WO2016117753A1 - Système d'ancrage d'élément de précontrainte d'un plancher résistant au feu à longue portée précontraint et ancré sur une partie d'extrémité de plancher, et son procédé de construction - Google Patents

Système d'ancrage d'élément de précontrainte d'un plancher résistant au feu à longue portée précontraint et ancré sur une partie d'extrémité de plancher, et son procédé de construction Download PDF

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Publication number
WO2016117753A1
WO2016117753A1 PCT/KR2015/001969 KR2015001969W WO2016117753A1 WO 2016117753 A1 WO2016117753 A1 WO 2016117753A1 KR 2015001969 W KR2015001969 W KR 2015001969W WO 2016117753 A1 WO2016117753 A1 WO 2016117753A1
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WO
WIPO (PCT)
Prior art keywords
tension
deck
fixing
tension member
steel
Prior art date
Application number
PCT/KR2015/001969
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English (en)
Korean (ko)
Inventor
최성모
Original Assignee
서울시립대학교 산학협력단
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.)
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Publication date
Application filed by 서울시립대학교 산학협력단 filed Critical 서울시립대학교 산학협력단
Priority to CN201580001434.6A priority Critical patent/CN106030003B/zh
Publication of WO2016117753A1 publication Critical patent/WO2016117753A1/fr

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    • 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
    • E04B5/32—Floor structures wholly cast in situ with or without form units or reinforcements
    • E04B5/36—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor
    • E04B5/38—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element
    • E04B5/40—Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcement; Form slabs with reinforcements extending laterally outside the element with metal form-slabs
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
    • 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
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing

Definitions

  • the present invention relates to a tension member fixing system of a long span fireproof deck, in particular, it is possible to apply the bending displacement amount upwards without damage or damage to the deck plate at the deck end, and the direction of the arrangement at the fixing point of the tension member is to match the direction of the tension force.
  • the tension material fixing system of the long-span fireproof deck which is tension-fixed at the end of the deck, and a construction method thereof.
  • a steel composite beam system in which a slab is placed on an upper flange of an H-beam, and the slab and an H-beam are integrated by a shear connecting member (shear stud) installed on the upper flange of the beam.
  • a shear connecting member shear stud
  • This slim floor method is a general term for the composite floor plate method in which a slab is inserted into a steel ball.
  • Steel beams use asymmetric H-beams whose width is lower than that of upper flanges to increase the cross-section efficiency of the beams and make the beams dance smaller than conventional ones. Compared with this, it can save a lot.
  • the slab is inserted into the web of the cheolgolbo can relatively reduce the floor height and improve the integrity of the bottom plate and the beam, there is no need for fireproof coating, it is a method that has a number of advantages such as the reduction of the exterior material due to the floor height reduction.
  • the deck plate when the construction of the deck plate applied to the slab when the worker or material weight acts on the deck plate, the deck plate is difficult to implement the long span because the amount of deflection.
  • a separate copper bar must be installed, and a small beam must be installed in the middle, thereby degrading economic efficiency and constructability.
  • Korean Patent Registration No. 10-1337326 synthetic slab refractory method using a wire rope
  • the wire rope is connected to the middle of the installed deck plate is fixed to the wire rope so that both ends extend to the beam located above the deck plate, and the slab concrete on the deck plate
  • the slab concrete is fixed to one end of the wire rope fixed to the beam
  • the other end is tensioned to the beam so that the prestress can be introduced in a posttension or pretension manner
  • the end of the deck plate is installed to be supported by the lower flange of the beam, and each end of the wire rope is provided on the upper flange of the beam.
  • Deck play to fix or tension The load transmitted from the rod is distributed to the beam via the wire rope.
  • the background art is that the wire rope support which acts as a point in contact with the wire rope is directly connected to the deck plate, so that the deck plate is torn apart when tension is settled, so that it is difficult to properly apply the tension force.
  • the wire rope is bent in the direction of the fixing point occurs a phenomenon that the tension direction does not coincide, the tension workability is inferior.
  • the present invention can apply the bending displacement amount upward without breakage or damage of the deck plate, and the tension member fixing of the long span fireproof deck having tension fixation at the end of the deck so that the arrangement direction at the fixing point of the tension member can be matched with the tension force direction.
  • the object is to provide a system and a construction method thereof.
  • a tension member fixing unit which is positioned at both ends of the concrete filling bone of the deck plate body and is supported by the copper plate is installed;
  • the tension member is characterized in that both ends are connected to the tension member fixing unit side and at the same time is placed in contact with the lower surface of the tension bar for steel rods installed in two places in the remaining section is installed so as to exert the lifting support force.
  • the tension member fixing unit The tension member fixing unit,
  • a fixing plate in close contact with both end sides of the deck plate body
  • Tapered coupled to the fixing block is characterized in that it comprises a plurality of divided wedges for fixing the tension member by wedge force.
  • the fixing plate is characterized by consisting of a section steel having a c-channel cross-section in the intermittent or continuous type.
  • the c-type end of the fixing plate is characterized in that it further comprises an inner bent end bent inward.
  • the fixing plate has an angle angle portion to form a right angle with the direction of tension at the fixing point of the tension member, characterized in that the angle angle portion is configured to be intermittent or continuous.
  • angle square portion is characterized in that the filler is installed in the inner region for reinforcement.
  • angle square portion is characterized in that the reinforcement wing is further bonded to reinforce the brace rigidity.
  • the steel bar connection clasp is made of a plate-like curved or bent, characterized in that the steel rod insertion port for enabling the insertion of the steel bar for tension points around.
  • the steel rod connection clasp is characterized in that it has a cross-sectional shape of any one of the C-type, spiral type, c-type.
  • the front surface of the fixing plate is characterized in that a pair of fixing plate guide blades further provided to guide the insertion of the fixing plate to the concrete filling bone.
  • a tension member point jig inserted into the tension member and disposed inward of the shape steel
  • a fixing block in close contact with a rear surface of the jig for tension point
  • Tapered coupled to the fixing block is characterized in that it comprises a plurality of divided wedges for fixing the end of the tension member by wedge force.
  • It is characterized in that it comprises a tension nut which is located on the rear surface of the tension member point jig screwed to the end of the tension member.
  • the construction method of the tension material fixing system of the long-span fireproof deck is tension-fixed at the deck end according to the preferred embodiment of the present invention
  • the tension member fixing unit is easy to install on the end side of the deck plate without welding by using the fixing plate, the tension member in the case of having an angled corner
  • the tension efficiency can be improved by matching the direction of tension application with the direction of the arrangement at the tension point.
  • the steel bar for the tension point is not directly coupled to the cross-sectional wall of the deck plate body, but transmits a force through the steel rod support plate, so that the deck plate body can be installed without being torn or broken.
  • FIG. 1 is a perspective view and a partially enlarged view of a deck plate equipped with a tension fixing system according to the present invention.
  • FIG. 2 is a plan view of FIG. 1 and an enlarged view of each recess.
  • FIG. 3 is a cross-sectional view taken along the line K-K of FIG.
  • FIG. 4 is a cross-sectional view taken along the line X-X of FIG.
  • 5a to 5e is an installation state of each according to various modifications of the tension member fixing unit applied to the present invention.
  • Figure 6 is a view showing a continuous installation state of the tension member fixing unit applied to the present invention.
  • Figure 7 is a view showing the various forms of steel rod connection shackle applied to the present invention.
  • FIG. 8 is a construction sequence diagram of the deck plate equipped with the tension fixing system according to the present invention.
  • Figure 9a is an installation state of another embodiment of the tension member fixing unit applied to the present invention.
  • FIG. 9B is a left side view of FIG. 9A; FIG.
  • Figure 10a is an installation state of another embodiment of the tension member fixing unit applied to the present invention.
  • FIG. 10B is a left side view of FIG. 10A; FIG.
  • the tension fixing system of the long span refractory deck plate support the tension member 40 to the concrete filling bone 12 of the deck plate body 10 as an upward point element to the deck plate body 10
  • a pair of steel bar support plates 20 and 20 mounted in two places in the longitudinal direction on the side wall of the concrete filling bone (side wall) and a steel bar connection clasp respectively connected to the pair of steel bar support plates 20 and 20 ( 22 and 22, and the tension bar is provided for the tension bar 24, which both ends are fitted to the steel rod connecting clasps (22 and 22) facing each other.
  • the steel bar support plates 20 and 20 are joined to the side plates 101 positioned on the concrete filling bone of the deck plate body 10 by fastening the bolts 27 and the nuts. As such, the steel bar support plates 20 and 20 may be installed on the deck plate body 10 by bolting to prevent a poor bonding due to welding.
  • Steel rod connecting clasp 22 is made of a plate-like curved or bent, it is configured to include a steel rod insertion opening (22a) to enable the insertion of the steel bar 24 for tension points around. Therefore, the steel rod connecting clasp 22 may have a cross-sectional shape of any one of spiral type, C type, and c type as shown in (a), (b) and (c) of FIG. 7.
  • Both ends of the deck plate body 10 are provided with a tension member fixing unit 30 supported by the copper plate (11).
  • the tension member fixing unit 30 may include a fixing plate 31 which is in close contact with both ends of the deck plate body 10, and a fixing block 33 which is joined to the fixing surface of the angle plate 32. It is configured to include a plurality of divided wedges 34 are tapered to the fixing block 33 to fix the tension member 40 by wedge force.
  • the fixing plate 31 may further include an angled corner portion 311 to form a right angle with the direction of tension at the fixing point of the tension member 40 as shown in FIGS. 1 and 5A.
  • the angle square portion 311 may be configured intermittently or continuously as shown in FIG.
  • the filler 35 may be installed in the angled corner portion 311 for reinforcement as shown in FIG. 5A.
  • the filler 35 may be cured by filling concrete mortar in the angle square part 311.
  • the reinforcing blades 36 may be joined to both ends of the angle square portion 311.
  • the fixing plate 31 may be provided with a stepped portion 31a bent upward.
  • the stepped portion 31a may be used for mounting a fastening part (screw screw, bolt, etc.) for fixing the fixing plate 31.
  • the fixing plate 31 may be composed of a section steel having a c-channel cross-section, in this case it may be of course intermittent or continuous.
  • the inner bent end 313 bent inward to the c-shaped end of the fixing plate 31 as shown in Figure 5e may be further configured.
  • the inner bent end 313 may be utilized as a point of the hydraulic jack (not shown) when the tension member 40 is tensioned.
  • a pair of fixing plate guide wings 31b facing each other to guide the insertion of the fixing plate 31 into the concrete filling bone 12 may be further installed on the front surface of the fixing plate 31 as shown in FIG. 5A. .
  • the tension member 40 is connected to the tension member fixing unit 30, both ends of the tension member at the same time at the rest of the rest of the tension plate points installed in the concrete filling bone 12 of the deck plate body 10 It is provided in contact with the lower surface of (24) so that a lifting support force may be exhibited.
  • the tension member 40 may be a steel wire, a lecture book, a steel rod, or the like.
  • both ends of the deck plate body 10 are H-beams 5 as shown in (B). Is supported to). At this time, both ends of the deck plate body 10 is raised on the upper surface of the lower flange of the H-beams 5 to be supported. The deck plate body 10 is then fixed to the H-beams 5 through bolts or welding.
  • the deck plate body 10 is applied to the installation of the copper plate 11 in order to prepare for concrete pouring at both ends.
  • the tension member 40 is disposed.
  • the tension member 40 is disposed to hang on the concrete filling bone 12 of the deck plate body 10 as shown in FIGS. 1 to 3, and then the tension rod 40 for the tension member point 24 as shown in FIG. 3. Is inserted into the steel rod connection clasps 22 and 22 installed on the concrete filling bone 12 of the deck plate body 10.
  • the tension member fixing unit 30 is installed on both end portions of the deck plate body 10.
  • the tension member fixing unit 30 is installed by fixing the fixing plate 31 to the copper plate 11 with screw screws or bolts as shown in FIG. 1.
  • the tension member fixing unit 30 is installed so that the angle square portion 311 is positioned on the extension line of the concrete filling bone (12).
  • both ends of the tension member 40 is inserted into the fixing block 33 of the tension member fixing unit 30, respectively, and the tension member 40 is tensioned using a hydraulic jack (not shown), and then wedges 34 are used. It is fixed to the fixing block 33.
  • the tension member 40 corresponds to the tension direction at the anchorage point, and thus the tension force is generated. Therefore, the tension member 40 is brought into contact with the two tension point steel rods 24 by the tension force, and then the steel rod 24 is upwardly raised. Will be pushed up by force (see Fig. 4).
  • the deck plate body 10 has a predetermined camber angle at both ends and has a certain amount of displacement rising from the center upward.
  • the displacement amount may have as much as l / 200 ⁇ l / 250 with respect to the length l of the deck plate body (10).
  • the concrete 200 is poured on the upper surface of the deck plate body 10.
  • the height of the upper surface of the concrete is made higher than the height of the upper surface of the deck plate body (10). Therefore, the pour concrete is cured by installing the tension member 40 and the tension member fixing unit 30 to form a concrete slab.
  • the load of the slab in which the concrete is poured is opposed to the tension of the tension member 40 applied in advance, so that the phenomenon of the deck plate body 10 is not sag.
  • the tension bar steel 24 is not directly coupled to the cross-sectional wall of the deck plate body 10, but transmits the force through the steel rod support plate 20 to the cross-sectional wall of the deck plate body 10 Construction is possible without the side plate being torn or damaged.
  • tension member fixing unit 30 can be configured as shown in Figure 9a and 9b.
  • the tension member fixing unit 30 may be formed of an L-shaped cross section that is in close contact with the end plate side plate 11 of the deck plate body 10, and the tension member may be disposed inward of the shape steel 131.
  • the tension member fixing unit 30 may be configured as shown in FIGS. 10A and 10B. As shown in FIGS. 10A and 10B, the tension member fixing unit 30 is disposed inside the L-shaped cross section of the L-shaped cross section which is in close contact with the end plate side plate 11 of the deck plate main body 10, and inside the shaped steel 131. It can be configured to include a tension member jig 132 and the tension nut 133 is located on the back of the tension member point jig 132 is screwed to the end of the tension member 40.
  • the tension member fixing system of the long span fireproof deck tension-fixed at the deck end of the present invention is easy to install the tension member fixing unit without welding to the end side of the deck plate by using the fixing plate, the tension of the tension material in the case of having an angled square Tension efficiency can be improved by matching the application direction with the placement direction at the tension point, and the tension plate is not directly coupled to the cross-section wall of the deck plate body, but instead transfers the force through the rod support plate. It is a very useful invention that the construction can be carried out without the body torn or broken.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Building Environments (AREA)
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Abstract

La présente invention concerne : un système d'ancrage d'élément de précontrainte d'un plancher résistant au feu à longue portée précontraint et ancré sur une partie d'extrémité de plancher, le système d'ancrage d'élément de précontrainte appliquant une valeur de déplacement de flexion vers le haut sans endommager ou rompre une plaque de plancher, et rendant le sens de disposition d'un élément de précontrainte au niveau de la position d'ancrage de celui-ci cohérente avec la direction de la force de précontrainte. L'invention concerne également un procédé de construction de celui-ci. Un système d'ancrage d'élément de précontrainte d'un plancher résistant au feu à longue portée précontraint et ancré sur une partie d'extrémité de plancher, selon un aspect d'un mode de réalisation approprié de la présente invention, est un système d'ancrage d'élément de précontrainte destiné à commander, par un élément de précontrainte, la déviation d'un corps principal de plaque de plancher supporté et monté sur des poutres en acier en forme de H, qui se font face les unes aux autres, et est caractérisé en ce que : les éléments de positionnement vers le haut de la plaque de plancher comprennent ladite paire de plaques support à tige en acier reliées par des boulons à deux parties creuses de remplissage en béton ouvertes vers le haut du corps principal de plaque de plancher de manière à se faire face l'une à l'autre, des verrous de connexion de tige en acier respectivement reliés à une paire de plaques support à tige en acier, et des tiges en acier de positionnement d'élément de précontrainte placées en fixant les deux extrémités de celles-ci dans les verrous de connexion de tige en acier, qui se font face l'un à l'autre ; des unités d'ancrage d'élément de précontrainte sont montées et positionnées sur les parties creuses de remplissage en béton au niveau des deux parties d'extrémité du corps principal de plaque de plancher de façon à être supportées sur les plaques d'extrémité ; et un élément de précontrainte est monté de telle sorte que les deux extrémités de celui-ci sont connectées aux côtés de l'unité d'ancrage d'élément de précontrainte et précontraintes par ceux-ci et, simultanément, la section restante est positionnée pour venir en contact avec les surfaces inférieures des tiges en acier de positionnement d'élément de précontrainte, qui se trouvent en deux endroits, de manière à empêcher la force ascendante de l'élément de précontrainte.
PCT/KR2015/001969 2015-01-23 2015-02-27 Système d'ancrage d'élément de précontrainte d'un plancher résistant au feu à longue portée précontraint et ancré sur une partie d'extrémité de plancher, et son procédé de construction WO2016117753A1 (fr)

Priority Applications (1)

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CN201580001434.6A CN106030003B (zh) 2015-01-23 2015-02-27 张拉锚固到楼承板端部的大跨度耐火楼承板的钢筋束锚固系统及其施工方法

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KR1020150011117A KR101646866B1 (ko) 2015-01-23 2015-01-23 데크 단부에서 긴장 정착시킨 장스팬 내화 데크의 긴장재 정착시스템 및 그 시공방법
KR10-2015-0011117 2015-01-23

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CN114753655A (zh) * 2022-05-13 2022-07-15 河海大学 双向同时张拉的多层预应力纤维布加固装置及加固方法
CN114961325A (zh) * 2022-06-28 2022-08-30 中维建研(江苏)设计有限公司 一种预应力加固混凝土垃圾仓结构的方法

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CN114961325B (zh) * 2022-06-28 2024-02-02 中维建研(江苏)设计有限公司 一种预应力加固混凝土垃圾仓结构的方法

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KR101646866B1 (ko) 2016-08-09
CN106030003A (zh) 2016-10-12
KR20160091476A (ko) 2016-08-03

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