KR100784885B1 - Composite girder with steel truss web having hinge connecting, and connection structure thereof - Google Patents

Abstract

A composite girder with a steel truss web having a diagonal member fitting type hinge connecting structure and a connecting structure for the point thereof are provided to achieve improvement in assembly of diagonal members and upper and lower flanges, to form a firm connecting structure of diagonal members and to prevent the buckling of diagonal members by assembling diagonal members by a hinge, burying under upper and lower flanges and making concrete flow in the diagonal members. A composite girder with a steel truss web having a diagonal member fitting type hinge connecting structure is formed by connecting diagonal members(1) by a hinge at the point where diagonal members are coupled with an upper or a lower flange by forming a hinge plate(2) on each connection between diagonal members, placing hinge plates of two diagonal members to overlap each other and installing a hinge pin(3) through the hinge plate, wherein the diagonal members connected by the hinge pin are installed between reinforcing bars(130) for upper and lower flanges and buried under concrete of the upper and lower flanges to shear-connect the upper and lower flanges integrally with the diagonal members, thereby to secure a space enough to make concrete flow in the connection between the reinforcing bar and the diagonal member.

Description

Composite Girder with Steel Truss Web having Hinge Connecting, and Connection Structure Technical

1 is a schematic perspective view of a bridge constructed using a conventional abdominal truss composite girder.

FIG. 2A is a schematic partial side view showing a connection structure at a gap point where sand material is coupled to a lower flange in a conventional abdominal truss composite girder; FIG.

FIG. 2B is a cross-sectional view taken along the line C-C of FIG. 2A.

Figure 3 is a schematic perspective view showing a state in which the sand material is arranged in the truss structure in the state of assembling the reinforcing bars for the upper and lower flanges to manufacture the abdominal truss composite girder according to the present invention.

Figure 4a is a perspective view showing in detail the hinge connection structure of the yarn in the present invention, Figure 4b is a perspective view showing the hinge plate of the hinged state in the present invention.

5 is a schematic side view of an abdominal truss composite girder in accordance with the present invention.

<Description of the symbols for the main parts of the drawings>

1 Material 2 Hinge Plate

3 Hinge pins 4 Internal finish plate

11 cutout

The present invention relates to an abdominal truss composite girder and its junction structure, specifically, the upper flange and the lower flange is made of concrete and the abdomen is made of steel truss structure of abdominal truss composite girders composed of steel, In forming the connecting point of the lower point where the flange is connected, the sand material is connected to the hinge so as to be rotatable, then assembled and embedded in the upper and lower flanges. The present invention relates to an abdominal truss composite girder and its junction structure, which has a new type of junction structure, which can improve the field assembly of the structure and achieve a rigid connection structure and also prevent the buckling of the material.

In the conventional reinforced concrete girder or prestressed concrete girder, the abdomen between the upper and lower flanges has a problem in that it is actually designed to be unnecessarily large compared to its structural necessity. In order to solve these shortcomings, an abdominal truss composite girder has been proposed, in which the concrete abdomen is replaced with a truss structure made of steel sand, and such an abdominal truss composite girder is noted as a bridge girder with a stop. Is getting.

Figure 1 is a schematic perspective view of a bridge using an abdominal truss composite girder, as described above, the abdominal truss composite girder 100 is the abdomen between the upper flange 101 and the lower flange 102 is made of steel ( 103) is made of a truss structure. Therefore, in such an abdominal truss composite girder, how to configure the connection structure at the junction where the yarn 103 and the upper flange 101 or the lower flange 102 is coupled is very important.

FIG. 2A is a schematic partial side view showing the connection structure at the gap point where the yarn 103 is coupled to the lower flange 102 in the conventional abdominal truss composite girder, and FIG. 2B is a sectional view taken along the line CC of FIG. 2A. to be. Conventionally, the connection structure of the steel form using the gusset plate 110 and the shear stud 120 is used as a connection structure between the yarn 103 at the gap point, as shown in the figure, both sides of the yarn is inclinedly arranged 103 is connected to the gusset plate 110 by bolt coupling at the end of each of the junctions, thereby being connected to each other in the form of steel.

As described above, in the conventional abdominal truss composite girder, the yarn 103 is not rotated or vertically or horizontally displaced with respect to the gusset plate 110 before the abdomen having the truss structure is engaged with the upper and lower flanges. It is combined in the form of not possible steel, the connection structure of such a steel construction occurs the following inconvenience in construction.

When connecting the previously cut yarn 103 to the gusset plate 110, the inclination of the inclined plane of the end of the yarn 103 does not coincide with the bolting hole formed in the gusset plate 110. In this case, it is impossible to bolt the end of the yarn material 103 and the gusset plate 110 itself.

In addition, the plurality of yarn 103 is connected to the gusset plate 110 in advance to make the abdomen in the form of a unit of a predetermined length to transfer to the site, in the field to assemble a plurality of abdominal units in the longitudinal direction suitable for the entire bridge area There is a case in which the abdominal unit manufactured in the factory in the process of transporting the stress in the joint portion of the yarn material 103 and gusset plate 110 in the process of transfer to the site, the previously bonded material material 103 and gusset plate If the steel connection of the 110 is broken and frequently need to repair the gusset plate, replace the bolt, or change the welding method in the field.

In addition, the end of the yarn material 103 may be combined with the gusset plate 110 by welding. In this case, the welding work in the field is not only a cumbersome work that is costly and laborious, but also requires welding work in the air due to the nature of the bridge. This is a very dangerous task. In addition, such welding work in the field also has a problem that causes thermal deformation in the yarn material (103).

On the other hand, in the prior art as described above, the gusset plate 110 is sheared connected integrally with the upper and lower flanges in the state in which both sides of the yarn 103 is connected in a steel form by the gusset plate 110 to the yarn 103 The abdomen of the truss structure thus formed is integral with the upper and lower flanges. For this purpose, the gusset plate 110 should be shear-connected integrally with the concrete of the upper and lower flanges, and the shear stud 120 is installed on the outer surface of the gusset plate 110 for this shear connection.

In general, rebar is densely arranged in the upper and lower flanges. When the gusset plate 110 is shear-connected with the upper and lower flanges using the shear stud 120, the rebar is tightly interposed between the reinforcing bars of the upper and lower flanges. Shear stud 120 is inevitably located in the position. Therefore, when the concrete for the upper and lower flanges, when the shear stud 120 is present, there is a problem that the concrete is not properly filled between the reinforcing bar and between the shear stud 120 and the reinforcing bar .

After all, in order to prevent such a problem, only the part where the gusset plate 110 is installed must use a method of using high-flow concrete or non-shrinkage mortar, and for this purpose, only the part should be blocked out or the concrete pouring work should be doubled. As a result, the workability is extremely degraded.

On the other hand, in the abdominal truss composite girder, one of the yarns of the two yarns connected to each other to support the tensile force and the other yarn to support the compressive force. Therefore, only a part of the shear stud 120 installed on the upper surface of the gusset plate connected in the form of steel is to function as a shear connector. That is, in the prior art in which the shear stud 120 is installed for the connection between the gusset plate 110 and the upper or lower flange, only a part of the shear stud 120 is fully functional, and the other portion is inefficient. There is a structural limitation that only the structural performance is exhibited.

In addition, the prior art described above, because a plurality of steel parts such as the shear stud 120, gusset plate 110 is used, there is a disadvantage that the material cost is further increased.

The present invention has been developed in order to solve the problems of the prior art as described above, because the connection structure in the form of a steel form between the yarn by the gusset plate at the junction where the yarn and the upper or lower flange of the abdominal truss composite girder is coupled The purpose is to prevent workability degradation during on-site assembly, and to solve the problems of thermal deformation and workability, and construction cost and air rise due to the site welding.

In addition, the present invention is a problem in that the gusset plate and the upper or lower flange is coupled by the shear stud in the prior art, that is, a problem to block out or double-pour the portion in order to use high flow concrete or non-shrink mortar And, it was developed to solve the problem that the function of the shear studs as a shear connection material is inhibited.

In addition, the present invention has been developed to solve the problem that the structural limitations of the prior art by the shear stud, that is to function as a shear connector is part of the shear stud and the rest is dead.

In the present invention, in order to achieve the above object, as the abdominal truss composite girder consisting of the abdomen made of the truss structure of the yarn consisting of the upper flange, the lower flange and the steel material, both the yarn connecting end and the upper and lower flanges connected to each other Hinge plate is coupled to each other, the hinge end of the yarn is provided; The hinge pins of the yarns are disposed to overlap each other, so that the hinge pins are installed through the overlapping hinge plates, so that the connecting ends of the yarns can be rotated between the yarns before being embedded in the upper flange or the lower flange. Configured; At the end of the lower end of the hinge plate is provided with an inner finishing plate located inside the yarn to close the cross section of the yarn; When the connecting end of the yarn is embedded in the concrete of the upper, lower flange, the abdominal truss characterized in that the concrete of the upper, lower flanges are introduced into the interior of the yarn and the concrete is filled up to the upper end of the inner finishing plate Compound girders are provided.

In the girder of the present invention, a cutout portion is formed at the connection end of the yarn, and the periphery of the hinge plate is fitted to the cutout portion so that the periphery thereof is joined.

In addition, in the present invention, in the abdominal truss composite girder consisting of the abdomen consisting of the upper truss, the lower flange and the steel truss structure made of steel material, the yarns connected to each other at its ends are connected to the upper flange or the lower flange, Both yarn connecting ends connected to each other are directly embedded in the concrete of the upper flange or the lower flange and are coupled to each other, and the hinge ends are respectively installed at the connecting ends of the yarn; The hinge pins of the yarns are disposed to overlap each other, so that the hinge pins are installed through the overlapping hinge plates, so that the connecting ends of the yarns can be rotated between the yarns before being embedded in the upper flange or the lower flange. Configured; End ends of the hinge plates are provided with inner finishing plates positioned inside the yarn to close the cross section of the yarn; When the connecting end of the yarn is embedded in the concrete of the upper, lower flanges, the concrete of the upper, lower flanges are introduced into the interior of the yarn, the abdominal truss, characterized in that the concrete is filled over the inner finish plate The junction structure of the composite girder is provided.

Hereinafter, with reference to the accompanying drawings will be described the configuration and effect of the abdominal truss composite girder according to an embodiment of the present invention.

Figure 3 is a schematic perspective view showing a state in which the yarn 1 is arranged in a truss structure in the state of assembling the reinforcing bars 130 for the upper and lower flanges to produce the abdominal truss composite girder according to the present invention 4A is a perspective view showing the hinge connection structure of the yarn 1 in detail, and FIG. 4B is a perspective view showing the hinge plate in the hinged state in the present invention. 5 is a schematic side view of an abdominal truss composite girder according to the present invention.

The abdominal truss composite girder according to the present invention also consists of a truss structure of the yarn 1 made of steel material in the abdomen between the upper flange 101 and the lower flange 102, unlike the prior art, the yarn 1 and the upper portion At the junction where the flange 101 or the lower flange 102 is coupled, the yarn 1 is connected to each other in the form of a hinge before the upper and lower flanges 101 and 102 are engaged. As can be seen in Figures 4a and 4b showing an embodiment of the present invention, the hinge plate 2 is formed at the connecting end of the yarn 1, respectively, and the hinge plates 2 of both yarns 1 are connected to each other. By installing the hinge pins 3 through the hinge plates 2 in a state in which they are overlapped, the yarns 1 are connected to each other in a hinge form so as to be rotatable with each other.

The lower end of the hinge plate 2 is inserted into the yarn 1 to a predetermined depth, the lower end of the hinge plate 2 is located inside the yarn 1 to close the cross section of the yarn 1 inside. The finishing plate 4 is provided, respectively. As shown in the drawing, the hinge plate 2 is formed with a cutout portion 11 in the yarn 1 so that the end of the hinge plate 2 is fitted into the cutout portion 11, and the periphery of the hinge plate 2 is welded or the like. It can be integrated with the yarn 1 by bonding by the method of.

Meanwhile, each yarn 1 may be transferred to the site and hinged, but if necessary, the abdominal unit having a predetermined length may be manufactured in the form of a truss using the yarn 1, and then these abdominal units may be transferred to the site. The abdominal units can also be connected to each other.

Thus, the connecting end of the yarn 1 connected in the hinge form is embedded in the concrete of the upper and lower flanges 101 and 102, as shown in Figure 5, so that the upper and lower flanges 101 and 102 and the abdomen It becomes one. At this time, the concrete of the upper and lower flanges (101, 102) is introduced into the interior of the yarn 1, the concrete is filled up to the upper side of the inner finishing plate (4) is filled. In this way, since the concrete is filled from the connecting end of the yarn 1 to a predetermined length, the connecting end of the yarn 1 is further reinforced to exert a buckling prevention effect at the end of the yarn 1.

As described above, in the present invention, before the truss-formed abdomen is engaged with the upper and lower flanges 101 and 102, the yarn 1 has a hinged connection structure at the gap point, so that both yarns ( In connecting 1) in the field or connecting the abdominal unit in the field in the field, it is very easy to adjust and connect the angles of the material 1 to each other. In the conventional case, since the yarn has a connection structure in the form of a steel, when the angle between the end surface of the yarn and the gusset plate joining surface does not match or the angles of the yarn on both abdominal units do not coincide with each other, Although very difficult and cumbersome, in the case of the present invention, since the yarn 1 has a hinged connection structure, it is very easy to adjust the angle of the yarn 1 and thus easily connect the neighboring yarn 1 to the field. There is an advantage that can be achieved.

In particular, in the process of transporting the abdominal unit manufactured in the factory to the site, even if the stress is concentrated on the connection end between the yarn (1), because the connection between the yarn (1) is made of a hinge can be rotated, the yarn (1) due to stress concentration There is an advantage that there is no risk of breakage of the connection at all. Furthermore, in the hinge-type connection structure as described above, since no welding work is required at the site, the workability can be improved by that, and thermal deformation of the material 1 by welding can be prevented. It will also be effective.

On the other hand, the hinge-shaped connecting structure of the yarn material 1 is inserted through the hinge pin (3) is also very easy to connect to the upper and lower flanges (101, 102). As shown in FIG. 3, in the present invention, the connecting end of the yarn 1 connected in the hinge form by the hinge pin 3 is directly between the reinforcing bars 130 for the upper and lower flanges 101 and 102. By inserting and installing to be embedded in the concrete of the upper and lower flanges (101, 102), the upper and lower flanges (101, 102) and the yarn (1) as well as the shear connection is integrally formed. Therefore, unlike the prior art using a shear stud, in the present invention it is possible to ensure a sufficient space for the concrete to be introduced between the reinforcing bar 130 and the yarn 1 connection. Therefore, when placing concrete for the upper and lower flanges (101, 102), the effect of being able to easily fill the gap point with the sand material (1) even with ordinary concrete, not high-flow concrete.

As described above, the present invention eliminates the need for cumbersome operations such as construction cost increase, blockout, and double casting of concrete according to the use of high-flow concrete, as in the prior art, thus improving workability and reducing construction cost and shortening air. You will also enjoy. In addition, since the connecting end of the sand material 1 is directly embedded in the concrete, a solid shear connection and integral between the upper and lower flanges 101 and 102 and the sand material 1 without loss of the function of the shear connection member at the junction. Can be combined.

In particular, the hinge pin (3) is disposed in the transverse direction in the upper and lower flanges (101, 102) and embedded in concrete, so that it also functions as a transverse reinforcing bar to further increase the rigidity of the upper and lower flanges Will be exercised. It is also possible to further extend the hinge pin 3 to a length greater than or equal to the transverse width of the upper and lower flanges. The later extended hinge pin 3 also functions as a transverse bracing member between the abdominal truss composite girder. Effect is exerted.

In addition, in the case of the present invention, since the connection structure between the material 1 is simple and the steel parts used are also simplified, it is also very advantageous in terms of material cost.

As described above, in the abdominal truss composite girder according to the present invention, at the junction where the yarn 1 and the upper or lower flange are coupled, the connecting end portions of both yarns 1 are hinged by the hinge pins 3. It has a structure that is embedded in the concrete of the upper or lower flanges (101, 102) in a structured state.

Before the connecting end of the yarn 1 is embedded in the concrete of the upper and lower flanges 101 and 102, it has a hinge-type connection structure which can be rotated as above, so that the respective yarns 1 are joined in the field, When joining the yarns 1 on both sides to connect the abdominal units made in advance to the truss structure with each other in the field, the angle of the yarns 1 can be easily adjusted, so that the sides of the yarns 1 between neighboring abdominal units 1 Field connection is easy.

In addition, when the material (1) is connected to each other in the field, no cumbersome on-site welding work is required, thereby preventing the heat deformation of the material, reducing the risk of work, simplifying the field work, cost reduction and air savings.

In addition, since it is possible to secure sufficient space for the concrete to be filled between the reinforcing bar 1 and the reinforcing bars 130 of the upper or lower flanges 101 and 102 at the gap point, the prior art is Branches have the advantage of being able to solve various difficulties.

In addition, it is possible to further increase the rigidity of the upper and lower flanges through the function of the transverse reinforcing bar of the hinge pin (3), and to further extend the hinge pin (3) in the transverse direction abdominal truss composite The function as a lateral bracing member between girders can also be exhibited.

In particular, since the upper end of the yarn 1 is filled with concrete to a predetermined depth, the rigidity of the end of the yarn 1 is further increased, and the buckling prevention effect is exerted.

In the above described the configuration and features of the present invention based on the embodiment according to the present invention, the present invention is not limited to this, it is possible to be freely modified according to the technical idea of the present invention.

Claims (4)

An abdominal truss composite girder composed of an abdomen consisting of a truss structure of an upper flange 101, a lower flange 102, and a yarn 1 made of steel, Hinge plates (2) are provided at the connecting ends of the yarns (1) at the junctions at which both ends of the yarns (1) connected to each other and the upper and lower flanges (101, 102) are coupled; The hinge pin 3 is installed through the overlapping hinge plate 2 in a state in which the hinge plates 2 of the yarn 1 overlap each other, so that the connecting end of the yarn 1 is connected to the upper flange ( 101) or configured to be rotatable between the yarn 1 in a state before being embedded in the lower flange 102; At the end of the lower end of the hinge plate (2) is provided with an inner finishing plate (4) located inside the yarn (1) to close the cross section of the yarn (1); When the connecting end of the yarn 1 is embedded in the concrete of the upper and lower flanges 101 and 102, the concrete of the upper and lower flanges 101 and 102 flows into the interior of the yarn 1 to close the interior. An abdominal truss composite girder, having a structure in which concrete is filled up to the upper side of the plate (4). The method of claim 1, A cutout portion 11 is formed at the connecting end of the yarn 1, Abdominal truss composite girder, characterized in that the periphery of the hinge plate (2) is joined in the state fitted to the cutout (11). In the abdominal truss composite girder composed of the upper truss 101, the lower flange 102 and the abdomen of the truss structure of the yarn 1 made of steel, the yarns 1 connected to each other at their ends are connected to the upper flange 101 or the lower part. As the connection structure of the gap portion coupled to the flange 102, The connecting ends of the two yarns (1) connected to each other are directly embedded in the concrete of the upper flange 101 or the lower flange 102, Hinge plates 2 are respectively installed at the connecting ends of the yarn 1; The hinge pin 3 is installed through the overlapping hinge plate 2 in a state in which the hinge plates 2 of the yarn 1 overlap each other, so that the connecting end of the yarn 1 is connected to the upper flange ( 101) or configured to be rotatable between the yarn 1 in a state before being embedded in the lower flange 102; At each end of the hinge plate (2) is provided with an inner finishing plate (4) positioned inside the yarn (1) to close the end face of the yarn (1); When the connecting end of the yarn 1 is embedded in the concrete of the upper and lower flanges 101 and 102, the concrete of the upper and lower flanges 101 and 102 flows into the interior of the yarn 1 to close the interior. The junction structure of the abdominal truss composite girder, characterized in that the plate (4) has a structure filled with concrete. The method of claim 3, A cutout portion 11 is formed at the connecting end of the yarn 1, The periphery connection structure of the abdominal truss composite girder, characterized in that the periphery is joined in the state that the end of the hinge plate (2) is fitted to the cutout (11).

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