KR101690995B1 - Truss member and structure with an infilled tube - Google Patents

Abstract

The present invention relates to a truss member with a filled steel tube which eliminates concern for buckling when applying a compressive force to support a large load, and distributes a tensile force applied to a connection plate when applying a tensile force to transfer the tensile force to a steel tube to effectively transfer stress at a nodal point. According to the present invention, the truss member with a filled steel tube comprises: a steel tube body whose inside is empty; a filler filled in the steel tube body; connection plates mounted on centers of both ends of the steel tube body to protrude to the outside; fixing plates integrated and extended from the connection plates, inserted into the steel tube body, and fixed in the filler; end plates to close ends of the steel tube body on a left and a right of the connection plates; and a load transfer member connecting the fixing plate on one side and the fixing plate on the other side to each other, wherein a third shear connector is mounted on an outer circumferential surface thereof.

Description

{Truss member and structure with an infilled tube}

The present invention relates to a packed steel tube truss member capable of supporting a large load without buckling when compressive force is applied and dispersing a tensile force acting on a connecting plate during a tensile force action to transmit the stress to the steel pipe, Steel pipe truss structure.

The truss structure is constructed by connecting a long straight member such as a steel member to form a skeleton of a structure by connecting it with a triangle by a pin joint. The load is supported by compression or tensile of each member (FIG.

Since the truss structure supports the load by the axial force, the truss structure has a relatively large strength against the amount of steel used. Therefore, it is lightweight and can support a large load, and is used as a roof frame of a long span structure, a bridge top plate, and the like.

The truss structure T generally comprises an upper phase current T1 and a lower phase current T2 and a workpiece T3 connecting them.

However, such a steel exhibits a sufficient strength for tensile force, but there is a possibility that buckling is likely to occur when a compressive force is applied, so that the sectional strength can not be sufficiently exhibited.

However, in this case, the construction is complicated and the cost is increased, which is uneconomical in terms of air and construction cost.

In addition, when the truss member is subjected to a tensile force, stress is concentrated locally at the ends of the adjacent truss members and the joints of the connecting plates, resulting in a problem that the load is not properly transmitted.

KR 10-0929011 B1

An object of the present invention is to provide a filled steel pipe truss member and a filled steel pipe truss structure capable of supporting a large load without buckling when a compressive force acts.

An object of the present invention is to provide a packed steel tube truss structure and a packed steel tube truss structure capable of smoothly transmitting stress at a joint between neighboring truss members by appropriately distributing tensile force acting on a connecting plate during tensile force action.

According to a preferred embodiment of the present invention, A filler filled in the interior of the steel pipe body; A connecting plate coupled to the center of both ends of the steel pipe body so as to protrude outwardly; A fixing plate extending integrally from the connection plate and inserted into the interior of the steel pipe main body and fixed inside the filler; A tailgate plate that closes an end of the steel pipe main body at the right and left sides of the connecting plate; And a load transmission member to which the one side fixation plate and the other side fixation plate are connected to each other and the third shear connection member is coupled to the outer circumference surface; The present invention provides a filled steel pipe truss member.

According to another preferred embodiment of the present invention, there is provided a filled steel pipe truss member characterized in that the fusing plate is coupled with a first shear connection member embedded in a filler.

According to another preferred embodiment of the present invention, the first shear connector is coupled to penetrate the tubular body and the fixing plate.

According to another preferred embodiment of the present invention, there is provided a filled steel pipe truss member characterized by further comprising a second shear connection member which is inserted into the filling material through the steel pipe main body.

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According to another preferred embodiment of the present invention, there is provided a filled steel pipe truss member, wherein engaging plates are respectively coupled to both sides of the fixing plate so as to be spaced apart from each other by a predetermined distance, and the load transmitting member is coupled to the engaging plate.

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According to another preferred embodiment of the present invention, there is provided a truss structure comprising upper, lower, and lower ends joined to each other between the upper and lower ends, wherein the work is a filled steel pipe truss member, At least one or more of the present invention is an empty steel pipe main body having a hollow interior; A filler filled in the interior of the steel pipe body; A pair of end plates for closing both ends of the steel pipe main body; And a load transmitting member which is provided in the inside of the steel pipe main body and is embedded in the filler and has both ends thereof coupled to the pair of swash plate, respectively; The present invention provides a filled steel pipe truss structure.

According to the present invention, the fixing plate formed integrally with the connecting plate located at the node of the truss extends into the interior of the steel pipe body and is integrated with the filler. Therefore, not only the stress acting on the connecting plate is transmitted to the end of the steel pipe body through the crowbar plate, but also by the fusing plate, while being transmitted over the steel pipe main body and the end portion of the end portion of the filler.

Accordingly, when the truss member is operated by the compressive force, it can support a large load without buckling due to the synthetic action of the body of the steel pipe and the filler.

In addition, when tensile force acts on the truss member, tensile force acting on the connecting plate is uniformly dispersed and transmitted to the steel pipe main body, so that the problem of the existing truss member due to stress concentration at the joint can be solved.

1 is a front view showing a truss structure;
2 is a perspective view showing an embodiment of a filled steel tube truss member according to the present invention.
3 is a perspective view showing a process of joining a fixing plate and a steel pipe main body.
4 is a perspective view showing another embodiment of a filled steel tube truss member according to the present invention.
Fig. 5 is a longitudinal sectional view showing an embodiment of a filled steel pipe truss member of the present invention provided with a first shear connector; Fig.
6 is a longitudinal sectional view showing another embodiment of the filled steel pipe truss member of the present invention provided with the first shear connector.
7 is a cross-sectional view illustrating embodiments of a filled steel tube truss member of the present invention having a second shear connector.
8 is a perspective view showing a filled steel pipe truss member of the present invention provided with a load transmitting member;
9 is a cross-sectional view showing embodiments of a filled steel tube truss member of the present invention provided with a load transmitting member.
10 is a perspective view showing a load transmitting member coupled to a coupling plate;
11 is a perspective view showing embodiments of a load transfer member to which a third shear connector is coupled;
Figs. 12 (a) and 12 (b) are a side sectional view and a cross-sectional view, respectively, showing a top current or bottom current of a filled steel tube truss structure.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.

FIG. 2 is a perspective view showing an embodiment of a filled steel tube truss member according to the present invention, FIG. 3 is a perspective view showing a fitting process of a fixing plate and a steel pipe body, .

As shown in FIGS. 2 to 4, the filled steel pipe truss member of the present invention comprises an empty steel pipe main body 1; A filler (2) filled in the interior of the steel pipe body (1); A connecting plate (3) coupled to the center of both ends of the steel pipe body (1) so as to project outwardly; A fixing plate 4 integrally extended from the connection plate 3 and inserted into the interior of the steel pipe body 1 to be fixed in the filler 2; A tailgate plate (5) for closing the ends of the steel pipe main body (1) at the left and right sides of the connecting plate (3); And a load transfer member (6) to which the third shear connection member (S3) is coupled to the outer circumferential surface by connecting one fixing plate (4) and the other fixing plate (4 '). . ≪ / RTI >

The steel pipe main body 1 may have a cross section of various shapes such as a circular shape and a square shape.

A space of a certain size is formed in the inside of the steel pipe body 1 to fill the filler 2.

The filler (2) may be concrete, non-shrinkable mortar, or the like.

Particularly, since the steel pipe main body 1 used as a truss member has a small sectional size, it is more preferable to use a non-shrinkable mortar.

The filler (2) can be injected at the end of the steel pipe body (1). In this case, after filling the filler 2, the end plate of the steel pipe body 1 can be closed by welding the fillet plate 5 to be described later.

As shown in FIG. 4, the filling material 2 may be injected through the injection hole 12 formed on the side surface of the steel pipe body 1 after the end plate 5 is previously attached to the end of the steel pipe body 1. In this case, a separate air hole 13 is formed in the side surface of the steel pipe main body 1 so that the air inside is discharged to the outside, so that the filler 2 can be filled tightly.

As described above, according to the present invention, it is possible to provide a truss member capable of exhibiting excellent characteristics in terms of rigidity, proof stress, deformation, etc. by the composite behavior of a steel material and concrete.

That is, the steel pipe main body 1 and the internal filler 2 resist the compressive force during the compression action. Particularly, since the filler 2 inside is constrained by the steel pipe body 1, the compressive strength and ductility are greatly increased. Accordingly, local buckling of the steel pipe main body 1 is unlikely to occur.

In addition, the heat resistance of the filler 2 to be filled therein improves the fire resistance.

The connecting plate 3 is coupled to the outside of the steel pipe body 1 at both ends of the steel pipe body 1.

The connecting plate 3 is formed at the center of both ends of the steel pipe body 1. In the embodiment of FIG. 2 and others, the connecting plate 3 is joined to the center of the steel pipe body 1 having a rectangular cross-

The connecting plate (3) transfers the load between adjacent truss members to the steel pipe main body (1) from a joint point of the truss member to a portion where one truss member is engaged with the other truss member.

A plurality of through holes may be previously formed in the connection plate 3 such that the connection plate 3 can be bolted to the connection plate 3 of another adjacent truss member.

The fixing plate 4 is integrally extended from the connecting plate 3 and inserted into the interior of the steel pipe body 1. [

The fixing plate 4 is fixed inside the filler 2 to be filled in the steel pipe main body 1.

2, the fixing plate 4 has a width corresponding to the inner diameter of the steel pipe body 1, and both end portions of the fixing plate 4 can be welded to the inner surface of the steel pipe body 1 .

3 (a) to 3 (b), the fixing plate 4 is formed so that its width is somewhat wider than the width of the steel tube main body 1, and both ends of the steel tube main body 1 are cut It is also possible to weld the steel pipe main body 1 after inserting the fixing plate 4 into the cut-out portion 11 formed.

In this case, the welding work of the steel pipe main body 1 and the fusing plate 4 can be carried out from outside the steel pipe main body 1, which is convenient for the operator to carry out the work.

The edge plate (5) closes the end of the steel pipe body (1) at the left and right sides of the connecting plate (3).

The edge plate (5) can be welded to the surface of the steel pipe body (1) which is joined to the end.

As described above, according to the present invention, the fixing plate 4 extending integrally with the connecting plate 3, which is the joint point of the truss, extends into the interior of the steel pipe body 1. [ Both side ends of the fixing plate 4 are joined to the steel pipe body 1 and both side surfaces of the fixing plate 4 are fixed to the inside of the filler 2.

The stress acting on the connecting plate 3 is not only transmitted to the end of the steel pipe body 1 through the striking plate 5 but also transmitted to the end of the steel pipe body 1 and the filler 2 by the fusing plate 4 Stress is dispersed across the length.

 Therefore, it is possible to support a large load without a buckling concern of the member during the compressive force acting on the truss member according to the present invention, and evenly disperse the tensile force acting on the connecting plate 3 when the tensile force acts, Stress transmission can be smoothly performed.

5 is a longitudinal sectional view showing an embodiment of a filled steel pipe truss member of the present invention provided with a first shear connection member.

As shown in FIG. 5, the fusing plate 4 may be coupled with a first shear connector S1 embedded in the filler material 2. As shown in FIG.

The first shear connection member S1 may be coupled to both sides of the fixing plate 4, or a plurality of the first shear connection members S1 may be coupled.

The first shear connecting member S1 is fixed inside the filler 2 to transmit the axial force of the connecting plate 3 to the filler 2 inside the steel pipe body 1. [

6 is a longitudinal sectional view showing another embodiment of the filled steel pipe truss member of the present invention provided with the first shear connection member.

As shown in FIG. 6, the first shear connector S1 may be coupled to the steel pipe body 1 and the fixing plate 4 so as to penetrate therethrough.

The first shear connection S1 not only integrates the fixing plate 4 and the steel pipe main body 1 but also transmits the axial force transmitted to the fixing plate 4 to the side surface of the steel pipe main body 1.

As a result, since the load is distributed and transmitted, the stress concentration occurring at the joint portion between the connecting plate 3 and the steel pipe body 1 can be reduced.

The first shear connection S1 may be formed of a bolt sequentially passing through one side of the steel pipe main body 1, the fixing plate 4 and the other side of the steel pipe main body 1 sequentially.

The head of the bolt and the nut fastened to the bolt body are tightly engaged with the side surface of the steel pipe body 1 to prevent the filler 2 inside the steel pipe body 1 from leaking to the outside.

A bolt through-hole is previously formed at a position corresponding to one side surface of the steel pipe main body 1 and the other side surface of the fixing plate 4 and the steel pipe main body 1 so that the first shear connecting member S1 can pass through You can.

7 is a cross-sectional view showing embodiments of a filled steel tube truss member of the present invention provided with a second shear connector.

7A to 7D, a second shear connection member S2, which is inserted into the filler 2 through the steel pipe main body 1, may be further provided.

The integral of the steel pipe main body 1 and the filler 2 is further improved by the engagement of the second shear connection member S2.

The second shear connection member S2 is formed of a metal material such as a bolt, a rivet, a reinforcing bar, a metal plate, or the like, which is inserted into the filler 2 through both side surfaces of the steel pipe body 1 facing each other, .

7 (d), the second shear connecting member S2 may be configured such that the screw is passed through only one side of the steel pipe main body 1 so that the ends of the screw are buried in the filler 2. [

The second shear connection member (S2) tightly engages with the side surface of the steel pipe body (1).

A through hole may be formed in a side surface of the steel pipe main body 1 so that the second shear connecting member S2 can pass through the steel pipe main body 1. [

FIG. 8 is a perspective view showing a filled steel pipe truss member of the present invention equipped with a load transmitting member, and FIG. 9 is a cross-sectional view showing embodiments of the filled steel pipe truss member of the present invention provided with a load transmitting member.

As shown in FIG. 8, one side fixing plate 4 and the other side fixing plate 4 'may be connected to each other by a load transmission member 6.

The connection plate 3 at both ends of the steel pipe main body 1 is mutually connected by the load transmission member 6 so that the load of the one connection plate 3 is transmitted to the other connection plate 3 ' Can be delivered directly.

The load transmitting member 6 may be a rod member such as a reinforcing bar or a steel bar.

The load transfer member 6 is welded to one side or both sides of the fusing plate 4, It is possible.

Figs. 9 (a) to 9 (c) show various embodiments of the load transfer member 6.

The load transfer member 6 is placed on one side of the fixing plate 4 as shown in Figs. 8 and 9A, or is welded to both sides of the fixing plate 4 as shown in Fig. can do.

It is also possible to couple the load transfer members 6 so as to be spaced apart from each other on one side or both sides of the fixing plate 4 as shown in FIG. 9 (c).

10 is a perspective view showing a load transmitting member coupled to the engaging plate;

10, coupling plates 41 are coupled to the fixing plate 4 at a predetermined interval, and the load transmitting member 6 is coupled to the coupling plate 41 .

In general, the truss member is interpreted to transmit the load only due to the expansion or compression of the tension, but the bending moment acts on the member to which the direct upper load is transferred as in the present invention. Also, when a relatively large axial force is applied, lateral buckling may occur due to sudden large deformation in the transverse direction.

The coupling plate 41 increases the bending stress of the truss member by making the load transmitting member 6 away from the fixing plate 4 at a predetermined interval, and is capable of coping with lateral buckling.

The engaging plate 41 can be coupled to the fixing plate 4 by a fixing member 4 having opposite ends facing each other and a separate connecting member coupled to a side portion of the engaging plate 41.

It is preferable that the load transmission member 6 is welded to the side surface of the coupling plate 41 and is coupled to the side surface of the coupling plate 41 facing the outside of the steel pipe body 1 as much as possible in consideration of workability .

Fig. 11 is a perspective view showing embodiments of the load transmission member to which the third shear connector is coupled. Fig.

11 (a) to 11 (b), a third shear connecting member S3 may be coupled to the outer circumferential surface of the load transmitting member 6. [

The third shear connecting member S3 is joined to the filler 2 so that the load transfer member 6 contributes to integrally move the filler 2.

The third shear connection member S3 may be formed of various materials or shapes and may be formed by welding a reinforcing piece to the side surface of the load transmission member 6 as shown in FIG. 11 (a) And a plurality of circular disks fixed through the load transmission member 6.

Fig. 12 (a) is a side sectional view showing the top or bottom current of the filled steel pipe truss structure, and Fig. 12 (b) is a cross sectional view taken along the line A-A 'in Fig.

The truss structure of a filled steel pipe truss structure according to the present invention is related to a truss structure T composed of an upper phase current (T1), a lower phase current (T2) and a workpiece (T3) coupled between the phase current (T1) , The workpiece T3 is a filled steel pipe truss member according to the present invention, and at least one of the upper current T1 and the lower current T2 has an inner hollow pipe body 1; A filler (2) filled in the interior of the steel pipe body (1); A pair of end plates (5) for closing both end portions of the steel pipe main body (1); And a load transmitting member (6) provided in the inside of the steel pipe main body (1) and embedded in the filler (2) and having both ends connected to the pair of end plates (5) respectively; . ≪ / RTI >

The filled steel pipe truss structure may be made of the steel pipe truss member filled with the invention as described above with reference to Figs. 2 to 11 as the workpiece T3.

However, axial force is mainly generated in the workpiece T3, but a relatively large bending stress is generated in the upper phase T1 and the lower phase T2. Therefore, any one or more of the phase current T1 and the lower phase T2 may be provided with a load transmission member 6 inside the steel pipe body 1 to resist the warpage.

12 (a) to 12 (b), the load transmission member 6 can be constructed of a reinforcing bar, and both ends of the load transmission member 6 are welded to the end plate 5 closing the both end portions of the steel pipe main body 1 Can be combined.

The inside of the steel pipe body 1 is filled with the filler 2, so that it is possible to sufficiently resist the occurrence of buckling when the compression force acts.

The end plate 5 is made larger in section than the end face of the steel pipe body 1 so that the end plate 5 protrudes outside the steel pipe body 1 and a plurality of The number of the reinforcing bars may be increased to increase the bending resistance of the phase current T1 or the bottom B2. Both ends of the further arranged reinforcing bars are welded to the striking plate 5.

1: Steel pipe body
11: incision
12: Steel pipe body injection hole
13: Air hole
2: Filler
3, 3 ': connecting plate
4, 4 ': Fixing plate
41: engaging plate
5:
6: Load transfer member
S1: First shear connector
S2: second shear connector
S3: Third shear connector
T: Truss structure
T1: Phase current
T2: bottom current
T3: Materials

Claims (8)

An inner hollow pipe body (1);
A filler (2) filled in the interior of the steel pipe body (1);
A connecting plate (3) coupled to the center of both ends of the steel pipe body (1) so as to project outwardly;
A fixing plate 4 integrally extended from the connection plate 3 and inserted into the interior of the steel pipe body 1 to be fixed in the filler 2;
A tailgate plate (5) for closing the ends of the steel pipe main body (1) at the left and right sides of the connecting plate (3); And
A load transfer member 6 to which the third shear connection member S3 is coupled to the outer circumferential surface by connecting one fixing plate 4 and the other fixing plate 4 'to each other; And a second end portion of said second end portion.
The method of claim 1,
Characterized in that the fusing plate (4) is joined to a first shear connection material (S1) embedded in the filler (2).
3. The method of claim 2,
Wherein the first shear connection member (S1) is coupled to penetrate the steel pipe body (1) and the fusing plate (4).
The method of claim 1,
And a second shear connection member (S2) penetrating the steel pipe main body (1) and embedded in the filler (2).
delete The method of claim 1,
Wherein the engaging plates 41 are coupled to the fixing plate 4 at a predetermined interval on both sides of the fixing plate 4 and the load transmitting member 6 is engaged with the engaging plate 41.
delete And a workpiece T3 coupled between the phase current (T1) and the bottom phase (T2) and between the phase current (T1) and the bottom phase (T2)
The workpiece T3 is a filled steel pipe truss member according to any one of claims 1 to 4 and 6,
At least one of the phase current (T1) and the bottom current (T2) includes an inner hollow pipe body (1); A filler (2) filled in the interior of the steel pipe body (1); A pair of end plates (5) for closing both end portions of the steel pipe main body (1); And a load transmitting member (6) provided in the inside of the steel pipe main body (1) and embedded in the filler (2) and having both ends connected to the pair of end plates (5) respectively; Wherein the truss structure is made of steel.

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