KR101314791B1 - Composite rigid-frame bridge with variable section - Google Patents

Abstract

The present invention relates to a cross sectional composite ramen bridge including shifts located at both ends of a bridge and a girder strongly coupled to both ends of the shift, and more specifically, to a sectional rigid pipe girder for efficient use of cross-sectional rigidity. Is applied to synthetic ramen, which is a composite cross-sectioned ramen bridge with improved economics and aesthetics.
The cross-sectional composite ramen bridge of the present invention relates to a ramen bridge including an alternating position located at both ends of the bridge and a girder which is strongly coupled to the upper end of the alternating cross section, wherein the girder has a circular steel pipe in a cross-sectional shape at the girder end. The diameter of the round steel pipe becomes smaller toward the center, the shift is a lower shift consisting of concrete, a girder through which is coupled to the upper part of the lower shift to support the end of the girder, consisting of concrete and the girder above the lower shift End of the cradle and the girder is characterized in that it is composed of an upper portion formed to be embedded.
According to the present invention, there is no need to place a haunch at the end of the girder having a large moment or add a separate reinforcement girder, so that construction is easy and air shortening is possible. In addition, the stress change of the cross-sectional force against the external force is gentle, not only structurally easy, but also economical and aesthetics can be improved.

Description

Composite rigid-frame bridge with variable section}

The present invention relates to a cross sectional composite ramen bridge including shifts located at both ends of a bridge and a girder strongly coupled to both ends of the shift, and more specifically, to a sectional rigid pipe girder for efficient use of cross-sectional rigidity. Is applied to synthetic ramen, which is a composite cross-sectioned ramen bridge with improved economics and aesthetics.

Bridges can be divided into girder bridges, simple bridges, continuous bridges, truss bridges, arch bridges, and ramen bridges, depending on the type of superstructure.

Among these, the ramen bridge is rigidly formed by combining girder and alternator, which can reduce the bending moment of the girder and increase the stability of the shift. It is not only excellent in seismic structure, but also ordinary girder bridge. Due to the advantage that the mold height can be set lower than that of), it is used in various places including three-dimensional cross sections.

Since the girder of the conventional synthetic ramen bridge has a large end moment, as shown in Korean Patent No. 10-0964067 (name of the invention: a steel pipe composite girder for bridges and a method of manufacturing the same), a haunch is placed at the end of the girder, or shown in FIG. 1. As described above, the section was reinforced by adding a separate inclined girder to both ends of the bridge to increase the girder cross-sectional area.

However, the method of placing the haunch at the end of the girder is not easy to reinforce the reinforcement and formwork in the haunch, there is a problem that the cross-sectional stress is likely to change rapidly with the haunch boundary.

In addition, the method of adding a separate inclined girder at both ends of the bridge is difficult to apply in narrow places because the width of the bridge increases at both ends of the bridge, and the construction of the inclined girder is complicated as in the method of placing the haunches. There is this.

In order to solve the above problems, the present invention does not need to place a haunch at the end of the girder having a large moment or add a separate reinforcement girder, thereby providing a cross-sectional composite ramen bridge that is easy to construct and shortens the air. I would like to.

In addition, the present invention is to provide a cross-sectional composite ramen bridge structurally easy to change the stress of the cross-sectional force against the external force.

The present invention according to a preferred embodiment to solve the above problems relates to a ramen bridge comprising an alternating position located at both ends of the bridge and the girder is strongly coupled to the upper end and the end of the bridge, the girder has a cross-sectional shape The circular steel pipe is a cross section of the diameter of the circular steel pipe becomes smaller from the end of the girder toward the center, and the shift is composed of a lower shift consisting of concrete, a girder mounting hole coupled to the upper part of the lower shift to support the end of the girder, and concrete The girder holder and the upper end of the girder is formed to be buried in the upper portion of the lower shift, the girder holder is composed of a steel member and a coupling bolt provided on the upper end of the steel member, A first insertion hole into which the steel member is inserted is formed at the lower end of the circular steel pipe end of the girder, A second insertion hole into which the coupling bolt is inserted is formed at an end thereof, and the steel member and the coupling bolt of the girder holder are inserted into an end of the girder, and the girder is mounted on the girder holder, and a nut is coupled to the top of the coupling bolt. It provides a cross-section synthetic ramen bridge characterized in that the girder is fixed to the girder holder.

delete

According to another exemplary embodiment of the present invention, a closed diaphragm is provided at a predetermined distance from a girder end inside a circular steel pipe of the girder, and concrete is poured integrally with an upper shift in a circular steel pipe from a girder end to the closed diaphragm. A cross section synthetic ramen bridge is provided.

The present invention according to another preferred embodiment is provided with a diaphragm between the position where the girder holder is inserted and the closed diaphragm inside the circular steel pipe of the girder, wherein the diaphragm has a concrete inlet formed in the center thereof. Provide a synthetic ramen bridge.

In accordance with another aspect of the present invention, a base plate is coupled to a lower portion of the steel frame member, and a girder holder is coupled to a lower shift by coupling a fixing bar embedded in an upper portion of the lower shift to the base plate. Provide cross-sectional synthetic ramen bridge.

The present invention according to another preferred embodiment provides a cross-sectional synthetic ramen bridge, characterized in that the mounting beam for supporting the lower portion of the circular steel pipe is coupled to one side of the steel frame member.

The present invention according to another preferred embodiment provides a cross-section synthetic ramen bridge, characterized in that a plurality of rib plates are coupled to the outer peripheral surface of the circular steel pipe end of the girder.

The present invention according to another preferred embodiment provides a cross-sectional composite ramen bridge, characterized in that a plurality of shear connection material for the integration with the bridge top plate concrete is coupled to the upper side of the circular steel pipe of the girder.

The present invention according to another preferred embodiment of the girder is the diameter of the circular steel pipe becomes smaller from the end of the girder toward the center, a certain length of the girder center cross section synthetic ramen, characterized in that the diameter of the circular steel pipe is configured to be the same Provide teaching.

The present invention according to another preferred embodiment of the present invention is characterized in that the diameter of the circular steel pipe becomes smaller as the girder goes from the end of the girder to the center, the upper level of the circular steel pipe is constant, and the lower level rises toward the center from the girder end. Provide cross-sectional synthetic ramen bridge.

The present invention according to another preferred embodiment provides a cross-section synthetic ramen bridge, characterized in that the guide plate for guiding the insertion of the steel member is coupled to the front surface of the diaphragm.

According to the present invention as described above, the following effects can be obtained.

First, since there is no need to place the haunch at the end of the girders with large moments or add a separate reinforcement girders, construction is easy and air shortening is possible.

Second, by applying the cross-sectional steel pipe girders that can effectively use the cross-sectional stiffness to the composite ramen bridge, the stress change of the cross-sectional force against the external force is gentle, not only structurally easy, but also improve the economics and aesthetics.

Third, it is advantageous to secure the space for the mold, because no additional haunting is necessary.

Fourth, since the diameter of the cross-section steel pipe girders at the girder end is enlarged, it is possible to adjust the width of the bridge at the bridge end.

Fifth, since the alternating girder mounting hole is inserted into the girder end and concrete is poured into the girder to be integrated with the alternating portion, the moment of the bridge can be effectively transmitted to the alternating portion.

1 is a plan view and a front view showing a conventional cross-sectional synthetic ramen bridge.
It is a front view which shows the cross-section synthetic ramen bridge of this invention.
3 to 5 are diagrams showing the construction sequence of the cross-section synthetic ramen bridge of the present invention.
3 is a perspective view of installing a girder holder in the lower shift.
Figure 4 is a perspective view of installing the girder on the girder mounting holes.
5 is a perspective view showing a state in which concrete is integrally poured on the upper shift and the bridge deck.
6 is an exploded perspective view showing an embodiment of the coupling relationship between the girder holder and the girder.
7 is a cross-sectional view showing an embodiment of a coupling relationship between a girder holder and a girder.
8 is a side view showing another embodiment of the coupling relationship between the girder holder and the girder.
9 is a perspective view showing another embodiment of the coupling relationship between the girder holder and the girder.
10 is a perspective view illustrating a diaphragm with a guide plate attached thereto.
Fig. 11 is a front view showing a cross-section synthetic ramen bridge according to another embodiment of the present invention.
12 is a side view showing an alternation further provided with a steel frame member between girders.

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

It is a front view which shows the cross-section synthetic ramen bridge of this invention.

As shown in FIG. 2, the present invention relates to a ramen bridge including shifts 10 positioned at both ends of a bridge and a girder 20 which is strongly coupled to both ends of the shift 10. Girder 20 is a cross-sectional shape is a circular cross-section of the circular steel pipe becomes smaller as the diameter of the circular steel pipe becomes smaller toward the center, the shift 10 is the lower shift 11, the lower shift ( 11) the girder mounting hole 30 is coupled to the upper portion to support the end of the girder 20, it is made of concrete so that the end of the girder mounting hole 30 and the girder 20 is buried in the upper portion of the lower shift (11) It is characterized by consisting of the upper shift 12 is formed.

The shift 10 is located at both ends of the bridge as a substructure of the bridge and transmits the load from the superstructure to the ground.

The girder 20 is composed of a circular steel pipe, and as shown in Figure 2 is configured as a cross-sectional surface of the diameter of the circular steel pipe becomes smaller from the end to the center.

In the present invention, since the cross-sectional circular steel pipe is used as the girder 20, the stress change of the cross-sectional force with respect to the external force is smooth and structurally easy, and economics and aesthetics can be improved.

In addition, a large cross section can be positioned at the end of the girder 20 of the ramen bridge with a large moment, so that no additional reinforcement girder such as haunch is required, and it is advantageous to secure the space of the die. And since the diameter of the girder 20 itself is enlarged at the end, it is possible to adjust the bridge width, such as expanding the bridge width at the end of the girder 20.

In addition, as can be seen in Figure 2, the girder 20 is smaller in diameter of the circular steel pipe toward the center from the end of the girder 20, the upper level of the circular steel pipe is constant, the lower level is the girder 20 It can be configured to rise from the end toward the center.

In this way, when the upper level of the circular steel pipe is made constant, the upper surface of the bridge top plate 40 is easy to maintain a horizontal plane.

In the present invention, the shift 10 is composed of a lower shift 11, a girder holder 30 and an upper shift 12, these configurations will be described later with reference to FIGS.

3 to 5 is a view showing the construction sequence of the cross-sectional composite ramen bridge of the present invention, Figure 3 is a perspective view of installing the girder mounting hole 30 in the lower shift 11, Figure 4 is a girder mounting hole ( It is a perspective view which installs the girder 20 in 30, and FIG. 5 is a perspective view which shows the state in which the concrete C was integrally poured in the upper alternating 12 and the bridge top plate 40. FIG.

In order to construct the cross-section synthetic ramen bridge of the present invention, first, as shown in FIG. Girder mounting holes 30 on the upper surface of the lower shift (11).

The lower shift 11 is made of concrete, before the construction of the girder mounting hole 30 and the upper shift 12 is poured in advance to cure. The shift 10 is designed in consideration of the load in the horizontal direction due to an earthquake or the like, in addition to the load pressed from the upper portion.

The girder holder 30 is coupled to the upper portion of the lower shift 11 to support the end of the girder 20.

After the girder holder 30 is installed, the girder 20 is installed on the girder holder 30 as shown in FIG. 4, and the upper shift 12 and the bridge top plate 40 as shown in FIG. 5. Pour concrete (C).

At this time, the girder holder 30 of the shift 10 is inserted into the end of the girder 20, concrete (C) is poured into the girder 20, the shift 10 and the girder 20 are integrated, The moment can be effectively transmitted to the shift 10.

FIG. 6 is an exploded perspective view showing an embodiment of a coupling relationship between the girder cradle 30 and the girder 20, and FIG. 7 shows an embodiment of a coupling relationship between the girder cradle 30 and the girder 20. FIG. It is a cross section.

In the present invention, the girder holder 30 is composed of a steel member 31 coupled to the upper end of the lower shift 11 and the coupling bolt 32 provided on the upper end of the steel member 31, the girder 20 A first insertion hole 21 into which the steel member 31 is inserted is formed at the lower end of the circular steel pipe, and a second insertion hole 22 into which the coupling bolt 32 is inserted is formed at the upper end of the girder. Steel member 31 and the coupling bolt 32 of the mounting hole 30 is inserted into the end of the girder 20 so that the girder 20 is mounted on the girder mounting hole 30, the upper end of the coupling bolt 32 It is characterized in that the nut 33 is coupled to the girder 20 to the girder mounting hole (30).

6 to 7, in the present invention, the steel member 31 passes through the first insertion hole 21 of the girder 20, and the coupling bolt 32 is formed of the girder 20. By passing through the two insertion holes 22, the steel frame member 31 of the girder holder 30 is inserted into the end of the girder 20.

To this end, in the present invention, the first insertion hole 21 and the second insertion hole 22 are formed in advance at the lower end and the upper end of the end of the girder 20 when the girder 20 is manufactured. The first insertion hole 21 and the second insertion hole 22 is determined in consideration of the size of the steel frame member 31 and the coupling bolt 32 to be designed.

In order to integrate with the upper shift 12, the outer surface of the steel member 31 may be coupled to the shear connecting member (27).

6 to 7, H-shaped steel was used as the steel member 31, and the coupling bolt 32 was welded to protrude upward from the web side of the steel member 31.

The present invention is provided with a closed diaphragm 23 in a position spaced a predetermined distance from the end of the girder 20 inside the circular steel pipe of the girder 20, the upper portion in the circular steel pipe from the end of the girder 20 to the closed diaphragm 23 It is characterized in that the concrete (C) is poured integrally with the alternating (12).

As a result, since the concrete C poured to the predetermined length of the round steel pipe end is cast integrally with the upper shift 12 and the bridge top plate 40, the moment of the girder 20 can be reliably transmitted to the shift 10. .

The closed diaphragm 23 may be coupled to the inner circumferential surface of the circular steel pipe through welding.

The present invention is provided with a diaphragm 24 between the position of the girder mounting hole 30 is inserted into the inside of the circular steel pipe of the girder 20 and the closed diaphragm 23, the diaphragm 24 is introduced into the concrete Ball 241 is characterized in that it is formed.

The diaphragm 24 is disposed at the end of the circular steel pipe to reinforce the shear force of the steel pipe. The diaphragm 24 is formed with a concrete inlet hole 241 of a predetermined size so that concrete can be introduced to the portion of the waste diaphragm 23.

The diaphragm 24 may be coupled to the inner circumferential surface of the circular steel pipe through welding.

6 to 7, the base plate 34 is coupled to the lower portion of the steel frame member 31, and the fixing rebar 35 embedded in the upper portion of the lower shift 11 is formed. Couple to the base plate 34 is characterized in that the girder holder 30 is coupled with the lower shift (11).

The base plate 34 uses a steel plate, and couples the steel member 31 to the upper portion of the lower shift 11 to evenly transfer the load from the upper structure to the lower shift 11.

The fixing rebar 35 is a buried type in which the upper part of the fixing rebar 35 is exposed to the outside when the lower shift 11 is installed, or the lower shift 11 is constructed such as a strong anchor or a chemical anchor. After completion, it may be buried in the upper portion of the lower shift 11 by using an anchor type method for drilling and fixing the upper surface of the lower shift 11.

In addition, the present invention is characterized in that the mounting beam 36 for supporting the lower portion of the circular steel pipe is coupled to one side of the steel frame member (31).

The mounting beam 36 supports the lower portion of the circular steel pipe, and is coupled to the side of the steel member 31.

6 to 7, the mounting beam 36 has a c shape in cross section, bolted to the outside of both flanges of the steel member 31, respectively. And the one side flange of the mounting beam 36 and the bottom of the girder 20 was combined to fix the girder 20 on the mounting beam 36.

The mounting beam 36 may be installed for each steel member 31, and when one mounting beam 36 is coupled to the plurality of steel members 31 at the same time to level the girder 20 It is advantageous.

8 is a side view illustrating another embodiment of the coupling relationship between the girder holder 30 and the girder 20.

As can be seen in Figure 8, in the present invention is characterized in that the plurality of rib plate 26 is coupled to the outer peripheral surface of the circular steel pipe end of the girder 20.

The rib plate 26 secures the integrity of the circular steel pipe and the concrete of the upper shift 12, and firmly supports the circular steel pipe end to the shift 10 when torsion occurs in the bridge. In FIG. 8, the rib plates 26 are arranged in plural to be spaced apart from each other along the outer circumferential surface of the circular steel pipe.

And in the present invention, the upper side of the circular steel pipe of the girder 20 is characterized in that a plurality of shear connection material 27 for integration with the bridge top plate 40 concrete.

The shear connector 27 is coupled to the upper portion of the circular steel pipe of the girder 20 to integrate the concrete and the girder 20, the bridge top plate 40, the horizontal shear force between the bridge top plate 40 and the girder 20 It resists and prevents the bridge top plate 40 from rising.

Studs, rebars, section steel, etc. may be used as the shear connector 27. In FIG. 8, the stud is welded to the upper surface of the girder 20 by the shear connector 27.

The rib plate 26 is located at a plurality of girder 20 so as to be spaced apart at regular intervals over the entire outer peripheral surface of the circular steel pipe along the outer peripheral surface of the circular steel pipe, the shear connector 27 is the girder 20 Along the length of the girder 20 is located over the entire length of the circular steel pipe.

FIG. 9 is a perspective view showing another embodiment of the coupling relationship between the girder holder 30 and the girder 20, and FIG. 10 is a perspective view showing the diaphragm 24 to which the guide plate 50 is attached.

In the present invention, the front plate of the diaphragm 24 is characterized in that the guide plate 50 for guiding the insertion of the steel frame member 31 is coupled.

That is, when the guide plate 50 consisting of a plurality of plates in advance coupled to the front of the diaphragm 24, when inserting the steel member 31 into the girder 20 through the first insertion hole 21, It may be to guide the direction in which the steel frame member 31 is inserted. This makes it easy to insert the coupling bolt 32 into the second insertion hole 22.

In FIG. 9 to FIG. 10, the guide plates 50 are respectively coupled to the upper and lower portions of the diaphragm 24. The guide plate 50 is manufactured in consideration of the cross section of the steel member 31, and preferably manufactured to face at least two or more surfaces of the steel member 31.

In addition, as shown in FIG. 10, a chamfer is formed at the lower end or side of the plate at which the steel frame member 31 is inserted among the plates constituting the guide plate 50 to facilitate the insertion of the steel frame member 31. Can be.

Fig. 11 is a front view showing a cross-section synthetic ramen bridge according to another embodiment of the present invention.

As shown in FIG. 11, in the present invention, the diameter of the circular steel pipe becomes smaller as the girder 20 goes from the end of the girder 20 toward the center, and the predetermined length of the center portion of the girder 20 is equal to the diameter of the circular steel pipe. Can be configured.

That is, when the cross section of the center part of the girder 20 is too small and there exists a possibility that a deflection may become large, it can couple | bond via cylindrical steel pipe between the cross section circular steel pipes.

In addition, when applied to a span longer than the length of the factory-produced cross-sectional circular steel pipe, the length of the girder 20 can be extended by interposing a cylindrical steel pipe between the cross-sectional circular steel pipe.

Lastly, Figure 12 is a side view showing the shift is further provided with a steel member between the girders.

The steel member 31 may increase the rigidity of the connection portion of the lower shift 11 and the upper shift 12 that is separately poured, and when the rigidity of the steel member 31 is insufficient, as shown in FIG. 12. The steel frame member 31 can also be installed in the further. Thus, by installing the steel member 31, it is possible to integrate the lower shift 11 and the upper shift 12 without a separate joint rebar.

10: shift 11: lower shift
12: upper shift 20: girder
21: first insertion hole 22: second insertion hole
23: closed diaphragm 24: diaphragm
241: concrete inlet hole 26: rib plate
27: shear connector 30: girder holder
31: steel member 32: coupling bolt
33: nut 34: base plate
35: anchoring bar 36: mounting beam
40: bridge top 50: guide plate
C: Concrete

Claims (11)

It relates to a ramen bridge including a shift 10 located at both ends of the bridge and a girder 20 which is strongly coupled to both ends of the top of the shift 10,
The girder 20 is a cross-sectional shape is a cross-sectional shape of a circular steel pipe, the diameter of the circular steel pipe becomes smaller toward the center from the end of the girder 20,
The shift 10 is a lower shift 11 made of concrete, the girder mounting hole 30 is coupled to the upper part of the lower shift 11 to support the end of the girder 20, the lower shift 11 is composed of concrete Consists of the upper girder 12 is formed so that the end of the girder mounting hole 30 and the girder 20 is embedded in the upper,
The girder mounting hole 30 is composed of a steel member 31 coupled to the upper end of the lower shift 11 and the coupling bolt 32 provided on the upper end of the steel member 31,
The first insertion hole 21 into which the steel member 31 is inserted is formed at the lower end of the circular steel pipe end of the girder 20, and the second insertion hole 22 into which the coupling bolt 32 is inserted is formed at the upper end thereof. Formed,
Steel member 31 and the coupling bolt 32 of the girder mounting hole 30 is inserted into the end of the girder 20 so that the girder 20 is mounted on the girder mounting hole 30, the coupling bolt 32 A cross-sectional synthetic ramen bridge, characterized in that the nut 33 is coupled to the top of the girder 20 to fix the girder mounting holes 30.
delete The method of claim 1,
Inside the circular steel pipe of the girder 20, a closed diaphragm 23 is provided at a position spaced apart from the end of the girder 20 by an upper shift 12 in the circular steel pipe from the end of the girder 20 to the closed diaphragm 23. A cross-section synthetic ramen bridge, characterized in that the concrete (C) is poured into a unit.
The method of claim 3,
Inside the circular steel pipe of the girder 20, a diaphragm 24 is provided between the position where the girder holder 30 is inserted and the closed diaphragm 23, and the diaphragm 24 has a concrete inlet hole 241 at the center thereof. A cross-section synthetic ramen bridge, characterized in that) is formed.
The method of claim 1,
A base plate 34 is coupled to the lower portion of the steel frame member 31, and a girder holder 30 is coupled to the base plate 34 by a fixing rebar 35 embedded in an upper portion of the lower shift 11. Composite cross-section ramen bridge, characterized in that coupled to the lower alternating (11).
The method of claim 1,
One side of the steel member 31 is a cross-sectional composite ramen bridge, characterized in that the mounting beam 36 for supporting the lower portion of the circular steel pipe is coupled.
The method of claim 1,
Composite cross-section ramen bridge, characterized in that the plurality of rib plate 26 is coupled to the outer peripheral surface of the circular steel pipe end of the girder (20).
The method of claim 1,
The upper side of the circular steel pipe of the girder 20 bridge cross-section composite ramen bridge, characterized in that a plurality of shear connection material 27 is integrated for integration with the concrete.
The method of claim 1,
The girder 20 is the diameter of the circular steel pipe becomes smaller as the end from the end of the girder 20 toward the center, a certain length of the girder 20, the cross-section synthetic ramen, characterized in that the diameter of the circular steel pipe is configured to be the same Kyo.
The method of claim 1,
The girder 20 is the diameter of the circular steel pipe becomes smaller as it goes from the end of the girder 20 to the center, the upper level of the circular steel pipe is constant, characterized in that the lower level rises toward the center from the end of the girder 20 Cross section synthetic ramen bridge.
5. The method of claim 4,
Cross section synthetic ramen bridge, characterized in that the front plate of the diaphragm 24 is coupled to the guide plate 50 for guiding the insertion of the steel member (31).

Images