KR101954100B1 - Bridge structure for increasing seismic performance - Google Patents

Abstract

The present invention relates to a bridge structure to increase earthquake resistant performance, which comprises: girders installed to be spaced from an upper side of a bridge in the transverse direction by a predetermined interval; a bridge bottom plate installed to be coupled to upper sides of the girders, wherein transverse reinforcing bars are reinforced; a transverse beam disposed in the upper side of the bridge and installed to be coupled to the separately installed girders; and a lower plating slab disposed in the lower side between the girders and installed to be coupled to the front side and the rear side of the transverse beam, wherein transverse reinforcing bars are reinforced. A portion of the transverse reinforcing bars of the bridge bottom plate and a portion of the transverse reinforcing bars of the low plating slab are connected to each other by diagonal tensioned crossing reinforcing bars installed in the transverse beam to increase resistance to an earthquake.

Description

{BRIDGE STRUCTURE FOR INCREASING SEISMIC PERFORMANCE}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a bridge structure for increasing seismic performance, and more particularly, to a bridge structure for increasing seismic capacity by increasing resistance to earthquakes by interconnecting girders.

In the case of prestressed concrete (PSC) girder bridges, steel composite girder bridges, and steel girder bridges, after the girders are mounted on the bridge girder with simple girder bridge, filled concrete is placed between the girder and girder in the longitudinal direction at the bridge girder, A transverse beam is installed between the girders, and a bridge deck having vertical reinforcing bars is installed on the upper side of the girder so as to have continuity.

The above-mentioned construction method has a problem in that when the earthquake occurs due to insufficient resistance to earthquake, the bridge is broken or broken in the unit of span.

In order to solve the above-described problems, a method of installing a seismic isolation device between a pier and a girder has been disclosed. However, the apparatus and the installation process are complicated and the cost is increased.

Therefore, it is required to develop a seismic performance-enhancing bridge structure that assures reliable seismic performance and low cost.

Patent 1: Korean Patent No. 10-1062220

In order to solve the above problems, the present invention is characterized in that girders are provided on the upper side of a pier, a bridge deck having longitudinal reinforcing bars is installed on the upper side of the girders, a transverse beam is installed on the upper side of the pier, , And a bottom plate slab in which longitudinal reinforcing bars are laid on the lower side between the girders and the longitudinal reinforcing bars of the bridge deck and the bottom plate slab are interconnected by the sine officers' And to provide a significantly increased seismic performance bridge structure.

An earthquake-proof performance increasing bridge structure according to an example of the present invention includes: girders installed on a bridge pier at a predetermined interval in a lateral direction; A bridge bottom plate installed on the upper side of the girders and joined to the longitudinal reinforcing bars; A transverse beam installed and coupled between the upper and lower spaced apart girders; And a bottom plate slab which is installed between the girders and on the front and rear sides of the transverse beams and in which longitudinal reinforcing bars are laid, wherein a part of the longitudinal reinforcing bars of the bridge deck and a part of the longitudinal reinforcing bars of the bottom plate slab Are connected to each other by the sinusoidal steel rods installed on the transverse beams, so that the deflection force against the earthquake is increased.

Further, the girders may be a simple girder separated from the upper side of the pier, or a continuous girder connected thereto.

Further, the girder may be a prestressed concrete (PSC) girder, a steel girder, or a steel composite girder.

The girder may be a rectangular girder, a U-girder, or an I-girder.

In addition, the transverse reinforcement rods may have an X-shape, a trapezoidal shape, an inverted trapezoidal shape, an elliptical shape, or a wavy shape when viewed transversely.

In addition, the girders are simple girders separated from the upper part of the pier, and the sole plates provided at the lower part of the separated simple girder are interconnected by a connecting steel plate.

Since some of the longitudinal reinforcing bars provided on the bridge deck and the bottom plate slab are connected to each other by the sinusoidal bridge bars installed on the transverse beams through the present invention, the integrated structure of the girders is strengthened, The resistance against the vertical vibration can be remarkably increased.

Also, the bottom plate slab can resist the compressive force due to the large negative moment generated at the bridge pier.

In addition, since it is not necessary to provide a separate device such as a bridge support having a complicated structure for enhancing the seismic performance, economical efficiency and workability can be greatly improved.

In addition, in the case of the simple girder structure, by providing a connecting steel plate connecting the sole plates of the front and rear girders, it is possible to prevent the girders from being separated and separated from each other by the horizontal vibration or the vertical vibration when an earthquake occurs.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a rectangular girder applied to a simple bridge in an earthquake-proof performance increasing bridge structure according to an example of the present invention. FIG.
Figure 2 is a cross-sectional view of Figure 1;
Fig. 3 is a longitudinal sectional view of Fig. 1. Fig.
Figs. 4A to 4D are views showing the shapes of the sign subassemblies of Fig. 3 arranged in different shapes.
5A and 5B are longitudinal and transverse cross-sectional views showing an I-type girder applied to a continuous bridge in an earthquake-proof performance increasing bridge structure according to an example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

Hereinafter, the structure of the seismic capacity increasing bridge according to one example of the present invention will be described in detail with reference to FIGS. 1 to 5. FIG.

1 to 3, an earthquake-proof performance increasing bridge structure according to an example of the present invention includes girders 10 installed at a predetermined interval in the transverse direction on the upper side of a bridge pier; A bridge deck 20 installed on the upper side of the girders 10 and coupled to the longitudinal reinforcing bars 50; A transverse beam 30 installed between the girders 10 installed above and spaced apart from the piers; And a bottom plate slab 40 installed below the girders 10 and attached to the front and rear of the transverse beam 30 and fitted with longitudinal reinforcing bars 50. The longitudinal direction of the bridge deck 20 Some of the reinforcing bars 50 and some of the longitudinal reinforcing bars 50 of the bottom plate slab 40 may be interconnected by the sinusoidal reinforcing bars 60 installed in the transverse beam 30. [

The girder 10 of this embodiment can be a PSC girder, a steel girder, a steel composite girder, or the like. The cross section of the girder 10 may be a rectangular, U-shaped or I-shaped girder.

The girder 10 can be installed on the upper side of the pier. The girder 10 can be mounted on the upper side of the bridge support 18 provided on the upper side of the pier. The girders 10 may be spaced apart from each other by a predetermined distance in the transverse direction on the upper side of the bridge piers. The girders 10 can be arranged in a line in the longitudinal direction (throttling direction) on the upper side of the pier, that is, in a simple bridge manner.

The bridge bottom plate 20 may be installed on the upper side of the girders 10 and coupled thereto. A stud bolt or the like is provided on the upper side of the girder 10, and concrete of the bridge deck 20 can be poured.

Inside the bridge deck 20, longitudinal reinforcing bars 50 may be longitudinally disposed across the piers. In other words, the bridge deck 20 on the upper side of the bridge pier may be continuous by arranging the longitudinal reinforcing bars 50 on the upper side of the girder 10 and placing the concrete.

A transverse beam 30 may be installed between the girders 10 disposed above and spaced apart from the bridge piers and a filled concrete 12 may be installed between the front and rear girders 10 in the longitudinal direction.

A bottom plate slab (40) may be provided on the front and rear of the transverse beam (30) below the girders (10). The bottom plate slabs 40 may be longitudinally reinforced steel bars 50 across the piers. That is, the longitudinal bars 50 can be installed continuously across the transverse beams 30 to the bottom plate slabs 40 before and after the pier. This bottom plate slab 40 can support and engage the girders 10 in front, back, right and left at the pierce point portion by mutually supporting and coupling the left and right girders 10 and connecting the girders 10 before and after the pier .

The bottom plate slab 40, in which the longitudinal bars 50 are laid, can increase the resistance to horizontal and vertical vibrations acting on the bridge. Also, the bottom plate slab (40) in which longitudinal reinforcing bars (50) are laid can resist the compressive force due to the large negative moment acting on the bridge piercing portion.

The bottom plate slab 40 may be formed on the entirety of the parentage portion of the pierced point portion, or only on a part of the parentage point near the large pierced point portion. That is, the formation range of the bottom plate slab 40 can be selected in consideration of the magnitude of the momentum of the bridge pier, seismic load, and the like.

The transverse beams 30 may be provided with sign strength subracks 60. The signing subclause 60 can couple some of the longitudinal bars 50 of the bridge deck 20 and some of the longitudinal bars 50 of the bottom plate slab 40 to each other. The longitudinal reinforcing bars 50 of the bridge deck 20 and the longitudinal reinforcing bars 50 of the bottom plate slab 40 are connected to each other and the concrete is poured into the bridge decks 60, The transverse beam 30, and the bottom plate slab 40 are combined into an integrated structure so that the resistance against horizontal and vertical vibrations due to an earthquake can be greatly increased.

The sign rollers 60 are disposed separately from the longitudinal reinforcing bars 50 laid on the bridge deck 20 or the longitudinal reinforcing bars 50 laid on the bottom plate slab 40, . The longitudinal reinforcing bars 50 and the longitudinal reinforcing bars 50 to be laid on the bridge deck 20 and the longitudinal reinforcing bars 60 and the bottom plate slab 40 may be formed by bending one reinforcing bar have.

The sign rollers 60 may be formed in an X shape, a trapezoid shape, an inverted trapezoid shape, an elliptical shape, or a wavy shape when viewed in the transverse direction.

Referring to FIG. 3, the sign rollers 60 can be arranged in an X-shape when viewed in the lateral direction. That is, the longitudinal reinforcing bar 50 on the left upper side may be connected to the longitudinal reinforcing bars 50 on the lower right side, and the longitudinal reinforcing bars 50 on the lower left side may be connected to the longitudinal reinforcing bars 50 on the upper right side.

Referring to FIG. 4A, the sign rollers 60 can be trapezoidally shaped when viewed in the lateral direction. That is, the longitudinal reinforcing bar 50 on the left upper side is lowered before the center of the bridge pier, then extends horizontally to connect with the right longitudinal reinforcing bar 50, and the left lower reinforcing bar 50 connects the pier center So that it can be connected to the longitudinal reinforcing bars 50 on the upper right side.

Referring to FIG. 4B, the sign rollers 60 may be arranged in an inverted trapezoidal shape when viewed in the lateral direction. That is, the longitudinal reinforcing bars 50 on the left upper side are connected to the right and left longitudinal reinforcing bars 50 after the center of the piers are crossed, and the left and right longitudinal reinforcing bars 50 are raised before the center of the pier And may be connected to the longitudinal reinforcing bars 50 on the right side.

Referring to FIG. 4C, the sign rollers 60 are arranged in an elliptical shape when viewed in the lateral direction. That is, the longitudinal reinforcing bar 50 on the left upper side is convexly curved after passing the center of the bridge pier, and is connected to the longitudinal reinforcing bar 50 on the lower left side, and the longitudinal reinforcing bar 50 on the upper right side passes the center of the pier And then connected to the right and left lower longitudinal reinforcing bars 50 after being curved convexly.

Referring to FIG. 4D, the sign rollers 60 may be formed in a wavy shape when viewed in the transverse direction. That is, the point where the left vertical upper reinforcing bars 50 are downwardly formed may be formed before and after the center of the bridge pier, respectively, and the point where the left lower vertical reinforcing bars 50 are upwardly positioned may be formed before and after the center of the pier.

The girder 10 may be provided at the center of the girder 10 so as to intersect with each other at the lower side of the girder 10, Or they may be provided so as to intersect with each other on the upper side and the lower side of the girder 10 or may be overlapped with each other so that the connectivity between the girders 10 and the earthquake resistance can be remarkably increased.

The lateral beam 30 can be fitted with the transverse reinforcement together with the sinusoidal subassembly 60. Further, an I-shaped steel material, a steel plate, or the like can be disposed inside the transverse beam 30. When an I-shaped steel material or a steel sheet is disposed on the transverse beam 30, the sinusoidal steel wire rope 60 may be formed by forming a through hole in the I-shaped steel material or the steel sheet and passing through the through hole. Also, it is possible not to penetrate but to connect the I-shaped steel material and the steel plate by welding or the like so as to be continuous to each other.

In the case of steel type I girders (10), point stiffeners and the like can be additionally attached to the upper side of the bridge pier.

The sole plate 14 provided at the lower part of the front and rear girders 10 can be connected to each other by the connecting steel plate 16 provided at the lower side thereof. The connecting steel plate 16 can minimize or prevent the phenomenon that the girder 10 is detached from the bridge pier by the horizontal or vertical vibration caused by the earthquake.

With reference to Fig. 5, an embodiment in which the earthquake-proof performance increasing bridge structure, which is an example of the present invention, is applied to a continuous bridge of a steel type I girder will be described.

In the case of continuous bridges, there is a difference from simple bridges in that the girders 10 are continuous from the top of the bridge to the longitudinal direction.

An I-shaped steel material or a steel plate is provided inside the transverse beams 30 provided between the girders 10 in the transverse direction so that the girders 10 can be connected in the lateral direction. When an I-shaped steel material or a steel plate is installed, the sinusoidal steel line 60 may be formed by forming an I-shaped steel material or a through hole in the steel plate and penetrating the through hole. The girder 10 on the upper side of the pier may be provided with a point reinforcement to reinforce the upper and lower flanges by joining the web together.

5B, the sign subassembly 60 interconnects the longitudinal beams 50 of the bridge deck 20 and the longitudinal bars 50 of the bottom plate slab 40 across the transverse beam 30 up and down . The bottom slab 40 may be installed between the webs of the adjacent girder 10.

As a result, according to the present invention, the sign girder subway steel rods 60 laid on the transverse beam 30 mutually connect the longitudinal steel rods 50 laid on the bridge bottom plate 20 and the bottom plate slab 40, The bridge deck 20, the transverse beam 30, and the bottom plate slab 40 are integrated with each other, and the seismic performance of the bridge can be greatly increased.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

10: Girder
12: Filled concrete
14: sol plate
16: Connection steel plate
18: Bridge support
20: Bridge deck
30: Horizontal beam
40: bottom plate slab
50: longitudinal reinforcement
60: Sign officer, Ch'ang-geun

Claims (6)

Girders installed on the upper side of the piers so as to be spaced apart from each other in the transverse direction;
A bridge bottom plate installed on the upper side of the girders and joined to the longitudinal reinforcing bars;
A transverse beam installed and coupled between the upper and lower spaced apart girders;
And a bottom plate slab that is installed between the girders and disposed on the front and rear sides of the transverse beams and in which longitudinal reinforcing bars are laid,
Part of the longitudinal reinforcing bars of the bridge deck and part of the longitudinal reinforcing bars of the bottom plate slab are connected to each other by the sign railway bars installed on the transverse beams,
Characterized in that said sign subracks have an X shape, a trapezoidal shape, an inverted trapezoidal shape, an elliptical shape, or a wavy shape when viewed transversely.
The method according to claim 1,
Wherein the girders are simple girders separated from the upper side of the bridge piers or connected continuous girders.
The method according to claim 1,
Wherein the girder is a prestressed concrete (PSC) girder, a steel girder, or a steel composite girder.
The method according to claim 1,
Wherein the girder is a rectangular girder, a U girder, or an I girder.
delete The method according to claim 1,
Wherein the girders are simple girders separated from the upper part of the pier, and the sole plates provided respectively under the separated simple girders are connected to each other by connecting steel plates.

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