KR102132338B1 - Steel Composite PSC Girder Including Arched Reinforcement - Google Patents

Abstract

The present invention relates to a steel composite PSC girder including an arch-shaped reinforcing material and, more specifically, to a steel composite PSC girder including an arch-shaped reinforcing material, which includes an upwardly convex arch-shaped reinforcing material in a girder body, thereby reducing deflection and stress and reducing vibration when a load is applied by using an efficient cross section strength increase.

Description

Steel Composite PSC Girder Including Arched Reinforcement

The present invention relates to a steel composite PSC girder comprising an arcuate stiffener, and more specifically, by using an efficient cross-section stiffness increase including an arcuate stiffener convex upward inside the girder body to reduce sagging and stress during load action and reduce vibration. It relates to a steel composite PSC girder comprising an arched reinforcement having a.

Bridge structures that cross rivers or roads have been developed in a wide variety of shapes and materials. In particular, the main structure mainly consists of installing the girders in the lower structure and pouring the floor plate concrete on the girders in the field. At this time, the type is classified according to the shape and material of the girder, and the type is determined by the length and construction cost of the bridge structure that meets the terrain conditions. Therefore, the girder performance synthesized with the cast-in-place floor plate concrete becomes a very important structural matter.

In general, girder-applied bridges are designed with steel girders to lower the height of the structure, or PSC girders with relatively simple material composition to meet economic feasibility. In the case of some prior arts, the methods of synthesizing steel and concrete are presented to show the technology of pre-stressed concrete (PSC) girder.

In the case of a steel material disposed inside the concrete, it is conventionally disposed in an I-shape, or placed on the top of a girder, or it is arranged in a complex form, and prestress is introduced as preflexion, posttension and pretension.

In the case of such a PSC girder, a steel wire or the like disposed therein is tensioned to distribute the load concentrated in the center of the girder to the steel wire. However, when the tension is excessively loaded, since the tensile stress on the upper surface of the girder and the compressive stress on the lower surface exceed the allowable values, the tension must be limited, so there is a problem that the stress must be concentrated in the center of the girder's throttle direction.

Accordingly, Patent Document 1 proposes a girder that can withstand high loads while minimizing the size of the cross section by differently forming the cross section of the girder according to its location, but the shape of the cross section is complicated and the manufacturing process is cumbersome. There was a problem in that shear fracture occurs due to a rapid cross-sectional change.

KR 10-1345197 B1

An object of the present invention is to provide a steel composite PSC girder comprising an arched stiffener having an effect of reducing sagging and stress and reducing vibration when a load is applied by using an efficient cross-section stiffness enhancement including an arched stiffener convex upward in the girder body. Is done.

In order to solve the above problems, the present invention is a rigid synthetic PSC girder comprising an arcuate reinforcement, a girder body having a long shape in the throttle direction; Sole plate that can be disposed on both ends of the girder body; It is formed of a plate-like member of a vertically arranged steel material, both ends are supported by the sole plate, and a portion between both ends can be disposed inside the girder body in an arch shape convex upward; A horizontal steel plate which is disposed to be joined to a part of the upper portion of the arch-shaped reinforcement, and partially exposed to the outside through the upper surface of the girder body, and having a plate shape extending in length in the throttle direction; And a jack-up reinforcement plate to which a portion of each of the sole plate and the arch-shaped reinforcing member is bonded and to disperse the load applied to the sole plate. Including, the sole plate, the arch-shaped reinforcement, the jack-up reinforcement plate is disposed inside the girder body, and a portion of the arc-shaped reinforcement joined to the horizontal steel plate is formed in a straight line, provides a rigid synthetic PSC girder .

In the present invention, both end portions of the girder body are formed with an end extension block protruding in a direction perpendicular to the throttle, the sole plate is arranged to extend to the end extension block, and the jack-up reinforcement plate extends to the end extension block It can be disposed perpendicular to the sole plate and disposed inside the end enlargement block.

In the present invention, the rigid PSC girder is disposed on the side surface of the end-expansion block, is provided with a cross-beam connecting reinforcing bar capable of coupling the end cross-beam, the normal direction of the side surface may be a perpendicular axis direction.

In the present invention, the jack-up reinforcement plate may be formed with a steel wire through hole through which the steel wire of the PSC girder can be disposed.

In the present invention, the rigid composite PSC girder further comprises a central crossbeam bracket that can be coupled to a central crossbeam disposed between and fixed between the girder and the girder, and the end cross-section of one end of the central crossbeam bracket is an axis of the arched reinforcement. It may be coupled to the side surface in the right angle direction in the form of a line junction.

In the present invention, the central cross-beam bracket, the central cross-beam coupling unit coupled to the central cross-beam; And an arch-shaped stiffener coupling portion vertically disposed and coupled to the arch-shaped stiffener and the horizontal steel plate. It may include.

In the present invention, the rigid composite PSC girder may further include an arch-shaped reinforcement reinforcement that is attached to both sides of the arch-shaped reinforcement at a right angle to the shaft, thereby increasing the rigidity of the arch-shaped reinforcement.

In the present invention, both sides of the arch-shaped reinforcing member at right angles to the throttle, the upper surface of the sole plate, and both sides of the jack-up reinforcing plate in the throttling direction may be provided with a plurality of shear connectors for coupling with the girder body.

In the present invention, on the upper surface of the horizontal steel plate, a plurality of shear connecting members for coupling with the bottom plate slab may be provided.

In the present invention, the steel composite PSC girder is coupled to the lower surface of the sole plate, is formed of a plurality of steel plate-like members, the lower surface of the bridge can be coupled to the bridge structure; Further comprising, the arch-shaped reinforcement further extends by the height of the support connecting portion from the both ends of the girder body to the lower side of the sole plate, the support connecting portion, the portion of the arch-shaped reinforcement to be joined in a pre-joined form Can.

According to an embodiment of the present invention can reduce the sagging and stress by the arch-shaped reinforcement disposed in the girder can exhibit the effect of increasing the resistance to buckling.

According to an embodiment of the present invention, it is possible to exert a vibration reducing effect on the live load by the arch-shaped reinforcement.

According to an embodiment of the present invention, when introducing the tension force by the strand, it is possible to exert the effect of reducing the mold height by increasing the stiffness and eccentricity effect by the horizontal steel sheet.

According to an embodiment of the present invention, when the bridge support is replaced, including the end expansion block, the hydraulic jack can be easily mounted to exert the effect of raising and lowering the superstructure.

According to an embodiment of the present invention, it is possible to exert the effect of providing a connecting member capable of easily coupling the central cross-beam by coupling the central cross-beam bracket to the arch-shaped reinforcement material.

According to an embodiment of the present invention, the sole plate, the arch-shaped stiffener, and the jack-up reinforcement plate are vertically coupled to each other at the end of the girder, thereby exerting an effect of exhibiting high strength.

According to an embodiment of the present invention, by providing a connection with the bridge under the bridge structure, it is possible to secure the integrity and exert the effect of constructing a ramen bridge type bridge.

According to an embodiment of the present invention, by attaching a shear connecting material to the steel material can exert the effect that the steel material can secure the integrity with the girder body and the upper slab.

1 is a view schematically showing the structure of a bridge using a steel composite PSC girder according to an embodiment of the present invention.
2 is a view schematically showing a state of a steel composite PSC girder according to an embodiment of the present invention.
3 is a view schematically showing the internal structure of a steel composite PSC girder according to an embodiment of the present invention.
4 is a view schematically showing a steel structure of a steel composite PSC girder according to an embodiment of the present invention.
5 is a view schematically showing the structure of a steel composite PSC girder according to an embodiment of the present invention.
FIG. 6 is a view schematically showing that the steel composite PSC girder according to an embodiment is lifted by a hydraulic jack in an end enlargement block during a common period.
7 is a view schematically showing an end structure of a steel composite PSC girder according to an embodiment of the present invention.
8 is a view schematically showing a structure of a central portion of a steel composite PSC girder according to an embodiment of the present invention.
9 is a view schematically showing a structure in which an arch-shaped reinforcement reinforcement is applied to an arch-shaped reinforcement according to an embodiment of the present invention.
10 is a view schematically showing the structure of a central cross-beam bracket according to an embodiment of the present invention.
11 is a view schematically showing a steel structure of a steel composite PSC girder equipped with a support connection according to an embodiment of the present invention.
12 is a view schematically showing a construction process of a steel composite PSC ramen bridge equipped with a support connection according to an embodiment of the present invention.
13 is a view schematically showing the appearance of various types of arch-shaped reinforcement according to an embodiment of the present invention.

In the following, various embodiments and/or aspects are now disclosed with reference to the drawings. In the following description, for purposes of explanation, a number of specific details are disclosed to aid the overall understanding of one or more aspects. However, it will also be appreciated by those skilled in the art that this aspect(s) can be practiced without these specific details. The following description and the annexed drawings set forth in detail certain illustrative aspects of the one or more aspects. However, these aspects are exemplary and some of the various methods in the principles of the various aspects may be used, and the descriptions described are intended to include all such aspects and their equivalents.

As used herein, "an embodiment", "yes", "a good", "an example", etc., may not be construed as any aspect or design described being better or more advantageous than another aspect or designs. .

In addition, the term “or” is intended to mean an inclusive “or” rather than an exclusive “or”. That is, unless specified otherwise or unclear in context, "X uses A or B" is intended to mean one of the natural inclusive substitutions. That is, X uses A; X uses B; Or, if X uses both A and B, "X uses A or B" can be applied in either of these cases. It should also be understood that the term "and/or" as used herein refers to and includes all possible combinations of one or more of the listed related items.

Also, the terms “comprises” and/or “comprising” mean that the feature and/or component is present, but excludes the presence or addition of one or more other features, elements, and/or groups thereof. It should be understood as not.

Further, terms including ordinal numbers such as first and second may be used to describe various components, but the components are not limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term and/or includes a combination of a plurality of related described items or any one of a plurality of related described items.

In addition, in the embodiments of the present invention, unless otherwise defined, all terms used herein, including technical or scientific terms, are generally understood by those skilled in the art to which the present invention pertains. It has the same meaning as that. Terms, such as those defined in a commonly used dictionary, should be interpreted as having meanings consistent with meanings in the context of related technologies, and are ideally or excessively formal meanings unless explicitly defined in the embodiments of the present invention. Is not interpreted as

1 is a view schematically showing the structure of a bridge using a steel composite PSC girder according to an embodiment of the present invention.

Referring to FIG. 1, it is possible to confirm a state of a bridge constructed using a steel composite PSC girder 10 according to an embodiment of the present invention.

A plurality of the rigid composite PSC girders 10 are arranged side by side on the substructure 50 of the bridge such as a pier, and the plurality of rigid composite PSC girders 10 are provided at the end crossover 20 and the central crossover 30. It is fastened and fixed to each other. In addition, a slab 40 is disposed on the upper portion of the steel composite PSC girder 10 to serve as a bridge.

2 is a view schematically showing the appearance of a steel composite PSC girder according to an embodiment of the present invention, Figure 3 is a view schematically showing the internal structure of a steel composite PSC girder according to an embodiment of the present invention .

Referring to Figure 2, the rigid composite PSC girder 10 according to an embodiment of the present invention is placed in the girder body 210 having an elongated shape in the throttle direction and the girder body 210 to be tensioned by being placed therein. It may include a steel wire 310 to apply a compressive force to the (210). The steel wire 310 may be fixed by a fixing device 320 provided at both ends of the girder body 210. According to an embodiment of the present invention by such a structure, a girder with increased response to external force can be configured by applying stress through the strand 310 to the girder body 210 made of concrete.

At this time, in one embodiment of the present invention, both ends of the girder body 210 of the rigid composite PSC girder 10 may have end expansion blocks 220 protruding in the direction perpendicular to the throttle. The end enlargement block 220 is formed integrally with the girder body 210 to provide a space for installation of a hydraulic jack when the superstructure is raised for a bridge support replacement or the like during the use period after completion of the bridge.

In one embodiment of the present invention, the rigid composite PSC girder 10 is disposed on the side surface of the end enlargement block 220, and is provided with a cross beam connecting reinforcing bar 225 capable of coupling the end crossbeam 20. It can be. At this time, the normal direction of the side surface is perpendicular to the throttle. By constructing the reinforced concrete end cross-beam 20 using the cross beam connecting rebar 225, a bridge can be constructed by installing the end cross-beam 20 integrated with the steel composite PSC girder 10.

In addition, in one embodiment of the present invention, the rigid synthetic PSC girder 10 may further include a central crossbeam bracket 150 that can be coupled to a central crossbeam 30 disposed and fixed between the girder and the girder. .

At this time, as shown in FIGS. 2 and 3, the rigid PSC girder 10 according to an embodiment of the present invention includes a sole plate 130 disposed at both ends of the ends of the girder body 210; It is formed of a steel plate disposed vertically, both ends are supported by the sole plate 130, and a portion between both ends is an arch-shaped reinforcement 110 disposed inside the girder body 210 in a convex upward arc shape; A horizontal steel plate 120 which is disposed to be joined to a part of the upper end of the arch-shaped stiffener 110, and partially exposed to the outside through the upper surface of the girder body 210; And a jack-up reinforcement plate 140 which is vertically disposed on each of the sole plate 130 and the arch-shaped reinforcement member 110 to be joined to disperse the load applied to the sole plate 130; It may include.

At this time, a portion of the arch-shaped stiffener 110 that is joined to the horizontal steel plate 120 may have a height equal to an upper surface of the girder body 210 and may be formed in a straight line.

The arch-shaped stiffener 110 has an arcuate shape with a central portion convex upward and is disposed inside the girder body 210. Such an arch shape can reduce stress by efficiently distributing the load applied to the girder 10.

As described above, in one embodiment of the present invention, the sag and stress are reduced by the arch-shaped stiffener 110 disposed in the girder 10, thereby exerting the effect of increasing resistance to buckling and exerting a vibration reduction effect on live loads. have.

The horizontal steel plate 120 is arranged and coupled to the top of the central portion of the arch-shaped reinforcement 110. The horizontal steel plate 120 distributes the load applied to the arch-shaped stiffener 110, and the bottom plate slab 40 formed on the upper side of the steel composite PSC girder 10 and the steel composite PSC girder 10 It will serve to join the.

Preferably, the horizontal steel plate 120 has a plate shape that extends in the direction of the throttle, and is joined to a part of the upper end of the arch-shaped reinforcing member 110 to prevent the arch-shaped reinforcing member from transversely buckling in the direction perpendicular to the throttle. You can do

The sole plate 130 is disposed at both ends of the end of the girder body 210 and coupled with the arch-shaped reinforcement 110. The sole plate 130 serves to distribute and transmit the load when the steel composite PSC girder 10 is coupled to the substructure 50 of the bridge.

Since such a sole plate 130 receives a concentrated load from a junction with the arcuate stiffener 110, it is vertically bonded to the solplate 130 and the arcuate stiffener 110 to jack-up reinforcement plate to distribute the load ( 140).

At this time, in one embodiment of the present invention, the sole plate 130 may be disposed to extend to the end expansion block 220, and the jack-up reinforcement plate 140 may extend to the end expansion block 220. The sole plate 130 may be vertically disposed and may be disposed inside the end expansion block 220. As described above, the sole plate 130 and the jack-up reinforcement plate 140 are integrally formed up to the inside of the end enlargement block 220 so that the end enlargement block 220 can disperse the load.

4 is a view schematically showing a steel structure of a steel composite PSC girder according to an embodiment of the present invention.

Referring to Figure 4, the arch-shaped reinforcement 110 is vertically coupled to the sole plate 130, the jack-up reinforcement plate 140 perpendicular to the sole plate 130 and the arch-shaped reinforcement 110 It can be confirmed that is combined.

In this way, the sole plate 130, the arch-shaped reinforcement 110, and the jack-up reinforcement plate 140 are vertically coupled to each other at the ends of the girder 10, thereby exerting an effect of exhibiting high strength.

In addition, a horizontal steel plate 120 is coupled to the upper side of the center of the arch-shaped reinforcement 110. At this time, in one embodiment of the present invention, all of the steel materials such as the arc-shaped stiffener 110, the horizontal steel plate 120, the sole plate 130, and the jack-up reinforcement plate 140 as shown in FIG. 4 are welded and integrated. It can be, it is possible to secure the structural stability by such a configuration.

5 is a view schematically showing the structure of a steel composite PSC girder according to an embodiment of the present invention.

FIG. 5(a) is a side view of the internal structure of the rigid composite PSC girder 10 according to an embodiment of the present invention, viewed from a right angle to the throttle, and FIG. 5(b) is a plan view seen from above.

Referring to Figure 5 (a), the arch-shaped reinforcement 110 according to an embodiment of the present invention has a central upper end is formed in a straight line, the horizontal steel plate 120 is coupled.

As shown in Fig. 5 (a), the arch-shaped stiffener 110 has an arcuate shape with a central portion convex upward. In order to distribute a high load through the arch shape, the curvature of the arch shape must be high. However, when the curvature of the arch shape is increased, the height of the arch-shaped reinforcement 110 is also increased, so that the height of the girder body 210 is also increased.

Therefore, in the present invention, the upper portion of the center of the arcuate stiffener 110 is formed in a straight line in order to lower the height while the arcuate stiffener 110 has a high curvature. However, when the upper end of the central portion is formed in a straight line, there is a problem in that the width of the arch is reduced in the central portion. In the present invention, the horizontal steel plate 120 is coupled to the upper portion of the central portion of the arch-shaped stiffener 110 to reinforce it. do. As described above, when the upper end of the arch-shaped reinforcement 110 is formed in a straight line and the horizontal steel plate 120 is combined, high structural stability can be secured while reducing the amount of steel used, and a vibration reduction effect can be exhibited.

As described above, in an embodiment of the present invention, when the tension force by the strand 310 is introduced, the stiffness and eccentricity can be increased by the horizontal steel plate 120 to exert an effect of reducing the mold height.

On the other hand, as shown in (a) and (b) of Figure 5 in one embodiment of the present invention, both sides of the arch-shaped reinforcement 110 in the direction perpendicular to the throttle, the upper surface of the sole plate 130 and the jack-up reinforcement plate On both sides of the throttling direction of 140, a plurality of shear connectors 115 for coupling with the girder body 210 are provided at predetermined intervals, and on the upper surface of the horizontal steel plate 120, a bottom plate slab ( 40) may be provided with a plurality of shear connecting members 125 for a predetermined interval.

As described above, in one embodiment of the present invention, a shear connecting material is attached to the steel material, so that the steel material can exhibit an effect of securing integrity with the girder body 210 and the upper bottom plate slab 40.

FIG. 6 is a view schematically showing that the steel composite PSC girder according to an embodiment is lifted by a hydraulic jack in an end enlargement block during a common period.

As shown in FIG. 6, the bridge support 60 is positioned at the lower end of the rigid composite PSC girder 10 to be coupled with the bridge structure 50. The bridge support 60 is located between the upper structure and the lower structure of the bridge to resist the upper self-weight and serves to accommodate the horizontal force and the amount of movement during normal or earthquake.

In order to repair or replace the bridge support 60, it is necessary to lift the upper structure including the steel composite PSC girder 10 using a hydraulic jack 70 or the like. At this time, the rigid composite PSC girder 10 according to an embodiment of the present invention can secure a space in which the hydraulic jack 70 can be installed, including the end expansion block 220 as described above.

As shown in FIG. 6, in the bridge using the steel composite PSC girder 10 according to an embodiment of the present invention, the hydraulic jack 70 may be installed at a lower end of the end expansion block 220. The sole plate 120 is provided at the lower end of the end expansion block 220, and the jack-up reinforcement plate 140 is provided inside the end expansion block 220 to be applied to the steel composite PSC girder 10. The load can be effectively distributed.

Therefore, the steel composite PSC girder 10 according to an embodiment of the present invention can exhibit the effect of raising and lowering the superstructure by easily mounting the hydraulic jack 70 when replacing the bridge bearing.

Alternatively, in one embodiment of the present invention, one bridge bearing 60 as shown in FIG. 6 is not disposed at the lower end of the rigid composite PSC girder 10, and a plurality of bridge bearings 60 may be provided. have. The rigid composite PSC girder 10 according to an embodiment of the present invention can secure a space in which a plurality of bridge supports 60 can be disposed by providing the end enlargement block 220, thereby allowing the girder. (10) can exhibit an effect of preventing falling or tipping during construction or after construction.

Alternatively, the hydraulic jack 70 may be fixedly installed as shown in FIG. 6 during construction to exert a fall prevention effect through the hydraulic jack 70 and perform maintenance for tilting and the like.

7 is a view schematically showing an end structure of a steel composite PSC girder according to an embodiment of the present invention.

Fig. 7(a) is a front view of the end of the rigid PSC girder viewed from the throttle direction, and Fig. 7(b) is a plan view of the end of the rigid PSC girder seen from above.

Referring to (a) of FIG. 7, an end enlargement block 220 is provided at an end of the girder body 210 as described above, and an end of the girder body 210 and an end enlargement block 220 of the girder body 210 are provided. At the bottom, the sole plate 130 is located to distribute the load applied in connection with the bridge support 60 or the hydraulic jack 70, and by the jack-up reinforcement plate 140 disposed vertically with the sole plate 130. The load is distributed more effectively.

On the other hand, in one embodiment of the present invention, the jack-up reinforcement plate 140 may be formed with a steel wire through hole 145 through which the steel wire 310 of the PSC girder 10 can be disposed. Since the jack-up reinforcement plate 140 is disposed in a direction perpendicular to the sole plate 130 and the arch-shaped reinforcement 110 as shown in FIG. 7, the stranded wire during compression in the axial direction of the girder body 210 ( It is necessary to have a through hole for installing 310).

8 is a view schematically showing a central structure of a steel composite PSC girder according to an embodiment of the present invention, and FIG. 9 schematically shows a structure in which an arch-type reinforcement reinforcement is applied to an arch-shaped reinforcement according to an embodiment of the present invention It is a drawing.

The arch-shaped reinforcement 110 according to an embodiment of the present invention is located inside the girder body 210 and serves to distribute the load. In order to assist the distribution of the load, in one embodiment of the present invention, the rigid PSC girder 10 is attached to both sides of the arch-shaped stiffener 110 in the direction perpendicular to the axis of the stiffener 110, thereby increasing the stiffness of the arch-shaped stiffener 110. It may further include an arch-shaped reinforcement reinforcement 160 to increase.

8 (a), (b), and (c) show the cross-section of the central portion of the rigid composite PSC girder 10 according to different embodiments. At this time, the cross section of FIG. 8 may be an A-A' cross section shown in FIG. 5(a).

Figure 8 (a) shows a cross-section of the embodiment does not include the arch-shaped reinforcement 160. In this cross-section, the arch-shaped reinforcement 110 is provided with a shear connecting member 115 for easy coupling with the girder body 210, and a horizontal steel plate 120 is coupled to the top of the arch-shaped reinforcement 110. have. The horizontal steel plate 120 is provided with a shear connector 125 for easy coupling with the bottom plate slab 40.

Figure 8 (b) shows a cross-section of an embodiment in which the arch-shaped reinforcement (160a) is included. In the embodiment shown in Figure 8 (b), the arch-shaped reinforcement reinforcement (160a) may be coupled to the arch-shaped reinforcement reinforcement (160a) of the thickness-enhancing type on both sides perpendicular to the axis of the arch-shaped reinforcement (110). In this embodiment, the arched stiffeners 160a, such as the arched stiffener 110, are coupled to both sides of the arched stiffener 110 to increase the stiffness of the arched stiffener 110. Preferably, the arch-shaped reinforcement reinforcement 160a may be welded to and coupled to the arch-shaped reinforcement 110.

Figure 8 (c) shows a cross-section of an embodiment in which the arch-shaped reinforcement (160b) is included. In the embodiment shown in Figure 8 (c), the arch-shaped reinforcement reinforcement (160b) may be coupled to the horizontal reinforcement rib-shaped arch-type reinforcement reinforcement (160b) on both sides of the arch-shaped reinforcement (110) perpendicular to the axis. . In this embodiment, a curved rib-shaped arch-shaped reinforcement 160b along the arch shape of the arch-shaped reinforcement 110 is coupled to both sides of the arch-shaped reinforcement 110 to increase the rigidity of the arch-shaped reinforcement 110 I can do it. Preferably, the arcuate reinforcement reinforcement 160b may be welded to and coupled to the arcuate reinforcement 110.

8(a), (b), and (c) are perspective views of the steel structures in the embodiments shown in FIGS. 9(a), (b) and (c), respectively.

FIG. 9(a) shows an exemplary embodiment in which the arch-type reinforcement member 160 as described above is not included, and FIG. 9(b) includes a thickness-enhancing arch-type reinforcement member 160a. The shape of an example is shown, and FIG. 9(c) shows the shape of an embodiment in which a horizontal reinforcement rib-shaped arch-shaped reinforcement 160b is included.

10 is a view schematically showing the structure of a central cross-beam bracket according to an embodiment of the present invention.

10 (a) is a front view of the central cross-beam bracket 150 coupled to the steel composite PSC girder 10 seen from the throttle direction, and FIG. 10 (b) is a plan view from above 10(c) is a perspective view.

As described above, the rigid synthetic PSC girder 10 according to an embodiment of the present invention may include a central crossbeam bracket 150 that can be coupled to a central crossbeam 30 disposed and fixed between the girder and the girder. have.

At this time, a cross-section of one end side of the central cross-beam bracket 150 may be coupled in the form of a line junction to a side surface in the direction perpendicular to the axis of the arch-shaped reinforcement 110.

Looking in more detail with reference to Figure 10, the central cross-beam bracket 150, the central cross-beam coupling unit 151 coupled to the central cross-beam 30; And an arch-shaped stiffener coupling portion 153 which is vertically disposed and coupled with the arch-shaped stiffener 110 and the horizontal steel plate 120. It may include. Preferably, the central cross-beam bracket 150 includes a bracket connection portion 152 for coupling the central cross-beam coupling portion 151 and the arch-shaped reinforcement coupling portion 153; It may further include.

Referring to (a) and (b) of FIG. 10, the arch-shaped reinforcing member coupling portion 153 is formed of a steel plate and vertically arranged and coupled with the arch-shaped reinforcing material 110 and the horizontal steel plate 120. Preferably, the arcuate stiffener coupling portion 153 may be welded and coupled to the arcuate stiffener 110 and the horizontal steel plate 120. By being vertically arranged and coupled in this way, the central cross-beam bracket 150 can be stably fixed to the arch-shaped reinforcement 110, and thus has the advantage of easy construction of the rigid synthetic PSC girder 10.

On the other hand, the central cross-beam coupling portion 151 may be coupled to the central cross-beam 30 disposed between the girder and the girder is disposed protruding from the girder body 210 in the direction perpendicular to the axis. The central cross-beam 30 may be made of steel, and the central cross-beam coupling portion 151 may be easily coupled with the central cross-beam 30 by having a coupling hole.

2 and 3 illustrate an embodiment in which a pair of central cross-beam coupling portions 151 are provided on both sides of a vertical axis of the girder in the central direction of the girder body 210, but the present invention is not limited thereto. The central interlocking coupling portion 151 may be provided, or a plurality of central interlocking coupling portion 151 may be provided.

As described above, in one embodiment of the present invention, by combining the central cross-beam bracket 150 to the arch-shaped reinforcement 110, it is possible to exert the effect of easily providing a connecting member capable of coupling the center cross-beam 30.

11 is a view schematically showing a steel structure of a steel composite PSC girder equipped with a support connection according to an embodiment of the present invention.

In another embodiment of the present invention, the steel composite PSC girder 10 is coupled to the lower surface of the sole plate 130 and is formed of a plurality of plate-like members made of steel, so that the lower surface can be coupled to the bridge substructure. Connection unit 170; It may further include. The rigid composite PSC girder 10 is integrally coupled to the bridge structure 50 by the support connecting portion 170, and thus may be constructed in the form of a Ramen bridge.

Referring to Figure 11, the arch-shaped stiffener 110 is further extended by the height of the support connecting portion 170 below the sole plate 130 from both ends of the girder body, the support connecting portion 170 is extended A portion of the arch-shaped stiffener 110 may be combined in a line junction form.

More specifically, the support connecting portion 170 is a connection load plate 171 which is disposed spaced a predetermined distance from the sole plate 130; And a connecting portion vertical plate 172 interposed between the connecting load plate 171 and the sole plate 130 to be coupled. It may include. At this time, the arch-shaped reinforcement 110 may be extended to the lower side of the sole plate 130 by the length of the connecting portion vertical plate 172. That is, the connecting load plate 171, the connecting portion vertical plate 172 and the arch-shaped reinforcement 110 is vertically coupled, the sole plate 130 is the arch-shaped reinforcement 110 and the connecting portion vertical plate 172 And vertically combined.

In this way, the support connecting portion 170 is integrally coupled to the extension portion of the arch-shaped stiffener 110 so that it can easily form a ramen bridge, and secure structural stability.

At this time, in one embodiment of the present invention, the connecting load plate 171 may be provided with an anchor bolt hole 173 through which a fixing anchor bolt can pass.

12 is a view schematically showing a construction process of a steel composite PSC ramen bridge equipped with a support connection according to an embodiment of the present invention.

Referring to (a) of FIG. 12, first, the steel composite PSC girder 10 is disposed on the substructure 50 of the bridge, and the anchor bolt penetrates the anchor bolt hole 173 of the support connecting portion 170. It is fixed to the substructure 50 by 81. In addition, the wall reinforcement 82 may be installed on the end side of the steel composite PSC girder (10).

Referring to (b) of FIG. 12, thereafter, concrete (90) is poured into a space including an end portion of the support connection portion (170), the wall reinforcement (82), and the rigid PSC girder (10) to form an integral slab. Can form. When the integral slab is formed in this way, the substructure 50 of the bridge, the rigid PSC girder 10, and the slab are all integrally formed to form a ramen bridge.

In this way, the steel composite PSC girder 10 according to an embodiment of the present invention is provided with a connecting portion 170 to secure the integrity by combining with the bridge substructure 50 to form a ramen bridge type bridge. have.

13 is a view schematically showing the appearance of various types of arch-shaped reinforcement according to an embodiment of the present invention.

13 (a), (b), and (c) of FIG. 13 shows the shape of the arched reinforcement 110 according to various embodiments of the present invention.

In the embodiment shown in Figure 13 (a), the arch-shaped reinforcement 110 has a constant curvature of the merchant ship within a predetermined distance from the lower end and the end, and the upper portion of the central portion is formed in a straight line to combine the horizontal steel plate 120 .

In the embodiment shown in Fig. 13 (b), the arch-shaped reinforcement 110 has a constant curvature of the upper and lower lines within a predetermined distance from the end, and the upper and lower lines are formed in a straight line in the central portion, and the horizontal steel plate 120 is located at the upper portion of the central portion. This is combined.

In the embodiment shown in (c) of FIG. 13, the inner and outer sides of the arcuate stiffener 110 contacting the sole plate 130 disposed at both ends of the arcuate stiffener 110 are formed at different heights, and the center portion is formed at different heights. It is formed in a straight line and the horizontal steel plate 120 is coupled to the upper portion of the center.

As described above, the arch-shaped stiffener 110 according to the present invention has various shapes and is disposed in the girder body 120 to distribute the load.

According to an embodiment of the present invention can reduce the sagging and stress by the arch-shaped reinforcement disposed in the girder can exhibit the effect of increasing the resistance to buckling.

According to an embodiment of the present invention, it is possible to exert a vibration reducing effect on the live load by the arch-shaped reinforcement.

According to an embodiment of the present invention, when introducing the tension force by the strand, it is possible to exert the effect of reducing the mold height by increasing the stiffness and eccentricity effect by the horizontal steel sheet.

According to an embodiment of the present invention, when the bridge support is replaced, including the end expansion block, the hydraulic jack can be easily mounted to exert the effect of raising and lowering the superstructure.

According to an embodiment of the present invention, it is possible to exert the effect of providing a connecting member capable of easily coupling the central cross-beam by coupling the central cross-beam bracket to the arch-shaped reinforcement material.

According to an embodiment of the present invention, the sole plate, the arch-shaped stiffener, and the jack-up reinforcement plate are vertically coupled to each other at the end of the girder, thereby exerting an effect of exhibiting high strength.

According to an embodiment of the present invention, by providing a connection with the bridge under the bridge structure, it is possible to secure the integrity and exert the effect of constructing a ramen bridge type bridge.

According to an embodiment of the present invention, by attaching a shear connecting material to the steel material can exert the effect that the steel material can secure the integrity with the girder body and the upper slab.

As described above, although the embodiments have been described by a limited embodiment and drawings, those skilled in the art can make various modifications and variations from the above description. For example, the described techniques are performed in a different order than the described method, and/or the components of the described system, structure, device, circuit, etc. are combined or combined in a different form from the described method, or other components Alternatively, even if replaced or substituted by equivalents, appropriate results can be achieved. Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

10: girder 20: end crossover
30: Jungangrobo 40: Bottom slab
50: substructure 60: bridge support
70: hydraulic jack 81: anchor bolt
82: wall reinforcement 90: concrete
110: arch-shaped reinforcement 115: shear connection material
120: horizontal steel sheet 125: shear connecting material
130: Sole plate 140: Jack-up reinforcement plate
150: central crossing bracket 151: central crossing coupling
152: bracket connection portion 153: arch-shaped reinforcement coupling portion
160: arched reinforcement
170: support connecting portion 171: connecting load plate
172: vertical connection part 173: anchor bolt hole
210: girder body
220: end extension block 225: crossbeam connecting rebar
310: lecture line 320: settlement

Claims (7)

A steel composite PSC girder comprising an arched reinforcement,
A girder body having a long shape in the throttle direction;
Sole plate that can be disposed on both ends of the girder body;
It is formed of a plate-like member of a vertically arranged steel material, both ends are supported by the sole plate, and a portion between both ends can be disposed inside the girder body in an arch shape convex upward;
A horizontal steel plate which is disposed to be joined to a part of the upper portion of the arch-shaped reinforcement, and partially exposed to the outside through the upper surface of the girder body, and having a plate shape extending in length in the throttle direction; And
A jack-up reinforcement plate to which a portion of each of the sole plate and the arch-shaped reinforcement is bonded and to distribute the load applied to the sole plate; Including,
The sole plate, the arch-shaped reinforcement, and the jack-up reinforcement plate are disposed inside the girder body,
A portion of the arch-shaped reinforcement joined to the horizontal steel plate is formed in a straight line,
The strong synthetic PSC girder,
Further comprising a central cross-beam bracket that can be combined with the central cross-beam mounted and fixed between the girders and,
A rigid synthetic PSC girder having a cross-section of one end side of the central cross-beam bracket coupled to a side surface in a direction perpendicular to the axis of the arch-shaped reinforcement.
The method according to claim 1,
At both ends of the girder body, end extension blocks protruding in the direction perpendicular to the throttle are formed,
The sole plate is disposed to extend to the end expansion block,
The jack-up reinforcement plate extends to the end expansion block and is disposed perpendicular to the sole plate and disposed inside the end expansion block, a rigid synthetic PSC girder.
The method according to claim 1,
The jack-up reinforcement plate is formed with a stranded through-hole through which the strand of the PSC girder can be disposed, the composite PSC girder.
delete The method according to claim 1,
The central cross-beam bracket,
A central cross-beam coupling unit coupled to the central cross-beam; And
An arch-shaped stiffener coupling portion vertically disposed and coupled to the arch-shaped stiffener and the horizontal steel plate; Containing, a strong synthetic PSC girder.
A steel composite PSC girder comprising an arched reinforcement,
A girder body having a long shape in the throttle direction;
Sole plate that can be disposed on both ends of the girder body;
It is formed of a plate-like member of a vertically arranged steel material, both ends are supported by the sole plate, and a portion between both ends can be disposed inside the girder body in an arch shape convex upward;
A horizontal steel plate which is disposed to be joined to a part of the upper portion of the arch-shaped reinforcement, and partially exposed to the outside through the upper surface of the girder body, and having a plate shape extending in length in the throttle direction; And
A jack-up reinforcement plate to which a portion of each of the sole plate and the arch-shaped reinforcement is bonded and to distribute the load applied to the sole plate; Including,
The sole plate, the arch-shaped reinforcement, and the jack-up reinforcement plate are disposed inside the girder body,
A portion of the arch-shaped reinforcement joined to the horizontal steel plate is formed in a straight line,
The strong synthetic PSC girder,
A rigid synthetic PSC girder further comprising an arch-shaped reinforcement reinforcement that is attached to both sides of the arch-shaped reinforcement at a right angle to the axis of the axial reinforcement to increase the rigidity of the arch-shaped reinforcement.
A steel composite PSC girder comprising an arched reinforcement,
A girder body having a long shape in the throttle direction;
Sole plate that can be disposed on both ends of the girder body;
It is formed of a plate-like member of a vertically arranged steel material, both ends are supported by the sole plate, and a portion between both ends can be disposed inside the girder body in an arch shape convex upward;
A horizontal steel plate which is disposed to be joined to a part of the upper portion of the arch-shaped reinforcement, and partially exposed to the outside through the upper surface of the girder body, and having a plate shape extending in length in the throttle direction; And
A jack-up reinforcement plate to which a portion of each of the sole plate and the arch-shaped reinforcement is bonded and to distribute the load applied to the sole plate; Including,
The sole plate, the arch-shaped reinforcement, and the jack-up reinforcement plate are disposed inside the girder body,
A portion of the arch-shaped reinforcement joined to the horizontal steel plate is formed in a straight line,
The strong synthetic PSC girder,
The end of the arch-shaped reinforcement
It is coupled to the lower surface of the sole plate, is formed of a plurality of steel plate-shaped member, the lower surface of the bridge connecting portion that can be coupled to the bridge structure; Further comprising,
The arch-shaped reinforcement further extends from the both ends of the girder body to the lower side of the sole plate by the height of the support connecting portion,
The support connection portion, a rigid composite PSC girder that is coupled in a pre-joined form with a portion of the extended arch-shaped reinforcement.

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