KR101664283B1 - Composite girder having symmetric structure - Google Patents

Composite girder having symmetric structure Download PDF

Info

Publication number
KR101664283B1
KR101664283B1 KR1020160050889A KR20160050889A KR101664283B1 KR 101664283 B1 KR101664283 B1 KR 101664283B1 KR 1020160050889 A KR1020160050889 A KR 1020160050889A KR 20160050889 A KR20160050889 A KR 20160050889A KR 101664283 B1 KR101664283 B1 KR 101664283B1
Authority
KR
South Korea
Prior art keywords
steel plate
girder
supported
steel
lower steel
Prior art date
Application number
KR1020160050889A
Other languages
Korean (ko)
Inventor
표옥근
Original Assignee
(주)신흥이앤지
주식회사 지에스웹
주식회사 신흥
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by (주)신흥이앤지, 주식회사 지에스웹, 주식회사 신흥 filed Critical (주)신흥이앤지
Priority to KR1020160050889A priority Critical patent/KR101664283B1/en
Application granted granted Critical
Publication of KR101664283B1 publication Critical patent/KR101664283B1/en

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D1/00—Bridges in general
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/12—Grating or flooring for bridges; Fastening railway sleepers or tracks to bridges
    • E01D19/125—Grating or flooring for bridges
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The present invention is characterized in that a first lower steel plate (22) having a curvature in which a central portion is curved downward and whose width increases from a central portion to both left and right sides, And a second lower steel plate 26 formed of a pair of left and right upper and lower portions supported by the upper portion of the alternating portion 10 while both ends of the upper steel plate girder 26 extending along the left and right corner portions extend and extend at a predetermined angle in the outward direction. (20); A steel pipe girder (30) whose lower portions are joined along the upper curvature of the second lower steel plate (26); An upper steel plate girder (40) having a curvature in which a left side and a right side are coupled along respective inner surfaces of mutually opposing steel pipe girders (30), the center portion of which is curved upwardly corresponding to the curvature of the steel pipe girder (30). The corrugated structure is formed between the lower steel plate girder 20 and the upper steel plate girder 40 so that each trough portion is coupled to the lower steel plate girder 20 and each mountain portion is coupled to the upper steel plate girder 40 Supported steel (50); A steel cable 60 fixed to the upper portion of the alternating system 10 at both ends thereof and disposed linearly in a space between the lower steel plate girder 20 and the upper steel plate girder 40; And a tread (70) provided along the upper part of the upper steel plate girder (40).

Description

Composite girder having symmetric structure < RTI ID = 0.0 >

More particularly, the present invention relates to a girder having a cross-section of an inverted triangular structure and having a symmetrical structure in which the vertical height becomes smaller and the width increases from the central portion toward both sides, and the flexural rigidity due to the load is increased, The present invention relates to a composite girder having a symmetrical structure which is structurally very stable even when the width of the span can be easily expanded without using the steel pipe girder of the present invention.

In the walking bridge, the girder supports many loads of the bridge itself and the loads of the pedestrians, and simultaneously transmits the loads acting on it. As a result, many steel structures are used for construction. Especially, in case of box girder girder, And is also widely used as a girder for walking bridges because it has good flexural rigidity against a working load.

The box-shaped steel girder is characterized in that a steel plate having a predetermined vertical height is disposed on each of the left and right sides, and each of the upper and lower portions is connected with a flat plate to form a rectangular cross-sectional structure. However, such a box-shaped steel girder has a disadvantage in that it can not adequately cope with a change in bending moment acting in the longitudinal direction of the bridge in that the cross section is formed in a rectangular shape.

Among the proposed techniques for improving the disadvantages of the conventional box girder, there is Korean Patent No. 1418758. 9 and 10, the steel girder 10 supporting the upper plate 2 is formed in a box shape having a semicircular cross section, in which the vertical height of the steel girder 10 is set to the left and right sides It is possible to appropriately cope with a change in bending moment acting in the longitudinal direction of the bridge.

However, when the girder supporting the upper plate is formed in a box shape, when a load acts on the bridge, compressive force is generated in the upper portion of the box-shaped steel girder and tensile force is generated in the lower portion thereof. This technique is not easy to expect from the originally intended effect in that the central part of the bridge where the bending moment acts the most is composed of the asymmetric box girder.

Korean Patent No. 1418758

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the problems of the prior art, and it is an object of the present invention to provide a bending machine capable of coping with a bending moment acting in the longitudinal direction of a bridge without using a large- And to provide a composite girder having a symmetrical structure that can be installed with a long span.

In order to accomplish this object, the present invention provides an alternating (10) A first lower steel plate 22 having a curvature in which the central portion is curved downward and whose width increases from the central portion to both the left and right sides and is supported by the upper portion of each of the opposite ends, The upper and lower portions of the first lower steel plate 22 are joined together along the left and right corners of the first lower steel plate 22, and the upper end portions thereof extend in the outward direction at a predetermined angle, A lower steel plate girder 20 made of a second lower steel plate 26 whose vertical height becomes smaller toward the left and right sides from the central portion; A steel pipe girder 30 having a pair of left and right portions supported by an upper portion of the alternating system 10, the lower portions of the steel pipe girder 30 being joined along the upper curvature of the second lower steel plate 26; The left and right sides of the steel pipe girder 30 are joined along the inner surfaces of the steel pipe girders 30 facing each other. The center portion of the steel pipe has a curvature corresponding to the curvature of the steel pipe girder 30, An upper steel plate girder (40) supported by a portion; The corrugated structure is formed between the lower steel plate girder 20 and the upper steel plate girder 40 so that each trough portion is coupled to the lower steel plate girder 20 and each mountain portion is coupled to the upper steel plate girder 40 Supported steel (50); A steel cable 60 fixed to the upper portion of the alternating system 10 at both ends thereof and disposed linearly in a space between the lower steel plate girder 20 and the upper steel plate girder 40; A tread plate 70 provided along the upper portion of the upper steel plate girder 40; And a plurality of vent pipes 90 connected to the pair of left and right second lower steel plates 26 and spaced apart from each other by a predetermined distance.

The stranded steel material 50 may be arranged in a straight line passing between the central portions of the pair of right and left struts 50. [

The reinforced concrete 80 may be filled in a space between the lower steel plate girder 20 and the upper steel plate girder 40, which are in contact with and supported by the upper portion of the alternation 10.

An auxiliary steel pipe girder 25 is disposed and coupled between both left and right corner portions of the first lower steel plate 22 and a lower end portion of each of the second lower steel plates 26, Each of the regions can be supported by the upper region of the alternate 10.

delete

The present invention is configured to support a bridge as a composite girder having a symmetrical structure in which the cross section is inversely triangular and the central portion is convex and the vertical height is decreased as the bridge portion is left and right and the steel cable is supported at the longitudinal section, It is possible to disperse the bending moment acting most effectively, and it is possible to construct a long span bridge having a stable structure without using a large diameter steel pipe.

Further, the present invention proposes a structure in which reinforcing concrete is filled at both ends of a composite girder which is alternately supported or a structure in which a vent pipe integrated with a composite girder is added, thereby further improving the structural stability of the bridge, This allows the load to be significantly reduced.

1 is a schematic perspective view of a composite girder according to an example of the present invention;
2 is a schematic bottom view of a composite girder according to an example of the present invention;
3 is a schematic side cross-sectional view of a composite girder according to an example of the present invention.
4 is a cross-sectional view of the line AA 'in FIG. 3;
5 is a schematic side view of a composite girder according to an example of the present invention.
6 is a schematic internal configuration view of a composite girder according to an example of the present invention;
7 is a schematic side cross-sectional view of a composite girder according to another example of the present invention.
8 is a cross-sectional view of the line BB 'in FIG. 7;
Fig. 9 and Fig. 10, respectively, show a schematic configuration of a conventional box-type steel girder.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the technical features of the present invention, A detailed description thereof will be omitted.

1 and 2 show a schematic perspective view and a bottom view, respectively, of a composite girder according to an example of the present invention, wherein each of Figs. 3 and 4 show a schematic side cross- 5 and 6 each show a schematic side view and a schematic internal view of a composite girder according to an example of the present invention.

As shown in each drawing, the present invention is a composite girder in which both end portions are supported and installed by alternation 10, wherein the composite girder according to the present invention comprises a lower steel plate girder 20, a steel pipe girder 30, A girder 40, a supported steel material 50, a steel cable 60, a tread plate 70, and the like. Hereinafter, each of these configurations will be described in detail.

The alternating sections 10 are spaced apart from one another by a predetermined distance and absorb and disperse the load transmitted through the composite girder. Although only a pair of left and right alternatives are shown in the drawing, additional piers may be provided between the alternations. Reference numeral 12 denotes an installation stage provided at an upper portion of the alternation 10.

The lower steel plate girder 20 is composed of a first lower steel plate 22 and a second lower steel plate 26 having a predetermined thickness. 3 and 4, the first lower steel plate 22 forms a lower portion of the composite girder. The first lower steel plate 22 has a curvature in which the central portion is curved downward, and the width is increased from the central portion to both left and right sides. And each of the opposite ends is supported by an installation end 12 of the alternation 10.

The second lower steel plate 26 is a pair of side portions of the composite girder and is joined to each of the left and right sides of the first lower steel plate 22. The vertical height of each of the second lower steel plates 26 is reduced toward the left and right sides . That is, the convex lens has a vertically symmetric structure and a symmetrical structure with a convex central portion. In addition, each of the second lower steel plates 26 is supported by the installation end 12 of the alternation 10, with the extending upper end portion extending outward at a predetermined angle.

Each of the lower portions of the steel pipe girder 30 is coupled along the upper curvature of the second lower steel plate 26. The steel pipe girder absorbs the compressive force acting on the bridge and transfers it alternately.

The upper steel plate girder 40 is an upper portion of the composite girder and is joined along the inner surfaces of the steel pipe girders 30 facing each other on the left side and the right side as shown in Fig. Is supported by stage (12). The upper steel plate girder 40 is also joined to correspond to the upper curvature of the second lower steel plate 26 because the steel pipe girder 30 is coupled corresponding to the upper curvature of the second lower steel plate 26, The girder has a gentle curvature with the central portion protruding upward.

If the composite girder supporting the bridges has the inverted triangular cross-sectional structure and the central portion is convex and the vertical height decreases as the bridge is leftward and rightward, unlike the above-mentioned Korean Patent No. 1418758, The bending moment acting largely can be most appropriately dispersed, so that the structural stability of the bridge can be secured. In addition, since the steel pipe girder itself is combined with the second steel plate to form a composite girder, it is possible to construct a long-span bridge having a stable structure without using a large diameter steel pipe.

The present invention is not limited to the case where the first lower steel plate 22 is coupled to the second lower steel plate 26 via the secondary steel pipe girder 25 as shown in Figs. 7 and 8, respectively, I never do that. At this time, the lower end portions of the second lower steel plates 26 are joined along one side of the upper portion of the secondary steel pipe girder 25, and the left and right corner portions of the first lower steel plate 22 are joined along the inner side of the secondary steel pipe girder 25 And both ends of each of the secondary steel pipe girders 25 can be supported by the installation end 12 of the alternation 10. [

If the secondary steel pipe girder is mediated between the first and second lower steel plates, the secondary steel pipe girder has a gentle curvature that is sagged downward at the central portion as opposed to the steel pipe girder. It is obvious that the rigidity of the composite girder can be further improved if the upper portion of the second lower steel plate is supported by the steel pipe girder and the lower portion of the second lower steel plate is supported by the secondary steel pipe girder.

3 and 5, the lower steel plate girder 20 and the upper steel plate girder 40, which are held in contact with the installation end 12 provided at the upper portion of the alternate 10, And the reinforced concrete 80 is filled in the reinforced concrete 80. [ It is preferable that the length of the reinforced concrete to be filled is located within the width of the installation end 12 as shown in FIG. When the reinforced concrete is filled, both ends of the composite girder can be supported more reliably in alternation, so that the structural stability of the bridge can be further improved.

The supported steel material 50 is a means for supplementing the rigidity of the composite girder according to the present invention. 3 and 6, each of the troughs 50 is formed between the lower steel plate girder 20 and the upper steel plate girder 40 so as to have a corrugated structure, And each of the acid sites is coupled to the upper steel plate girder 40. [0035] Although the drawing shows an example of a corrugated structure in which the braided steel material is continuous, the present invention does not exclude the case where the corrugated steel structure has a continuous structure.

The steel cables 60 are arranged linearly in the space between the lower steel plate girder 20 and the upper steel plate girder 40 and both ends are fixedly connected to the installation end 12 of the alternation 10. When the reinforced concrete 80 is filled in the space between the lower steel plate girder 20 and the upper steel plate girder 40 supported by the shift 10, the steel cable 60 passes through the reinforced concrete 80 as shown in FIG. 6 And is fixedly coupled to the installation end 12.

As can be seen from FIG. 3, when the steel cable is disposed between the lower steel plate girder and the upper steel plate girder in a straight line, the center axis passing through the longitudinal section of the composite girder according to the present invention is formed. That is, the structural stability of the composite girder is further enhanced when the load of the bridge acts on the composite girder as the steel cable supports the longitudinal section of the composite girder.

In this case, the steel cables 60 are formed as a pair of right and left facing each other and are arranged in a straight line passing between the central portions of the braided steel material 50 provided between the lower steel plate girder 20 and the upper steel plate girder 40 . The structural stability of the composite girder can be further improved if the supported strands 50 consist of left and right pairs and continue and the steel cable 60 is positioned between the pair of right and left struts 40. [

Further, the present invention proposes a case in which a vent pipe 90 is further formed in the composite girder. As shown in FIG. 6, the vent pipe 90 has a tubular structure formed through a pair of opposing right and left second lower steel plates 26, and a plurality of the vent pipes 90 may be spaced apart from each other by a predetermined distance. The ventilation pipe can reduce the wind load acting on the bridge by passing wind acting as a side surface of the composite girder and also has a unified structure vertically connecting a pair of left and right second lower steel plates 26 facing each other The structural stability of the composite girder can be further improved.

The tread plate 70 is a part of the walkway in the walking bridge. The tread plate 70 may be formed of a series of step decks and may be supported by a support steel wire 72 installed on the upper steel plate girder 40. Reference numeral 74 denotes a handrail.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. It will be apparent that the present invention can be practiced with added features.

10: Alternation 20: Lower steel plate girder
30: steel pipe girder 40: upper steel plate girder
50: Supported steel material 60: Steel cable
70: Step plate 80: Reinforced concrete
90: vent pipe

Claims (5)

A girder which is supported and installed at an alternation (10) where both end portions are spaced apart from each other by a predetermined distance,
A first lower steel plate 22 having a curvature in which the central portion is curved downward and whose width increases from the central portion to both the left and right sides and is supported by the upper portion of each of the opposite ends, The upper and lower portions of the first lower steel plate 22 are joined together along the left and right corners of the first lower steel plate 22, and the upper end portions thereof extend in the outward direction at a predetermined angle, A lower steel plate girder 20 made of a second lower steel plate 26 whose vertical height becomes smaller toward the left and right sides from the central portion;
A steel pipe girder 30 having a pair of left and right portions supported by an upper portion of the alternating system 10, the lower portions of the steel pipe girder 30 being joined along the upper curvature of the second lower steel plate 26;
The left and right sides of the steel pipe girder 30 are joined along the inner surfaces of the steel pipe girders 30 facing each other. The center portion of the steel pipe has a curvature corresponding to the curvature of the steel pipe girder 30, An upper steel plate girder (40) supported by a portion;
The corrugated structure is formed between the lower steel plate girder 20 and the upper steel plate girder 40 so that each trough portion is coupled to the lower steel plate girder 20 and each mountain portion is coupled to the upper steel plate girder 40 Supported steel (50);
A steel cable 60 fixed to the upper portion of the alternating system 10 at both ends thereof and disposed linearly in a space between the lower steel plate girder 20 and the upper steel plate girder 40;
A tread plate 70 provided along the upper portion of the upper steel plate girder 40;
A plurality of vent pipes 90 connected to the pair of left and right second lower steel plates 26 and spaced apart from each other by a predetermined distance;
Composite girder with symmetrical structure. The method according to claim 1,
Wherein the stranded steel material (50) is composed of a pair of right and left facing each other, and the steel cable (60) is disposed in a straight line passing between the central portions of the pair of right and left struts . The method according to claim 1,
Wherein a reinforcing concrete (80) is filled in a space between a lower steel plate girder (20) and an upper steel plate girder (40), which are in contact with and supported by the upper portion of the alternation (10). The method according to claim 1,
An auxiliary steel pipe girder 25 is disposed and coupled between both left and right corner portions of the first lower steel plate 22 and a lower end portion of each of the second lower steel plates 26, Is supported by the upper portion of the alternating (10). delete
KR1020160050889A 2016-04-26 2016-04-26 Composite girder having symmetric structure KR101664283B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020160050889A KR101664283B1 (en) 2016-04-26 2016-04-26 Composite girder having symmetric structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020160050889A KR101664283B1 (en) 2016-04-26 2016-04-26 Composite girder having symmetric structure

Publications (1)

Publication Number Publication Date
KR101664283B1 true KR101664283B1 (en) 2016-10-10

Family

ID=57146000

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020160050889A KR101664283B1 (en) 2016-04-26 2016-04-26 Composite girder having symmetric structure

Country Status (1)

Country Link
KR (1) KR101664283B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101791521B1 (en) * 2017-05-29 2017-10-30 (주)신흥이앤지 Pedestrian bridge supported by numerous V-stands
KR101820375B1 (en) * 2017-06-15 2018-01-19 (주)신흥이앤지 Bridge structure supported by steel box girder and central separator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090008070A (en) * 2007-07-16 2009-01-21 아주대학교산학협력단 A superstructure of a prefabricated bridge
KR101418758B1 (en) 2013-06-27 2014-08-13 오석환 Round type changing section steel girder, steel girder bridge with round type changing section and manufacuring method for the steel girder having round type changing section
KR101431641B1 (en) * 2014-05-09 2014-08-20 박정환 Double layered bridge by the space truss using steel pipe girder

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20090008070A (en) * 2007-07-16 2009-01-21 아주대학교산학협력단 A superstructure of a prefabricated bridge
KR101418758B1 (en) 2013-06-27 2014-08-13 오석환 Round type changing section steel girder, steel girder bridge with round type changing section and manufacuring method for the steel girder having round type changing section
KR101431641B1 (en) * 2014-05-09 2014-08-20 박정환 Double layered bridge by the space truss using steel pipe girder

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101791521B1 (en) * 2017-05-29 2017-10-30 (주)신흥이앤지 Pedestrian bridge supported by numerous V-stands
KR101820375B1 (en) * 2017-06-15 2018-01-19 (주)신흥이앤지 Bridge structure supported by steel box girder and central separator

Similar Documents

Publication Publication Date Title
CN102209821B (en) Formed steel beam for steel-concrete composite beam and slab
KR101783035B1 (en) Corrugated Deck Having Inverted Triangle Truss Girder
KR101065633B1 (en) Prestressed steel tubular truss beam by external prestressing method
KR101791521B1 (en) Pedestrian bridge supported by numerous V-stands
KR101885735B1 (en) Deck Having Truss Girder with stiffened top-chord of formed steel section
KR101664283B1 (en) Composite girder having symmetric structure
KR20160145261A (en) Composite corrugated deck unified inverted triangle truss and distributing bar
KR20190012766A (en) Built-Up Beam
KR20160073710A (en) Prestressed Steel-Concrete Composite Box Girder, Bridge using such Composite Box Girders, and Continuous Structure of such Composite Box Girders
KR101329434B1 (en) Composite Beam With Slit-typed Web
KR101814754B1 (en) Built-Up Beam
KR101691914B1 (en) Hybrid girder structure having truss and tension cable
KR102186162B1 (en) Deck-Plate with Spacer for Long Span
KR101635523B1 (en) Truss bridge supported by cylindrical girder
KR101616988B1 (en) Prestressed Steel Tubular Truss Girder by External Prestressing Method
KR101744333B1 (en) Corrugated Slim Deck Reinforced Having Truss Girder
KR101806211B1 (en) Pedestrian bridge supported by arch-pipe having variable curvature
KR101883116B1 (en) Steel bridge supported by hybrid structures
KR20140126931A (en) Hybrid superstructure of continuous bridge for supressing out-of-plane bending moment on crossbeams which support stringer
KR101858534B1 (en) Arch bridge comprised of iron strip girder
KR101027751B1 (en) Steel pipe girder
KR101648035B1 (en) Composite girder having symmetric structure
KR19990068800A (en) Assembly tensioning steel girder beam
KR100550241B1 (en) Girder bridge
KR101791978B1 (en) Pedestrian bridge supported by double-arch structure

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right
GRNT Written decision to grant
FPAY Annual fee payment

Payment date: 20190926

Year of fee payment: 4