KR20100018877A - Structure for jointing framework of vertical construction supporting precast concrete girder panel and method thereof - Google Patents

Abstract

The present invention supports the PC girder member to the bracket coupled in the form of wrapping the steel pillar member in a hanging manner, so that the general PC girder member is exposed only to the fixing bars at both ends without embedding the connecting member made of steel in the PC girder member in advance. In case of using, it can be applied in the optimal state, and it is more economical and constructable than steel frame or concrete beam-type structure in which steel frame is embedded, and secures 2 ~ 4 anchor bolts at the bottom of bracket The frame can partially resist the lateral force, and by installing the ribbed steel plate bracket at the joint of the steel column and the beam, concrete is added to the column and the slab joint to integrate the frame and secure the continuity of anchors, brackets, and rebars. As the stiffness and ductility of lateral and compressive forces are increased, And it is to provide a frame connection structure and method of the structurally stable and economical structure by increasing the resistance strength of the pillar.

Description

Structure for Jointing Framework of Vertical Construction supporting Precast Concrete Girder Panel and method

The present invention relates to a connection structure of a vertical frame part of a building and a PC girder member and a construction method thereof, and in particular, only fixing bars are exposed at both ends of a PC girder member without embedding a connecting member made of steel in advance. Even when the PC girder member is used as it is, the present invention can be applied in an optimal state, and it is related to the frame connection structure and method of the structurally stable structure that is more economical, constructable, and structurally stable than the steel or steel beam-filled concrete beam type structure. .

In general, in the construction of an underground building step of constructing a retaining wall; Perforating the ground at the pole position of the building and installing the steel pillar member made of H pile; Digging the ground by the height of the first basement level; Installing a ground level 1 layer parameter parameter beam on top of the retaining wall; Connecting the upper end of the steel column member of the edge adjacent to the retaining wall and the ground 1-layer RF parameter beam to the PC girder member; Connecting the steel column members to a PC girder member; Continuing excavating the ground and repeating the above steps for each basement floor to install the PC girder member and the BC beam member to the bottom of the basement floor; Placing foundation concrete at the bottom of the basement floor; Installing a formwork for pillars around the steel pillar member while moving up from the basement floor, installing slab formwork between the PC girder member and the PC beam member, and reinforcing the column reinforcing bars and the slab reinforcing bars; As it rises up from the basement floor, it proceeds to curing by pouring concrete into pillar formwork and slab formwork.

In the conventional underground building construction method, when connecting the Al parameter parameter beam and the steel column member to the PC girder member or the steel column members to the PC girder member in the conventional underground construction method, a part of the connection member made of steel is exposed to the PC girder member. The PC girder member buried so as to be connected to the flange of the H pile constituting the steel pillar member can be directly connected by welding the connecting member embedded in the PC girder member, but the PC connected to the web of the H pile constituting the steel pillar member The girder member welds the fastening pieces made of steel plate to both sides of the web of the H pile constituting the steel pillar member and the fastening pieces welded to the web of the steel constituting the connecting member of the PC girder member and the steel pillar member with the fastening bolts and nuts. Tighten and connect.

Such conventional underground building construction methods include a SYSS method, a Strut as Permanent System (SPS) method, and a Modularized Hybrid System (MHS) method.

However, in such a conventional method, a part of a steel girder member is to be buried so as to expose a portion of the steel girders to the members at the step of manufacturing the PC girder member and the PC beam member, and thus the PC girder member or the PC beam exposed only to the fixing bars at both ends thereof. In the case of using the member, it is not applicable, and in this case, productivity is lowered because a deformation due to steel exposure is given to a mold for producing a conventional product.

In addition, welding the fastening piece made of steel plate to the web of the steel column member and drilling the fastening hole in the web of steel frame constituting the fastening piece and the connection member embedded in the PC girder member, and fastening with the fastening bolt and nut, It contains disadvantages.

Therefore, an object of the present invention is to support the PC girder member on the bracket coupled to form the steel pillar member in such a manner that the fixing member is exposed at both ends without pre-embedding the steel connecting member to the PC girder member in advance. It is to provide a connection structure and method of the steel pillar column member and the PC girder member of the building that can be applied in an optimal state even when using the PC girder member.

Another object of the present invention is to support the PC girder member to the bracket that is coupled in a form that surrounds the steel pillar member, and by fixing the PC girder member with an anchor bolt at the bottom of the bracket, the frame can resist some of the lateral force, The installation of ribbed steel brackets at the joints of the steel columns and beams improves the performance of the joints and increases the rigidity of the joints to help improve the strength of the beam members and columns, thereby forming an economical and stable structural system. It is to provide a frame connection structure and method of structurally stable structure with more economical and constructability than concrete beam type structure.

The present invention provides a frame connection structure of a building connecting both ends of the PC girder member to the steel pillar member to achieve the above object, the stopper welded to the front and rear flanges of the steel pillar member; A base plate having both side plates in close contact with both edges of the front and rear flanges, a front and rear face plates welded at right angles to the front and rear ends of the side plates, closely adhered to the front and rear flanges, and whose lower ends are supported by the stopper; Both side support plates welded horizontally to the upper surface of the front and rear support plates welded horizontally to the upper end of the front and rear face plates, and one side end of the two side plates and the front and rear face plates, respectively, and the upper end is welded to the lower surface of the support plate. A pair of brackets having a plurality of reinforcing ribs, and both side fastening pieces welded to the inner ends of the front and back plates and the front and back supporting plates to punch a plurality of bolt holes; A fastening bolt penetrating the fastening hole of the fastening piece; It provides a frame connection structure of the building, characterized in that it comprises a nut fastened to the fastening bolt.

In another aspect, the present invention comprises the steps of welding fixing the stopper to the flange of the steel pillar member exposed to the ground installed to achieve the above object; A base plate having both side plates and front and rear plates welded at right angles to the front and rear ends of the side plates, both supporting plates horizontally welded to the upper surface of the side plates and bored with anchor bolts, and horizontally on top of the front and rear plates A front and back support plate welded and drilled with anchor bolt holes, a plurality of reinforcing ribs, one end of each of which is welded to the both side plates and the front and back plates, and the upper end of which is welded to the bottom surface of the support plate, and the front and back plate and the front and back support plates. Prepare a pair of brackets having both fastening pieces welded to the inner end of the plurality of bolt holes perforated, so that both side plates are in close contact with both edges of the front and rear flanges, the front and back plates are in close contact with the flange and the front and rear plates are To be supported by the stopper, and through the fastening bolt to the bolt hole to fasten the nut by a pair of brackets are coupled Fixing to the steel column member; It provides a frame connection method comprising a step of placing both ends of the PC girder member exposed to the fixing bars (21, 22) on both ends and the upper surface of the support plate and the front and rear support plate of the bracket.

According to the connection structure of the vertical frame portion and the PC girder member of the building of the present invention and its construction method, the connection to the PC girder member made of steel by supporting the PC girder member in a hanging manner to the bracket coupled to the steel pillar member It can be applied in an optimal state even when using a general PC girder member in which only fixing bars are exposed at both ends without embedding the member in advance.

In addition, according to the connection structure of the vertical frame portion and the PC girder member of the building of the present invention and the construction method thereof, the PC girder member is supported on the bracket which is coupled in a form that surrounds the steel pillar member, and the PC girder member of the bracket By fixing more than 2 ~ 4 anchor bolts in the lower part, the frame can resist some of the lateral force, and by installing the steel plate bracket with ribs at the joint of the steel column and the beam, the concrete is poured at the joint of the column and the slab and the frame is integrated. Structures such as anchors, brackets, and rebars ensure continuity to increase stiffness and ductility against lateral and compressive forces, thereby improving resistance to joints and columns. Or, it is more economical than the steel beam-filled concrete beam-type structure, It is effective to secure the quality.

Hereinafter, the frame connection structure of the building according to the present invention and its method will be described in detail according to the embodiment shown in the accompanying drawings.

1 is an exploded perspective view of a stopper and a bracket used in the present invention, FIG. 2 is a plan view showing a frame connection structure of a building according to the present invention, FIG. 3 is a longitudinal sectional front view, FIG. 4 is a longitudinal lateral view, and FIGS. 5 is a perspective view showing a state in which a stopper is fixed to a steel pillar member, and FIGS. 6A and 6B are plan perspective views and a bottom surface of a bracket coupled to a steel pillar member. 7A and 7B are a plan perspective view and a bottom perspective view showing a state in which a PC girder member is supported on a bracket, and FIG. 8 is a perspective view showing a state in which reinforcing bars and slabs are reinforced, and FIG. 9 is steel concrete columns and Is a perspective view showing a state in which the slab is constructed,

10 to 13 is another embodiment of the stopper of the present invention, Figure 10 is an exploded perspective view of the stopper and the bracket used in the present invention, Figure 11 is a perspective view showing a state in which the stopper fixed to the steel column member, Figure 12a and Figure 12b is a top perspective view and a bottom perspective view showing a state in which the bracket is coupled to the steel pillar member, Figures 13a and 13b is a top perspective view and a bottom perspective view showing a state in which the PC girder member is supported on the bracket.

Frame connection structure of the building according to the invention as shown in Figures 1 to 4,

In connecting the steel pillar column member 10 and the PC girder member 20 of the H pile,

A stopper 30 welded to the front and rear flanges 11 and 12 of the steel frame member 10;

Both side plates 41a and 51a in close contact with both edges of the front and rear flanges 11 and 12 and the front and rear ends of the side plates 41a and 51a are welded at right angles to the front and rear flanges 11 and 12. And base plates 41 and 51 having front and rear plates 41b and 51b whose lower ends are supported by the stopper 30, and both side support plates 42 which are horizontally welded to the upper surfaces of the side plates 41a and 51a. 52) and one side of the front and rear support plates 43 and 53 welded horizontally to the upper ends of the front and rear plates 41b and 51b, and the side plates 41a and 51a and the front and rear plates 41b and 51b, respectively. A plurality of reinforcing ribs 44 and 54 whose end portions are welded and the upper ends thereof are welded to the lower surfaces of the supporting plates 42, 43, 52 and 53, and the front and rear face plates 41b and 51b and the front and rear supporting plates 43 and 53. A pair of brackets 40 and 50 which are welded to the inner end of the back and have both fastening pieces 45 and 55 in which a plurality of bolt holes 46 and 56 are drilled;

Fastening bolts 61 penetrating through the bolt holes 46 and 56 of the fastening pieces 45 and 55;

And a nut 62 fastened to the fastening bolt 61.

The PC girder member 20 has anchoring bars 21 and 22 at both ends and an upper surface thereof, and anchor nuts 23 are embedded at both ends thereof to be exposed from the bottom surface, and vertical roots for seeding pillars at the edges of both ends thereof. It has a cutout part 24 for rectifying 81a).

The anchoring roots 21 and 22 bend the ends, respectively, and the anchoring rods 21 cross the anchoring rods of the PC girder member 20 connected in all directions as shown in FIG. To ensure structural stability, such as rebar hook fixing.

Four anchor nuts 23 are each embedded, but may be increased or decreased depending on the structure.

The stopper 30 is used to cut the steel sheet to have a length corresponding to the width of the flanges (11, 12) of the steel column member (10). In another embodiment, as shown in FIGS. 10 to 13, it is possible to reduce the length of the stopper 30 by dividing it rather than integrally.

The front and rear plates 41b and 51b of the pair of brackets 40 and 50 have a width narrower than half of the width of the flanges 11 and 12 of the steel frame member 10. When both side plates 41a and 51a of the upper and lower side plates 41a and 51a are brought into close contact with both edges of the flanges 11 and 12 of the steel frame member 10, the fastening bolt 61 and the nut 62 are disposed between the front and rear plates 41b and 51b. It is preferable to form a tightening margin (C) that can be tightened by tightening.

Anchor bolt holes (47, 48, 57, 58) through which the anchor bolt (70) fastened to the anchor nut (23) of the PC girder member (20) is perforated in the supporting plates (43, 53).

The anchor bolt holes (47, 48, 57, 58) are each drilled four but may be increased or decreased depending on the structure.

Hereinafter, a method for connecting a frame of a building according to the present invention will be described.

Here, since the construction of the earth wall and the ground perforation and the installation of the steel column member are made in a general manner, a detailed description thereof will be omitted and the following description will be made after the steel pillar member installed in the perforation is exposed.

In the first step, as shown in FIG. 5, the stopper 30 is welded and fixed to the flanges 11 and 12 of the steel pillar member 10 which is installed and exposed on the ground, or is divided as shown in FIGS. 10 to 13. Weld each one.

In a second step, as shown in Figs. 6A and 6B, both side plates 41a and 51a and front and back plates 41b and 51b are welded at right angles to the front and rear ends of the side plates 41a and 51a. Base plates 41 and 51, both side support plates 42 and 52 welded horizontally to the upper surfaces of the side plates 41a and 51a, and the anchor bolt holes 47 and 57 are drilled, and the front and rear face plates 41b, 51b) horizontally welded to the upper end of the front and rear support plates (43, 53) and the anchor bolt holes (48, 58) and the two side plates (41a, 51a) and the front and rear plates (41b, 51b), respectively. A plurality of reinforcing ribs 44 and 54 having one end portion welded to the bottom surface of the supporting plates 42, 43, 52 and 53, and the front and rear side plates 41b and 51b and the front and rear supporting plates 43, 53, brackets 40 and 50 having both side fastening pieces 45 and 55 welded to the inner ends of the plurality of bolt holes 46 and 56 are prepared so that both side plates 41a and 51a are moved back and forth. Adhering to both edges of the side flanges 11 and 12 (41b, 51b) is in close contact with the flanges (11, 12), and the front and rear plates (41b, 51b) to be supported by the stopper 30, the fastening bolt 61 to the bolt holes (46, 56) Through the fastening the nut 62 to be coupled to the bracket (40, 50) to be fixed to the steel pillar member (10).

At this time, since the tightening margin C is formed between the front and rear plates 41b and 51b of the pair of brackets 40 and 50, when the fastening bolt 61 and the nut 62 are fastened, the pair of brackets 40 50 is firmly tightened to both edges of the flanges 11 and 12 of the steel pillar member 10.

Therefore, the pair of brackets 40 and 50 is supported by the stopper 30 welded to the steel pillar member 10 and is firmly tightened by the fastening bolt 61 and the nut 62, so that the steel pillar member 10 It is possible to ensure a sufficient strength when the bracket (40, 50) is firmly coupled to support the PC beam member 20 later.

In a third step, as shown in FIGS. 7A and 7B, both ends of the PC girder member 20 are disposed on both side support plates 42 and 52 and front and rear support plates 43 and 53 of the brackets 40 and 50. Put it up.

At this time, as shown in Figure 7b, the anchor bolt 70 through the anchor bolt holes (47, 48, 57, 58) perforated on both side support plates (42, 52) and front and back support plates (43, 53). It is preferable that the steel pillar member 10 and the brackets 40 and 50 are coupled to the anchor nut 23 embedded in the PC girder member 20 and exposed from the bottom surface thereof.

When the construction is completed by repeating these steps to the basement floor, the concrete is poured through the formwork and reinforcement process from the basement floor in the usual way to complete the steel column members, walls and construction open part slab.

That is, as shown in FIG. 8 in a conventional manner between the formwork for pillars (not shown) and the construction open part slab formwork (not shown) between the steel pillar member 10 and the PC girder members 20, respectively. And install the reinforcing bar (81) and the reinforcing bar (81), which becomes the vertical bar (81a) and the horizontal bar (81b) around the steel column member (10), and reinforces the reinforcing bar (82) for the construction open part slab. .

At this time, since the cutting portions 24 are formed at both edges of the PC girder member 20, the vertical roots 81 a of the reinforcing bar pillar 81 can be reinforced without the interference of the PC girder member 20. .

Finally, the concrete is poured into the pillar formwork and the construction open part slab formwork according to a conventional method, and cured to complete the seed column 90 and the slab 100 as shown in FIG. 9.

1 is an exploded perspective view of a stopper and a bracket used in the present invention;

2 is a plan view showing a frame connection structure of the building according to the invention,

3 is a longitudinal sectional front view,

4 is a longitudinal side view,

5 to 9 is a construction view showing the frame connection method of the building according to the present invention,

5 is a perspective view showing a state in which a stopper is fixed to a steel column member;

6a and 6b is a plan perspective view and a bottom perspective view showing a state in which the bracket is coupled to the steel pillar member,

7A and 7B are a plan perspective view and a bottom perspective view showing a state where the PC girder member is supported on the bracket;

8 is a perspective view showing a state in which the reinforcement for the reinforcing bars and slab reinforcement,

9 is a perspective view showing a state in which the steel concrete pillars and slabs are constructed,

10 to 13 is another embodiment of the stopper of the present invention,

10 is an exploded perspective view of the stopper and the bracket used in the present invention;

11 is a perspective view showing a state in which a stopper is fixed to a steel column member;

12A and 12B are a plan perspective view and a bottom perspective view showing a state in which a bracket is coupled to a steel frame member;

13A and 13B are a plan perspective view and a bottom perspective view showing a state where the PC girder member is supported on the bracket.

10: steel pillar member 20: PC girder member

23: anchor nut 24: cutout

30: stopper 40, 50: bracket

41,51: Base plate 42,52: Both side support plate

43,53: Front and back support plate 44,54: Reinforcement rib

45,55: Fastening piece 61: Fastening bolt

62: nut 70: anchor ball

Claims (7)

In the frame connection structure of the building connecting both ends of the PC beam member 20 to the steel pillar column member 10 made of H pile, A stopper 30 welded to the front and rear flanges 11 and 12 of the steel frame member 10; Both side plates 41a and 51a in close contact with both edges of the front and rear flanges 11 and 12 and the front and rear ends of the side plates 41a and 51a are welded at right angles to the front and rear flanges 11 and 12. And base plates 41 and 51 having front and rear plates 41b and 51b whose lower ends are supported by the stopper 30, and both side support plates 42 which are horizontally welded to the upper surfaces of the side plates 41a and 51a. 52) and one side of the front and rear support plates 43 and 53 welded horizontally to the upper ends of the front and rear plates 41b and 51b, and the side plates 41a and 51a and the front and rear plates 41b and 51b, respectively. A plurality of reinforcing ribs 44 and 54 whose end portions are welded and the upper ends thereof are welded to the lower surfaces of the supporting plates 42, 43, 52 and 53, and the front and rear face plates 41b and 51b and the front and rear supporting plates 43 and 53. A pair of brackets 40 and 50 which are welded to the inner end of the back and have both fastening pieces 45 and 55 in which a plurality of bolt holes 46 and 56 are drilled; Fastening bolts 61 penetrating through fastening holes 47a and 47b of the fastening pieces 46a and 46b; Frame connection structure of the building, characterized in that it comprises a nut (62) fastened to the fastening bolt (61). The frame connection structure of claim 1, wherein the stoppers are welded by dividing their lengths into small pieces. The front and rear plates 41b and 51b of the pair of brackets 40 and 50 are configured to have a width narrower than half of the width of the flanges 11 and 12 of the steel frame member 10. Fastening bolts 61 between the front and rear plates 41b and 51b when the side plates 41a and 51a of the brackets 40 and 50 are brought into close contact with both edges of the flanges 11 and 12 of the steel column member 10. Frame connection structure of the building, characterized in that the fastening margin (C) that can be tightened by fastening with the nut (62). According to claim 1, Anchor nuts (23) exposed from the lower surface is embedded at both ends of the PC girder member (20), Anchor bolt holes (47, 48, 57, 58) on both side support plates (43, 53) Structural connection structure of the building, characterized in that the anchor bolt 70 is bored through the anchor bolt hole is fastened to the anchor nut (23). The frame connection structure of claim 1, wherein a cutout portion 24 is formed at both end edges of the PC girder member 20 to avoid interference with vertical bars of the reinforcing bar pillar. Welding the stopper 30 to the flanges 11 and 12 of the steel pillar member 10 exposed and installed on the ground; Base plates 41 and 51 having both side plates 41a and 51a and front and back plates 41b and 51b welded at right angles to the front and rear ends of the side plates 41a and 51a, and the side plates 41a and 51a. And horizontally welded to the upper surfaces of the upper and lower support plates (42, 52) and the anchor bolt holes (47, 57) and the front and back plates (41b, 51b) are welded horizontally and anchor bolt holes (48, 58) ) And one end of each of the side plates 41 and 53 and the side plates 41a and 51a and the front and rear plates 41b and 51b, respectively, and the support plates 42, 43, 52 and 53 are perforated. A plurality of bolt holes 46 and 56 are welded to a plurality of reinforcing ribs 44 and 54 whose upper ends are welded to the lower surface of the lower surface, and to inner ends of the front and back face plates 41b and 51b and the front and back support plates 43 and 53. ) And brackets 40 and 50 having both side fastening pieces 45 and 55 perforated, and the side plates 41a and 51a are brought into close contact with both edges of the front and rear flanges 11 and 12, and the front and rear plates ( 41b and 51b are in close contact with the flanges 11 and 12 The front and rear surface plates 41b and 51b are supported by the stopper 30, and the bolts 46 and 56 pass through the fastening bolts 61 to fasten the nuts 62 to thereby secure the brackets 40 and 50. While being coupled to the steel frame pillar 10; Lift both ends of the PC girder member 20 having the fixing bars 21 and 22 exposed on both ends and the upper surface of the support plates 42 and 52 and the front and rear support plates 43 and 53 of the brackets 40 and 50. Frame connection method of the building comprising the step of laying. The method according to claim 6, wherein the anchor bolt 70 through the anchor bolt holes (47, 48, 57, 58) perforated in both the support plates (42, 52) and the front and back support plates (43, 53). The structure of the building characterized in that it further comprises the step of fastening to the anchor nut 23 is embedded in the member 20 and exposed from the lower surface to the steel pillar column member 10 and the bracket (40,50) Frame connection method.

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