KR101591808B1 - the deep composite precast beam, the connection structure between composite precast column and the deep composite precast beam - Google Patents

Abstract

The present invention comprises two lower end steel frames (110) installed on both ends; Retaining steel frame 140 installed at a lower portion of the suspension; A beam concrete 150 (hereinafter, referred to as " 150 ") in which a portion of the webs of the two lower end steel frames 110 and the entire suspended steel frame 140 are buried and slabs 155 are formed on the side surfaces, ); A plurality of compensator reinforcement rods (120) laid on top of the two lower end steel rods (110) and having ends longer than the ends of the lower end steel rods (110); And a plurality of beams reinforced concrete beams 130 embedded in a lower end of the beam concrete 150 and exposed at ends of the beam concrete 150. The beam reinforced concrete 150 is installed at a lower end 110) and the bottom steel frame (110) and the bottom steel frame (140) are used,
The plurality of compensating part reinforcing bars 120 are fixed to the inside of the beam concrete 150 together with a part of the plurality of beam supporting bars 130 by the upper stirrer 160 and the beam concrete 150) is provided with a lower stirrer (170) for fixing the beam lower reinforcing bar (130).
The lower end steel frame 110 of the synthetic PC beam 100 is formed by using the composite PC beam 100 having a high level of vibration and by using the beam connection plate 290, The lower synthetic PC column 200 is connected to a column bracket 220 attached to the upper portion 210 of the lower panel 200. The upper and lower synthetic PC columns 200 are horizontally disposed with two column plates 260, And the lower synthetic PC column 200 is formed as an upper synthetic PC column 200 'provided on the lower synthetic PC column 200 Wherein the column steel frame 210 of the lower synthetic PC column 200 and the column steel frame 210 of the upper synthetic PC column 200 are connected to the column connecting plate 230. [ It provides a connection structure between synthetic PC beams and synthetic PC columns.

Description

A composite PC beam and a connection structure between the composite PC column and the synthetic PC column,

The present invention relates to a composite PC beam (girder) which is used in a large-scale structure such as an apartment type factory where high durability is high, which can reduce the use of reinforcing bars and steel frames to increase the economical efficiency, And to a connection structure between the two.

Large structures such as apartment type factories, which have high booth densities in the past, are often constructed with steel frame or prestressed beam. In the case of reinforced concrete structure, it has been pointed out that it is difficult to design because of increased height and span, and the requirement of reinforcing steel is increased.

Therefore, it is urgent to develop a method of improving the structure of synthetic PC beam (girder) and reducing the usage of steel frame and reinforcing steel by using advantages of synthetic PC beam (girder).

Therefore, the inventor of the present invention improved the structure of the synthetic PC beam (girder) to improve the advantages of the synthetic PC beam (girder) and to reduce the amount of steel and reinforcing steel used, Link structure.

[Patent Document 1] Korean Patent Publication No. 10-2010-0046685 'Joining structure of H-shaped beam and rectangular steel pipe column', May 07, 2010 [Patent Document 2] Korean Patent Laid-Open No. 10-2011-0023989 'Connection medium of beam and column of a laminated prefabricated building and method of constructing the prefabricated building using the same', March 09, 2011

SUMMARY OF THE INVENTION The present invention has been made in order to overcome the above-mentioned conventional problems, and it is an object of the present invention to provide a composite PC beam (girder) And the like.

In order to solve the above-mentioned technical problems, the present invention is characterized by comprising two lower end steel frames (110) installed on upper portions of both ends; Retaining steel frame 140 installed at a lower portion of the suspension; A beam concrete 150 (hereinafter, referred to as " 150 ") in which a portion of the webs of the two lower end steel frames 110 and the entire suspended steel frame 140 are buried and slabs 155 are formed on the side surfaces, ); A plurality of compensator reinforcement rods (120) laid on top of the two lower end steel rods (110) and having ends longer than the ends of the lower end steel rods (110); And a plurality of beams reinforced concrete beams 130 embedded in a lower end of the beam concrete 150 and exposed at ends of the beam concrete 150. The beam reinforced concrete 150 is installed on the lower steel frame (100), wherein the amount of use of the lower end steel frame (110) and the lower end stop steel frame (140) used to be pushed up to the upper part of the lower end steel frame (110)

The plurality of compensating part reinforcing bars 120 are fixed to the inside of the beam concrete 150 together with a part of the plurality of beam supporting bars 130 by the upper stirrer 160 and the beam concrete 150) is provided with a lower stub (170) for fixing the beam lower reinforcing bar (130).

In addition, the lower end steel frame 110 of the synthetic PC beam (girder) 100 is formed by using a synthetic PC beam (girder) The lower synthetic PC column 200 is connected to the column bracket 220 attached to the column steel frame 210 of the lower composite PC column 200. The lower synthetic PC column 200 is provided with two column plates 260 horizontally on the upper and lower sides, The upper synthetic PC column 200 is installed on the lower synthetic PC column 200. The upper synthetic PC column 200 includes the column steel frame 210 vertically installed at the center of each plate 260, The column steel frame 210 of the lower synthetic PC column 200 and the column steel frame 210 of the upper synthetic PC column 200 are connected to the column connecting plate 230 It provides a connection structure between a high-quality synthetic PC beam (girder) and a synthetic PC column.

The present invention provides a connection structure with a high-stiffness synthetic PC beam (girder) and a synthetic PC column that can be effectively applied to a building having a reduced height and reduced use of reinforcing bars and steel frames.

The high synthetic PC beam (girder) of the present invention has an advantage that it can be used in connection with the SRC column or the synthetic PC column registered by the present inventor. The present invention effectively utilized the advantages of the steel material and the concrete material which occupy most of the building material. Especially, it is possible to reduce the volume of the upper and lower reinforcing bars (or prestresses) at the upper and lower sections by connecting the reinforced steel beams installed on the beam side to the steel columns of the composite PC column joints. We also proposed a method to limit the deflection of the composite PC beam (girder) using camber so that the deflection limit on the design standard can be observed. This composite PC beam (girder) was designed to install long-span PC slabs and beams, thus enhancing the structural efficiency.

The composite PC beam (girder) is designed to be joined to the small beam by a pin joint so as not to receive the torsional moment in the small beam. The plate for pin joining, which does not receive moment in the side small beam, is placed on the neutral axis of the small beam. The neutral axis means a place where no force acts because the tensile force acting on the lower part and the compressive force acting on the upper part are canceled.

In addition, reinforced bars of composite PC columns are connected to column plates by nuts or welds, so that axial force, tensile force in case of lateral force, and compressive force are designed to be transmitted to column joints. In addition, through the use of such a device, the joining of the joining parts becomes smooth, so that the joining of the joining parts to the joining parts can be smoothly performed. By this method, the existing wet construction environment is changed into the dry prefabricated construction environment, so that it is possible to shorten the air, reduce the construction cost, and reduce the waste material.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front view and a perspective view of a high-stiffness synthetic PC beam (girder) of the present invention.
FIG. 2 shows a state in which slab concrete is laid in FIG. 1; FIG.
3 is a cross-sectional view of AA 'and BB' in FIG.
FIG. 4 is a view showing a state of the upper synthetic PC column 200 'and the lower synthetic PC column used in the present invention.
Figures 5 to 8 illustrate various embodiments of Figure 4.
Figs. 9 to 13 show the construction method of the connection structure of the synthetic PC column with the high-stiffness synthetic PC beam (girder) of the present invention in order.
Fig. 14 shows the completed state of the connection structure between the high-stiffness synthetic PC beam (girder) of the present invention and the synthetic PC column.
15 is a sectional view of CC 'in Fig.
Figure 16 is a perspective view of another embodiment of a high stiffness synthetic PC beam (girder) of the present invention.
17 is a perspective view of a small beam used in the present invention.
Fig. 18 shows a state in which the small beam shown in Fig. 17 is coupled to a high-synthetic PC beam (girder) having a high vibration shown in Fig.
Figs. 19 and 20 are enlarged views of dotted lines in Fig.
Fig. 21 shows an arch-shaped stopping frame steel used in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1. High-quality composite PC beam (girder)

FIG. 1 is a front view and a perspective view of a high-stiffness composite PC girder according to the present invention, FIG. 2 shows a state in which slab concrete is laid in FIG. 1, and FIG. Fig. 3 (a) is a cross-sectional view of AA 'in FIG. 2, and FIG. 3 (b) is a cross-sectional view of BB` in FIG.

The high-stiffness synthetic PC beam (girder) 100 of the present invention includes two lower end steel frames 110 installed on upper portions of both ends as shown in Figs. 1 to 3; Retaining steel frame 140 installed at a lower portion of the suspension; A beam concrete 150 (hereinafter, referred to as " 150 ") in which a portion of the webs of the two lower end steel frames 110 and the entire suspended steel frame 140 are buried and slabs 155 are formed on the side surfaces, ); A plurality of compensator reinforcement rods (120) laid on top of the two lower end steel rods (110) and having ends longer than the ends of the lower end steel rods (110); And a plurality of beam reinforcing bars (130) embedded in the lower end of the beam concrete (150) and having ends exposed to the ends of the beam concrete (150)

The beam concrete 150 is used to reduce the amount of the lower steel frame 110 and the lower steel frame 140 that are used to be lowered below the lower steel frame 110.
At this time, the lower end steel frame 110 and the lower stop steel frame 140 are installed only at the minimum portion where tensile force is applied, and the gap G, in which the steel frame is not laid, is formed at the portion where the tensile force and moment are small, The bottom end steel frame 110 and the bottom stopping steel frame 140 are not connected to each other and the clearance G is formed so that the amount of steel frame to be used can be remarkably reduced.

3, the plurality of compensating part reinforcing bars 120 are fixed to the upper concrete block 150 together with part of the plurality of beam reinforcing bars 130 in the concrete 150, as shown in FIG. 3 ,

A lower stirrer 170 for fixing the beam lower reinforcing bar 130 is installed in the beam concrete 150 below the slab 155.

The cross-sectional shape of the bottom end steel frame 110 and the bottom stopping steel frame 140 may be any shape.

However, as shown in FIG. 3, it is preferable that the bottom end steel frame 110 has a T-shaped cross section and the end stop steel frame 140 has an inverted T-shaped cross section.

A plurality of stud bolts are attached to the webs of the lower end steel frame 110 and the lower stop steel frame 140 to increase the binding force of the stud bolts with the beam concrete 150.

The slab chin 155 may be formed as described above and the slab chin 155 may be omitted according to site conditions and the beam concrete 150 And a slab is installed at the upper end of the slab.

17 is a perspective view of a small beam used in the present invention, and Fig. 18 is a perspective view of a high-synthetic PC beam (girder) according to the present invention. Fig. 17B shows a state in which the small beam shown in FIG. 17 is engaged. 19 and 20 are enlarged views of dotted lines in Fig.

16-20, another embodiment of a high-stiffness synthetic PC beam of the present invention is a small beam connecting embossed structure (not shown) so that a small beam 300 can be coupled to the neutral axis of the beam concrete 150. [ And the plate 145 is provided on the side surface.

The composite PC beam (girder) is designed to be joined to the small beam by a pin joint so as not to receive the torsional moment in the small beam. The plate for pin joining, which does not receive moment in the side small beam, is placed on the neutral axis of the small beam. The neutral axis means a place where no force acts because the tensile force acting on the lower part and the compressive force acting on the upper part are canceled.

A chamber 158 in which the beam concrete 150 is not poured is formed at the center of the beam concrete 150 such that the center of the small beam connecting embedding plate 145 and the center of the beam stopping steel frame 140 are exposed ,

The slab concrete may be poured into the chamber 158 when the slab concrete is poured.

The small beam 300 may be embodied in the example shown in FIG. 17, but it may be implemented regardless of the shape of a conventional steel beam as long as it has an end that can be coupled to the small beam connecting embedding plate 145.

Fig. 21 shows an arch-shaped stopping frame steel used in the present invention.

As shown in FIG. 21, the suspended steel frames of the reinforced concrete PC beam (girder) 100 of the present invention or the suspended beams of the small beams 300 are formed in an arch shape And the deflection is reduced against the upper load. The arch-shaped stopping steel frame is referred to as a camber.

2. Connection structure between composite PC beam (girder) and synthetic PC column with high durability

FIG. 4 is a view showing a state of the upper synthetic PC column 200 'and the lower synthetic PC column used in the present invention.

Figs. 9 to 13 show the construction method of the connection structure of the synthetic PC column with the high-stiffness synthetic PC beam according to the present invention in order, and Fig. 14 shows the construction method of the high- ) And a synthetic PC column, and FIG. 15 is a cross-sectional view of CC 'in FIG.

The connection structure between the high-stiffness synthetic PC beam (girder) and the synthetic PC column according to the present invention uses the synthetic PC beam 100 having a high level of vibration,

The lower end steel frame 110 of the synthetic PC beam 100 is fixed to the column bracket 220 attached to the column steel frame 210 of the lower synthetic PC column 200 using the beam connecting plate 290 Connected,

The lower synthetic PC column 200 includes the column steel frame 210 having two column plates 260 installed horizontally at upper and lower portions and vertically installed at the center of each of the two column plates 260 Respectively,

Another lower synthetic PC column 200 is an upper synthetic PC column 200 'installed on the lower synthetic PC column 200,

The column steel frame 210 of the lower synthetic PC column 200 and the column steel frame 210 of the upper synthetic PC column 200 are connected to the column connecting plate 230.

The columnar reinforcing bars 240 exposed at the upper portion of the column plate 260 of the lower synthetic PC column 200 and the column reinforcing bars 240 exposed at the lower portion of the column plate 260 of the upper synthetic PC column 200 ' 240 may be connected to the coupler 250.

The connection structure of the high-synthetic PC beam (girder) of the present invention and the synthetic PC column is such that two lower synthetic PC columns 200 are vertically installed at a length of the synthetic PC beam 100 And,

As shown in FIG. 9, the synthetic PC beam (girder) 100 is pivotally mounted, and the steel supporting frame 110 is connected to the column bracket 220 by using the beam connecting plate 290,

As shown in FIG. 10, the upper synthetic PC column 200 'is pored so that the column steel frame 210 installed on the column plate 260 under the upper synthetic PC column 200' and the lower synthetic PC column 200 ' After the column steel frame 210 installed on the column plate 260 on the upper side of the column connecting plate 200 is connected to the column connecting plate 230,

And slab concrete SC is installed as shown in FIG.

Before the slab concrete (SC) is laid, as shown in FIG. 12, the column reinforcing bar 240 exposed above the column plate 260 of the lower synthetic PC column 200 and the column plate 240 of the upper synthetic PC column 200 ' A step of connecting the pillar reinforcement 240 exposed downward to the coupler 250 may be added.

FIG. 4 illustrates a combined state of the upper synthetic PC column 200 'and the lower synthetic PC column used in the present invention, and FIGS. 5 to 8 illustrate various embodiments of FIG.

The pillar reinforcement 240 located above and below the pillar bracket 220 of the pillar reinforcement 240 of the lower synthetic PC column 200 and the upper synthetic PC column 200 '

5 or the nut N shown in Fig. 6 or the horizontally bent bent portion shown in Fig. 7 is attached to the column plate 260 by the welding machine W The upper portion of the columnar reinforcement 240 is folded and joined to the lower reinforcing bar 130 of the girder 100. The head of the columnar reinforcement 240 may be an enlarged head like a stud bolt as shown in FIG.

6, a nut is further provided under the column plate 260 so that the column bar 240 passing through the column plate 260 is fixed to the upper and lower portions of the column plate 260 with a nut .

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 invention.

It is therefore intended that the appended claims cover such modifications and variations as fall within the true scope of the invention.

G: Clearance
100: Highly compounded PC beam (girder)
110: lower steel frame
120: Reinforced section reinforcement
130: Beam bottom reinforcement
140:
145: Small beam connection embeddable plate
150: Beam concrete
155: Slab chin
158: chamber
160: Top Stroke
170: Lower Stroke
200: Lower synthetic PC column
200`: upper synthetic PC column
210: Column steel frame
220: Column bracket
230: Column connecting plate
240: columnar bar
250: Coupler
290: beam connection plate
300: Small Bo

Claims (7)

Two lower end steel frames 110 installed on both ends;
Retaining steel frame 140 installed at a lower portion of the suspension;
A beam concrete 150 (hereinafter, referred to as " 150 ") in which a portion of the webs of the two lower end steel frames 110 and the entire suspended steel frame 140 are buried and slabs 155 are formed on the side surfaces, );
A plurality of compensator reinforcement rods (120) laid on top of the two lower end steel rods (110) and having ends longer than the ends of the lower end steel rods (110);
And a plurality of beam reinforcing bars (130) embedded in the lower end of the beam concrete (150) and having ends exposed to the ends of the beam concrete (150)
The beam concrete 150 is used by being pushed up to the upper portion of the lower end steel frame 110,
The bottom end steel frame 110 and the bottom stopping steel frame 140 are not connected to each other but form a gap G,
And the amount of use of the lower end steel frame (110) and the lower stop steel frame (140) is reduced.
The method of claim 1,
The plurality of compensating part reinforcing bars 120 are fixed in the concrete 150 with the upper stirrer 160 together with a part of the plurality of beam reinforcing bars 130,
Wherein a lower struc- ture (170) for securing the beam lower reinforcing bar (130) is installed in a beam concrete (150) below the slab chin (155).
3. The method according to claim 1 or 2,
The bottom end steel frame 110 has a T-shaped section and the bottom stopped steel frame 140 has an inverted T-
Wherein a plurality of stud bolts are attached to the webs of the lower end steel frame 110 and the lower stop steel frame 140 to increase the binding force of the stud bolts with the beam concrete 150 100).
The method of claim 1,
Wherein the slab chin (155) is omitted and a slab is installed at the upper end of the beam concrete (150).
A composite PC beam (girder) 100 having a high vibration level as set forth in claim 1 or 2 is used.
The lower end steel frame 110 of the synthetic PC beam 100 is fixed to the column bracket 220 attached to the column steel frame 210 of the lower synthetic PC column 200 using the beam connecting plate 290 Connected,
The lower synthetic PC column 200 includes the column steel frame 210 having two column plates 260 installed horizontally at upper and lower portions and vertically installed at the center of each of the two column plates 260 Respectively,
Another lower synthetic PC column 200 is an upper synthetic PC column 200 'installed on the lower synthetic PC column 200,
Wherein the column steel frame 210 of the lower synthetic PC column 200 and the column steel frame 210 of the upper synthetic PC column 200 are connected to the column connecting plate 230. [ Girder) and synthetic PC column.
The present invention uses a high-stiffness synthetic PC girder 100 according to the third aspect of the present invention,
The lower end steel frame 110 of the synthetic PC beam 100 is fixed to the column bracket 220 attached to the column steel frame 210 of the lower synthetic PC column 200 using the beam connecting plate 290 Connected,
The lower synthetic PC column 200 includes the column steel frame 210 having two column plates 260 installed horizontally at upper and lower portions and vertically installed at the center of each of the two column plates 260 Respectively,
Another lower synthetic PC column 200 is an upper synthetic PC column 200 'installed on the lower synthetic PC column 200,
Wherein the column steel frame 210 of the lower synthetic PC column 200 and the column steel frame 210 of the upper synthetic PC column 200 are connected to the column connecting plate 230. [ Girder) and synthetic PC column.
The method of claim 1,
Wherein the retaining steel frame (140) is formed in an arch shape to reduce deflection against an upper load.

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