KR20090063393A - Prestressed beam - Google Patents

Prestressed beam Download PDF

Info

Publication number
KR20090063393A
KR20090063393A KR1020070130732A KR20070130732A KR20090063393A KR 20090063393 A KR20090063393 A KR 20090063393A KR 1020070130732 A KR1020070130732 A KR 1020070130732A KR 20070130732 A KR20070130732 A KR 20070130732A KR 20090063393 A KR20090063393 A KR 20090063393A
Authority
KR
South Korea
Prior art keywords
steel wire
prestressed
lower flange
flange portion
beam member
Prior art date
Application number
KR1020070130732A
Other languages
Korean (ko)
Inventor
윤동용
Original Assignee
현대제철 주식회사
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 현대제철 주식회사 filed Critical 현대제철 주식회사
Priority to KR1020070130732A priority Critical patent/KR20090063393A/en
Publication of KR20090063393A publication Critical patent/KR20090063393A/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
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/02—Bridges characterised by the cross-section of their bearing spanning structure of the I-girder type
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
    • 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
    • E01D2101/30—Metal
    • E01D2101/32—Metal prestressed

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The present invention relates to a prestressed beam and includes a beam member (10) having upper and lower flange portions (12, 13) at both ends of the web portion (11), and a lower flange portion (13) of the beam member (10). A prestressed wire member 20 mounted on a lower surface and applying a compressive force, and a wire wire inserting portion 31 mounted on a lower surface of the lower flange 13 of the beam member 10 and into which the prestressed steel member 20 is inserted. It is to include a steel wire cover member 30 is formed.

In the present invention, since the prestressed wire member 20 is inserted into the steel wire inserting portion 31 of the wire cover member 20 and fixed to the lower surface of the lower flange portion 13, the prestressed steel wire member 20 ) And to prevent damage.

In addition, the compressive force of the prestressed steel wire member 20 is applied to the lower flange portion 13 and the steel wire cover member 30 to have a double effect of further increasing the rigidity by the prestress.

In addition, after the completion of the construction of the beam member 10 by mounting the prestressed steel wire member 20 to the lower portion of the lower flange portion 13 to apply the prestress can prevent transverse buckling of the beam member 10 in accordance with the prestress application It works.

Description

Prestressed Beam

The present invention relates to a prestressed beam, and more particularly, to protect the prestressed steel wire mounted on the lower portion of the prestressed beam and to increase the compression efficiency of the prestressed steel wire.

Generally, steel beams such as H beams and I beams are used as girders of bridges or supporting beams for supporting building floors or ceilings, and are widely used as pillars or beams for civil engineering and building construction.

When the steel beam is used as a girder or support beam of a bridge, the structure mainly supports a load on the upper side, and a compressive force is generated on the upper flange side under load, and a tensile force corresponding to the compressive force is generated on the lower flange side. .

When the steel beam is used as a girder of a bridge or a support beam of a building or civil engineering structure, there is a risk of being easily broken by the tensile force generated on the lower flange side.

The prestressed beam solves the above problems, and increases the durability against load by applying a compressive force to the lower flange in advance with a prestressed steel wire.

Meanwhile, as shown in FIG. 1A, the prestress beam is applied to the prestressed wire member 20 by welding the prestressed steel wire member 20 to the lower flange portion 13 of the beam member 10 such as the H beam or the I beam.

The prestressed steel wire member 20 is fixed to the steel wire fixing portion 14 provided at both ends of the bottom surface of the lower flange portion 13 in the state that the tensile force is applied to the lower flange portion 13 of the beam member 10 To generate a compressive force.

In addition, the prestressed beam is loaded on the upper portion of the upper flange portion 12 from the beam member 10, such as H beam or I beam, as shown in Figure 1b after the lower flange portion 13 is tensioned by the load It is also possible to form a concrete block (13a) in the) to be made of a pre-flex composite beam applying prestress.

However, the conventional prestressed beam is fixed to both ends of the prestressed steel wire to the steel wire fixing part provided on the lower surface, and the prestressed steel wire is exposed to the outside during construction, so that the construction frequently encounters damage or breakage by hitting other structures. This was there.

In addition, in the conventional prestressed beam, when the prestressed steel wire is deviated from the outside, the rigidity of the load suddenly decreases, and the safety of the construction, that is, the bridge, the building, etc. is greatly reduced, and there is a closed end requiring reinforcement construction to repair it. .

In addition, in the conventional prestressed beam, the pre-stressed steel wire is fixed in advance to the lower flange portion before construction, so that the lateral buckling occurs due to the compressive force acting by the prestressed steel wire before construction.

SUMMARY OF THE INVENTION An object of the present invention is to provide a prestressed beam that protects the prestressed steel wire by external impact to increase durability, as well as to increase the rigidity against the load by applying the prestressed double.

It is another object of the present invention to provide a prestressed beam that can prevent transverse buckling caused by applying prestress to steel beams in advance by applying prestress to the structure.

The object of the present invention is a beam member having upper and lower flanges at both ends of the web portion;

A prestressed steel wire member mounted on a lower surface of the lower flange portion of the beam member to apply a compressive force;

It is solved by providing a prestressed beam including a steel wire cover member mounted to a lower surface of the lower flange of the beam member and having a steel wire inserting portion into which the prestressed steel wire member is inserted.

According to the present invention, since the prestressed wire member is protected by being inserted into the wire inserting portion of the wire cover member, the prestressed wire member is prevented from being damaged by external shock.

In addition, since the compressive force of the prestressed steel wire member is applied to the lower flange portion and the steel wire cover member double, there is an effect to further increase the rigidity by the prestress.

In addition, after the completion of the construction of the beam member by mounting the prestressed steel wire member in the lower portion of the lower flange portion by applying the prestress has the effect that can prevent the lateral buckling of the beam member due to the pre-press application.

When described in detail with reference to the accompanying drawings a preferred embodiment of the present invention.

Figure 2 is an exploded perspective view of the present invention, showing the configuration of the prestress beam of the present invention.

3A to 3B are cross-sectional views showing an embodiment of the present invention, and shows an example of reinforcing rigidity by concrete being poured into a steel wire inserting portion of a steel wire cover member.

4 is a diagram illustrating a state of use of the present invention, in which a steel wire cover member and a prestressed steel wire member are mounted and fixed to a lower flange portion in a state where a beam member is installed in a structure.

Hereinafter, as shown in FIGS. 2 to 3A and 3B, the beam member 10 of the present invention is provided with the upper flange portion 12 and the lower flange portion 13 at both ends of the web portion 11. Is a structural steel material that is hot-rolled beam blank, bloom, billet, which is an intermediate product produced through steelmaking. In addition, steel beams of any shape are included in the configuration of the present invention.

 The lower flange portion 13 of the beam member 10 is equipped with a steel wire fixing portion 14 to which both ends of the prestressed steel wire member 20 are fixed to both ends of the bottom.

The prestressed steel wire member 20 is mounted by welding both ends of the prestressed steel wire member 20 to the steel wire fixing part 14 provided on the lower flange portion 13 in a state where a pre-tension force is applied in advance. It may be mounted by forming a bolt portion at the end and fastening the nut to the bolt portion.

That is, the prestressed steel wire member 20 generates a compressive force on the lower flange portion 13 to increase the resistance to the tensile force generated in the lower flange portion 13 when a load is applied to the upper portion of the beam member 10 beam Increasing the rigidity of the member 10, which is known in the art and detailed description of the material and shape will be omitted.

The prestressed wire member 20 is mounted on the lower surface of the lower flange portion 13 of the beam member 10 as described above, it is mounted in the state of being inserted into the steel wire cover member 30.

The steel wire cover member 30 is provided with side portions 30a protruding from both ends, and the steel wire inserting portion 31 into which the prestressed steel wire member 20 is inserted into the upper portion is opened between the side portions 30a. It is formed.

In the present invention, the prestressed wire member 20 is installed at both ends of the steel wire inserting portion 31 so as to be fixed in a state in which tension is applied to the steel wire fixing portion 14, and thus the lower flange portion of the beam member 10 is fixed. (13) will be positioned below the bottom surface.

The steel wire cover member 30 is fixed by welding the side portion (30a) to the lower surface of the lower flange of the beam member (10).

The lower flange portion 13 of the beam member 10 and the steel wire cover member 30 mounted on the lower flange portion 13 are each provided by a prestressed steel wire member 20 mounted in a state where a tensile force is applied to the lower surface. The compression force increases the rigidity against the load.

In addition, the steel wire cover member 30 is to protect the prestressed steel wire member 20 from the external impact during or after construction by preventing the exposure to the outside wrapped around the prestressed steel wire member 20 and both sides.

By filling the concrete 31 or mortar with the steel wire inserting portion 31 to cure, the lower flange portion 13 of the beam member 10 and the prestressed beam, the steel wire cover member 30, as well as to reinforce the bonding force It is preferable to reinforce the rigidity of the flange portion 13.

As shown in FIG. 4, the prestressed wire member 20 is preferably mounted and fixed to the lower flange portion 13 of the beam member 10 after the beam member 10 is installed in the structure.

Since the prestressed steel wire member 20 is fixedly mounted to the lower flange portion 13 after the beam member 10 is installed, it is possible to prevent the lateral buckling generated while the compressive force is applied to the beam member 10 for a long time.

The present invention is not limited to the above-described embodiments, and various changes can be made without departing from the gist of the present invention, which is understood to be included in the configuration of the present invention.

1a to 1b is a front view showing an embodiment of a conventional prestressed beam

2 is an exploded perspective view of the present invention

3A to 3B are cross-sectional views showing one embodiment of the present invention.

4 is a state diagram used in the present invention

* Description of the major symbols in the drawings *

10 beam member 11 web portion

12: upper flange portion 13: lower flange portion

20: prestressed steel wire member 30: steel wire cover member

31: concrete

Claims (3)

Beam members having upper and lower flange portions at both ends of the web portion; A prestressed steel wire member mounted on a lower surface of the lower flange portion of the beam member to apply a compressive force; It is solved by providing a prestressed beam including a steel wire cover member mounted to a lower surface of the lower flange of the beam member and having a steel wire inserting portion into which the prestressed steel wire member is inserted. The method according to claim 1, Prestress beam, characterized in that the inside of the steel wire insertion portion is filled with any one of the concrete, mortar is cured. The method according to claim 1, The prestressed steel wire member is a prestressed beam, characterized in that is mounted and fixed to the lower flange of the beam member after installing the beam member on the structure.
KR1020070130732A 2007-12-14 2007-12-14 Prestressed beam KR20090063393A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070130732A KR20090063393A (en) 2007-12-14 2007-12-14 Prestressed beam

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070130732A KR20090063393A (en) 2007-12-14 2007-12-14 Prestressed beam

Publications (1)

Publication Number Publication Date
KR20090063393A true KR20090063393A (en) 2009-06-18

Family

ID=40992364

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070130732A KR20090063393A (en) 2007-12-14 2007-12-14 Prestressed beam

Country Status (1)

Country Link
KR (1) KR20090063393A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101064731B1 (en) * 2011-03-16 2011-09-14 김선주 Steel-concrete composite girder and constructing method thereof
KR101147539B1 (en) * 2011-12-05 2012-05-21 서진티씨 주식회사 Hybrid girder for bridge
KR20160121112A (en) * 2015-04-10 2016-10-19 힐 중공업 주식회사 Joint Structure of the Steel Beam with Reinforcing Means
KR102188663B1 (en) * 2020-03-24 2020-12-09 주식회사 길교이앤씨 Precast end block, psc girder with the same, bridge with the psc girder and construction method of the psc girder using the same
KR102241713B1 (en) * 2020-07-28 2021-04-20 주식회사 길교이앤씨 Precast end block, concrete girder for rahmen with the same, bridge with the concrete girder for rahmen and construction method of the concrete girder for rahmen using the same
KR102427958B1 (en) * 2021-06-30 2022-08-01 조남철 Cable-reinforced membrane structure resistant to wind loads

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101064731B1 (en) * 2011-03-16 2011-09-14 김선주 Steel-concrete composite girder and constructing method thereof
KR101147539B1 (en) * 2011-12-05 2012-05-21 서진티씨 주식회사 Hybrid girder for bridge
KR20160121112A (en) * 2015-04-10 2016-10-19 힐 중공업 주식회사 Joint Structure of the Steel Beam with Reinforcing Means
KR102188663B1 (en) * 2020-03-24 2020-12-09 주식회사 길교이앤씨 Precast end block, psc girder with the same, bridge with the psc girder and construction method of the psc girder using the same
KR102241713B1 (en) * 2020-07-28 2021-04-20 주식회사 길교이앤씨 Precast end block, concrete girder for rahmen with the same, bridge with the concrete girder for rahmen and construction method of the concrete girder for rahmen using the same
KR102427958B1 (en) * 2021-06-30 2022-08-01 조남철 Cable-reinforced membrane structure resistant to wind loads

Similar Documents

Publication Publication Date Title
KR100888941B1 (en) Concrete-composite crossbeam and construction methods using the same
KR100427405B1 (en) Pssc complex girder
KR20090063393A (en) Prestressed beam
KR101170922B1 (en) The rahmen bridge construction technique for which tendon and the connection support stand was used
KR100761786B1 (en) Concrete-composite Crossbeam
KR20010045640A (en) Precast Reinforced Concrete Slab, Composite Continuous Bridge Having Such Slab, and Constructing Method thereof
JP5184836B2 (en) Construction method of synthetic steel slab girder bridge
JP4888915B2 (en) Building structure using composite structural beams with beam ends made of PC
JP4819605B2 (en) Precast prestressed concrete beams using tendons with different strength at the end and center
JP2008266910A (en) Projection structure of anchorage or deviator of tendon, and construction method therefor
JP2010265623A (en) Reinforcing structure of steel floor slab
KR100950027B1 (en) Composite girder for bridge
KR101098688B1 (en) Reinforced Concrete Frame Structure having High Flexibility in Beam-Column Joint
KR100767145B1 (en) Construction method of prestressed concrete temporary bridge that can be assembled and dismantled using lateral steel wire
JP2020063598A (en) Hinge part reinforcement method and reinforcement structure in hinged girder bridge with pc
KR20040091350A (en) Prestressed steel girder
JP2006299554A (en) Structure near intermediate supporting point of continuous i-beam bridge
KR101585072B1 (en) Performance Improvement and Seismic Reinforcement using Reinforcement Structure of Bridge Structures
KR100759861B1 (en) Reinforced beam structure of Ramen-type metal skeletal structure for parking lot
KR200291793Y1 (en) Pssc complex girder
KR101688440B1 (en) Reinforcement Member for Beam, Beam Equipped with the Reinforcement Member, Construction Structure Using the Beam
KR200268159Y1 (en) Device for anchoring outer steel wire for reinforcing concrete structures
JP4293696B2 (en) Construction method of composite floor slab bridge
KR20130090455A (en) Construction method for continuous bridge using confined concrete
KR200405937Y1 (en) Reinforced beam structure for Ramen-type metal skeletal structure

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E601 Decision to refuse application