reconstituted welded without the connector being welded, the profile can be formed from a thin open or closed profile obtained by forming a thin plate, for example of stainless steel as shown in FIG. 9.

Un matériau rigidifiant par exemple du polyuréthane pouvant inclure des armatures longitudinales peut être logé à l'intérieur du profil mince. A stiffening material, for example polyurethane, which may include longitudinal reinforcements, can be housed inside the thin profile.

La présente invention permet d'envisager l'utilisation de plusieurs matériaux ou éléments constitutifs par exemple de la dalle (2). Ces matériaux peuvent être préfabriqués et posés en fond de coffrage par exemple : carreaux de céramiques, prédalles bétons, moquette routière, revêtement de sol. The present invention makes it possible to envisage the use of several materials or constituent elements for example of the slab (2). These materials can be prefabricated and placed at the bottom of the formwork, for example: ceramic tiles, concrete slabs, road carpet, floor covering.

Les éléments préfabriqués peuvent alors remplir les fonctions de coffrages, de couche d'usure, d'isolation thermique, phonique, d'étanchéité, de propreté, d'esthétique. The prefabricated elements can then fulfill the functions of formwork, wear layer, thermal, sound insulation, sealing, cleanliness, aesthetics.

Le procédé d'exécution de la connexion consiste à réaliser dans un premier temps des coupes au plasma, à l'oxycoupage, au laser, à l'eau, à l'emporte pièces, au cisaillement, certaines coupes peuvent être suffisamment larges pour permettre le passage d'armature. Les saillies à leur base ont une largeur permettant la résistance mécanique en service, minimisant l'énergie de déformation, par torsion au moyen d'un couple de torsion défini par deux efforts opposés de même intensité et dont les points d'application respectifs se situent sur deux saillies successives.  The method of performing the connection consists in first making plasma cuts, flame cutting, laser, water, cookie cutters, shearing, some cuts may be wide enough to allow the frame passage. The projections at their base have a width allowing mechanical strength in service, minimizing the deformation energy, by torsion by means of a torsional torque defined by two opposite forces of the same intensity and whose respective points of application are located. on two successive projections.

Le dispositif selon l'invention peut être utilisé, après durcissement du béton, comme éléments successifs appuyés sur des longrines ou de chaussée directement appuyés sur une couche de forme par appui partiel ou généralisé des profilés. La légèreté de la construction mixte permet d'envisager des éléments de plusieurs mètres carrés de surface. Facilement maniable le sens du coulage permet de coffrer la surface de roulement de la chaussée et de répondre ainsi aux impératifs de sécurité et d'esthétique. La construction mixte libère un espace entre le sol et le béton utilisable pour le passage des réseaux. The device according to the invention can be used, after hardening of the concrete, as successive elements supported on sills or road directly supported on a form layer by partial or general support of the profiles. The lightness of the mixed construction makes it possible to envisage elements of several square meters of surface. Easily manageable, the direction of the pouring makes it possible to form the running surface of the roadway and thus meet the requirements of safety and aesthetics. The mixed construction frees up a space between the ground and the concrete usable for the passage of the networks.

Les matériaux du dispositif à savoir acier pour le profilé et béton pour la dalle peuvent être remplacés par d'autres matériaux respectivement aluminium, bois, poutres de béton armé ou précontraint, composite, pour le profilé et béton haute performance, béton de fibres, matière organique, composite pour la dalle.  The materials of the device, namely steel for the profile and concrete for the slab can be replaced by other materials respectively aluminum, wood, reinforced or prestressed concrete beams, composite, for the profile and high performance concrete, fiber concrete, material organic, composite for the slab.

Claims (11)

REVENDICATIONS 1. Dispositif selon l'une quelconque des revendications du brevet principal caractérisé en ce que la connexion est obtenue dans la masse du profilé.1. Device according to any one of the claims of the main patent characterized in that the connection is obtained in the mass of the profile. Profilé et connexion forment un seul élément sans soudure ni assemblage.Profile and connection form a single element without welding or assembly. 2. Dispositif selon la revendication 1 caractérisé en ce que la connexion entre le profilé (1) et la dalle (2) est assurée par des saillies formées dans le profilé à partir de découpes droites ou curvilignes dans la masse ou la peau du profilé, préférentiellement les saillies sont réalisées par torsion autour d'un ou plusieurs axes. Les saillies sont épanouies en arborescence formant ainsi des pétales.2. Device according to claim 1 characterized in that the connection between the profile (1) and the slab (2) is ensured by projections formed in the profile from straight or curvilinear cuts in the mass or the skin of the profile, preferably the projections are produced by twisting around one or more axes. The projections are open out in tree structure thus forming petals. 3. Dispositif selon l'une des revendications précédentes caractérisé en ce que le profilé est brut de laminage.3. Device according to one of the preceding claims, characterized in that the profile is roughly laminated. 4. Dispositif selon l'une des revendications précédentes caractérisé en ce que le profilé provient de la découpe d'un autre profilé, la découpe forme créneaux et redans, les redans après torsion forment saillie.4. Device according to one of the preceding claims, characterized in that the profile comes from the cutting of another profile, the cutting forms slots and steps, the steps after twisting project. 5. Dispositif selon l'une des revendications précédentes caractérisé en ce que le profilé est reconstitué soudé.5. Device according to one of the preceding claims, characterized in that the profile is reconstituted welded. 6. Dispositif selon l'une des revendications précédentes caractérisé en ce que le profilé est un profil mince ouvert ou fermé injecté ou non d'un matériau rigidifiant pouvant inclure des armatures longitudinales. 6. Device according to one of the preceding claims characterized in that the profile is a thin open or closed profile injected or not with a stiffening material which may include longitudinal reinforcements. 7. Dispositif selon l'une des revendications précédentes caractérisé en ce que la dalle de béton peut inclure plusieurs matériaux dont certains préfabriqués préférentiellement placés en fond de moule.7. Device according to one of the preceding claims, characterized in that the concrete slab can include several materials, some of which are prefabricated, preferably placed at the bottom of the mold. 8. Dispositif selon l'une des revendications précédentes caractérisé en ce que le coffrage est partie intégrante de la dalle, le coffrage est par exemple constitué d'une dalle de béton préfabriquée incluant des armatures traditionnelles solidarisant la partie préfabriquée de la partie coulée en place.8. Device according to one of the preceding claims, characterized in that the formwork is an integral part of the slab, the formwork consists for example of a precast concrete slab including traditional reinforcements joining the prefabricated part of the part cast in place . 9. Dispositif selon l'une des revendications précédentes caractérisé en ce que l'acier peut être remplacé par tout autre matériau, aluminium, bois, composite, poutre de béton armé ou précontraint. Le béton peut être remplacé par tout autre matériau, béton à haute performance, béton de fibre, composite, matière organique.9. Device according to one of the preceding claims, characterized in that the steel can be replaced by any other material, aluminum, wood, composite, reinforced or prestressed concrete beam. Concrete can be replaced by any other material, high performance concrete, fiber concrete, composite, organic matter. 10. Procédé selon l'une des revendications précédentes caractérisé en ce que les saillies peuvent être obtenues successivement ou simultanément par paire après découpe, au plasma, oxycoupage, laser ou eau sous pression ou emporte pièce, d'engravures dont certaines permettront le passage d'acier passifs de béton armé et application d'un couple de torsion défini par deux efforts parallèles, de même intensité, de sens opposés et dont les points d'application respectifs se trouvent sur chaque saillie. 10. Method according to one of the preceding claims characterized in that the projections can be obtained successively or simultaneously in pairs after cutting, plasma, flame cutting, laser or pressurized water or punch, engravings some of which will allow the passage of Passive reinforced concrete steel and application of a torque defined by two parallel forces, of the same intensity, in opposite directions and whose respective points of application are on each projection. 11. Dispositif selon l'une des revendications précédentes caractérisé en ce que les domaines d'applications sont les tabliers de ponts, les planchers industriels ou de bâtiment, les structures verticales, les éléments de toiture, les éléments de chaussée reposant sur les longrines ou directement sur une couche de forme. 11. Device according to one of the preceding claims, characterized in that the fields of application are bridge decks, industrial or building floors, vertical structures, roof elements, pavement elements resting on stringers or directly on a form layer.
FR8912940A 1988-11-16 1989-09-29 Prefabricated composite structure characterised by a reverse-type construction Pending FR2652600A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
FR8912940A FR2652600A2 (en) 1989-03-06 1989-09-29 Prefabricated composite structure characterised by a reverse-type construction
CA002003060A CA2003060A1 (en) 1988-11-16 1989-11-15 Process for uniting a mass of material to a functional support, and device thus made
EP89440125A EP0369914B1 (en) 1988-11-16 1989-11-16 Method for joining a matrix material to a functional support, and devices manufactured according to this method
DE68917560T DE68917560T2 (en) 1988-11-16 1989-11-16 Method for connecting a matrix material to a functional carrier and devices produced using this method.
AT89440125T ATE110133T1 (en) 1988-11-16 1989-11-16 METHOD OF CONNECTING A MATRIX MATERIAL TO A FUNCTIONAL CARRIER AND DEVICES MADE WITH THESE METHOD.
PCT/FR1989/000589 WO1990005818A1 (en) 1988-11-16 1989-11-16 Method for making integral a mass of material with a functional support, and devices thus obtained
AU46371/89A AU4637189A (en) 1988-11-16 1989-11-16 Method for making integral a mass of material with a functional support, and devices thus obtained

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8903067A FR2643927B1 (en) 1989-03-06 1989-03-06 PREFABRICATED MIXED FRAME CHARACTERIZED BY A CONVERSION FOR TURNING
FR8912940A FR2652600A2 (en) 1989-03-06 1989-09-29 Prefabricated composite structure characterised by a reverse-type construction

Publications (1)

Publication Number Publication Date
FR2652600A2 true FR2652600A2 (en) 1991-04-05

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FR8912940A Pending FR2652600A2 (en) 1988-11-16 1989-09-29 Prefabricated composite structure characterised by a reverse-type construction

Country Status (1)

Country Link
FR (1) FR2652600A2 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060188A1 (en) * 1999-04-06 2000-10-12 Erik Danielsson A building structure element and stiffening plate elements for such an element
CN100343460C (en) * 2005-11-22 2007-10-17 南京工业大学 Steel-concrete combined beam
US11028573B1 (en) * 2020-01-16 2021-06-08 Novel Structures, LLC Serrated beam
US11725386B2 (en) 2020-01-16 2023-08-15 Simpson Strong-Tie Company Inc. Serrated beam

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR742922A (en) * 1933-03-18
FR1173935A (en) * 1957-01-28 1959-03-04 Homogeneous floor with ultra-light metal frame
FR1500829A (en) * 1966-05-10 1967-11-10 Construction process for composite steel-concrete bridges and resulting bridges
US3576069A (en) * 1969-05-23 1971-04-27 Edward Augustus Proctor Process for forming a composite building construction
DE2239572A1 (en) * 1972-08-11 1974-02-21 Gerhard Dipl Ing Tuch COMPOSITE BEAM WITH SERRATED FLANGE MOUNTING AND HIGHLY CURVED PUSH DOWELS AND REINFORCED CONCRETE PANELS MADE OF PRECAST ELEMENTS
US4115971A (en) * 1977-08-12 1978-09-26 Varga I Steven Sawtooth composite girder
EP0080321A1 (en) * 1981-11-25 1983-06-01 Keith, Guy Nelson & Grossmann, Stanley Joseph trading as KEITH & GROSSMAN LEASING COMPANY Composite, pre-stressed, structural member and method of making same
US4495688A (en) * 1983-09-07 1985-01-29 Francois Longpre Prefabricated concrete panel with truss
FR2578276A1 (en) * 1985-03-01 1986-09-05 Rech Etudes Tech Concrete construction element, particularly floor element, and method for its production
DE3738524A1 (en) * 1987-11-13 1989-05-24 Gernot Wolperding Composite girder with steel web

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR742922A (en) * 1933-03-18
FR1173935A (en) * 1957-01-28 1959-03-04 Homogeneous floor with ultra-light metal frame
FR1500829A (en) * 1966-05-10 1967-11-10 Construction process for composite steel-concrete bridges and resulting bridges
US3576069A (en) * 1969-05-23 1971-04-27 Edward Augustus Proctor Process for forming a composite building construction
DE2239572A1 (en) * 1972-08-11 1974-02-21 Gerhard Dipl Ing Tuch COMPOSITE BEAM WITH SERRATED FLANGE MOUNTING AND HIGHLY CURVED PUSH DOWELS AND REINFORCED CONCRETE PANELS MADE OF PRECAST ELEMENTS
US4115971A (en) * 1977-08-12 1978-09-26 Varga I Steven Sawtooth composite girder
EP0080321A1 (en) * 1981-11-25 1983-06-01 Keith, Guy Nelson & Grossmann, Stanley Joseph trading as KEITH & GROSSMAN LEASING COMPANY Composite, pre-stressed, structural member and method of making same
US4495688A (en) * 1983-09-07 1985-01-29 Francois Longpre Prefabricated concrete panel with truss
FR2578276A1 (en) * 1985-03-01 1986-09-05 Rech Etudes Tech Concrete construction element, particularly floor element, and method for its production
DE3738524A1 (en) * 1987-11-13 1989-05-24 Gernot Wolperding Composite girder with steel web

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000060188A1 (en) * 1999-04-06 2000-10-12 Erik Danielsson A building structure element and stiffening plate elements for such an element
US7007434B1 (en) 1999-04-06 2006-03-07 Erik Danielsson Building structure element and stiffening plate elements for such an element
CN100343460C (en) * 2005-11-22 2007-10-17 南京工业大学 Steel-concrete combined beam
US11028573B1 (en) * 2020-01-16 2021-06-08 Novel Structures, LLC Serrated beam
US11725386B2 (en) 2020-01-16 2023-08-15 Simpson Strong-Tie Company Inc. Serrated beam

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