KR100698354B1 - Construction structure of beam with apparatus for prestressing and the method - Google Patents

Abstract

The present invention provides a sliding portion formed at both ends of the beam in order to introduce the necessary compression prestress to the bridge beam, the structural beam, the reinforcement beam; U-shaped so as to surround both ends of the beam while contacting the sliding portion A tension reset member including a fixing device mounted on both sides as a member; And an intermediate support member protrudingly mounted on the abdominal surface of the beam, the intermediate supporting member having horizontal through holes formed therebetween so that the tension member, which is fixed after tension between the fixing devices, can be inserted through the abdomen of the beam. An introduction method for introducing prestress into a beam using a prestressing tensioning device.

Prestressed, bridged, rigid, perforated plate

Description

Construction structure of beam with device for prestress introduction and construction method of construction {{construction structure of beam with apparatus for prestressing and the method}

1A, 1B and 1C show a structural beam with a conventional prestressing tension device.

Figure 2a shows a structural beam installed in the prestressing tension device of the present invention,

Figure 2b shows a state in which the sliding portion of the present invention is formed on the beam,

Figure 2c illustrates a state in which the sliding plate of the present invention is installed on the sliding portion,

Figure 2d shows the tension reset member of the present invention,

Figure 2e shows a beam in which the tension member is installed in the tension reset member of the present invention,

2F and 2G illustrate an intermediate support member, an excerpt perspective view, and a side view of the present invention.

Figures 3a, 3b, 3c and 3d are shown in sequence the working state of the structural beam is provided with a prestressing tension device of the present invention.

Figures 4a, 4b and 4c is a partial front view, an installation front view and a side view showing the installation structure of the structural beam is installed the prestressing tension device of the present invention.

5A and 5B show some front views of other installation structures of the structural beam with the prestressing tension device of the present invention installed.

<Description of Major Reference Signs>

100: tension device for introduction of the prestress of the present invention

110: sliding part 120: tension reset member

130: tension member 140: intermediate support member

142: through the horizontal

200,330b, 430b, 530a, 530b: Beam with prestressing tension device

320: Y-shaped beam support member 420: beam support member

440: inclined member 520a: lower tensile material

520b: upper lining material

The present invention relates to an installation structure and a method of installing the structural beam is provided with a prestressing tension device. More specifically, the present invention relates to a prestressing tension device installed outside the beam for introducing a compressive prestress required to a bridge beam, a structural beam, and a beam to be reinforced, and an introduction method for introducing a prestress into the beam using the same. .

1A and 1B illustrate a conventional prestress introduction device related to the present invention.

FIG. 1A relates to an improved acupressure supporting method and apparatus for external prestress reinforcing method introduced in Patent No. 265697, wherein the fixing plate 1 is attached to a PS concrete girder with a few anchor bolts 2. The end plate 3 is attached to the end of the girder by welding with the fixing plate 1, the fixing plate 4 is installed on the fixing plate, and the external steel wire 5 is connected through the fixing hole supported by the fixing plate. In the tension-supporting anchoring method and apparatus, at least one square bracing plate 6 is placed on an extension line of the end plate 3 and welded between the bracing plate and the fixing plate. At this time, the connection state of the end plate and the fixing plate is generally installed in a c-shape, and the end plate 3 and the fixing plate 1 are fixed to the beam end with a size smaller than the vertical height of the beam.

This fixing method is similar to the installation shape and installation size of the c-shape of the end plate and the fixing plate installed to surround the beam end in the present invention, but can be extended to the prestress introduction method introduced by the preflex beam There is a difference from the present invention.

Similar to the prior art, another conventional technique using the c-shaped both ends supporting bracket 10 is introduced in FIG. 1B as a repairing method and a repairing device of Patent No. 141551 bridge beam.

Also in the context of the present invention is similar in that it uses an installation form of both ends of the support brackets and the intermediate support brackets formed integrally to surround the beam end, but is extended to the prestress introduction method introduced by the preflex beam There is also a difference from the present invention.

Introduced as a method of introducing a prestress to the beam by the preflex beam is a patent 392679 external prestressing steel beam and its manufacturing method and bridge construction method by the steel beam, it will be described with reference to Figure 1c.

The fixing section 21 protruding from both ends of the lower flange of the steel beam 20, and the biasing member 22 protruding from the lower surface of the lower flange are attached and fixed, and the tendon 23 is spaced a predetermined distance from the lower surface of the steel beam. To be installed between the fixing unit but is installed in parallel with the deflection member 22 in a non-adhesive state.

At this time, when prestressing the tendon, the steel beams are bent upward by the tensile force, wherein the raised steel beams correspond to the preflex beams and the topped steel beams have at least an upper load sufficient to offset the rising amount. You can resist. Furthermore, when a downward deflection abnormality occurs due to an upper load to offset the rising amount, the biasing member spaced upward from the tendon as the rising treatment pushes down the tendon downwards, thereby providing additional tensile force as a kind of reaction force in the tendon. It has the effect of being introduced and the technical effect is described such that this additional tensile force will eventually be able to withstand the upper loads enough to generate an upward normal force in the steel beam and eventually cancel the rise.

But despite these advantages, there are a number of problems that

First, there is a problem that the fixing unit 21 and the biasing member 22 is installed on the lower surface of the steel beam to reduce the height of the bridge by the installation height or the communication area is reduced. This causes a problem that the application itself is impossible in the case of a bridge requiring a limited height and area, there was a problem that the application may be limited.

Second, the fixing unit 21 is fixed to the lower surface of the steel beam by welding or bolting, which corresponds to a method of supporting tensile force introduced into the tendon by leaflet force by bolts or the like. However, in the case of installing the steel beams between the long paper, the tensile force introduced to the tendon is inevitably increased, and in order to support the tensile force, there is a problem in that a bolt and a contact area installed on the lower surface of the fixing part and the steel beam must be largely formed.

Third, there is a problem in that the efficiency is somewhat reduced in introducing the prestress by the tension of the tendon 23. That is, since the tendons must be stretched in a horizontal state, there is a problem in that a relatively large tensile force must be introduced as compared with a method in which the tendons are installed in a parabolic form and then stretched.

Fourth, when the pre-stress is introduced into the steel beam 20, there is a difference in the degree depending on the amount of rise, but the steel beam may not only be bent to the upper and lower sides, but also warping may occur. In order to resist such warpage, it is necessary to secure the warpage stiffness sufficiently. For this purpose, there is a problem that a reinforcement such as a diaphragm needs to be installed separately.

 The present invention is to solve the above problems,

An object of the present invention is to introduce a pre-stress to the structural beam by a preflex beam method, while being able to install a fixing device in acupressure support method, it is possible to introduce more pre-stress more securely, it is possible to easily secure sufficient torsional rigidity The present invention provides a structural beam, a mounting structure thereof, and a method of installing the same, in which a prestressing tension device is installed.

The present invention to achieve the above technical problem.

First, the fixing height required for fixing the tension member and the intermediate support member for supporting the tension member in the middle of the beam are installed on the beam abdomen without installing the lower portion of the beam, resulting in an increase in beam height by the fixing device. It was not.

Secondly, the tensioning device necessary for tensioning the tension member was installed in such a manner as to wrap both ends of the beam in a c-shape to install a fixing device in acupressure support method, so that the tensioning force of the tension member could be more stably supported.

Third, when the tension member is initially installed, the tension member is fixed in a parabolic form so that the tension member can be moved while sliding down from the top of the beam so that the tension member can be horizontally tensioned. It was made.

Fourth, after installing an additional preflex beam on the substructure in order to install the upper part, which is a coping part of the substructure, on both sides, and then install the beam on which the fixing device of the present invention is installed on the upper part of the preflex beam. As a result, more bridge structures could be installed.

Fifth, additional horizontal support beams are installed to expand the upper part, which can be called a coping part of the substructure, or the beams provided with the fixing device of the present invention, which are connected by using a tension member, are connected to each other, resulting in a long distance. The bridge structure can be installed.

BRIEF DESCRIPTION OF DRAWINGS To describe the present invention more clearly and easily, the following describes the best embodiments of the present invention in detail with reference to the accompanying drawings, and embodiments according to the present invention may be modified in various other forms, and thus the scope of the present invention. Is not limited to the embodiment described below.

Prestressing tension device 100 of the present invention includes a sliding portion 110 formed on both ends of the beam; A tension reset member (120) including a fixing device (123) mounted on both sides as a member formed in a U shape to surround both ends of the beam while being in contact with the sliding part; And an intermediate support member 140 protrudingly mounted on the abdominal surface of the beam, the horizontal support hole having a horizontal through-hole formed therebetween so that the tension member 130, which is fixed after tension between the fixing devices, can be inserted through the abdomen of the beam. It is configured by.

2a shows a state in which the sliding part 110, the tension reset member 120, the tension member 130, and the intermediate support member 140 are installed in the I-beam.

The sliding part 110, the tension reset member 120, the tension member 130 and the intermediate support member 140 is installed in the abdomen of the I-beam without being installed on the lower flange surface of the I-beam and the beam height and It will not affect the communication surface limitation.

The sliding part 110 serves as a kind of sliding plate formed to be inclined downward inward to the end of the I-beam. The sliding unit 110 may be formed by attaching a separate downward slope portion to an end surface of the I-shaped steel having a normal vertical surface, but preferably by cutting the end portion of the I-beam inclined downward as shown in FIG. 2B. Form naturally. Furthermore, it is preferable to adjust the tension reset member so that it has an inclination angle that does not slide by its weight, but can be easily slid by a tension force applied to the tension member.

Sliding plate 111 is further attached as shown in FIG. In other words, while the contact member 121 of the tension reset member 120 is in contact with the sliding plate 111 to be reliably slid, the cutting plate is manufactured by cutting to a size corresponding to the end area so that the sliding plate can also act as an end reinforcing plate Attach to the side. At this time, the stress reinforcing plate 112 may be further installed between the sliding plate and the cut end of the I-shaped steel by a square or triangular plate material, and the sliding plate may be installed by welding the steel plate, but may be attached with an FRP plate that can be attached with an adhesive. It does not matter.

In the case of a beam such as a PSC beam that is not an I-beam, the end may be cut in forming the sliding part 110, but the end shape may be formed in advance so that the sliding part inclined downward is formed in advance from the beam fabrication. At this time, it may be used as a sliding section as it is formed to be inclined downward, but may be attached to the sliding plate additionally.

The tension restraining member 120 of the present invention is a configuration in which the prestress is introduced into the beam by the tension member 130 installed while sliding down the inclined beam end while being in contact with the sliding part 110, which will be described with reference to FIG. 2D. .

The U-shaped tension fixing member 120 is formed in contact with the sliding plate 111 of the sliding portion of the beam or the end of the I-beam (hereinafter referred to as the beam end), and has a height at least smaller than the height of the sliding portion or the sliding plate. A contact member 121 formed to be; And a side member 122 extending toward the abdomen of the beam or the I-beam at both side ends of the contact member and having a fixing member 123 for tension material installed on an outer surface thereof.

The tension reset member 120 is manufactured in a U-shape while surrounding the beam end while contacting the sliding part 110. The part in contact with the sliding part may be formed of a square plate as the contact member 121. The contact member has a width enough to be accommodated in the sliding portion, the height is formed smaller than the vertical height of the beam end is manufactured to enable the up and down sliding according to the introduction of the tension material. It is usually produced using a steel sheet, but may be made of other materials including an FRP member.

Both side surfaces of the contact member are bent from the beam end to form a side member 122 is protrudingly extended and a fixing device 123 is provided on the outer surface of the tension material is tensioned, fixed. The side member 122 and the contact member 121 is integrally manufactured at the time of manufacture and installed in a manner that is inserted into the beam end.

That is, the tension restoring member 120 of the present invention can be tension-fixed while the tension member is installed in the acupressure support method in that it supports the tension force by the tension of the tension member at the end of the beam while being tension-fixed in the conventional fixing member. As described above, the beam drilling process, the bolt installation process, and the like for fixing the fixing member to the end of the beam can be omitted, so there is an advantage in terms of workability.

The fixing device 123 includes a fixing means including a conventional configuration that allows the tension member 130 to be fixed at one end and is tensioned by the tension means including the hydraulic device at the other end and then fixed by the fixing device.

At this time, so that the tension reset member 120 can be vertically slid along the sliding portion 110 to form a sliding control panel 150 protruding horizontally in the upper and lower portions of the sliding portion exactly as shown in Figures 2a and 2c. The tension reset member 120 may be prevented from being separated from the beam end.

2e illustrates a state in which the tension member 130 is installed in the sliding unit 110 and the tension reset device 120 of the present invention. The tension reset device 120 is temporarily fixed to the upper end of the sliding part 110. At this time, the member for supporting the tension member 130 in the middle to install the tension member 130 over the abdomen of the beam is the intermediate support member 140 of the present invention.

The intermediate support member 140 is formed to protrude perpendicularly to the abdominal surface of the beam or I-beam and the vertical plate member 141 having a horizontal through-hole 142 formed at the bottom thereof; And upper and lower horizontal plates 143a and 143b for fixing the vertical plate 141 between the flanges of the beam or the I-beam.

2F and 2G are excerpts and side views of a state in which the intermediate support member 140 is installed at the center of the beam.

The vertical plate 141 is formed to protrude up to a portion where the flange of the beam extends perpendicularly to the beam abdomen, and a horizontal through hole 142 is formed at the lower end thereof. The tension member 130 is inserted into the horizontal through-hole 142 to serve as a support for the tension member to be tension-fixed in the abdomen of the beam.

The reason why the horizontal through hole 142 is formed at the lower end is to allow the required compression prestress to be introduced into the lower flange portion of the beam. The vertical plate may be fixed to the beam abdomen by welding or the like, and it may be used with a bolt.

Means for extending and fixing the vertical plate 141 to the inner surface of the upper and lower flanges of the beam are the upper and lower horizontal plate members 143a and 143b. It may be formed integrally with the vertical plate material, and the force acting on the vertical plate material is also distributed to the entire beam through the upper and lower horizontal plate materials (143a, 143b).

In addition, the upper and lower horizontal plates 143a and 143b may be welded to the inner surface of the flange part, but the upper and lower backing plates 144a and 144b may be used to fix the bolts through the outer surface of the upper and lower flanges. It doesn't matter.

Furthermore, by further installing the inclined support plate member 145 connecting the vertical plate member 141 from the upper and lower horizontal plate members 143a and 143b, the warp of the beam is not generated by the prestress introduced by the tension member.

That is, the intermediate support member 140 is installed on the beam abdomen surface and has a role of preventing warpage due to prestress introduced while supporting the tension member.

The tension member is inserted through the horizontal through-hole 142, but the contact portion with the horizontal through-hole by the tensile force may be concentrated stress. The cylindrical buffer member of a steel or plastic material (not shown) corresponding to the diameter and thickness of the horizontal through hole may be further formed to prevent the tension member from directly contacting the horizontal through hole.

3A to 3D show an operation state diagram in which prestress is introduced into a structural beam in which the prestressing tension device 100 of the present invention is installed.

As shown in Figure 3a, to install the prestressing tension device 100 of the present invention on the beam 200, the initial position of the tension reset member 120 to be temporarily fixed on both ends of the beam, the tension material ( 130 is mounted to be fixed, fixed to the fixing device 123 of the tension reset member 120. At this time, the tension member 130 is to be installed through the horizontal through-hole 142 of the intermediate support member 140 installed on the abdominal surface of the beam so that it can be installed primarily in a parabolic form.

As shown in FIG. 3B, when the tension member 130 is tensioned on both sides, the tension fixing member 120 is slid downward along the sliding part 110 to a position where the tension member in the form of a parabola is stretched downward.

The advantage of the tensioning method is that the tension member slides in a straight line from the parabolic shape as above. The tension tension fixing device is installed from the horizontal through hole because the central part of the tension material is supported by the horizontal through hole when the tension force is first introduced into the parabolic shape. The tension force acts on the separation distance (eccentric distance) to the position, so that the tension force due to the bending moment can be introduced, and the tension member can be tensioned with less tension force, which is mechanically efficient.

Therefore, initially, the tension prestress is introduced into the beam when the tension member is fixed in one end while the tension restraint member is kept horizontally stretched while the tension member is tensioned with a small tension force.

The beam is raised to bend upward by the introduced prestress, especially if it is an I-beam, so that the beam functions as a preflex beam. If the beam is a concrete beam such as a PSC beam, it does not function as a preflex beam, but external prestressing. Function as a device.

3C shows a state in which the upper load is applied to a predetermined raised beam when the beam is curved in I-beam, and the pre-stress is operated as a stable beam until the bending moment caused by the load is canceled. Done.

Figure 3d shows the moment immediately before the intermediate support member 140 is pushed downward in the horizontal tension member 130 when the bending moment due to the loading load to the extent to offset the pre-stress introduced, the tension member is downward After pushing, the upward force due to the reaction force is introduced back into the beam. Thus, the beam provided with the prestressing tensioning device of the present invention can be additionally provided with the advantage that it can function as a stable beam even if a greater load load is applied than the preflex beam.

The installation structure 300 of the structural beam is installed in the prestressing tension device of the present invention includes a pillar member 310 including a temporary vent; A beam support member 320 having a center portion fixed to the upper portion of the pillar member and formed to be bent upwardly so that both ends thereof are spaced apart from each other; And structural beams 330a and 330b which are continuously installed in the beam installation direction on the beam support member.

4A, 4B and 4C show a partial front view, a mounting front view and a side view including the structural beam of the present invention.

Technical features of the installation structure of the present invention is in the beam support member (320). That is, the beam supporting member is Y-shaped, and both ends are spaced apart to form a supporting distance, so that two branch portions are formed in one beam supporting member, thereby shortening the overall length of the beam 330b installed between the branch portions. There is an advantage. Therefore, there is a relatively long span effect.

The pillar member 310 may include both a truss structure and a concrete pillar as a lower structure of the bridge, in the present invention based on the square or circular truss structure.

As the beam support member 320, a preflex beam manufactured by bending upwards may be used, and the connection shape of the beam support member together with the pillar member is formed in a Y-shape as a whole. L1) is formed.

Between the point portions of the beam support member 320, various types of beams 330a including the beam of the present invention having the corresponding length are installed, and the tension for introducing the prestress of the present invention between the point portions of the pillar members. The structural beam 330b is installed.

Thus, when the normal pillar member 310 is installed, the beam having the full length between the pillar shaft center axes should be installed, but in the present invention, the beam having the full length between the outside of the point portion of the beam supporting member can be installed. Since the overall length of the beam to be installed can be shortened, it is possible to construct bridges between longer and longer places.

Another installation structure 400 of the structural beam is installed prestressing tension device of the present invention is a pillar member 410 including a temporary vent; A beam supporting member 420 formed as a horizontal member having a central portion fixed to an upper portion of the pillar member and supported by an inclined member 440 hypothesized from the pillar member, and having a support distance corresponding to distances at both ends thereof; And structural beams 430a and 430b which are continuously installed in the beam installation direction on the beam support member.

5A is a partial front view of the other installation structure.

Compared with FIG. 4A, the different point is formed in a Y-shape as a whole, and uses an ordinary horizontal beam supporting member 420 without using the beam supporting member 320, but the inclined member supported from the upper lower end of the pillar member 410. Install 440 additionally.

That is, the Y-shaped beam support member 320 is installed in anticipation of acting as a preflex beam, but if it is necessary to consider the fabrication and economics of such a beam support member, the beam support member is a conventional I-shaped steel beam. By using the Y-shaped both ends of the gap is spaced apart as a configuration having the same technical effect that the support distance is formed is to install an additional inclined member 440.

On the beam supporting member 420, various types of beams 430a including the beam of the present invention having a full length corresponding to the beam supporting member are installed, and the prestress for introducing the present invention is provided between the branch portions of the pillar members. It is to install the structural beam 430b is installed tension device.

Another installation structure 500 of the structural beam is installed prestressing tension device of the present invention is a pillar member 510 including a temporary vent; Structural beams (530a, 530b) are continuously installed on the pillar member; In the connection portion of the structural beam

An upper tension member 520b installed after tension through the connection portion via the upper portion of the beam over the entire length of the structural beam; And

A lower tension member 520a installed at a lower portion of the beam via a connection portion of the structural beam;

The tension member 520 including the structure is further installed after the tension.

That is, unlike FIG. 4A and FIG. 5, the additional tension member 520 is installed in the beam without using the beam supporting members 320 and 420.

The tension member is divided into an upper tension member 520b and a lower tension member 520a respectively installed on the upper and lower portions of the structural beams 530a and 530b.

The upper tension member 520b is installed after the tensioning operation when installed over the upper length of the structural beam via the connection portion of the structural beam. In this case, prestress may be additionally introduced into the structural beams, thereby enabling the installation of the structural beams between the long and long positions.

At this time, it is to be installed after the tension by the fixing device spaced apart from the connecting portion through the lower tension member 520a only through the connecting portion so as to resist the tensile stress that may occur in the lower portion of the structural beam.

On the pillar member 510, structural beams 530a and 530b provided with the prestressing tension device of the present invention are installed.

The installation method of the structural beam is installed in the prestressing tension device of the present invention is installed the prestressing tension device of the present invention including a sliding portion 110, the tension reset member 120 and the intermediate support member 130 ( Compression prestress is introduced into the lower structure to install on the lower structure, wherein a tension member is installed in the abdomen form on the beam abdomen between the tension restraint members positioned at both ends of the beam, and the tension member is installed on the abdomen of the beam. Inserting both ends to the tension reset member while being inserted into the horizontal through hole of (s1); And tensioning the tension member to introduce a compression prestress into the beam while the tension reset member is slid downward along the sliding part and the beam is curved upward while the tension member in the form of a parabolic is stretched horizontally (s2).

First, the production beam 200 is installed in the factory or near the site of the prestressing tension device of the present invention is installed.

In the case of I-shaped steel, the tension reset device is temporarily placed at the upper end of the sliding parts formed at both ends, and then, one end of the tension material is fixed to the tension reset device, and the parabolic shape is installed in the center of the beam through the beam abdomen. After passing through the horizontal through-hole, attach the other end to the tension reset device.

After the tension member is mounted, the tension member is tensioned to apply a tensile force (P). As the tension force is applied, the tension reset device together with the tension member slides in a downwardly inclined direction along the sliding part of the beam, and finally the tension member is horizontally stretched. Until the required prestress is introduced, the tensile force may be applied by adjusting the number of times and the size at least once.

The structural beam 200 is installed directly on the pillar member or the beam support member is first installed, and then the beam 200 in which the prestress is introduced is finally installed. The prestress may be introduced after the pillar member is first installed. have.

After installing the structural beam 200, after installing a perforated plate, a slab, etc. according to the purpose is to dismantle the pillar member or pillar member and the beam support member. If the column member or beam support member is constructed as a permanent structure, no separate dismantling work is required.

By efficiently introducing the required prestress from the outside by the structural beam of the present invention, it is possible to quickly, economically and stably construct a bridge including bridges.

Claims (11)

Sliding parts formed at both ends of the beam; A tension reset member including a fixing device mounted on both sides as a member formed in a U shape to surround both ends of the beam while being in contact with the sliding part; And an intermediate support member protrudingly mounted on the abdominal surface of the beam, the horizontal support hole having a horizontal through-hole formed therebetween so that the tension member, which is fixed after tension between the fixing devices, can be inserted through the abdomen of the beam. The beam is an I-beam, and the sliding portion is formed by fixing a sliding plate of a size corresponding to the end area of the I-beam in contact with the sliding surface formed by end processing the both ends of the I-beam inclined downward, The sliding control plate for further protruding horizontally to the upper and lower portions of the sliding plate for controlling the sliding of the tension reset member is further formed, Pre-stressing tension device, characterized in that the cylindrical buffer member is further installed in the horizontal through-hole of the intermediate support member. delete delete delete delete According to claim 1, wherein the c-shaped tension reset member A contact member formed in contact with the sliding plate of the beam or the sliding plate at the end of the I-beam, the contact member being formed to have a height at least smaller than the height of the sliding part or the sliding plate; And Side members extending toward the abdomen of the beam or the I-beam at both side ends of the contact member and having a fixing member for tension member installed on an outer surface thereof; Prestressing tension device, characterized in that comprising a. The method of claim 1 or 6, wherein the intermediate support member A vertical plate protruding perpendicular to the abdominal surface of the beam or I-beam and having a horizontal through-hole formed at the bottom thereof; And Prestressing tension device comprising a; upper and lower horizontal plate for fixing the vertical plate between the flange of the beam or I-shaped steel. Pillar member including a temporary vent; A beam support member having a central portion fixed to the upper part of the pillar member and formed to be bent upwardly so that both ends are spaced apart from each other to form a support distance; And a structural beam which is continuously installed on the beam support member in a beam installation direction, wherein the structural beam includes at least A sliding part formed of a sliding plate having a size corresponding to an end area in contact with a sliding surface formed by end treatment of both ends being inclined downward; A tension reset member formed in contact with the sliding part and including a contact member formed to have a height smaller than at least the vertical height of the sliding part, and a side member extending at both side ends of the contact member and having a fixing member for tension member installed on an outer surface thereof; An intermediate support member including upper and lower horizontal plates formed to protrude perpendicularly to the abdominal surface and for fixing between the flanges a vertical plate having horizontal through holes formed thereon; And And a tension member provided at both ends of the intermediate support member in the horizontal through-hole of the intermediate support member along the abdominal surface of the beam. The tension member is installed at the fixing member. . Pillar member including a temporary vent; A beam support member having a center portion fixed to an upper portion of the pillar member and supported by an inclined member hypothesized from the pillar member, and having a support distance corresponding to distances at both ends thereof; And a structural beam which is continuously installed on the beam support member in a beam installation direction, wherein the structural beam includes at least A sliding part formed of a sliding plate having a size corresponding to an end area in contact with a sliding surface formed by end treatment of both ends being inclined downward; A tension reset member formed in contact with the sliding part and including a contact member formed to have a height smaller than at least the vertical height of the sliding part, and a side member extending at both side ends of the contact member and having a fixing member for tension member installed on an outer surface thereof; An intermediate support member including upper and lower horizontal plates formed to protrude perpendicularly to the abdominal surface and for fixing between the flanges a vertical plate having horizontal through holes formed thereon; And And a tension member provided at both ends of the intermediate support member in the horizontal through-hole of the intermediate support member along the abdominal surface of the beam. The tension member is installed at the fixing member. . Pillar member including a temporary vent; A structural beam is installed continuously on the pillar member; In the connecting portion of the structural beam through the upper portion of the beam via the upper portion of the structural beam over the entire length of the structural beam, the upper tension member installed; And a lower tension member installed at a lower portion of the beam via a connection portion of the structural beam. The tension member including a further is installed after the tension, the structural beam, a sliding portion consisting of a sliding plate of a size corresponding to the end area in contact with the sliding surface formed by end treatment at least inclined to both ends downward; A tension reset member formed in contact with the sliding part and including a contact member formed to have a height smaller than at least the vertical height of the sliding part, and a side member extending at both side ends of the contact member and having a fixing member for tension member installed on an outer surface thereof; An intermediate support member including an upper and a lower horizontal plate formed to protrude perpendicularly to the abdominal surface and to fix the vertical plate formed at the bottom with horizontal through-holes between the flanges; And And a tension member provided at both ends of the intermediate support member in the horizontal through-hole of the intermediate support member along the abdominal surface of the beam. The tension member is installed at the fixing member. . In a method of introducing a compression prestress into a beam provided with a tension device for introducing a prestress including a sliding portion, a tension restraint member and an intermediate support member, and installing the compression prestress on a lower structure, the introduction of the compression prestress may be performed. A tension member is installed in the beam abdomen in a parabolic form between the tension reset members positioned at both ends of the beam, and the tension member is inserted into the horizontal through hole of the intermediate support member installed in the abdomen of the beam, thereby mounting both ends to the tension reset member. step; And Tensioning the tension member to introduce a compression prestress into the beam while the tension reset member is slid downward along the sliding part so that the parabolic tension member is horizontally curved while the beam is curved upward; Installation method of the beam is installed tension device for pre-stress introduction, characterized in that it comprises a.

Images