KR101532372B1 - Girder with end diaphragm for emi-integral abutment bridge - Google Patents

Abstract

The present invention relates to a girder having end diaphragms capable of obtaining a synthesis performance while simply connecting end cross beams for an abutment and the ends of a girder. The girder has end diaphragms longitudinally extended in the ends of the girder with a block shape and having guide parts. The guide parts protrude from the middle of the side surfaces while being extended downward to the bottom surface to insert both side plates of the prefabricated cross beams in both sides thereof.

Description

{GIRDER WITH END DIAPHRAGM FOR EMI-INTEGRAL ABUTMENT BRIDGE}

The present invention relates to a girder provided with an end diaphragm. More specifically, the present invention relates to a girder provided with an end diaphragm capable of easily connecting an end portion of a rope and a girder at alternate end portions while ensuring a sufficient synthetic performance.

FIG. 1A shows a construction diagram of a conventional half-circle bridge.

The half-body bridge is constructed such that the bridge support 20 is installed on the upper surface of the bridge 30 before the bridge girder 10 is mounted between the turns 40 and the alternate chest wall 30 is supported by the bridge support 20 And the alternate chest wall 30, the back chest A is placed on the back side of the completed alternate chest wall 30 after the girder 10 is mounted.

The installation of the connecting slab (50) on the upper back surface of the alternate chest wall (30) so as to be in direct contact with the girder (10) eliminates the installation of the expansion joint to overcome the difficulty of maintenance due to the installation of the expansion joint This is a bridge construction method.

At this time, both ends of the girder 10 and the alternate chest wall 30 are reinforced by integrating the concrete by using the formwork.

In other words, there is a problem in that the construction of the conventional half-body bridge is inevitably required to be carried out by the formwork and the concrete placed on the spot in the process of alternating chest wall construction and after the installation of the girder.

1B shows a perspective view of a girder 10 used in a conventional half-body bridge. The girder 10 is basically an I-shaped PSC girder, and in particular, at both ends of the girder, the end partition 12 is formed to be larger than the width of the girder in the transverse direction.

The end partition walls 12 also function as a conduction preventing member of the girder 10 and are alternately mounted so that the adjacent end portions 12 are stronger than one another so that the resistance against the earth pressure acting alternately can be shared, And to make construction work possible.

1B, a girder 10 formed at both ends of the end partition 12 is installed to be supported by a bridge support (not shown) on the upper surface of the alternating 40, and the girder 10 spaced apart in the lateral direction The concrete 13 is installed in the space between the end partitions 12 by using the dies not shown so that both end portions of the girder 10 are alternately integrated with each other.

However, since the girders using such end partition walls 12 are formed so as to share the earth pressure acting alternately, the weight of the girders can be excessively increased, and a mold for manufacturing must be additionally provided. There is a limit to the economical efficiency.

Also, on the side of construction, the workability and workability were inevitably lowered by using the formwork and the cast concrete in order to strengthen the ends of the girder and the alternation.

Figure 1C shows a conventional prefabricated beam 60. The girders used for the bridges are arranged alternately in the transverse direction on alternating piers, and cross beams should be installed in order to constrain the girders in the transverse direction.

In this case, since the horizontal alternation is carried out by the elevation work such as the normal alternation and the upper part of the pier, it is necessary to adopt a quick and safe construction method. When the cross beam is installed with the concrete placed on the site, inconvenience, workability and workability In the case of concrete beams, there is an example using prefabricated cross beams made of concrete.

That is, as shown in Fig. 1C, the bottom panel 61 and the two-wall panel 62 are disposed between the end side faces of the mounted girder, in the form of a box-shaped U-shaped cross section with the top and both ends open And the concrete ribs are poured into the assembled cross beams 60 so that the assembled beams 60 are integrally formed between both ends of the girders.

At this time, in order to secure the integrity, the bottom panel 61 is formed as a two-layer panel, but the connecting reinforcing bars 63 are projected, and a shear connection member (lattice reinforcing bar) is formed on the inner side surface of the both wall panels 62 .

As shown in FIG. 1d, the installation perspective of the assembled cross beam 60 is shown in the case of the one-half bridge.

In other words, it can be seen that each of the bottom panel 61 and the two-wall panel 62 is assembled in a narrow space in the construction of the end-effected robo. For example, when the prefabricated beam 60 is applied to a half- It can be seen that there is a complication and a difficulty in the construction depending on the shape of the end partition wall 12 formed at the end of the back girder to install the block bottom panel 61a between the end partition walls 12 of the girder 10.

Therefore, in the construction of a half-girder bridge, it is possible to integrate the ends of the girder and the alternation with each other by using the assembled beam, and to simply insert the lower part of the girder between the inside of the end of the girder, The girder itself can be easily installed without requiring an unnecessary formwork operation so that the girder itself can be easily installed so that the end diaphragm having an end diaphragm which can be more efficiently and economically installed can be provided. The present invention has been made to solve the above-mentioned problems occurring in the prior art.

In order to achieve the above object,

First, the end diaphragm of the block shape (spherical shape, rectangular shape) is installed at both ends of the girder in order to assure the unity by the concrete installation while easily installing the prefabricated beam. The width of the end diaphragm is formed to be easily formed by the cast concrete, and the width of the end diaphragm is formed to match with the width of the end of the girder to minimize the increase of self weight. .

In addition, the guide portion formed on the side surface may protrude in the form of a front end block to secure the composite performance of the concrete to be laid, and a shear connection member may be additionally formed in the front end block.

In addition, the guide portion can be formed in a shape that allows the assembled rib to be inserted downward (up and down direction), so that the assembled rib can be easily installed by downward insertion.

Secondly, both side plates of the prefabricated lateral side are supported on both sides of the bottom plate so that they can be easily assembled to each other with fasteners such as bolts. Inside the side plates, So that it can be installed independently.

The half-body bridge according to the present invention can be easily supported by an alternating bearing installed in an alternating manner, and the end diaphragm and the assembled beam can be used to easily form the end rovers in which the ends of the girders are integrally transversely integrated with each other.

In this case, the girder formed with the end diaphragm effectively shares the earth pressure acting from the alternating diaphragm, while the end diaphragm is formed in the girder which is brought into the site simply by reusing the manufactured die, so that the controllability and efficiency And the ease of transportation and installation).

In addition, the end diaphragm can be installed in a block shape corresponding to the width of the girder, and the assembled cross bar can be installed downwardly into the end diaphragm, so that the workability and operability of the end of the girder are improved So that it can be sufficiently secured.

Also, it is possible to assemble both side plates and the bottom plate of the prefabricated side view into a simple fastening structure, and to make the prefabricated side girders and the end diaphragm-formed girders integrally synthesized by the concrete placed inside, So that the girder end treatment becomes possible.

In addition, it is possible to easily assemble the two side plates to each other with fasteners such as bolts in a state where the side plates are supported on both side surfaces of the bottom plate, and the inner side restraint can be easily installed independently It can be seen that semi-integral bridge construction using the pre-cast method is used for both ends of the girder at the end of the girder but the concrete method is also used for the synthesis.

FIGS. 1A and 1B are views showing a construction of a conventional half-girder bridge, a girder and an end extract used in a conventional half-girder bridge,
1C is an assembled perspective view of a prefabricated cross beam used in a conventional half-
FIG. 1D is an assembled perspective view of a prefabricated cross beam used in a conventional half-
FIGS. 2A, 2B and 2C are cross-sectional views of a girder having an end diaphragm according to the first embodiment of the present invention,
FIGS. 3A, 3B and 3C are cross-sectional views of a girder having an end diaphragm according to a second embodiment of the present invention,
4A and 4B are views showing a construction sequence of a girder having an end diaphragm according to the first embodiment of the present invention,
5A and 5B are construction diagrams of a girder having an end diaphragm according to a second embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when an element is referred to as "comprising ", it means that it can include other elements as well, without excluding other elements unless specifically stated otherwise.

[Girder 100 with end diaphragm 200a of the present invention]

FIGS. 2A, 2B and 2C are views showing the construction of the girder 100 having the end diaphragm 200a according to the first embodiment of the present invention,

FIGS. 3A, 3B and 3C illustrate the construction of the girder 100 having the end diaphragm 200b according to the second embodiment of the present invention, and the construction and combination of the assembly beams 400. FIG.

The girders 100 according to the first and second embodiments will be described with reference to a PSC girder. The shapes of the end diaphragms 200a and 200b in the same girder are different from each other. .

[Girder 100 having end diaphragm 200a according to Embodiment 1]

FIGS. 2A, 2B and 2C are a combination of the girder 100 having the end diaphragm 200a according to the first embodiment of the present invention and the prefabricated cross beam 400. FIG.

2A, the girder 100 may be a PSC girder for bridges. The half-girder bridges are not limited to the girders themselves, since the end girder bridges the ends of the girders in the crosswise direction.

Accordingly, the girder 100 will be described with reference to a PSC girder, and the present invention further forms an end diaphragm 200a at both ends of the girder 100. FIG.

The girder 100 is an I-shaped section, which is composed of an upper flange, an abdomen, and a lower flange, and is manufactured to introduce a prestress in a longitudinal direction using a tension member.

Both end portions of the PSC girder are formed as a specific end portion in block form in consideration of the installation of the fixing device and the local stress action.

This end diaphragm 200a is formed to extend further in the longitudinal direction from the specific end portion, which can be manufactured together with the PSC girder, but it is preferable to use a separate form in the field.

That is, since the end diaphragm 200a is used for a half-girder bridge in particular, it is easier to manufacture the formwork in the form required in the field rather than to form it at the time of manufacturing the PSC girder, It is possible to solve the problem of transportation due to the problem.

The end diaphragm 200a is also formed in a block shape so that the extension length L corresponds to the bridge extension length and the width W is formed to be substantially equal to the specific end width of the girder 100 And a protruding guide portion 210a is formed at the center of one side surface or both side surfaces.

The guide portion 210a has a front edge A1 and a rear edge A2 so that the both side plates 420 of the assembled side beam 400 can be downwardly inserted on both sides of the guide portion 210a as shown in FIGS. In a trapezoidal cross-section on the side of the central part of the position slightly spaced from the bottom surface.

2A, a plurality of holes 220a are formed in the guide portion 210a, and a shear connection member 230a such as a reinforcing bar is inserted and protruded in the hole, So that the composite performance of the concrete 210a and the concrete C installed is ensured.

2B and 2C, the assembled beam 400 is assembled between the end diaphragms 200a of the girder 100 mounted on the alternating 500 and the concrete C is inserted into the assembled beam 400. [ So that the ends of the girders 100 are integrated by the assembled beam 400 and the beams of the girders formed by the integrated assembly of the end diaphragm 200a and the assembled beam 400 are referred to as an end view .

As shown in FIGS. 4A and 4B, the ribs 400 are inserted downward on both sides of the guide portion 210a. In order to maximize the use of the space, the bottom plate 410 and the side plates 420 of the assembled cross bar 400 are formed to have a narrow space when the assembled cross bar 400 is installed in the alternate upper space. (Crane or the like) in the space so as to improve the workability in the installation of the assembled crossbar 400 by the elevation work.

That is, the assembled cross bar 400 is a panel assembly formed of both side plates 420 and a bottom plate 410 as shown in FIGS. 2A, 2B and 2C, And is inserted downward so as to be inserted between the both end diaphragms 200a of the adjacent girders 100. [

The bottom plate 410 is formed to conform to the shapes of the guide portion 210a and the guide portion 210a of the end diaphragm 200a so that the guide portion 210a of the end diaphragm 200a does not interfere with the downward insertion 2B) so as to facilitate the downward insertion.

The lower plates 410 are fixed to both sides of the lower plate 410 so that the lower surfaces of the both side plates 420 are in contact with the upper surface of the lower plate 410, And both side plates are assembled and installed on the bottom plate by means of fasteners such as anchor bolts passing through the bottom of both side plates and the fixing block.

The two side plates 420 are formed in a vertical panel shape as shown in FIG. 2B, and a plurality of inner fixing members 421, for example, in the form of a ring are formed on the inner side surfaces of the opposite side plates facing each other, 422 are connected to both ends of the inner fastener 421 so that the two side plates 420 are not separated from each other by the stable self-standing installation and the concrete insertion pressure.

The bottom plate 410 and the side plates 420 may be made of a reinforced concrete panel as shown in FIG. 2C. When the concrete plate C is installed in the assembled state, the inner fixture 421 and the inner fixture 422, The end diaphragm 200a and the assembled side beam 400 are combined by concrete to be integrated so that the end robo is formed.

Accordingly, the present invention can be installed by inserting the bottom plate 410 and the both side plates 420, which constitute the assembled cross bar 400, downwardly.

[Girder 100 having end diaphragm 200b according to Embodiment 2]

3A, 3B and 3C are a combination of the girder 100 having the end diaphragm 200b and the prefabricated girder 400 according to the second embodiment of the present invention.

First, as shown in FIG. 3A, the girder 100 will be described with reference to a PSC girder as in the first embodiment. In the present invention, an end diaphragm 200b is further formed on the girder 100.

Accordingly, the girder 100 is formed as an I-shaped section, which is composed of an upper flange, an abdomen, and a lower flange, and is manufactured to introduce a prestress in a longitudinal direction by using an unillustrated tension member.

Both end portions of the PSC girder are formed as specific end portions in a block shape in consideration of the installation of the fixing apparatus and the local stress action.

The end diaphragm 200b is formed so as to extend further in the longitudinal direction from the specific end portion. The end diaphragm 200b may be manufactured at the time of manufacturing the PSC girder, but it is preferable to use the separate die at the site.

That is, since the end diaphragm 200b is used particularly for a half-girder bridge, it is more convenient to form the dies in the form required in the field rather than to form them at the time of manufacturing the PSC girder, So that the problem of transportation due to the above-mentioned problems can be solved.

The end diaphragm 200b according to the second embodiment is also formed in a block shape so that the extension length L corresponds to the bridge extension length and the width W is equal to the specific end width of the girder 100 And a protruded guide portion 210b is formed at the center of both side surfaces.

Unlike the first embodiment, the guide part 210b is formed such that the shear beam extends vertically, and the shear beams are spaced apart from each other.

At this time, as in the first embodiment, the side plates 420 of the prefabricated side beam 400 are inserted at positions slightly spaced from the front edge A1 and the rear edge A2 so that the both side plates 420 can be inserted downward on both sides of the guide portion 210b. It can be seen that the shear beams are spaced apart from each other.

At this time, since a plurality of coupler burls or holes 220b are formed between the front end beams, a shear connection member 230b such as a reinforcing bar is inserted and protruded inside the holes, (C).

At this time, the assembled cross beams 400 are assembled and assembled between the end diaphragms 200b of the girders 100 mounted on the alternation 500 as shown in FIG. 3C, and the concrete C is placed in the assembled cross beams 400 The end portion of the girder 100 is integrated by the assembled cross beam 400 and the end portion diaphragm 200b of the girder and the assembled cross bar 400 are integrated to form a loop.

In the second embodiment as well, as shown in Figs. 5A and 5B, the assembled ribs 400 are inserted downward on both sides of the guide portion 210b.

In order to maximize the use of the space, the bottom plate 410 and the side plates 420 of the assembled cross bar 400 are formed, So that the workability can be improved in the installation of the assembled cross beam 400 by the elevation work.

The assembled cross bar 400 according to the second embodiment is a panel assembly having a U-shaped cross section formed by the both side plates 420 and the bottom plate 410 as shown in FIGS. 3B and 3C. Is inserted between the both end diaphragms (200b) of the main body (100).

The bottom plate 410 is fitted to both sides of the guide portion 210b and the guide portion 210b of the end diaphragm 200b so that the guide portion 210b of the end diaphragm 200b does not interfere with the downward insertion (The insertion end of FIG. 3B), so that the insertion can be performed downward.

As shown in FIG. 3A, the lower end of the front end beam corresponding to the insertion end is formed in a spherical shape so as to be inserted into the insertion end.

At this time, on the upper surface of the bottom plate 410, a fixing block 411 formed to be separated from the guide portion 210b is also formed. In other words, in the second embodiment, the fixing block 411 is formed corresponding to the entire size of the upper surface of the bottom plate, thereby enhancing the composite performance of the bottom plate and concrete while sufficiently securing the flexural rigidity of the bottom plate.

The lower surfaces of the both side plates 420 are brought into contact with the upper surfaces on both sides of the bottom plate 410 so that the inner side surfaces of the lower side plates 420 are fixed to the lower side of the both side plates 420 by being in contact with the fixing block 411 of the bottom plate 410 Both side plates are assembled on the bottom plate by an assembly bolt such as an anchor bolt passing through the block.

The both side plates 420 are formed in the form of a vertical panel, and a plurality of inner fixing members 421, for example, in the form of a ring are formed on the inner side surfaces of the opposite side plates facing each other, so that the inner side restricting member 422 functions as a shear connection member, So that it is prevented from being displaced by the stable self-standing installation of the side plates 420 and the concrete installation pressure.

The bottom plate 410 and the side plates 420 may be made of a reinforced concrete panel and the concrete C may be installed in the assembled state as shown in FIG. 3C to form the inner fixture 421 and the inner fixture 422, And the end diaphragm 200b is combined with the prefabricated cross beam 400 by concrete to form an end robo.

Therefore, the present invention can be installed by inserting the bottom plate and the both side plates constituting the assembled side beam 400, and thus it can be understood that the workability in assembly is excellent.

[Construction method of girder 100 having end diaphragms 200a and 200b of the present invention]

4A and 4B are flowcharts of a method of constructing the girder 100 having the end diaphragm 200a according to the first embodiment of the present invention.

[Method of constructing the girder 100 having the end diaphragm 200a according to the first embodiment]

First, as shown in FIG. 4A, an alternation 500 of a half-body bridge is constructed. The alternations will be constructed so that they are spaced apart from each other in the direction of the throttle axis.

The bridge 500 supports the girder 100. The bridge unit 530 is installed on the upper part of the wall unit 510 to support the girder 100. [

The wings 520 are in the form of vertical walls extending from both side rear surfaces of the upper part of the wall, so that the inner space is backfilled so that the connecting slab can be constructed.

After the girder 100 is brought to the site, the end diaphragm 200a is formed at both ends of the girder 100 by using a mold.

It can be understood that the end diaphragm 200a is formed in a block shape so that the guide portion 210a is formed on both side portions or one side portion.

Thus, the girder 100 having the end diaphragm 200a is lifted and is mounted to be supported by the bridge support 530 of the alternation 500 previously constructed. At this time, a soul plate is preferably formed on the bottom of the end for fixing the girder 100.

It can be seen that the girders 100 having the end diaphragm 200a formed on the upper surface of the alternator 500 are installed to be spaced from each other in the transverse direction and a guide portion 210a is protruded between the end diaphragms 200a Is formed.

Next, as shown in FIGS. 4A and 4B, the bottom plate 410 constituting the assembled cross bar 400 is inserted downwardly between the end diaphragms 200a.

It can be understood that the bottom plate 410, which is inserted downward so that the bottom surface of the bottom plate 410 coincides with the bottom surface of the end diaphragm 200a, can be installed by fully utilizing a narrow space such as an alternating upper portion.

Thus, both side plates 420 are also downwardly inserted into upper and lower surfaces of the bottom plate 410 to provide a U-shaped cross-sectional side beam 400.

At this time, the fixing block 411 and the side plates 420 of the bottom plate are integrally assembled by fasteners such as anchor bolts fastened to the fastening holes as shown in FIG. 2b.

Thus, it can be seen that the installation of the assembled beam bar 400, which serves as a mold for the installation of the robot, is completed at both ends of the girder 100 formed with the end diaphragm 200a.

An inner fixing member 422 such as a chain is connected to an annular inner fixing member 421 formed to protrude from the inner side surfaces of the both side plates 420 of the assembled side beam 400, And the concrete (C).

At this time, in order to adjust the height of the assembled cross beam 400, a work such as a pedestal or the like not shown may be provided on the upper surface of the alternate frame.

It can be seen that the fixed girder 100 is integrated by the side ropes and is mounted on the alternation 500. The back side of the wing 520 is backfilled and the connecting slab is constructed so as to coincide with the upper side of the girder, It is possible to exclude the installation of the conventional expansion joint device.

These connecting slabs may be installed at the height of the top surface of the end robo, and may be pre-cast or built-in concrete.

[Method of constructing the girder 100 having the end diaphragm 200b according to the second embodiment]

5A and 5B are flowcharts of a girder construction method with an end diaphragm according to a second embodiment of the present invention.

First, as shown in FIG. 5A, the shift 500 of the half-body bridge is constructed. The alternations will be constructed so that they are spaced apart from each other in the direction of the throttle axis.

The alternating frame 500 is constructed so that the wall part 510 and the wing wall 520 are installed together and the wall part 510 is provided with a bridge support 530 on the upper surface to support the girder 100. [

The wings 520 are in the form of a vertical wall extending from the backside of both sides of the upper part of the wall, and are backfilled in the inner space to enable the construction of the connecting slab.

After the girder 100 is brought to the site, the end diaphragm 200b is formed at both ends of the girder 100 by using a mold.

It is also understood that the end diaphragm 200b is formed in a block shape so that the guide portion 210b is formed on both side portions or one side portion.

The girder 100 having the end diaphragm 200b formed thereon is lifted and is mounted so as to be supported by the bridge support 530 of the alternation 500 previously constructed. At this time, a soul plate is preferably formed on the bottom of the end for fixing the girder 100.

It can be seen that the girders 100 provided with the end diaphragm 200b on the upper surface of the alternator 500 are spaced apart from each other in the transverse direction and a guide portion 210b protrudes between the end diaphragms 200b .

Next, as shown in FIGS. 5A and 5B, the bottom plate 410 constituting the assembled cross beam 400 is inserted downward between the end diaphragms 200a on both sides of the guide portion 210b. It can be understood that the bottom plate 410 inserted so that the bottom surface of the bottom plate 410 coincides with the bottom surface of the end diaphragm 200b can be installed by taking advantage of a narrow space such as an alternating upper portion.

Next, the both side plates 420 are also downwardly inserted into the upper side of the bottom plate so that the U-shaped cross-section of the assembled cross beam 400 can be assembled and installed.

At this time, the fixing block 411 and the side plates 420 of the bottom plate are integrally assembled by means of fasteners such as anchor bolts fastened to the fastening holes.

Thus, it can be seen that the provision of the assembled cross beam 400, which serves as a mold for the construction of the robot, is completed at both ends of the girder 100 formed with the end diaphragm 200b.

An inner fixture 422 such as a chain is connected to an inner fixture 421 formed of a lattice reinforcement in the form of a triangular three-dimensional body formed so as to protrude from the inner side surfaces of the both side plates 420 of the assembled cross bar 400, 420) and the concrete installation pressure.

At this time, in order to adjust the height of the assembled side beam 400, it is sufficient to work on the upper surface of the alternating frame, for example.

It can be seen that the fixed girders are integrated by the side ropes to be mounted on the alternation 500 and are backfilled on the rear side of the wing 520. The connecting slab is constructed so as to coincide with the upper surface of the girder, It is possible to exclude the installation of the conventional expansion joint device.

Again, these connecting slabs need only be installed at the height of the top surface of the end robo, and can be pre-cast or built-in concrete.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: girder
200a: End diaphragm (Example 1)
210a: guide portion 220a: hole
230a: Shear connector
200b: End diaphragm (Example 2)
210b:
220b: hole 230b: shear connector
400: Prefabricated beam
410: bottom plate 411: fixed block
420: Both side plates 430: Hole
500: alternating 510: wall portion
520: wing wall 530: bridge support

Claims (4)

And the guide plates 210a and 210b protrude downward to the bottom of the side panels 420 of the assembled side bar 400 so that the side plates 420 can be inserted downward. The end diaphragm in which the prefabricated longitudinal beam 400 is inserted is formed in the shape of a block extending in the longitudinal direction at the end of the PSC girder having the fixing device such that the prestress is introduced in the longitudinal direction, At the end,
The prefabricated beam 400 includes a pair of side plates 420 and a bottom plate 410 inserted between the adjacent end diaphragms and is assembled in a U-shaped cross section, And an end diaphragm for forming an end rope at an end of the girder which is stationary at the turn for a half-bridge by the step (C). The method according to claim 1,
The guide portion 210a
A plurality of coupler burls or holes 220a are formed in the trapezoidal section and the shear coupling member 230a is inserted and protruded into the holes so that the concrete portion C inserted into the guide portion 210a, So that it is possible to secure the synthesis performance of the semiconductor device,
The bottom plate 410 is formed with a guide portion 210a of the end diaphragm 200a and an insertion end portion formed in a shape corresponding to the shape of the guide portion 210a so that the guide portion of the end diaphragm 200a does not interfere with the downward insertion of the guide portion. The side plates 420 are formed in a vertical panel shape and have end diaphragms inserted into both sides of the guide portion of the end diaphragm to be self-supportingly assembled to the bottom plate 410 Girder. The method according to claim 1,
The guide portion 210b
A plurality of coupler burls or holes 220b are formed between the front ends of the beams, and a shear connection member 230b is inserted and protruded into the holes, So that it is possible to secure the composite performance of the concrete (C)
The bottom plate 410 is formed to have a shape corresponding to the shape of the guide portion 210b and the guide portion 210b of the end diaphragm 200b so that the guide portion of the end diaphragm 200b does not interfere with the downward insertion of the guide portion. The side plates 420 are formed in a vertical panel shape and have end diaphragms inserted into both sides of the guide portion of the end diaphragm to be self-supportingly assembled to the bottom plate 410 Girder. The method according to claim 2 or 3,
A plurality of inner fasteners 421 are formed on the inner side surfaces of the both side plates 420 and the inner fasteners 422 are connected to both ends of the inner fastener 421, And an end diaphragm for preventing the position from being displaced by the concrete insertion pressure.

Images