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WO1998051877A1 - Construction de dallage - Google Patents

Construction de dallage Download PDF

Info

Publication number
WO1998051877A1
WO1998051877A1 PCT/GB1998/001337 GB9801337W WO9851877A1 WO 1998051877 A1 WO1998051877 A1 WO 1998051877A1 GB 9801337 W GB9801337 W GB 9801337W WO 9851877 A1 WO9851877 A1 WO 9851877A1
Authority
WO
WIPO (PCT)
Prior art keywords
channel
slab construction
formers
construction according
lipped
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.)
Ceased
Application number
PCT/GB1998/001337
Other languages
English (en)
Inventor
Lynnette Hillier
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.)
SKONE JAMES ROBERT EDMUND
Original Assignee
SKONE JAMES ROBERT EDMUND
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 SKONE JAMES ROBERT EDMUND filed Critical SKONE JAMES ROBERT EDMUND
Priority to AU73452/98A priority Critical patent/AU7345298A/en
Publication of WO1998051877A1 publication Critical patent/WO1998051877A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/261—Monolithic filling members
    • E04B5/263—Monolithic filling members with a flat lower surface
    • 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
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • 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
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/261—Monolithic filling members
    • 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
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/261—Monolithic filling members
    • E04B5/265—Monolithic filling members with one or more hollow cores
    • 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

  • THIS invention relates to slab constructions and apparatus used in such constructions.
  • Figure 1 of the accompanying drawings shows a conventional slab construction which makes use of pre-manufactured elements to provide permanent forrawork for in situ concrete.
  • Figure 1 shows spaced apart, parallel, channel-section members 1 (only one visible) which span between support structures (not shown), typically load-bearing walls or steel and/or concrete frame structures, at opposite edges of an area which is to be spanned by the slab.
  • the numeral 2 indicates formers in the form of precast concrete blocks which have side flanges 3 that are suppo ⁇ ed by the channel- section members 1.
  • the numeral 4 indicates in situ concrete which is placed over the permanent formwork formed by the channel-section members 1 and the concrete blocks 2.
  • the end result is a slab 5 which has planar upper and lower surfaces 6 and 7 respectively.
  • a slab construction comprising concrete placed in situ on permanent formwork which includes spaced apart, parallel, channel structures and formers which are located between and are supported by the channel structures, wherein each channel structure comprises two or more channel-section formations located side-by- side and the concrete fills the channel structures to form spaced apart beam formations and covers the formers to form a slab formation shallower than die beam formations.
  • each channel structure comprises individual channel- section members located side-by-side with one another.
  • Each channel structure may comprise first and second channel-section members in the form of lipped channels, adjacent lips of the channels mating with one another.
  • each channel structure is a unitary structure with side- by-side channel-section formations formed integrally with one another.
  • the invention envisages various types of former. They may for instance comprise precast concrete blocks, polystyrene bonded to support members such as boards or trays, or curved shutters, typically of plastics or other materials. In addition to the formers there may be trays supported by the channel structures beneath the formers, the trays having bases and being shaped such that their bases are flush with the bases of the channel structures thereby to form a slab construction with a planar undersurface.
  • the invention also provides for shear connectors to be fixed into at least one channel-section formation of at least one of the channel structures, each shear connector comprising a channel-section element which has a base located on die base of the channel-section member and two upstanding legs.
  • each channel structure will obviate the need for extra steel reinforcing bars in the channel structure.
  • extra reinforcing bars may still be necessary.
  • the invention also provides spacers fixed into at least one channel-section member of at least one of the channel structures, each spacer comprising a channel-section element which has a base located on the base of the channel-section member and two upstanding legs spaced apart in the direction in which the channel-section member spans, one of the legs being shorter than the other and the longer leg including at least one rebate to receive and support a reinforcing bar, the inner extremity of the rebate registering with the upper edge of the shorter leg.
  • the invention also extends to a channel structure for use in the slab construction, the channel structure comprising two or more channel formations located or eatable side-by-side,
  • the channel formations may be provided by individual, channel-section members mateable wiflt one another in side-by-side relationship, or they may be formed integrally with one another to define a unitary channel structure.
  • Figure 1 shows part of a conventional slab construction
  • Figures 2A, 2B and 2C illustrate the mating of two channel- section members to form a channel structure in accordance with one embodiment of the present invention
  • Figure 3 shows part of a slab construction, formed using the channel structure seen in Figure 2C, in accordance with this invention
  • Figures 4A, 4B and 4C illustrate the mating of two channel- section members to form a channel structure in accordance with a second embodiment of the present invention
  • Figure S shows part of a slab construction, formed using the channel structure seen in Figure 4C, in accordance with this invention
  • Figure 6 illustrates a shear connector in a channel-section member
  • Figure 7 illustrates a spacer in a channel-section member
  • Figure 8 shows a cross-section at the line 8-8 in Figure 7;
  • FIG. 9 to 15 illustrate further embodiments of the invention.
  • Figure 1 illustrates a conventional slab construction incorporating concrete 4 placed in situ on permanent formwork including channel-section members 1 and formers 2 in the form of precast concrete blocks.
  • the remaining Figures illustrate various embodiments of the present invention.
  • first channel section member 10 Figure 2A
  • second channel-section member 12 Figure 2B
  • a channel structure 14 Figure 2C formed by mating the channel-section members 10 and 12 with one another.
  • the channel-section member 10 is a lipped channel with inwardly directed, opposing lips 16 and 17.
  • the channel- section member 12 is also a lipped channel, but in this case one lip 18 is inwardly directed and the other Up 20 is outwardly directed.
  • the lip 20 has a bent-over terminal edge 22 as illustrated.
  • the channel structure 14 is formed by locating the channel-section members 10 and 12 in side-by-side contact with one another with the outwardly directed lip 20 of the member 12 locating over the adjacent inwardly directed lip 16 of the member 10. and with the bent-over terminal edge 22 embracing the inner edge of that lip. It will accordingly be seen that the assembled channel structure 14 comprises channel-section formations which are located side by side.
  • Figure 3 shows part of a slab construction 24 formed using channel structures 14. Although only one such structure is seen in this Figure, it will be appreciated that in practice there will be a number of such structures arranged in spaced apart, parallel relationship, with each channel structure supported at its ends, typically by load-bearing walls or steel and/or concrete frame structures.
  • the slab construction 24 also includes a series of formers 26, similar to the conventional formers 2 described above in relation to Figure 1.
  • the formers are in the form of precast concrete blocks and have side flanges 28 resting on the lips 17 and 18 of the channel-section members.
  • the channel structures 14 and formers 26 form permanent formwork for the slab construction 24.
  • Wet concrete is placed in situ over the permanent formwork and is allowed to cure to form the final slab construction.
  • the channel-section members 10 and 12 are cold formed of a structural grade of steel.
  • the mating of the two cold formed, structural steel channel- section members 10 and 12 with one another provides a channel structure which has better bending and shear resistance than a single mild steel channel-section member as used in conventional slab constructions, both because of the nature of the steel and because of the increased moment of inertia attributable to the presence of the central legs 30, 32, which are effectively keyed into the concrete.
  • the increased bending and shear resistance afforded by this aspect of the invention will eliminate the need for extra steel reinforcing bars corresponding to the bars 8 seen in Figure 1.
  • Figures 7 and 8 illustrate a spacer which can be used to support a steel reinforcing bar and provide it with the necessary concrete cover.
  • the spacer 34 seen in Figures 7 and 8 is of channel shape, with a web 36 and two legs 38 and 40. The web is located on the base of the channel-section member 10 and is fixed there by spot welds 42.
  • the leg 38 is somewhat longer than the leg 40 and is formed with an arcuate rebate 44.
  • the bottom of the rebate registers with die upper edge of die leg 40.
  • a reinforcing bar 46 can be received in the rebate and hence rests on the bottom of the rebate and on the upper edge of the leg 40.
  • Spacers 34 are positioned at lengthwise intervals along the length of the channel-section member and, if necessary, also in the channel-section member 12, with each such spacer then providing two-point support for a steel reinforcing bar. If required, each spacer may have multiple rebates to accommodate multiple reinforcing bars.
  • Figu T e 6 shows a shear connector 50 which can be located at an appropriate position in the channel-section member 10, or a channel-section member 12, or in both channel-section members to provide increased shear resistance.
  • the shear connector 50 has a cross-section similar to that of a spacer 34 and is welded in position by spot welds 52. The length of the shear connector will be determined in each case by the structural design of the slab.
  • Figures 4A, 4B, 4C and 5 correspond to Figures 2A, 2B, 2C and 3, and illustrate another embodiment of the invention.
  • the lip 17 of the channel-section member 10 and the lip 18 of the channel-section member 12 have upwardly directed terminal edges 60 and 62, thereby forming shoulders 64 along opposite sides of the composite channel structure 14, as seen in Figure 4C.
  • the channel structure 14 comprises side by side channel-section formations.
  • the spacers 34 and shear cormectors 50 have considerable versatility and can be used in other types of slab construction.
  • the spacers 34 could also be used to support post-tensioned cables, as described in a co-pending patent application filed simultaneously with the present application.
  • Figures 9 to 15 illustrate other embodiments of the invention.
  • the channel structures 14 are formed by individual channel-section members mated side by side with one another
  • the channel structure 14 in Figure 9 is a unitary structure rolled to the illustrated shape.
  • the integral internal web 70 serves a purpose similar to that of the internal flanges in the embodiments seen in Figures 2C and 4C.
  • the formers include precast concrete blocks 72 similar to the formers 26 described previously. However in this case, the formers also include polystyrene elements 74 located atop the blocks 72.
  • the channel structure 14 is once again a unitary' structure which presents side by side channel-shaped formations.
  • the internal web 70 in this case has downwardly converging sides as illustrated and the outer lips of the channel structure present shoulders similar to those in Figure 4C.
  • the formers in this embodiment include steel trays 74 carrying polystyrene blocks 78.
  • Figure 1 1 shows a portion of a slab construction which includes a unitary channel structure 14 with an internal web similar to the web 70 in Figure 10 and formers similar to the formers 26 in Figure 3.
  • Figure 12 shows a portion of a slab construction which includes a unitary channel structure 14 with an internal web 70 similar to that in Figure 9 and upwardly directed terminal edges presenting shoulders similar to those in Figure 4C.
  • the formers in this case are of the type described above in relation to Figure 5.
  • the channel structure 14 is the same as that in Figure 10, but the formers in this case are provided by smaller precast concrete blocks 80 which result in a non-planar slab under-surface.
  • the formers are provided by dished or curved shutters 82 which are typically of fibre-reinforced concrete or other material. Similar shutters 82 are used in the embodiment of Figure 15.
  • the under-surface of the slab construction is given a planar shape by virtue of the provision of trays 84 which are supported on the shoulders of the channel structures 14.
  • the embodiment of Figure 15 differs from that of Figure 14 in that the shoulders at the sides of the channel structures 14 have a different profile and in that the trays are absent, resulting in a non-planar slab under-surface.
  • the arrangement of channel structures and formers give rise to a slab construction in which the unitary mass of in altu concrete forms spaced apart beam formations and covers the formers to form slab formations.
  • the slab formations are of course shallower than the beam formations in which tensile reinforcement is provided by the permanent channel structures, with or without extra steel reinforcing bars.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

L'invention concerne une construction de dallage dans laquelle on place le béton sur place dans un coffrage permanent. Ce coffrage comprend des structures parallèles de canaux (14) éloignées les unes des autres et des banches (26) placées entre ces structures de canaux et supportées par ces dernières. Chaque structure de canal possède deux ou plusieurs sections de canal placées côte-à-côte. Le béton remplit ces structures de canaux, de manière à créer des parties poutre éloignées les unes des autres, et recouvre les banches, de manière à créer des parties dalle moins profondes que les parties poutre.
PCT/GB1998/001337 1997-05-09 1998-05-11 Construction de dallage Ceased WO1998051877A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU73452/98A AU7345298A (en) 1997-05-09 1998-05-11 Slab construction

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ZA974035 1997-05-09
ZA97/4035 1997-05-09

Publications (1)

Publication Number Publication Date
WO1998051877A1 true WO1998051877A1 (fr) 1998-11-19

Family

ID=25586394

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1998/001337 Ceased WO1998051877A1 (fr) 1997-05-09 1998-05-11 Construction de dallage

Country Status (2)

Country Link
AU (1) AU7345298A (fr)
WO (1) WO1998051877A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101787760A (zh) * 2010-02-26 2010-07-28 张吉华 钢筋砼预制楼板

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1172553A (fr) * 1956-11-22 1959-02-11 Plancher en poutrelles et hourdis préfabriqués
GB1004761A (en) * 1960-12-17 1965-09-15 Domenico Lamanna Improvements in and relating to structural panels for floors
FR1428749A (fr) * 1965-03-18 1966-02-18 Robinson Building Tech Ltd Forme de moulage pour constructions en béton
DE2950614A1 (de) * 1979-12-15 1981-07-02 Adalbert 7090 Ellwangen Stegmaier Endlosprofil fuer die herstelung von stahlbetondecken, verfahren zur herstellung des profils und der decken
DE3308473A1 (de) * 1983-03-10 1984-09-13 Manfred 4300 Essen Bruer Bausatz fuer balken- oder rippendecken

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1172553A (fr) * 1956-11-22 1959-02-11 Plancher en poutrelles et hourdis préfabriqués
GB1004761A (en) * 1960-12-17 1965-09-15 Domenico Lamanna Improvements in and relating to structural panels for floors
FR1428749A (fr) * 1965-03-18 1966-02-18 Robinson Building Tech Ltd Forme de moulage pour constructions en béton
DE2950614A1 (de) * 1979-12-15 1981-07-02 Adalbert 7090 Ellwangen Stegmaier Endlosprofil fuer die herstelung von stahlbetondecken, verfahren zur herstellung des profils und der decken
DE3308473A1 (de) * 1983-03-10 1984-09-13 Manfred 4300 Essen Bruer Bausatz fuer balken- oder rippendecken

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101787760A (zh) * 2010-02-26 2010-07-28 张吉华 钢筋砼预制楼板

Also Published As

Publication number Publication date
AU7345298A (en) 1998-12-08

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