KR101321699B1 - Composite truss beam using double tube type pipe member and bridge therewith - Google Patents

Abstract

PURPOSE: A steel composite truss beam using a double pipe, and a bridge using the same are provided to improve efficiency of a cross section by manufacturing an upper chord and a lower chord with a steel composite material. CONSTITUTION: A steel composite truss beam (100) using a double pipe comprises an upper chord (110), a lower chord (120), and a diagonal member (130). The upper chord is a double pipe and is filled with a filler inside. The lower chord is a double pipe and is filled with a filler inside, and is placed in the lower part of the upper chord. The diagonal member is a hollow tube and is installed between the upper chord and the lower chord. The upper chord and the lower chord include outer pipes (111,121), inner pipes (112,122), and inside interval members (113,123), and a filler (140). The inner pipes are placed inside the outer pipes at a certain interval. The inside interval members are placed on the surface of the inner pipes at a certain interval in a longitudinal direction so that the top surface contacts the outer pipes. The filler fills only a space between the upper chord and the lower chord so that the inside interval members can be buried, and then is hardened.

Description

COMPOSITE TRUSS BEAM USING DOUBLE TUBE TYPE PIPE MEMBER AND BRIDGE THEREWITH}

The present invention relates to a rigid composite truss beam using a double pipe and a bridge using the same. More specifically, it relates to a rigid composite truss beam which improves the efficiency of the cross section by filling the truss-shaped beam, in particular, a filling material such as concrete inside the double pipe by connecting the yarn between the upper and lower chords.

Figure 1a shows a concrete composite steel pipe truss associated with the present invention.

That is, the upper chord (10) and the lower chord (C) and the yarn (B) is composed of, the yarn (B) is connected and fixed at the nodal portion (butting part) of the upper chord (10) and the lower chord (C) In the truss beam, the lower chord (C) subjected to the tensile force due to the bending moment (M), and the yarn (C) coupled to the node of the lower chord (C) is formed as a round truss of the conventional truss beam, The sand material (C) is to be replaced by a concrete phase current (10) instead of the conventional circular steel pipe subjected to compressive stress.

At this time, the tendon 40 is disposed inside the lower chord B, and both ends of the lower chord B are installed so as to be settled after tension at both ends of the circular steel pipe. 42 is filled to a certain length d inside.

At this time, the upper chord 10 is a reinforced concrete 16, the reinforcing bar 14 is reinforcement, and the yarn (C) and the top chord 10 is connected to each other by a shear reinforcing connector (60).

Sasa and the lower chord 10 is not shown but will be connected by welding or the like.

Both ends of the concrete composite steel pipe truss according to Figure 1a can be seen that the end portion 30 is formed integrally with the phase current in the form of a closing plate formed of concrete.

This has the advantage of providing a composite beam that is economical and stable structure compared to the conventional steel truss beam.

However, if both sides of the side portion 30 and the upper chord 10 is made of concrete, and the length becomes longer, there is a problem that the self-weight is inevitably too large. There must be a disadvantage that it can only be complicated.

1B illustrates a double steel box girder 70.

The double steel box girder sets the inner steel box girder 72 to the outer box box girder 71 of the rectangular box shape, and the concrete in the spaced space between the outer box girder 71 and the inner box girder 72 It is prepared by putting the filler 73, such as.

At this time, the inner strong box girder 72 is suspended by bolts and nuts 74 on the bottom of the upper inner box girder 71 and installed through bolts 75 to install the inner strong box girder 72. It can be seen that is to be fixed to the inside of the outer strong box girder 71, it can be seen that a plurality of studs 76 are formed on the inner side of the outer strong box girder 71.

However, such a double steel box girder 70 is to form the entire cross section of the girder in the form of a double box, in fact, both side wall portions are small even if the need to be filled with concrete, it can be seen that the efficiency of the cross section is not great, such as filling the filler. .

Therefore, the present invention is to solve the problem of providing a more economically strong composite truss beam because the cross-sectional efficiency is good while utilizing the material properties of the upper and lower chords without a large weight.

In another aspect, the present invention is to provide a composite truss that can be manufactured in the present and lower chords collectively and easily install the yarn between the upper chord and the lower chord to enable a more economical composite truss production.

To this end,

First, in the steel composite truss beam composed of the upper chord, sand yarn and lower chord, the upper chord and the lower chord are formed in a double tube form to fill a filler such as concrete between the outer tube and the inner tube to extend in the longitudinal direction. .

At this time, the inner tube and the outer tube are installed by using a connecting member, an inner spacer serving as a spacer and a stud between the inner tube and the outer tube so that the inner tube and the outer tube can be integrated with each other.

Secondly, in the composite truss beam composed of upper and lower chords, the yarn is a hollow tube made of steel, and the inner tube and the outer tube, which are also made of steel, are welded or connected by fasteners such as bolts and nuts. It was possible to assemble the upper and lower strings and lower strings.

Third, in the upper and lower chords, prestressing by the tension member may be introduced in the pretensioning manner. This is because the gap between the inner tube and the outer tube is not so large that the prestress is introduced at the time of manufacture.

Fourth, the connection between the upper and lower chords connected to the sand is concentrated by increasing the separation distance between the upper and lower chords at the site where the local stresses can be concentrated, thereby increasing the thickness of the filled filler. It can effectively resist local stresses.

To this end,

Sangjeul filled with filler therein as a double tube; A lower chord filled with a filler inside the double pipe and disposed below the top chord; And a yarn installed between the upper chord and the lower chord as a hollow tube.

The upper and lower chords are outer view; An inner tube spaced apart from the inner tube; An inner spacing member disposed on the surface of the inner tube in a longitudinal direction and formed as a shape steel product having an upper surface contacting the outer tube; And a filler filled and cured only in the separation space between the upper chord and the lower chord so that the inner space is buried.

In addition, the present invention is such that the compression prestress is introduced by the tension member extending in the longitudinal direction inside the lower chord.

In another aspect, the present invention provides a bridge having a bottom plate formed on the top by producing a composite truss beam having an I-type or W-shaped cross section.

The composite truss beam according to the present invention can be made of a steel composite material and a steel composite material by the upper chord, the lower chord can enhance the efficiency of the cross section, and the filler is filled only between the outer and inner chords of the upper chord and the lower chord. By doing so, it is possible to minimize the increase in self weight.

In addition, because the upper and lower chords and yarns are made of steel, it is very easy to manufacture and assemble by manufacturing in advance in the factory.

In addition, the inner spacer installed inside the upper chord and lower chord can have the effect of reinforcing the top chord and the lower chord, so that the cross-section efficiency of the member becomes very large, which reduces the amount of steel used, thus providing a very economical composite truss beam. You can do it.

Figure 1a is a perspective view of a conventional concrete composite steel pipe truss,
Figure 1b is a cross-sectional view of a conventional double steel box girder,
Figure 2 is a perspective view of a composite composite truss beam of the present invention
Figure 3 is an enlarged perspective view of the tension member and the nodal portion installed in the rigid composite truss beam in the present invention,
4A and 4B are perspective views of Embodiments 1 and 2 of the rigid composite truss beam according to the present invention;
Figures 5a and 5b is a construction of the bridge using the first and second embodiments of the composite truss beam according to the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

[Steel Composite Truss Beam 100 of the Present Invention]

2 is a perspective view of the configuration of the rigid composite truss beam 100 of the present invention.

First, referring to FIG. 2, the rigid composite truss beam 100 is formed to include an upper chord 110, a lower chord 120, and a yarn 130.

First, the upper chord 110, the lower chord 120 and the yarn 130 are all to use a steel pipe, the upper chord and the lower chord is to be formed in a double tube form in particular, and the yarn is to be formed of a hollow tube.

First, the upper chord 110 is formed as a member extending in the same cross-sectional shape in the longitudinal direction, in particular, using a steel pipe as a double square tube.

The phase current 110 is an inner tube 112 is disposed inside the outer tube 111 so that the two square steel pipes are restrained from each other by the inner space 113 is connected.

At this time, the inner spacer 113 is installed to be fixed to the outer surface of the inner tube 112 by a plurality of spaced apart in the longitudinal direction using a section steel having a predetermined length, the outer tube on the upper surface of the inner spacer 113. The inner surface of the 111 is in contact with the inner tube 112 to the inner tube 112 is set to be fixed at regular intervals.

In addition, it can be seen that the inner spacer 113 reinforces the upper chord 110 by reinforcing the outer tube 111 and the inner tube 112 which are formed as empty spaces by using the shaped steel product.

In addition, the inner spacer 113 serves as a stud without interfering with the filling of the filling material 140 by using a thin plate-shaped steel.

Since the space between the outer tube 111 and the inner tube 112 is an empty space, and only the inner space 113 is set, the filler 140, such as concrete, is filled using the openings not shown to form the steel and the concrete. It is produced by phase present by synthesis.

The lower chord 120 is to be used in the same way as the upper chord 110.

That is, the inner tube 122 is disposed inside the outer tube 121 so that the two square steel pipes are constrained and connected to each other by the inner spacer 123 and the inner tube 112 inside the outer tube 111. It can be seen that the two square steel pipes are arranged constrained to each other by the inner spacer 123 is disposed.

In addition, the space between the outer 121 and the inner tube 122 is an empty space, so only the inner space 123 is set, and also fills the filler 140 such as concrete by using an opening not shown. It will be manufactured as a chord by the synthesis of concrete.

That is, it can be seen that the upper chord 110 and the lower chord 120 are manufactured by the same cross-sectional member, so that the production is very simple and easy to manufacture.

In particular, the lower chord 120 may increase the amount of steel for securing the bending rigidity as the length is extended, and the self-weight may be increased by the filler 140, so the factory uses the pretension tension member 200 as shown in FIG. Compression prestress is introduced.

As a result, the compression prestress can greatly increase the structural cross-sectional efficiency of the lower chord of the present invention, and the compressed prestress is introduced into the lower chord after the filler 140 is filled and cured.

The yarn 130 is to use a hollow tube such as a circular steel pipe when the load acts on the steel composite truss beam of the present invention because the yarn acts as a member for transferring the load from the upper chord to the lower chord It is installed as an inclined member in the longitudinal direction between the upper chord and the lower chord.

As a result, it can be seen that the steel composite beam of the present invention is manufactured in the form of a truss by the yarn 130.

At this time, the yarn 130 is a circular steel pipe, and both ends are connected to the bottom and top surfaces of the top chords 110 and 120 (nodes). Since the top chord and the bottom chord are rectangular steel pipes, the bottom and the top are formed in a horizontal plane, and thus the circular steel pipe The upper and lower ends of the phosphor 130 may be horizontally cut to simply connect each other (welding, etc.).

At this time, the connection part between the sand and the upper chord and the lower chord can be concentrated as a load transfer path, so it should usually be reinforced.

The present invention reinforces such reinforcement by forming a larger separation distance between the inner pipes 112 and 122 and the outer pipes 111 and 121 of the upper and lower chords, in particular, to increase the thickness of the filler 140.

That is, in the inner tube 122, the connection portion with the yarn 130 is formed to be concave so as to increase the separation distance with the outer tube so that the thickness of the filler 140 is increased so that the node can be easily reinforced. do.

The yarn 130 installed at both ends of the yarn 130 is preferably finished using a square steel pipe.

[Examples 1 and 2 of the Highly Composite Truss Beam 100 of the Present Invention]

4A and 4B show perspective views of Embodiments 1 and 2 of the rigid composite truss beam 100 of the present invention.

First, in the case of FIG. 4A, the steel composite truss beam 100 according to FIG. 2 described above is described. The upper chord 110 and the lower chord 120 are formed of a double square steel pipe, and a filler 140 such as concrete is formed therein. ) Is filled, and it can be seen that the yarn 130 is formed of a circular steel pipe between the upper and lower chords.

At this time, it can be seen that the tension member 200 is set in the lower chord 120 by the pretension method.

It can be seen that the steel composite truss beam 100 according to the first embodiment is manufactured in particular as an I type, but is manufactured as a cross-sectional shape similar to a kind of steel plate beam.

Next, in the case of FIG. 4B, the W-type composite truss beam 100 is illustrated. First, three phase currents 110 are disposed in parallel and horizontal connection pipes 150 are disposed therebetween to restrain each other. It can be seen that.

It can be seen that the horizontal connection pipe 150 is arranged to be spaced apart a plurality in the longitudinal direction.

That is, Figure 4b can be seen that a plurality of horizontal connection pipe 150 and the phase current 110 is arranged on the horizontal plane to play the role of phase current.

Next, the lower chord 120 has two double square tubes disposed in parallel, and the horizontal connection pipe 150 is disposed therebetween, thereby restraining each other.

In this case, the yarn 130 is connected to each of the upper and lower chords up and down as well can be seen that it is also installed using a circular tube, it can also be seen that a plurality of spaced apart in the longitudinal direction.

[Bridge using the composite truss beam 100 of the present invention]

Figures 5a and 5b respectively show the construction of the bridge using the composite truss beam 100 of the present invention.

First, according to FIG. 5A, it can be seen that the bridge using the I-type composite truss beam 100 of the present invention described above.

It can be seen that the three composite truss beams 100 are arranged in the transverse direction and the concrete slab 300 is formed on the composite truss beams 100.

At this time, the lower flange of each of the rigid composite truss beams 100 arranged in the transverse direction is constrained to each other using the horizontal beam (160).

The horizontal beam 160 is to use the horizontal connector 150 described above. Such a horizontal connecting member may be installed as a rectangular hollow tube by welding or the like on the side of the lower flange which is simply a rectangular double tube.

Thus, even in the construction of the bridge, the present, the bottom, the yarn, the horizontal connecting member and the horizontal beam can be seen that the uniform purchase and manufacture of the members can be made by using square or round steel pipe.

In such a bridge, it is possible to reduce the number of installation of the bin to be installed as compared to the case using the conventional PSC beam, it is possible to bridge construction by a few molds.

Figure 5b can be seen that the bridge using the W-type composite truss beam 100 of the present invention described above,

It can be seen that the two composite truss beams 100 are arranged in the transverse direction and the concrete slab 300 is formed on the composite truss beams 100.

At this time, between the lower flange of each of the rigid composite truss beams 100 arranged in the transverse direction to be constrained to each other using the horizontal beam 160.

Such bridges are particularly advantageous for curved bridges as a small number of molds.

The scope of the present invention is shown by the following claims rather than the above description, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included in the scope of the present invention. do.

For example, in the case of the upper chord, the lower chord may use a rectangular cross section as a double pipe, but may be one manufactured in the form of a circular cross section, and a yarn may also use a circular or rectangular cross section.

100: composite truss beam
110: present
120: the present
130: private
140: filling material
200: Tension material
300: bottom plate

Claims (6)

A phase current 110 filled with a filler therein as a double pipe;
Filler is filled therein as a double pipe and the lower chord 120 disposed below the top chord; And a yarn 130 installed between the upper chord and the lower chord as a hollow tube.
The upper chord 110 and the lower chord 120 are outer pipes (111, 121); Inner tubes 112 and 122 spaced apart from the outer tube; The inner tube (112, 122) is spaced in the longitudinal direction is disposed on the upper surface is in contact with the outer tube 121, the inner tube 112 inside the outer tube 111 is set to be fixed at a predetermined interval and fixed to the outer tube and Inner spacers 113 and 123 to allow the inner tube to be integrated with each other; And a filler 140 that is filled and cured only in the space between the outer tubes 111 and 121 and the inner tubes 112 and 122 so that the inner spacers 113 and 123 are buried.
The inner truss beam is characterized in that the inner rectangular tube (112, 122) is formed so that the inner portion of the yarn and the lower chord and the upper chord are filled with a larger filling thickness of the filled filler to reduce the inner diameter. The method of claim 1,
The rigid composite truss beam, characterized in that the compression prestress by the tension material is introduced by the tension material 200 is further arranged in the longitudinal direction inside the filler 140 formed in the lower chord. delete 3. The method according to claim 1 or 2,
The upper chord and the lower chord are arranged in parallel to be connected to each other by using a horizontal connecting pipe 150, and the yarn 130 is connected between the plurality of upper chords and the lower chord, respectively. Composite truss beam. A transverse beam 160 disposed between the rigid composite truss beams of claim 1 arranged in a plurality of transverse directions; And
And a bottom plate (300) formed on an upper side of the rigid composite truss beam constrained laterally by the horizontal beam (160). 6. The method of claim 5,
The upper choir and the lower chord use a square steel pipe, and the yarn and the horizontal beam are made using a composite steel truss beam, characterized in that the circular steel pipe or a square steel pipe to be manufactured.

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