KR101650431B1 - Precast wide composite girder with built up steel beam and prestressed concrete - Google Patents

Precast wide composite girder with built up steel beam and prestressed concrete Download PDF

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Publication number
KR101650431B1
KR101650431B1 KR1020150169719A KR20150169719A KR101650431B1 KR 101650431 B1 KR101650431 B1 KR 101650431B1 KR 1020150169719 A KR1020150169719 A KR 1020150169719A KR 20150169719 A KR20150169719 A KR 20150169719A KR 101650431 B1 KR101650431 B1 KR 101650431B1
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South Korea
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steel
plate
wide
concrete
wide composite
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KR1020150169719A
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Korean (ko)
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김상모
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주식회사 반석티브이에스
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/29—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures
    • E04C3/293—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces built-up from parts of different material, i.e. composite structures the materials being steel and concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/30—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts being composed of two or more materials; Composite steel and concrete constructions
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/38—Connections for building structures in general
    • E04B1/58—Connections for building structures in general of bar-shaped building elements

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Rod-Shaped Construction Members (AREA)

Abstract

The present invention relates to a wide composite beam that combines a factory-made prestressed concrete with a steel material and includes a precast concrete plate having a width greater than the width of the column and having a prestressed strand into which a prestress is introduced, A pre-cast beam into which a prestress is introduced is formed into a wide composite beam having a wide width, and a shape steel beam made of a thin steel plate is formed integrally in place of a conventional steel member, It is economical and easy to construct the structure by functioning as a mold together with the function of a conventional steel member. Since the cast concrete can be installed using the precast concrete plate and the shape steel beam, the mold can be omitted, Kangbo And by minimizing the beam steel discretion as in the conventional steel beams can reduce the iron volume.

Description

{PRECAST WIDE COMPOSITE GIRDER WITH BUILT UP STEEL BEAM AND PRESTRESSED CONCRETE Combining Prestressed Concrete with Steels}

The present invention relates to a wide composite beam combining a factory-made prestressed concrete and a steel material. More particularly, the present invention relates to a wide composite beam which is made of prestressed concrete, It can be used as a wide composite beam furnace which is made by factory. It can be used as a thin steel plate instead of conventional steel frame while owing to the advantage of omitting formwork, reducing material cost, shortening air, The present invention relates to a wide composite beam that combines a prestressed concrete with a factory-made prestressing material and a steel material to improve the economical efficiency by reducing the steel billet.

Generally, a ramen structure is a structural type in which a node of a frame is connected, and generally refers to a frame in which a column and a girder (or beam) are joined together and formed continuously.

This is one of the bases of the modern architectural structure type, and it has an important main structure especially in high - rise buildings such as steel - reinforced concrete structure. Each member is subjected to axial force, shear force, and bending moment, and all external forces are transmitted from the foundation to the ground through girders and columns.

However, since most of the reinforced concrete raymen structures need to be assembled directly in the field, there is a problem that the construction period is increased, and the labor cost is increased due to the increase in the proportion required for the formwork.

In particular, in the case of large-scale warehouses with large floors and large spans, it is difficult to construct the slab formwork in general, so that the system formwork is introduced. As a result of the system formwork used in such a structure, the labor cost is further increased and the system formwork There is a problem in that the cost of the construction material increases.

In order to solve the problems of the conventional reinforced concrete raymen structure, attempts have been made to reduce the construction period by introducing a steel structure using a steel beam and a steel plate. However, there is a problem that the cost of materials is increased due to the use of the expensive steel material, and since the joining between the members is performed by the pin joining, in the case of the structure in which the dynamic load acts largely, There is a problem that a large number of cracks occur in the portion.

In addition, a precast concrete structure is introduced to solve the problems of the conventional reinforced concrete raymen structures, but there is a possibility that the manufacturing at the factory affects the construction period because each member must be manufactured in advance at the factory In addition, in the construction of a structure having a high bedding height and a large span as described above, the cost of transportation is increased as each member is enlarged, and due to the heavy weight of the lifting installation, There is a problem that it is difficult to fasten each member.

In order to solve such a problem, the inventor of the present invention has proposed a prestressed steel composite structure having a steel composite beam in Korean Patent No. 10-1536659 (entitled "Prestress steel composite structure").

In the above-mentioned prior art, there are provided a steel frame composite beam including a pair of steel beams spaced apart from each other at regular intervals on both sides of the column and introducing a prestress, a steel beam connected to the steel beam and arranged to be perpendicular to the steel frame, A steel composite structure including a steel composite slab formed on the upper portion of the beam is proposed. The steel frame composite of the prior art includes a pair of steel beams spaced at a predetermined distance from the column, a composite beam deck plate fixed to a lower flange of the pair of steel beams, And a prestressed strand installed on the synthetic-view reinforced concrete layer to form a steel beam and a steel slab constituted by a steel beam and a deck plate in the form of a ramen structure, And are formed so as to have all the advantages of the ramen structure formed continuously at the contact point.

However, in the above-described prior art steel composite structure, it is necessary not only to use a pair of steel beams and deck plates such as H-beam or I-beam, but also to install the deck plate in a steel beam, The amount of steel used in the steel composite structure is increased, so that the total construction cost is increased. In addition, a deck plate is installed on the lower flange of the H-shaped steel after the steel frame is assembled in the site, .

Korean Patent No. 10-1536659 (entitled " Prestress steel composite structure ")

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems of the prior art, and it is an object of the present invention to provide a factory-made prestressing machine which can reduce the amount of steel used and can shorten the air, And a wide composite beam that combines concrete and steel.

Another object of the present invention is to provide a pre-cast beam in which a pre-cast beam is formed into a wide composite beam having a wide width, and a shape steel bar made of a thin steel plate is integrally formed instead of a conventional steel member, The present invention provides a wide composite beam that combines prestressed concrete and steel that is economical and easy to construct and that is constructed to function as a mold together with a function of a steel member of a steel structure.

In order to accomplish the above object, the present invention provides a precast concrete plate having a prestressed strand having a wider width than a width of a wide synthetic pillar combined with a factory-made prestressed concrete according to the present invention and introduced with a prestress, And a shaped steel bar made of a thin steel plate integrally provided on both upper and lower sides of the plate.

Here, the steel bars made of the thin steel plate are formed by bending or welding the thin steel plate in a T shape or a shape or a Z shape, and are installed upright near both ends in the width direction of the precast concrete plate .

The width of the wide composite beam is determined by the thickness of the lightweight body embedded in the spotted concrete portion to reduce the weight of the wide composite beam at a central portion having a small acting shear force, .

In the present invention, the shape-filled concrete portion and the plurality of shear keys embedded in the slab are protruded from the shape beam.

Here, the wide composite view is characterized by having a truss wire line girder replacing the shape steel beam and including a top current, a lattice material, and a bottom current.

Here, the prestressed strand is prefabricated in a factory, and the wide composite is manufactured in advance in a factory.

According to the wide composite beam combining the factory-made prestressed concrete of the present invention and the steel material of the present invention having the above-described construction, the precast beam into which the prestress is introduced is formed into a wide composite beam having a wide width and a thin steel plate And the thin steel plate is configured to function as a mold together with the function of a conventional steel member, so that it is economical and easy to install.

In addition, since the wide composite can be provided in the U-shaped section formed by the lower precast concrete plate and the thin steel plates on both sides, the cast-in-place can be omitted and the shape can be omitted, The construction of the beam minimizes the amount of steel material as in the case of conventional steel beams, thereby reducing the amount of steel products.

In addition, since the cross section of the small steel beam whose span is reduced due to the wide composite beam is reduced, the material cost can be further reduced, and even in the case of a structure having a large height and a large span, such as a distribution center, It can shorten the air and it is easy to carry and install.

In addition, a wide composite beam composed of a steel plate and a precast concrete plate formed of a thin steel plate and a steel slab are formed in the form of a ramen structure, thereby providing the advantages of a steel structure and a reinforced concrete ramen structure in which each member is continuously formed at a contact You can have all the advantages.

1 is a cross-sectional view schematically showing a wide composite beam combining a factory-made prestressed concrete according to the present invention and a steel material.
2 is a plan view of Fig.
3 is a side view of Fig.
FIG. 4 is a plan view of the case where the column is a reinforced concrete member in FIG. 1;
FIG. 5 is a view showing another wide view of the wide composite beam according to the present invention, in which, in the case of a small scale structure, a shape of a steel beam produced by a thin steel plate is replaced by a truss wire line girder.

Hereinafter, with reference to the accompanying drawings, a wide composite beam combining a factory-made prestressed concrete with a steel material will be described in detail as an embodiment.

In this embodiment, the steel composite structure in which the wide composite beams are installed is applied to structures such as a distribution center having a height of 10 m or more between columns and a high floor height. However, the present invention is not limited thereto. The present invention can also be applied to a general structure of FIG.

As shown in FIGS. 1 to 4, a steel structure having a wide composite beam 1 in which a factory-made prestressed concrete according to the present invention is combined with a steel material has a column 2, a wide composite beam, And a slab 3. The slab 3 includes a slab 3,

The columns 2 are spaced apart from each other by a predetermined distance, and the distance between the columns is about 10 m.

The wide composite beam 1 is installed as a wide girder having a wide width around the column 2. [ The wide composite view is formed as a wide girder with the column as the center and a one way girder. In the present embodiment, the wide composite beam is formed of a one-directional girder that transmits a force in one direction in the structure. However, all the girders connecting the wide composite beam to the column and the column may be formed as the wide composite beam. Of course.

The wide composite beam 1 includes a pre-cast concrete plate 10 and a steel beam 20 made of a thin steel plate.

The precast concrete plate 10 is formed to have a wider width than the column 2 and is manufactured in advance in the factory.

The precast concrete plate 10 is constructed such that the longitudinally extending roots 12 of the beam are disposed above the transverse roots 11 of the beam and spaced apart from the longitudinal roots 12 by a predetermined distance, (13).

The prestressed concrete plate is integrally formed with the concrete layer placed on the precast concrete plate so that a prestressing force is introduced into the precast concrete plate 10 in a pre-tensioned manner, And is configured to function. In addition, the prestressing material is configured to introduce prestressing in advance at the factory.

The shape beam 20 is formed by bending a thin steel plate such as a coil steel plate into a T shape or a shape of a letter or Z shape and a bent portion at the lower side of the steel plate 20 in the lateral direction of the precast concrete plate 10 The directional roots 11 are welded to the lower portion of the shape steel beam 20 to be joined.

Both longitudinal end portions of the shaped beam 20 are configured to be exposed without being buried in the precast concrete plate 10 and fixed to the steel beam 4 by bolt assembly or welding .

1, the shape beam 20 has a head portion 20a, a central body portion 20b, and a lower bent portion 20c. However, the head portion 20a and the center Shaped body having a body portion 20b of the body portion 20b or a L-shaped body having a central body portion 20b and a lower bent portion 20c.

Further, a plurality of shear keys 21 projecting inward are provided in the shape beam 20. The shear key 21 is embedded in a site-dumped concrete portion to be described later and the slab so that the shape steel beam 20 having only a thin thickness and the shear key are integrally formed and the shape beam 20 is deformed by buckling And to function as a shear connection member with the on-site poured concrete part.

The thin steel plate is bent into a T shape or a [Z-shape] so as to form the steel beam 20, and the steel beam 20 is placed in the vicinity of both ends in the width direction of the precast concrete plate 10 And fastened to the transverse muscle 11 and / or the longitudinal muscle 12. Thereafter, concrete is poured into the precast concrete plate 10 at a predetermined height so that the lower part of the shaped steel beam 20 is embedded, and the precast concrete plate 10 and the shaped steel beam 20 are integrally formed So as to form the wide composite beam.

As described above, after the wide composite beam integrally manufactured at the factory is loaded on the site, the wide composite beam is mounted on the foundation plate 5 or the bracket of the column and the precast concrete plate 10, Install the concrete part.

The space formed by the shape beam 20 and the precast concrete plate 10 is provided with a poured concrete 30. The upper surface of the precast concrete plate 10 may be formed to have a rough surface without being subjected to a finishing process at the time of factory production of the precast concrete plate 10, The adhesion force with the poured concrete portion 30 can be increased.

Since the pair of the steel beam beams 20 and the precast concrete plate 10 can function as the formwork of the spotted concrete part, the formwork is not required and the structure such as the distribution center having a high bed height and a large span The installation and construction of the wide composite beam can be easily accomplished without the need to install a costly system formwork.

In order to reduce the weight of the wide composite beam 1, the lightweight body 40 may be embedded in the center of the span of the beam having a small shear force acting in the inside of the spotted concrete portion 30. The upper surface of the spotted concrete portion 30 is configured to have a height coinciding with a lower surface of a steel composite slab described later.

Thus, unlike a conventional steel structure in which only a steel beam having a width substantially equal to the width of a column provided in a structure is provided, the wide composite girder according to the present invention is constructed of a wide girder having a width larger than the width of the column, It can be formed with a reinforced concrete ramen structure using a prestress.

In addition, since the wide composite beams having a wide width can function as unidirectional RC beams, not only the load-carrying performance is improved but also a high level of stratification such as a distribution center or the like is introduced by introducing a prestress into the wide composite beam, Even for large structures, it can function as a wide composite beam that is strong against vibration and excellent in load-bearing performance.

Meanwhile, as shown in FIGS. 1 to 4, a steel beam 4 is installed in the wide composite beam in a small beam shape connected to the steel beam and arranged to be perpendicular to the wide composite beam.

The steel beam 4 is bolted by a connecting plate and is fixed to a side portion of the wide-width composite beam.

The length of the steel beam 4 is formed to be a length obtained by subtracting the width of the wide composite beam from the ground by the formation of the wide composite beam. For example, if the width of the wide composite beam is assumed to be 10 m and the width of the wide composite beam is 3 m, the length of the steel beam is formed to be 7 m. Accordingly, the bending moment (proportional to the square of the length) .

Therefore, since the length and the dancing of the steel beam can be made small, the material cost can be reduced as compared with the conventional steel structure, and the self weight can be reduced, so that the installation and construction can be facilitated when the steel beam is lifted by a tower crane or the like .

A slab (3) is installed on the steel beam. The slab reinforcement 3a may be disposed on the slab 3 and the concrete layer of the slab may be integrally formed by integrally casting the concrete when the field-pierced concrete portion of the wide composite beam is formed.

As a result, the wide composite beam, the steel beam, and the slab are formed using a steel frame structure and a prestressed reinforced concrete (RC) laminated structure, so that the advantages of the steel composite structure and the advantages of the reinforced concrete ramen structure in which each member is continuously formed at the contact point Lt; / RTI >

5 is a view showing another embodiment of the present invention.

The present embodiment is a diagram showing that, for example, in the case of a structure in which a slab is formed of a waffle slab 4 ', a shape steel bar girder 20' is used in the case where the structure is a small scale structure.

In the present embodiment, the wide composite view is provided with a truss wire girder 20 'in place of the shape steel beam 20.

The truss wire ladder 20 'includes a top current 20'a and a bottom current 20'b and a lattice material 20'c. The truss wire ladder 20' Is formed integrally with the precast concrete plate 10 by being installed upright on the transverse and / or longitudinal roots of the precast concrete plate 10 at the time of factory production of the precast concrete plate 10,

Accordingly, in the case of a small-scale structure, the amount of steel can be further reduced by forming the truss wire liner 20 'instead of the shape beam 20.

In addition, in the present embodiment, instead of providing a small beam, the laying concrete 30 may be provided with a ribbed slab or a high-deformation-shaped deck plate (not shown) on the outer precast concrete plate 10, it is possible to easily form the precast concrete plate 10 without using a separate molding operation by casting the precast concrete plate 10 in a field.

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. All of which are included in the technical idea of the present invention.

1: Wide Composite
10: Precast concrete plate
20: Form steel beam
20 '; Truss wire girder
30: Placed concrete part
40: Lightweight body

Claims (5)

A precast concrete plate having a width greater than the width of the column and having a prestressed strand into which a prestress is introduced,
And a shaped steel beam made of a thin steel plate integrally provided on both sides of the precast concrete plate,
A steel plate manufactured by a thin steel plate is formed by forming a thin steel plate by T-shape or by bending or welding in a shape of letter or Z-shape, and is installed upright near both ends in the width direction of the precast concrete plate Composite Wide composite beam combining prestressed concrete and steel.
delete The method according to claim 1,
The wide-
A cast-in-place concrete part poured between the form steel beam and the precast concrete plate,
Further comprising a lightweight body embedded in the cast concrete placed so as to reduce the weight of the wide composite beam at a central portion having a small acting shear force.
The method of claim 3,
And a plurality of shear keys embedded in the slab are projected from the slab, and the preformed concrete is combined with the steel.
The method according to claim 1,
Wherein the wide composite beam is replaced by a truss wire girder including a top current, a lattice material and a bottom current in place of the shape steel beam, and a wide composite beam combining a factory-made prestressed concrete and a steel material.
KR1020150169719A 2015-12-01 2015-12-01 Precast wide composite girder with built up steel beam and prestressed concrete KR101650431B1 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109972657A (en) * 2019-03-12 2019-07-05 苏州科技大学 Overall assembled steel reinforced concrete pipe gallery is contained in stake
CN110258800A (en) * 2019-06-05 2019-09-20 南昌大学 A kind of full assembled recoverable function RCS combined joint of band support connection
KR20190120853A (en) 2018-04-17 2019-10-25 염경수 Couple girder

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101536659B1 (en) 2014-06-11 2015-07-14 주식회사 반석티브이에스 Prestressed steel composite structure

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101536659B1 (en) 2014-06-11 2015-07-14 주식회사 반석티브이에스 Prestressed steel composite structure

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190120853A (en) 2018-04-17 2019-10-25 염경수 Couple girder
CN109972657A (en) * 2019-03-12 2019-07-05 苏州科技大学 Overall assembled steel reinforced concrete pipe gallery is contained in stake
CN110258800A (en) * 2019-06-05 2019-09-20 南昌大学 A kind of full assembled recoverable function RCS combined joint of band support connection

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