KR101646866B1

KR101646866B1 - Tendon fixing system of long span fire resistance deck strained at deck end and construction method of the same

Info

Publication number: KR101646866B1
Application number: KR1020150011117A
Authority: KR
Inventors: 최성모
Original assignee: 서울시립대학교 산학협력단
Priority date: 2015-01-23
Filing date: 2015-01-23
Publication date: 2016-08-09
Also published as: WO2016117753A1; KR20160091476A; CN106030003B; CN106030003A

Abstract

The present invention can apply a bending displacement amount upwards without damaging or damaging the deck plate, and it is possible to fix the tensile member of the long span refractory deck which is tension-fixed at the end of the deck so that the arrangement direction at the fixing point of the tension member coincides with the direction of the tension force System and method of construction thereof. The tension member fixing system of the long span refractory deck subjected to tension fixation at the deck end according to a preferred embodiment of the present invention is a tension member fixing system for controlling deflection of a deck plate main body supported by H beams opposing each other with a tension member, A pair of reinforcing bars supported by the deck plate main body and opposed to each other at two locations of the concrete filling cores which are opened upwardly of the deck plate main body, The steel bar for the tension member which is straddled by the latch at both ends is constituted by the upward point element of the deck plate; A tensile fixing unit supported on the whorl plate and disposed in the concrete fill-in-cores on both sides of the deck plate body; The tension member is installed such that both ends of the tension member are connected to the side of the tension member fixing unit and are simultaneously brought into contact with the lower surface of the tension member point steel bar provided at two positions in the remaining section,

Description

Technical Field [0001] The present invention relates to a tension-fixing system for a long-span refractory deck which is tension-fixed at a deck end,

The present invention relates to a tension member fixing system for a long span fireproof deck, and more particularly to a tension member fixing system for a long span refractory deck capable of applying an upward bending displacement amount without damaging or damaging a deck plate at a deck end, And more particularly, to a tension member fixing system for a long span refractory deck which is tension-fixed at a deck end so that the deck can be easily fixed.

A steel composite beam system is known in which a slab is placed on an upper flange of an H-shaped beam, and a shear connection (shear stud) is provided on the beam upper flange of the slab and the H-shaped beam. In this case, since the slab is spread over the H-beam, there is a problem that the height of the entire floor system including the beam is much higher than that of the reinforced concrete structure.

As an alternative to solve this problem, a slim floor method has been developed which can maximize the volume ratio within a limited height of a building. This slim floor method is a general term for a composite floor slab method in which a slab is inserted into a steel frame and is installed. Asymmetric H-beam is used to increase the sectional efficiency of the beam and make the beam dance smaller than that of the existing one. Can be greatly reduced. In addition, since the slab is inserted into the web of the steel beam, it is possible to reduce the floor height relatively, improve the integrity of the bottom plate and the beam, eliminate the fireproof coating, and reduce the exterior material due to the reduction of the floor height.

However, when the deck plate is applied to the slab, when the operator or the heavy material acts on the deck plate, the deck plate becomes large in deflection, making it difficult to realize the long span. In addition, it is necessary to separately install a trowel to prevent sagging and to install a small beam in the middle, which reduces the economical efficiency and the workability.

Korean Patent Registration No. 10-1337326 (synthetic slab refractory method using wire rope) has been proposed as a background of the present invention. The deck plate is installed between the beam and the beam. The wire rope is connected to the middle portion of the deck plate so that both end portions of the deck plate are positioned above the deck plate. The deck plate includes a plurality of deck plates arranged in parallel to the deck plate, and the deck plate has a plurality of deck plates, And an end of the deck plate is supported by the lower flange of the beam, and each end of the wire rope is fixed to the upper flange upper surface of the beam by tensioning the other end of the wire so that the prestress is introduced in a post- So that the deck play So that the load transferred from the load is transmitted to the beam via the wire rope.

However, in the background art, since the wire rope support which is in contact with the wire rope is directly connected to the deck plate, the deck plate is torn during the tension fixing, so that it is difficult to apply the tension force properly. In addition, the wire rope is bent in the direction of the fixing point, so that the direction of tension does not coincide with each other.

Korean Registered Patent No. 10-1337326 (synthetic slab refractory method using wire rope)

The present invention can apply a bending displacement amount upwards without damaging or damaging the deck plate, and it is possible to fix the tensile member of the long span refractory deck which is tension-fixed at the end of the deck so that the arrangement direction at the fixing point of the tension member coincides with the direction of the tension force System and a construction method thereof.

The tension member fixing system of the long span refractory deck subjected to tension fixation at the deck end according to a preferred embodiment of the present invention,

A tension material fixing system for controlling deflection of a deck plate body supported by H beams opposing each other with a tensile material,

A pair of reinforcing bars supported by the deck plate main body and opposed to each other at two locations of the concrete filling cores which are opened upwardly of the deck plate main body, The steel bar for the tension member which is straddled by the latch at both ends is constituted by the upward point element of the deck plate;

A tensile fixing unit supported on the whorl plate and disposed in the concrete fill-in-cores on both sides of the deck plate body;

The tension member is installed such that both ends of the tension member are connected to the side of the tension member fixing unit and are simultaneously brought into contact with the lower surface of the tension member point steel bar provided at two positions in the remaining section,

Wherein the tension member fixing unit comprises:

A fusing plate closely adhered to both end portions of the deck plate main body;

A fixing block bonded to a fixing surface of the fixing plate;

And a plurality of divided wedges taper-coupled to the fixing block to fix the tension member with a wedge force.

Further, the fixing plate is characterized in that a section steel having a C-shaped channel cross-section is constructed as an intermittent type or a continuous type.

The fixing plate may further include an inwardly bent end portion bent inwardly at an end portion of the fixing plate.

In addition, the fixing plate may have angled angular portions at right angles to the tension direction at the fixing points of the tension members, and the angled angular portions are configured to be interrupted or continuous.

The angle square portion is characterized in that a filler is provided for reinforcement in an inner area thereof.

In addition, the angle square portion is further characterized in that a reinforcing wing is further joined to reinforce the support rigidity.

In addition, the steel bar connecting latch is formed in a curved or bent shape in a plate shape, and includes a steel bar insertion hole for allowing insertion of a steel bar for a tension member point.

In addition, the steel wire connecting latch has a cross-sectional shape of any one of a C-shape, a spiral shape, and a C-shape.

The fixing plate may further include a pair of fixing plate guide vanes which are opposed to each other to guide insertion of the fixing plate into the concrete filling groove.

On the other hand, a construction method of a tension member fixing system of a long span refractory deck subjected to tension fixation at a deck end according to a preferred embodiment of the present invention,

Placing the deck plate body opposite to each other in such a manner that both ends of the deck plate body are supported and fixed by bolts or welding;

Placing a tension member for a tension member point on a concrete fill-bone of a deck plate main body and then engaging a steel rod for a tension member point on a tension rod connecting hook provided on a concrete filling bone of the deck plate main body;

Fixing the fixing plate to both ends of the deck plate body using a screw or bolt to fix the fixing plate to the whorl plate; And

Inserting both ends of the tension member into the fixing block of the tension member fixing unit, tightening the tension member, and fixing the fixing member to the fixing block using the wedge.

According to the tension member fixing system of the long span fireproof deck subjected to the tension fixation at the deck end of the present invention, it is easy to install the tension member fixing unit on the end portion side igniter plate of the deck plate by using the fixing plate without welding, And the arrangement direction at the tension point can be made coincident with each other, thereby improving the tension efficiency.

Further, the steel rods for tension members are not directly coupled to the cross-section wall of the deck plate main body, but the force is transmitted through the steel rod support plate, so that the deck plate main body can be constructed without being torn or damaged.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view and partly enlarged view of a deck plate with a taut fixation system according to the present invention; FIG.
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 a line KK in Fig.
4 is a cross-sectional view taken along the line XX in Fig.
Figs. 5A to 5E are diagrams of installation states of various modifications of the tension member fixing unit according to the present invention. Fig.
6 is a view showing a continuous installation state of a tension member fixing unit applied to the present invention.
7 is a view showing various forms of a steel bar connecting latch according to the present invention.
FIG. 8 is a view showing a construction procedure of a deck plate on which a tension member fixing system according to the present invention is mounted; FIG.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

1 to 3, the tension member fixing system of the long span refractory deck plate is provided with an upward pointing element on the tec plate body 10 to support the tensile member 40 in the concrete filling trough 12 of the deck plate body 10 A pair of steel bar supporting plates 20 and 20 mounted at two positions in the longitudinal direction on the side wall of the concrete filling bar for the steel bar supporting plates 20 and 20, 22 and 22 and a reinforcing bar point steel rod 24 which is sandwiched between both ends of the opposing steel bar connecting latches 22 and 22.

The steel bar supporting plates 20 and 20 are disposed opposite to the side plates 101 positioned in the concrete filling cores of the tec plate main body 10 by bolts 27 and nut fastening. Thus, the steel bar supporting plates 20 and 20 are mounted on the tech plate body 10 by bolting, thereby preventing defective joining due to welding.

The steel bar connecting latch 22 is formed in a curved or bent shape and includes a steel bar insertion port 22a for allowing the insertion of the steel bar 24 for the tension member. Therefore, the steel bar connecting latch 22 may have any one of a spiral shape, a C shape and a C shape as shown in (a), (b) and (c) of FIG.

At the both end sides of the deck plate body 10, a tension member fixing unit 30 supported by the edge plate 11 is provided.

The tension member fixing unit 30 includes a fixing plate 31 which is in close contact with the both end-side end plates of the deck plate body 10, a fixing block 33 which is joined to the fixing surface of the fixing plate 31, And a plurality of divided wedges (34) tapered to the fixing block (33) to fix the tension member (40) with a wedge force.

1 and 5A, the fixing plate 31 may further include an angled prism 311 at a right angle to the tension direction at the fixing point of the tension member 40. [ At this time, the angled prism 311 may be configured intermittently or may be constructed as shown in FIG.

In the case of the fixing plate 31 having the angled prism 311, a filler 35 may be installed in the angled prism 311 for reinforcement as shown in FIG. 5A. The filler 35 may be cured by filling concrete mortar into the angled prism 311. In another embodiment, as shown in FIG. 5B, the reinforcing vanes 36 may be joined to both ends of the angled prism 311. At this time, the fixing plate 51 may be provided with a step 31a that is upwardly bent at the lower end. The step 31a can be utilized to mount fastening parts (screw threads, bolts, etc.) for fixing the fusing plate 31.

In another embodiment, as shown in FIG. 5D, the fixing plate 31 may be formed of a steel having a C-shaped channel cross-section, and may be of the intermittent type or continuous type. At this time, as shown in FIG. 5E, an inner bent end 313 bent inwardly at the C-shaped end of the fixing plate 31 may be further constructed. The inner folded end 313 can be utilized as a point of a hydraulic jack (not shown) when the tension member 40 is strained.

5A, a pair of fixing plate guide vanes 31a may be further installed on the front surface of the fixing plate 31 so as to guide the insertion of the fixing plate 31 into the concrete filling groove 12 .

4, both ends of the tensile material 40 are connected to the side of the tension member fixing unit 30, and at the same time, the tension member 40 for reinforcing the tensile strength of the tension member 40, which is provided at two places of the concrete filling troughs 12 of the deck plate body 10, Is placed in contact with the lower surface of the base plate (24) so as to exhibit a lifting force. The tension member 40 may be a steel wire, a lecture stand, a steel bar, or the like.

An example of a construction method of the long span refractory deck plate to which the tension member fixing system of the long span refractory deck plate subjected to tension fixation at the deck end thus configured is applied will be described.

Deck plate Body installation

8 (a), the both ends of the deck plate body 10 are connected to the H-shaped steel beams 5 (not shown) As shown in Fig. At this time, both end portions of the deck plate body 10 are stacked on the upper surface of the lower flange of the H-shaped beam 5 to be staggered. Thereafter, the deck plate body 10 is fixed to the H-shaped beam 5 through bolts or welding.

At this time, the deck plate body 10 is provided with a swash plate 11 to prepare for concrete pouring at both ends.

Tension arrangement

Then, the straining material 40 is placed.

The tension member 40 is disposed in the deck plate body 10 of the deck plate body 10 in such a manner that the tension member 40 is stretched in the deck plate body 10, (See Fig. 3) of the steel bar connecting latches 22 and 22 provided on the concrete filling trough 12 of the tie-

Tension Fusing unit installation

Next, a tension member fixing unit 30 is provided on both end sides of the deck plate body 10. [ The tension member fixing unit 30 is installed by fixing the fusing plate 31 to the whoreline 11 with a screw or bolt, as shown in FIG. At this time, in the case of having the angled prism 311, the tension member fixing unit 30 is installed such that the angled prism 311 is located on the extension line of the concrete filling trough 12.

Tension Tension settlement

The tension members 40 are then tensioned using a hydraulic jack (not shown) after both ends of the tension member 40 are inserted into the fixing block 33 of the tension member fixing unit 30, Fixed to the fixing block (60).

At this time, the tension member 40 coincides with the tension point at the fixing point, so that the tension member 40 is brought into contact with the two tension member point steel rods 24 due to the tension force thereof, (See FIG. 4).

As a result, the deck plate body 10 is formed with a constant camber angle at both ends thereof and has a certain amount of displacement rising upward from the center. At this time, the amount of displacement may be about ℓ / 200 to ℓ / 250 with respect to the length (ℓ) of the deck plate body 10.

The load to be received by the deck plate body 10 after the completion of the slab installation is transmitted to the tension member 40 through the tension member point steel bar 24 and the force transmitted to the tension member 40 is transmitted to the beam 5 So that a deflection-preventing mechanism is provided.

Concrete slab construction

Then, the concrete 200 is laid on the upper surface of the deck plate body 10. At this time, the height of the poured upper surface of the concrete is higher than the height of the upper surface of the deck plate body 10. Therefore, the poured concrete is cured by putting the tension member 40 and the tension member fixing unit 30 into a concrete slab.

Since the load of the slab to which the concrete is poured acts against the tensile force of the applied tension member 40, the deck plate body 10 is not deflected.

In this system, the steel rods 24 for tension members are not directly coupled to the end wall of the deck plate body 10 but transmit the force via the steel rod supporting plate 20, (Side plate) is not torn or damaged.

In the case where the angle-angled portion 311 is provided in the tension member fixing unit 30, the arrangement direction at the fixing point of the tension member 40 is aligned with the tension direction, thereby improving the workability of the tension member 40 and improving the tension efficiency .

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the above teachings. will be. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

20:
22: Clamp for connecting steel bars
24: Steel rods for tension members
30: Tensile fixing unit
31: Fixing plate
33: Fixing block
34: Wedge
35: filler
36: reinforcing wing
311: Angle square portion

Claims

A tension material fixing system for controlling deflection of a deck plate body (10) supported by H beams (5, 5) opposed to each other with a tensile member (40)
A pair of reinforcing steel support plates 20 and 20 which are bolted to and opposed to two places of the concrete filler cores 12 which are opened upward of the deck plate body 10 and a pair of reinforcing steel support plates 20 and 20, The steel bar connecting rods 24 and 22 which are both ends of the steel bar connecting rods 24 and 22 which are connected to the steel bar connecting latches 22 and 22 which are opposite to each other, Configured;
The deck plate 10 is placed on the concrete filler cores 12 at both ends of the deck plate body 10 and is supported on the whorl plate 11 and is brought into close contact with the whorl plate 11 and at right angles to the tension direction at the fixing point of the tensile material 40 The angle square portion 311 has an angle fixing portion 311 which is composed of a fixing plate 31 which is configured to be intermittently or continuously arranged, a fixing block 33 which is joined to the fixing surface of the angle square portion 311, A tension member fixing unit 30 is provided which is composed of a plurality of divided wedges 34 tapered to the fixing block 33 to fix the tension member 40 with a wedge force;
The tension member 40 is installed such that both ends of the tension member 40 are connected to the side of the tension member fixing unit 30 and at the same time they are brought into contact with the lower surface of the tension member point steel bar 24 installed at two places, A tension system fixing system of a long span refractory deck which is tension-fixed at the deck end.

delete

The method according to claim 1,
Characterized in that the angled prism (311) is provided with a filler (35) for reinforcing the inner area thereof. The tension member fixing system of the long span refractory deck in which the deck end is tension-fixed.

The method according to claim 1,
Wherein the angled prismatic portion (311) is further joined with a reinforcing vane (36) to reinforce the support rigidity.

The method according to claim 1,
The steel bar connecting latch 22 is formed in a curved or bent shape and includes a steel bar insertion port 22a for allowing the insertion of the steel bar 24 for a tension member. Tension fixation system for long span refractory decks tensioned at the deck end.

The method according to claim 1,
The tension member fixing system of the long span refractory deck in which the steel bar connecting latches (22) have a cross-sectional shape of C, spiral, or C shape.

The method according to claim 1,
And a pair of fixing plate guide vanes (31a) are further provided on the front surface of the fixing plate (31) so as to guide the insertion of the fixing plate (31) into the concrete filling trough (12) Tension Fixation System of Long Span Refractory Deck Tensioned by Tension.

Placing the deck plate body (10) so that both ends of the deck plate body (10) are supported on the H-shaped steel beams (5) opposed to each other, and then fixing them by bolts or welding;
The tension member 40 is arranged to be stretched on the concrete filling trough 12 of the deck plate body 10 and then the reinforcing steel bar 24 is placed above the tension member 40 to the concrete filling trough 12) a step of fitting the steel bar connecting latches (22, 22) bolted to two places and joined to a pair of opposing steel bar supporting plates (20, 20);
The angled prism 311 has an angular prism 311 that is intermittently or continuously arranged and an angular prism 311 that is perpendicular to the direction of the tension at the fixing point of the prism 40. The angle prism 311 has a non- And a plurality of divided wedges (34) taperedly coupled to the fixing block (33) to fix the tension member (40) with a wedge force, the fixing block (33) Fixing the fusing unit (30) by fixing the fusing plate (31) of the fusing unit (30) to the edge plates (11) by screw screws or bolts on both end sides of the deck plate body (10); And
The both ends of the tension member 40 are inserted into the fixing block 33 of the tension member fixing unit 30 and the tension member 40 is tightened and fixed to the fixing block 60 by using the wedge 34 The method of claim 1, wherein the tension span of the long span refractory deck is tensile.