WO2016117753A1 - Tendon anchor system of long span fire-resistant deck prestressed and anchored on deck end part, and construction method thereof - Google Patents

Abstract

The present invention provides: a tendon anchor system of a long span fire-resistant deck prestressed and anchored on a deck end part, the tendon anchor system applying a bending displacement amount in the upward direction without damaging or breaking a deck plate, and making the arrangement direction of a tendon at the anchoring position thereof be consistent with the prestressing force direction; and a construction method thereof. A tendon anchor system of a long span fire-resistant deck prestressed and anchored on a deck end part, according to an appropriate embodiment aspect of the present invention, relates to a tendon anchor system for controlling, by a tendon, the deflection of a deck plate main body supported and provided on H-shaped steel beams, which face each other, and is characterized in that: the upward position elements of the deck plate includes one pair of steel rod support plates joined by bolts to two upwardly opened concrete-filling valley parts of the deck plate main body so as to face each other, steel rod connection latches respectively joined to the one pair of steel rod support plates, and tendon position steel rods placed by fitting the both ends thereof into the steel rod connection latches, which face each other; tendon anchor units are provided and positioned on the concrete-filling valley parts at the both end part sides of the deck plate main body so as to be supported on end plates; and a tendon is provided such that the both ends thereof are connected to and prestressed by the tendon anchor unit sides and, simultaneously, the remaining section is positioned to come into contact with the bottom surfaces of the tendon position steel rods, which are provided at two places, so as to hinder the ascending force of the tendon.

Description

Tension material fixing system and construction method of long span fireproof deck with tension settling at deck end

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 is known 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. In this case, since the slab is spread over the H-beams, there is a problem that the height of the entire floor system including the beams becomes very high compared to the reinforced concrete structure.

As an alternative to solve this problem, a slim floor method has been developed that can draw the maximum volume ratio within the limited height of the building. 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. In addition, since 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.

However, 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. In addition, to prevent sag, a separate copper bar must be installed, and a small beam must be installed in the middle, thereby degrading economic efficiency and constructability.

As a background technology of the present invention, Korean Patent Registration No. 10-1337326 (synthetic slab refractory method using a wire rope) has been proposed. It is installed between the beam and the deck plate, 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 Including; forming, so that the load transmitted from the deck plate is distributed to the beam via the wire rope to improve the fire resistance, 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, and 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.

However, 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. In addition, 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.

The tensioning material fixing system of the long span fireproof deck which tension-fixed in the deck edge part which concerns on suitable embodiment of this invention,

In the tension member fixing system for controlling the deflection of the deck plate body mounted on the H-beams opposed to each other with a tension member,

A pair of steel rod support plates joined by bolts to two concrete filling bones that are upwardly opened in the deck plate body and opposed to each other, and a steel rod connecting clasp which is respectively joined to a pair of steel rod support plates, for facing the steel rods A tension bar steel bar, which is fitted with both ends of the clasp, is configured as an upward point element of the deck plate;

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,

A fixing plate in close contact with both end sides of the deck plate body;

A fixing block joined to the fixing surface of the angle plate;

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.

In addition, the fixing plate is characterized by consisting of a section steel having a c-channel cross-section in the intermittent or continuous type.

In addition, the c-type end of the fixing plate is characterized in that it further comprises an inner bent end bent inward.

In addition, 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.

In addition, the angle square portion is characterized in that the filler is installed in the inner region for reinforcement.

In addition, the angle square portion is characterized in that the reinforcement wing is further bonded to reinforce the brace rigidity.

In addition, 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.

In addition, 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.

In addition, 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.

In addition, the tension member fixing unit,

A section steel having an L-shaped cross section in close contact with both ends of the deck plate body;

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.

In addition, the tension member fixing unit,

A section steel having an L-shaped cross section in close contact with both ends of the deck plate body;

A jig for tension point disposed inside the section steel;

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.

On the other hand, 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,

Arranging both ends of the deck plate body to be supported by the H-beams opposed to each other, and then fixing the bolt plates by welding or bolts;

Placing the tension member on the concrete filling bone of the deck plate body, and then placing the tension bar on the tension plate into the steel rod connection clasp installed on the concrete filling bone of the deck plate body;

Fixing the fixing plate to the copper plate using screw screws or bolts at both ends of the deck plate body to install the tension member fixing unit; And

And inserting both ends of the tension member into the fixing block of the tension member fixing unit, respectively, and tensioning the tension member to fix and fix the tension member to the fixing block using a wedge.

The construction method of the tension material fixing system of the long span fireproof deck which tension-fixed in the deck edge part which concerns on another suitable embodiment of this invention is

Arranging both ends of the deck plate body to be supported by the H-beams opposed to each other, and then fixing the bolt plates by welding or bolts;

Placing the tension member on the concrete filling bone of the deck plate body, and then placing the tension bar on the tension plate into the steel rod connection clasp installed on the concrete filling bone of the deck plate body;

Installing a tension fixing unit by fixing an L-shaped section steel to a copper plate using screw screws or bolts on both ends of the deck plate body; And

And inserting both ends of the tension member into the tension member point jig disposed in the inner side of the section steel of the tension member fixing unit, and tensioning the tension member to fix and fix the tension member to the tension point point jig using a wedge or a tension nut. It is characterized by being constructed.

According to the tension member fixing system of the long span fireproof deck tension-fixed at the deck end 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.

In addition, 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.

The following drawings, which are attached in this specification, illustrate the preferred embodiments of the present invention, and together with the detailed description thereof, serve to further understand the technical spirit of the present invention. It should not be construed as limited.

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.

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.

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.

Degree.

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.

In the following the present invention will be described in detail with reference to the embodiments shown in the accompanying drawings, but the embodiments presented are exemplary for a clear understanding of the present invention is not limited thereto.

As shown in Figures 1 to 3, 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. At this time, the angle square portion 311 may be configured intermittently or continuously as shown in FIG.

Also, in the case of the fixing plate 31 having the angled corner portion 311, 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. In another embodiment, as shown in FIG. 5B, the reinforcing blades 36 may be joined to both ends of the angle square portion 311. In this case, 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.

In another embodiment, as shown in Figure 5d, 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. In this case, 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.

Here, 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. .

Therefore, as shown in Figure 4, 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.

An example of the construction method of the long span fireproof deck plate to which the tension material fixing system of the long span fireproof deck plate which tension-fixed at the deck end comprised in this way is applied is demonstrated.

Deck Plate Body Installation

First, in the state where the H-beams 5 opposed to each other are installed on the steel column (not shown) as shown in FIG. 8A, 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.

At this time, 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.

Tension

Next, the tension member 40 is disposed.

First, 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.

Installation of tension member fixing unit

Then, 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. At this time, in the case of having the angle square portion 311, 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).

Tension tension settlement

Then, 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.

At this time, 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).

As a result, 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. At this time, the displacement amount may have as much as ℓ / 200 ~ ℓ / 250 with respect to the length ℓ of the deck plate body (10).

Due to this, the load that the deck plate body 10 receives after completion of the slab construction is transmitted to the tension member 40 through the tension bar steel bar 24, and the force transmitted to the tension member 40 is transmitted to the beam 5. There is a mechanism to prevent sag.

Concrete Slab Construction

Next, the concrete 200 is poured on the upper surface of the deck plate body 10. At this time, 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.

As such, 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.

In this way, 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.

In addition, when the angle square portion 311 is provided in the tension member fixing unit 30, the arrangement direction and the tension direction at the fixing point of the tension member 40 coincide with each other, so that the workability of the tension member 40 is improved and the tension efficiency is improved. .

On the other hand, as another embodiment applied to the present invention tension member fixing unit 30 can be configured as shown in Figure 9a and 9b. As shown in FIGS. 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. Tension member point jig 132 inserted and disposed in the 40, the fixing block 33 in close contact with the back surface of the tension material point jig 132, tapered to the fixing block 33 and the tension member 40 It may comprise a plurality of divided wedges 34 to secure the end of the wedge force.

In another embodiment, 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.

So far, the present invention has been described in detail with reference to the presented embodiments, but those skilled in the art may make various modifications and modifications without departing from the technical spirit of the present invention with reference to the presented embodiments. will be. The invention is not limited by the invention as such variations and modifications but only by the claims appended hereto.

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.

Claims (14)

In the tension member fixing system for controlling the deflection of the deck plate main body 10 supported by the H-beams 5 and 5 opposed to each other with the tension member 40, To the pair of steel bar support plates 20 and 20 which are bolted to two concrete filling bones 12 which are upwardly open of the deck plate body 10 and face each other, and to the pair of steel bar support plates 20 and 20. Steel rod connection clasps 22 and 22, which are joined to each other, and tension bar steel rods 24, which are fitted with both ends of the steel rod connection clasps 22 and 22 facing each other, as an upward point element of the deck plate. Configured; A tension member fixing unit 30 positioned at both ends of the concrete filling bone 12 of the deck plate main body 10 and supported by the copper plate 11 is installed; The tension member 40 is tensioned at both ends connected to the tension member fixing unit 30 side and at the same time is located in contact with the lower surface of the tension bar steel bar 24 installed in two places in the remaining section is installed so that the lifting support is exerted Tension material fixing system of long-span fireproof deck that tension-fixed at the deck end. The method of claim 1, The tension member fixing unit 30, A fixing plate 31 in close contact with both end sides of the deck plate body 10; A fixing block 33 joined to the fixing surface of the angle plate 32; The tension member fixing system of the long-span refractory deck tension-fixed at the end of the deck, characterized in that it comprises a plurality of wedges (34) divided into tapered to the fixing block (33) to fix the tension member (40) by wedge force. The method of claim 2, The fixing plate (31) is a tension material fixing system of the long-span refractory deck tension-fixed at the deck end, characterized in that consisting of a c-channel channel cross-section consisting of an intermittent or continuous. The method of claim 3, wherein The tension member fixing system of the long-span fire-resistant deck tension-fixed at the deck end, characterized in that the c-type end of the fixing plate 31 further includes an inner bent end (313) bent inwardly. The method of claim 2, The fixing plate 31 has an angle angle portion 311 to form a right angle with the direction of tension at the fixing point of the tension member 40, the angle angle portion 311 is characterized in that the deck is configured to intermittently or continuously Tension material fixing system of long span fireproof deck with tension fixing at the end. The method of claim 5, The angle square part 311 is a tension material fixing system of the long-span refractory deck is tension-fixed at the end of the deck, characterized in that the filler 35 is provided for reinforcement in the inner region. The method of claim 5, The angle square part 311 is a tension material fixing system of the long-span refractory deck tension-fixed at the deck end, characterized in that the reinforcement blades are further joined to reinforce the stiffness. The method of claim 1, The steel rod connection clasp 22 is made of a plate-like curved or bent, characterized in that the steel rod insertion hole (22a) that allows the insertion of the tension bar steel bar 24, characterized in that it is included Tension material fixing system of long span fireproof deck with tension settling at deck end. The method of claim 8, The steel rod connection clasp 22 has a cross-sectional shape of any one of the C-type, spiral type, c-type tension fixing system of the long-span refractory deck tension-fixed at the deck end. The method of claim 1, Deck end, characterized in that the front of the fixing plate 31 is further provided with a pair of fixing plate guide wings 31b opposed to guide the insertion of the fixing plate 31 in the concrete filling bone 12 Tension fixing system for long span fireproof decks. The method of claim 1, The tension member fixing unit 30, A section steel 131 having an L-shaped cross section in close contact with both ends of the deck plate body 10 of the deck plate body 10; A tension member point jig 132 inserted into the tension member 40 inwardly of the shape steel 131; A fixing block 33 in close contact with the rear surface of the tension member point jig 132; Tension fixing of the long span refractory deck tension-fixed at the end of the deck characterized in that it comprises a plurality of divided wedges (34) are tapered to the fixing block 33 to secure the end of the tension member 40 by wedge force. system. The method of claim 1, The tension member fixing unit 30, A section steel 131 having an L-shaped cross section in close contact with both ends of the deck plate body 10 of the deck plate body 10; A tension member point jig 132 disposed inside the shape steel 131; Tension material fixing of the long span fireproof deck tension-fixed at the deck end, characterized in that it comprises a tension nut 133 is located on the back surface of the tension material point jig 132 is screwed to the end of the tension material (40). system. Arranging both ends of the deck plate body 10 to be supported by the H-beams 5 opposed to each other, and then fixing them by bolts or welding; After the tension member 40 is disposed on the concrete filling bone 12 of the deck plate body 10, the tension bar 40 is placed on the concrete filling bone of the deck plate body 10. Inserting into the steel rod connecting clasps 22 and 22 installed at 12); Fixing the fixing plate 31 to the copper plate 11 using screw screws or bolts at both ends of the deck plate body 10 to install the tension member fixing unit 30; And Inserting both ends of the tension member 40 into the fixing block 33 of the tension member fixing unit 30, and tensioning the tension member 40 and fixing and fixing the tension member 40 to the fixing block 33 using the wedge 34. Tension material fixing construction method of the long-span refractory deck is tension-fixed at the deck end, characterized in that the construction including. Arranging both ends of the deck plate body 10 to be supported by the H-beams 5 opposed to each other, and then fixing them by bolts or welding; After the tension member 40 is disposed on the concrete filling bone 12 of the deck plate body 10, the tension bar 40 is placed on the concrete filling bone of the deck plate body 10. Inserting into the steel rod connecting clasps 22 and 22 installed at 12); Installing the tension member fixing unit 30 by fixing the section steel 131 having an L-shaped cross section at both ends of the deck plate body 10 to the copper plate 11 using a screw or bolt; And Both ends of the tension member 40 are respectively inserted into the tension member point jig 132 disposed inside the section steel 131 of the tension member fixing unit 30, and the tension member 40 is tensioned and then used for the wedge 34 or tension. Fixing and fixing the tension material fixing construction of the long span fireproof deck at the end of the deck characterized in that the construction; including the step of fixing and fixed to the tension point jig 132 using a nut (133).

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