KR20230005535A - Steel expansion joint for recipience of temperature displacement of steel structure - Google Patents

Abstract

The present invention provides a steel expansion joint for accepting the temperature displacement of a steel structure, which allows one steel of a steel joint portion to accept expansion and contraction due to temperature changes on the other steel, and has a closed cross section formed at the steel joint portion, thereby suppressing a lateral displacement and improving the cross-sectional rigidity of the steel joint portion. According to one embodiment of the present invention, the steel expansion joint for accepting the temperature displacement of a steel structure comprises: lateral displacement control panels installed on both sides of a joint portion of a first steel beam member so that end sections thereof face each other and are fixed by welding or bolting; an expansion joint lower square box located below the joint portions between the first steel beam member and a second steel beam member, and fastened to the lateral displacement control panels by welding or bolting to form a closed cross section with an expansion joint upper square box; and the expansion joint upper square box fastened to the lateral displacement control panels by welding or bolting after being located on the joint portions between the first and second steel beam members after the joint portion of the second steel beam member is slidably inserted between protruding sections of the lateral displacement control panels and supported on the expansion joint lower square box.

Description

Steel expansion joint for recipience of temperature displacement of steel structure}

The present invention relates to a steel expansion joint for accommodating the temperature displacement of a steel structure. In particular, one steel member of the steel joint accommodates the expansion movement according to the temperature change on the other steel member side, and at the same time, the steel joint is closed at the steel joint. This is formed to suppress lateral displacement and to improve the cross-sectional rigidity of the joint.

Recently, there are many types of structures using steel materials. There are temporary bridges for detours and construction, new construction of bicycle roads, long-span parking lots, sidewalk overpasses, underground roadways, and underground covering structures that install girders on retaining facilities to install roofing plates during construction of underground roads and covered tunnels.

In the case of temporary bridges, when the span is serialized, the span length (L) is usually configured within 100m. This is because the design cross section of the lower column at the start and end points becomes very large due to the temperature load generated during the design of the structure, and the economic cost loss is large as the cross section of the existing materials is enlarged.

Even if the cross-section of the upper girder is confirmed according to the design of the underground structure, if the girder is installed on the retaining pile or the support beam, the load transmitted to the lower part is significantly increased, so the cross-section of the retaining pile increases or the lower column for girder support is designed separately. Problems such as space reduction and economic cost loss become large.

Therefore, there is a need for new technical solutions for expansion joints that greatly reduce the load of the structure so that the continuous span of the structure can be configured with an optimized cross section, shorten the construction period by reducing the installation location of the substructure, and obtain economic savings. situation is becoming.

As a background technology of the present invention, Korea Patent Registration No. 10-2034502 proposes 'a temporary bridge that is not affected by temperature load using a slip plate and a departure prevention plate and a construction method thereof'. Here, the girders are fixedly coupled to some of the temporary vents so as not to move, and the rest are slidingly coupled to allow sliding in the longitudinal direction. The sliding coupling is a sliding plate installed between the support beam and the lower flange of the girder. , It includes a pair of separation prevention plates that prevent the separation of the girder, and bolts and nuts fastening the pair of separation prevention plates to the support beam. However, the background art is to have a sliding coupling structure of the girder by installing a sliding plate and a separation prevention plate on the upper surface of the supporting beam, and has a disadvantage that cannot be applied to the expansion joint structure of the joint in which the supporting beam is not installed.

Korea Patent Registration No. 10-2034502

The present invention allows the steel on either side of the steel joint to accommodate the expansion and contraction movement due to the temperature change on the other steel side, and at the same time, a closed cross section is formed at the steel joint to suppress lateral displacement and improve the cross-sectional rigidity of the joint. Its purpose is to provide an expansion joint.

A steel expansion joint for accommodating the temperature displacement of a steel structure according to an embodiment of the present invention is installed at a joint connecting first and second steel members having an H-shaped or I-shaped cross section, the first A transverse displacement control panel having one end sections facing each other on both sides of the joint of the shaped steel member and fixed by welding or bolts; An expansion joint lower square box that is located below the joint of the first and second steel members and is welded or bolted to the transverse displacement control panel to form an upper square box of the expansion joint and a closed cross section; After the joint of the second steel member is slidably inserted between the protruding sections of the transverse displacement control panel and supported by the lower square box of the expansion joint, it is located on the upper part of the joint of the first and second steel members to form a transverse displacement control panel. It is characterized by including; an upper square box of an expansion joint that is welded or bolted to.

In addition, the side sliding plates are further attached to the transverse displacement control panel so that the sliding movement according to the temperature change of the first and second steel members is smooth over the section overlapping the joint of the second steel member on the inner surface facing each other. to be characterized

In addition, the inner surfaces of the lower square box of the expansion joint and the upper square box of the expansion joint, which are in contact with the joint of the second section steel member, have a lower sliding plate and an upper sliding plate respectively so that the sliding movement according to the temperature change of the first and second section members is smooth. It is characterized in that the sliding plate is further attached.

In addition, the lower square box of the expansion joint is characterized in that wings for bonding the lower square box are formed on both sides, and the upper square box of the expansion joint is characterized in that wings for bonding the upper square box are formed.

On the other hand, in the steel expansion joint for accommodating the temperature displacement of the steel structure according to another embodiment of the present invention, plate-shaped joint joint wings are configured on both sides of the joint side of the first steel pipe member; An expansion joint lower semicircular box having one end located at the lower portion of the joint of the first steel pipe member and coupled to the joint wing by welding or bolts to form a closed cross section with the upper semicircular box of the expansion joint; In the state where the joint of the second steel pipe member is supported on the other end of the lower half-circle box of the expansion joint, it is located on the upper part of the joint of the first and second steel pipe members and is welded or bolted to the joint joint wing to lower the shaft joint joint. It is characterized by including; a semicircular box and an upper semicircular box of an expansion joint forming a closed cross section.

In addition, on both sides of the lower half-circle box of the expansion joint, wings for joining the lower half-circle box are formed on both sides, and on the upper half-circle box of the expansion joint, wings for joining the upper square box to be joined with the joining wing of the joint are formed. It is characterized in that is formed.

In addition, semicircular sliding plates are attached to the lower semicircular box of the expansion joint and the upper semicircular box of the expansion joint so that the sliding movement according to the temperature change of the first and second steel pipe members is smooth over the section overlapping the joint of the second steel pipe member. It is characterized by being.

According to the steel expansion joint of the present invention, the expansion movement according to the temperature change on the other steel side of the steel joint can be accommodated to reduce the temperature load. In addition, a closed cross section is formed at the steel joint to suppress lateral displacement and improve the cross-sectional rigidity of the joint, which is advantageous for the continuity of steel structures. Therefore, steel expansion joint joints can be usefully applied to steel structures such as temporary bridges, construction facilities, parking lots, pedestrian bridges, and bicycle roads.

The following drawings attached to this specification illustrate a preferred embodiment of the present invention, and together with the detailed description of the present invention serve to further understand the technical idea of the present invention, the present invention is limited to those described in the accompanying drawings. It should not be construed as limiting.
1 is a perspective view of an installed steel expansion joint according to an embodiment of the present invention;
2 is a cross-sectional view taken along line AA of FIG. 1;
Figure 3 is an exploded perspective view of Figure 1;
Figures 4a and 4b is an assembly flow chart of a steel expansion joint according to an embodiment of the present invention.
Figure 5 is a perspective view of the installation of a steel expansion joint according to another embodiment of the present invention.
6 is a cross-sectional view taken along line BB of FIG. 5;
Figures 7a to 7c is an assembly flow chart of a steel expansion joint according to another embodiment of the present invention.

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

The steel expansion joint according to the present invention may be implemented in two types according to the cross-sectional shape of a steel member installed in a steel structure, for example, a temporary bridge, a construction facility, a parking lot, a pedestrian bridge, a bicycle road, etc.

<First Embodiment>

First, the steel expansion joint 20 installed at the joint of the first and second steel members 11 and 12 having an H-shaped or I-shaped cross section as shown in FIGS. 1 to 3 will be described.

In the steel expansion joint 20, transverse displacement control panels 22 and 22 are installed on both sides of the joint of the first section steel member 11 so that one end sections face each other and are fixed by welding or bolts. The transverse displacement control panels 22 and 22 are installed vertically and bonded to the transverse displacement control unit 221 bonded to the abdomen of the first shaped steel member 11, and the control panel bonded to the transverse displacement control unit 221 in a right angle direction. It has wings 222 and forms a T-shaped cross section. The transverse displacement control plates 22 and 22 may be made of steel. At this time, the transverse displacement control unit 221 and the control panel bonding wings 222 may be connected to each other through reinforcing ribs 223 to be reinforced. Accordingly, the transverse displacement control units 22 and 22 suppress the transverse displacement of the steel beam members 11 and 12 by means of the transverse displacement control unit 221 .

An expansion joint lower square box 24 is installed below the joint of the first and second steel members 11 and 12 and is welded or bolted to the transverse displacement control panels 22 and 22. The expansion joint joint lower square box 24 has a square cross section, and wings 242 for joining the lower square box are formed on both sides of each side to be joined with the transverse displacement control panels 22 and 22. The expansion joint lower square box 24 forms a closed cross section with the expansion joint upper square box 26 to be described later to increase cross-sectional rigidity.

An upper square box 26 of an expansion joint joint is installed above the joints of the first and second steel members 11 and 12 and is welded or bolted to the transverse displacement control panels 22 and 22. The expansion joint upper square box 26 may be coupled to the expansion joint lower square box 24 through bolt coupling through the transverse displacement control panel 22 inserted therethrough. At this time, the joint of the second steel member 12 is slidably inserted between the protruding sections of the transverse displacement control panels 22 and 22 and is supported and installed by the lower square box 24 of the expansion joint. Preferably, the second steel member 12 is installed to have a constant gap with the first steel member 11 in consideration of expansion and contraction due to temperature change at the joint. The expansion joint joint upper square box 26 has a square cross section, and it is preferable that wings 262 for bonding the upper square box are formed on both sides of each side for bonding with the transverse displacement control panels 22 and 22.

On the other hand, the transverse displacement control panels 22 and 22 may be configured by further attaching hard sliding plates 23 or rubber plates to the surfaces facing each other over the section overlapping the joint of the second steel member 12. there is. In this case, the second shaped steel member 12 can more smoothly expand and contract according to temperature change, thereby reducing stress generation.

In addition, the inner surfaces of the lower square box 24 of the expansion joint joint and the upper square box 26 of the expansion joint joint in contact with the joint of the second section steel member 12 are more smoothly expanded according to the temperature change to reduce stress generation In order to do so, a hard sliding plate 23 or a rubber plate may be further attached to each other.

In the steel expansion joint 20 configured as described above, as shown in FIG. 4A, the transverse displacement control panels 22 and 22 are located on both sides of the joint of the first section steel member 11, with one end sections facing each other, and welded or bolted fixedly installed with Then, as shown in FIG. 4B, the expansion joint lower square box 24 is located below the joint of the first and second steel members 11 and 12 and welded or bolted to the transverse displacement control panels 22 and 22 do. Then, the joint of the second steel member 12 is slidably inserted between the protruding sections of the transverse displacement control panels 22 and 22, and at the same time supported by the expansion joint lower box 24, the expansion joint The upper rectangular box 26 is located above the joint of the first and second steel members 11 and 12 and is welded or bolted to the transverse displacement control panels 22 and 22. Of course, the expansion joint upper square box 26 may be combined with the expansion joint lower square box 24 through bolt coupling through the transverse displacement control panel 22 inserted therethrough.

In the steel expansion joint 20 installed as described above, the joint of the first and second steel members 11 and 12 has a closed cross-sectional structure by the expansion joint lower square box 24 and the expansion joint upper square box 26 By having it, it is possible to obtain an expansion joint in which cross-sectional rigidity is increased.

In addition, when the shape steel members 11 and 12 cause displacement according to temperature change at the joint of the first and second steel members 11 and 12, the expansion joint lower square box 24 and the expansion joint upper square box 24 In a state supported by the box 26, it freely slides between the transverse displacement control plates 22 and 22 in the longitudinal direction (in the axial direction) to accommodate the displacement.

For this reason, as an example of applying the steel expansion joint 20, by allowing the displacement of the temperature load in the rigid structure between the upper girder and the lower column, the load transmitted by the temperature load is reduced and the span configuration of the steel structure is serialized so that there is no limit. can

<Second Embodiment>

A second embodiment according to the present invention provides a steel expansion joint (20a) installed in the joint connecting the first and second steel pipe members (11a, 12a) having a circular cross section as shown in FIGS. 5 to 7.

The steel expansion joint (20a) is configured with plate-shaped joint joint blades (112, 112) on both sides of the joint side of the first steel pipe member (11a). The joint joint blades 112 and 112 are installed parallel to the central axis of the steel pipe member in a long plate shape.

One end is located at the bottom of the joint of the first steel pipe member 11a and is welded or bolted to the joint joint wing 112 to form an expansion joint upper semicircular box 26a and a closed cross section of the expansion joint lower semicircular box (24a) is installed.

In a state where the joint of the second steel pipe member 12a is supported by the other end of the lower semicircular box 24a of the expansion joint, it is located on the upper part of the joint of the first and second steel pipe members 11 and 12, and the joint wing A lower half-circle box 24a of the shaft joint and an upper half-circle box 26a of the expansion joint that form a closed cross section are installed by welding or bolting to (112, 112).

Here, on both sides of the expansion joint lower semicircular box 24a, wings 242a for joining the lower semicircular box to be joined with the joint joint wing 112 are formed, and the expansion joint upper semicircular box 26a has a joint Wings 262a for joining the upper square box to be joined with the joining wing 112 are formed.

In addition, the expansion joint lower semicircular box 24a and the expansion joint upper semicircular box 26a have the first and second steel pipe members 11a and 12a over the section overlapping the joint of the second steel pipe member 12. Semicircular sliding plates 25a are attached to each of them so that the sliding movement according to the temperature change is smooth. The semicircular sliding plate 25a may be made of hard synthetic resin (for example, PTFE) or rubber.

The steel expansion joint 20a configured as described above is formed by placing the expansion joint lower semicircular box 24a below the joint of the first steel pipe member 11a as shown in FIGS. After welding or bolting, the joint of the second steel pipe member 12a is supported on the other end of the lower half-circle box 24a of the expansion joint, and the upper part of the joint of the first and second steel pipe members 11 and 12 The assembly is made simple by placing the upper half-circle box 26a of the expansion joint in the joint and joining it to the joint joint wings 112 and 112 by welding or bolting.

Therefore, the joints of the first and second steel pipe members 11a and 12a have a closed cross-sectional structure by the expansion joint lower semicircular box 24a and the expansion joint upper semicircular box 26a, thereby increasing cross-sectional rigidity. can be obtained.

In addition, when displacement occurs due to temperature change at the joint of the first and second steel pipe members 11a and 12a, the state supported by the expansion joint lower semicircular box 24a and the expansion joint upper semicircular box 26a In the first and second steel pipe members (11a, 12a) can slide freely in their longitudinal direction (throttle direction) to accommodate the displacement, thereby preventing stress generation.

As such, the steel expansion joint (20 or 20a) of the present invention allows displacement due to temperature change to greatly reduce the temperature load generated in the steel structure, thereby enabling a continuous span configuration in the upper structure of the steel structure, and thus the lower structure By reducing the number of installation locations, the construction period can be shortened and economic savings can be achieved.

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

20,20a: steel expansion joint
11, 12: first and second section steel members
22: transverse displacement control panel
23: side sliding plate
24: expansion joint lower square box
24a: Expansion joint lower half circle box
25: lower sliding plate
25a: semicircular sliding plate
26: Expansion joint upper square box
26a: Expansion joint upper half circle box
27: upper sliding plate

Claims (7)

In the steel expansion joint 20 installed at the joint connecting the first and second steel members 11 and 12 having an H-shaped or I-shaped cross section,
Transverse displacement control panels 22 and 22 having one end sections facing each other on both sides of the joint of the first section steel member 11 and fixed by welding or bolts;
Located at the bottom of the joint of the first and second steel members 11 and 12, it is welded or bolted to the transverse displacement control panels 22 and 22 to form a closed cross section with the upper square box 26 of the expansion joint. Joint lower square box 24 and;
After the joint of the second section steel member 12 is slidably inserted between the protruding sections of the transverse displacement control panels 22 and 22 and supported by the lower square box 24 of the expansion joint joint, the first and second section steel members Temperature displacement of the steel structure, characterized in that it includes; an expansion joint upper square box 26 located at the top of the joint of (11, 12) and welded or bolted to the transverse displacement control panel (22, 22) Steel expansion joint for accommodating. According to claim 1,
In the transverse displacement control panels 22 and 22, the sliding movement according to the temperature change of the first and second shaped steel members 11 and 12 over the section overlapping the joint of the second shaped steel member 12 on the inner surface facing each other A steel expansion joint for accommodating the temperature displacement of a steel structure, characterized in that the side sliding plates 23 are further attached to each other so as to be smooth. According to claim 1,
The inner surfaces of the lower square box 24 of the expansion joint and the upper square box 26 of the expansion joint in contact with the joint of the second steel member 12 are affected by the temperature change of the first and second steel members 11 and 12. A steel expansion joint for accommodating the temperature displacement of a steel structure, characterized in that the lower sliding plate 25 and the upper sliding plate 27 are further attached to each other so that the sliding movement is smooth. According to claim 1,
The expansion joint lower square box 24 has wings 242 for bonding the lower square box formed on both sides, and the expansion joint upper square box 26 has wings 262 for bonding the upper square box. Steel expansion joint for accommodating the temperature displacement of the steel structure to be. In the steel expansion joint 20a installed at the joint connecting the first and second steel pipe members 11a and 12a having a circular cross section,
Plate-shaped joint joint wings 112 and 112 are formed on both sides of the joint side of the first steel pipe member 11a;
One end is located at the bottom of the joint of the first steel pipe member 11a and is welded or bolted to the joint joint wing 112 to form an expansion joint upper semicircular box 26a and a closed cross section of the expansion joint lower semicircular box (24a) and;
In a state where the joint of the second steel pipe member 12a is supported by the other end of the lower semicircular box 24a of the expansion joint, it is located on the upper part of the joint of the first and second steel pipe members 11 and 12, and the joint wing Steel material for accommodating the temperature displacement of the steel structure, characterized in that it includes; joined to (112, 112) by welding or bolts to form a closed cross section with the lower half-circle box 24a of the shaft joint joint and the upper half-circle box 26a of the expansion joint joint. Expansion joint. According to claim 5,
On both sides of the expansion joint lower semicircular box 24a, wings 242a for joining the lower semicircular box to be joined with the joint joint wing 112 are formed, and the expansion joint upper half circle box 26a has a joint joint wing A steel expansion joint for accommodating the temperature displacement of the steel structure, characterized in that the wing (262a) for joining the upper square box to be joined with (112) is formed. According to claim 5,
In the expansion joint lower semicircular box 24a and the expansion joint upper semicircular box 26a, the temperature change of the first and second steel pipe members 11a and 12a over the overlapping section with the joint of the second steel pipe member 12 Steel expansion joint for accommodating the temperature displacement of the steel structure, characterized in that the semicircular sliding plate (25a) is attached to each so that the sliding movement according to is smooth.

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