JPS62182350A - Structure of fold part of pc steel material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to the structure of a break point portion of a PCg material integrally disposed along a steel frame of a steel frame structure.

``Prior art'' In general, as the scale of steel structures increases, large amounts of flexure occur in steel structures, and the design is designed to have enough strength to withstand this flexure. The problem was that the construction costs were high and it was uneconomical.

Therefore, in view of the above-mentioned problems, the applicant integrally installed PC along at least one member of the truss material assembled with chord materials and radius materials. 2] First, we proposed a truss-type steel structure in which materials are arranged.

FIG. 4 is a diagram showing a truss beam to which this truss type steel structure is applied. In Fig. 4, reference numeral 1 indicates a truss beam in the case of a steel structure constructed between two opposing architectural structures (fulcrums) 2°2, and this steel structure l is a steel pipe A truss structure is constructed of an upper chord member 3 made of a steel plate, a lower chord member 4 made of an I4 section steel, and a lattice member 5 made of a steel pipe that connects the upper chord member 3 and the lower chord member 4. There is one point on the top chord 3, and two places on the bottom chord 4, at the break point 6.6. ...or has been installed. For the lower chord material 4,
This is done so that prestress is introduced into the steel structure l by tensioning the PCG material 7 to counter the compression or tensile force generated in the lower chord member 4 based on the stress state of the steel structure 1. A PC steel material 7 is integrally arranged along the lower chord member 4.

The PC steel material 7 is constructed by a sheath pipe 8 that is integrally attached to the lower chord material 4 and a PC tuning wire 9 passing through it.

This truss beam l has a lower chord member 3, a lower chord member 4, and a 5th lattice i.
After assembly is completed by connecting each other, and finishing materials and other equipment necessary for functionality are installed, p.
(The truss beam 1 is tensioned and its both ends are fixed to both ends of the lower chord member 4, completing the construction of the truss beam 1 as a whole. As a result, this truss beam 1 has a PCjlli
A compressive force is applied by the material 7 and a prestress is introduced.

The truss beam I constructed as described above can be constructed by introducing prestress with an appropriate compressive force to the lower chord member 4 using the prestressed steel material 7 in advance, so that when the truss beam 1 is completed, the stress generated in the lower chord member 4 can be reduced. It is possible to at least relieve or cancel out the tensile forces that occur. Therefore, the deflection of the truss beam (steel frame structure) 1 can be reduced, and the stress of the lower chord member 4 can be reduced in design by the tensile force carried by PCBClO2, allowing for economical horizontal construction. It is.

Here, the truss beam (steel structure) 1 has its lower chord member 4.
Since there are two bending points 6 and 6, it is necessary to bend the PC steel material 7 by a predetermined angle at these bending points 6 and 6 and attach it to the lower chord member 4. In this case, just PC
If a method of simply bending the steel material 7 and fixing it directly to the lower chord material 4 was adopted, wiring work for the PC steel material 7 would be difficult, and the tension introduced into the PC steel material 7 when the PCjll material 7 was tensioned would be difficult. As a result, all of the PCM material 7 is concentrated and transmitted to the part where the PCM material 7 is fixed to the lower chord member 4, and as a result, this fixed part may be damaged. Therefore, the structure of the PCBClO2 point part needs to be such that the PC steel material 7 is movable relative to the lower chord member 4 in its axial direction.

FIG. 5 is a diagram showing the structure of the bending point of the PCM material 7, in which the PCR material 7 is movable relative to the lower chord material 4 in its axial direction. In FIG. 5, at the bending point 6 of the lower chord member 4,
A guide vibe IO having a larger diameter than the PC steel material 7 is provided so as to cover the PC steel material 7. The guide vibe 10 is bent along the lower chord member 4 at the fourth bending point 5 of the lower chord, and is attached to the fourth lower chord by a rib plate II arranged at the bending point 5.

After the truss beam (steel frame structure) is completed, the PC steel material 7 having the above-mentioned break point structure is free to move in the guide vibe 10 in its axial direction when both ends are tensioned by appropriate means such as jacks. Since the bending point part can be moved to the position shown in FIG.

"Problems to be Solved by the Invention" By the way, in the structure of the break point part of the PC steel material 7, it is provided for the purpose of configuring the PC steel material 7 to be movable relative to the lower chord member 4 in its axial direction. The guide vibe 10 is attached to the lower chord member 4 and bent at the bending point 6, so the PC
During steel-off wiring, tension, or vibration after the truss beam (steel frame structure) is completed, the sheath tube 8 of the PCM material 7 slides and moves over the internal break point of the guide vibe lO. I end up. Therefore, there was a risk that the sheath tube 8 would be damaged by the guide vibe 10. Furthermore, the prestress introduced by the PCI material 7 is transmitted to the truss beam l via the internal bending point of the guide vibe 10 and the rib plate 11, so that the rib plate! Prestress was concentrated near 1, and there was a risk that the bending point 6 of the lower chord material 1 would be damaged.

This invention prevents damage to the PCM material and alleviates the concentration of prestress on a portion of the steel frame in a structure of a bending point of a PC steel material in which a steel frame +1 is integrally arranged along a continuous steel frame. The problem is how to realize the structure of the bending point of P Cj14Lt.

"Means for Solving the Problems" The present invention provides a structure for a bending point of a prestressing steel material integrally arranged along a steel frame of a steel frame structure. The above problem is solved by providing a guide vibe that is curved along the point and having a larger diameter than the PC steel material, and attaching the guide vibe to the steel frame using a plurality of support members.

"Function" In this invention, the prestressed steel material slides on the inner surface of the curved guide vibe, and this guide vibe is attached to the steel frame by a plurality of supporting members, so the prestress introduced by the prestressed steel material is dispersed. is transmitted to the steel frame.

"Actual Sparrow Example" Hereinafter, embodiments of the present invention will be described with reference to the drawings.

FIGS. 1 and 2 are diagrams showing the structure of a bending point of a PCjIal material, which is a first embodiment of the present invention. In FIGS. 1 and 2, reference numeral 12 indicates a break point of the prestressed steel material 7, and the break point 12 of the prestressed steel material 7 has a structure similar to that of a truss beam in the case of the conventional steel structure described above. It is applied to the break point 6 of the steel structure l having . Therefore, the same components are given the same reference numerals and their explanations will be omitted.

The corner portion 12 of the PC steel material 7 is provided so as to cover the PC steel material 7 integrally arranged along the lower chord 4 of the truss beam 1 and the corner portion 12 of this PC steel material 7, and Point part 12
a guide vibe 13 curved along the rib plate 14 that attaches the guide vibe 13 to the lower chord member 4.
15. It is composed of... As a result, P
The C steel member 7 is configured to be movable relative to the lower chord member 4 in its axial direction.

The truss beam (steel structure) l in this example is made by the method shown below.

First, like the conventional truss beam, the upper chord member 3 and the rib plates 14, 15. ...and the lower chord member 4 to which the guide vibe 13 is attached in advance and the fifth ratchet are connected to each other to assemble the truss beam l. Next, PCjli
The member 7 is arranged along the lower chord member 4, and is arranged so as to penetrate the guide vibe 13 at the bending point 6 of the lower chord member 4.

Furthermore, after installing finishing materials and other equipment necessary for functionality, PCj! Both ends of the four wires 9 are tensioned by appropriate means such as jacks to introduce a predetermined tension into the PC steel wire 9, and then the PC steel wire 9 is fixed to both ends of the lower chord member 4.

As a result, similar to the conventional truss beam described above, compressive force is applied to the truss beam 1 in advance by the PC steel material 7, and prestress is introduced.

By the method described above, a truss beam l in which the PCI material 7 is integrally arranged along the lower chord member 4 is manufactured. Here, P
Breaking point of C steel material 7! 2, the PCM material 7 is disposed along the inner surface of the curved guide vibe 13.

Therefore, even if the sheath pipe 8 of the prestressed steel material 7 moves near the break point 12 during the installation and tension of the prestressed steel material 7, or vibration after the truss beam (steel structure) l is completed, this sheath tube 8
Since the guide vibrator 13 slides on the curved inner surface of the guide vibe 13, there is little possibility that the sheath tube 8 will be damaged.

Further, the guide vibe 13 includes a plurality of sliding plates +4.
15. Since it is attached to the lower chord member 4 by ..., the prestress introduced by the PC steel material 7 is dispersed and transmitted to the lower chord member 4, so there is less risk of the break point 6 of the lower chord member 4 being damaged. .

In addition, the sheath tube 8 and guide vibe 1 of the PCjll material 7
It is conceivable to provide a friction-reducing material between the source tube 8 and the guide vibe 13 in order to improve the sliding surface of the guide vibrator 3. Examples of this friction reducing material include one in which a lubricant such as grease is filled between the sheath tube 8 and the guide vibe I3.

Another example is one in which the inner surface of the guide vibe 13 is treated with a self-lubricating resin such as polytetrafluoroethylene. Constructed in this way, PC steel material 7
The bending point 12 allows the PCJQ material 7 to slide more smoothly on the inner surface of the guide pipe 13 when the PCJ material 7 is placed, tensioned, or vibrates after the truss beam 1 is completed.
Damage to the sheath tube 8 can be further prevented.

Next, FIG. 3 shows a PCR method according to a second embodiment of the present invention.
It is a figure showing the structure of the breaking point part of material. In the embodiment described below, the same components as in the first embodiment are denoted by the same reference numerals, and the explanation thereof will be omitted. The difference between the structure of the bending point I2 of the PC steel material 7 and the structure of the bending point 12 of the first embodiment is that a fixing material is used between the guide pipe 13 and the lower chord member 4, that is, concrete is used here. 16 has been filled and cast.

The breaking point of this PC steel material 7! The truss beam (steel frame structure) (2) to which structure 2 is applied is made by the same method as the truss beam in the first embodiment, and prestress is similarly introduced. Here, at the bending point 12 of the PC steel material 7, the guide pipe (3) is located at the rib plate +4.15.
Since it is fixed to the lower chord member 4 by the concrete 16, the prestress introduced by the P (44 member 7) is applied to the lower chord member 4 by the rib plates 14, 15... Furthermore, since the light is transmitted in a dispersed manner over a wider area, breakage of the bending point 6 of the lower chord member 4 can be further prevented.

Note that the structure of the bending point portion of the PC steel material according to the present invention is not limited to the above embodiment. For example, although the break point portion of the pcRH in the above embodiment is provided only on the lower chord member of the truss beam, it may be provided on the upper chord member or on both of these. In addition, as for the PC steel material, it is better to use a PCR material such as P (44 stranded wire) instead of the PC steel wire, and fill the space between the sheath pipe and the PCA wire or PC!4 stranded wire with anti-corrosion and lubricant. A so-called unbonded PC steel material may be used.Furthermore, the friction reducing material is not limited to the above embodiments, and any material that can reduce the friction on the sliding surface between the PC steel material and the guide pipe may be used.Fixed. Similarly, the material is not limited to the above-described embodiments, and any material may be used as long as the guide pipe is fixed to the steel frame.

In this embodiment, a trussed beam has been described as an example of a steel structure, but the above steel structure is not limited to this, and can also be applied to a truss type steel structure having a rigid frame structure or an arch structure. can. Furthermore, the above-mentioned steel frame structure is not limited to a steel frame structure having a truss structure, and conventional general structures can also be applied.

"Effects of the Invention" As explained in detail above, according to the present invention, PCs are integrally arranged along the steel frame of a steel structure! ! In the structure of the bending point of the L material, a guide pipe having a larger diameter than the PCR material is provided so as to cover the bending point of the PCKj4 material, and the guide pipe is curved along the bending point, Furthermore, since the guide pipe is attached to the steel frame by a plurality of support members, the prestressing steel material can be attached to the steel frame so as to be movable relative to the steel frame in the axial direction, and the arrangement, tension, and Since the PCR material slides and moves on the inner surface of the curved guide pipe when the steel structure is vibrated after completion, there is little risk that the PCR material will be damaged at the bending point.

In addition, since the guide pipe is attached to the steel frame by multiple support members, the prestress introduced into the Pf44 material is dispersed and transmitted to the steel frame, so there is a risk that the break point of the steel frame will be damaged. few.

Furthermore, when a friction reducing material is provided between the PC steel material and the guide pipe, it reduces the friction on the sliding surface between the PC@p and the guide pipe, which further prevents damage at the bending point of the PC steel material. can do. When a fixing material is provided between the guide pipe and the steel frame, the prestress introduced by the prestressing steel material is distributed over a wider area and transmitted to the steel frame, which further prevents damage at the break points of the steel frame. be able to.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the structure of the bending point of the PCrl material according to the first embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA' in FIG.
A line cross-sectional view, FIG. 3 is a PC which is a second embodiment of the present invention.
FIG. 4 is a cross-sectional view showing the structure of the bending point of the G material, FIG. 4 is a front view showing a truss rod to which the bending point of an embodiment of the present invention and a conventional PC steel material are applied, and FIG. 5 is a cross-sectional view of a conventional PC steel FIG. 3 is a cross-sectional view showing the structure of a +4 corner portion. 1...Truss wire (steel frame structure) 1.1...Lower chord material (steel frame), 7...PC steel material, 12...Break point, 13...Guide vibe , 14.15...
Rib plate (supporting member), 16... concrete (fixing material).

Claims (6)

[Claims] (1) PC installed integrally along the steel frame of a steel frame structure
A structure of a bending point of a steel material, wherein a guide pipe having a larger diameter than the prestressing steel material is provided so as to cover the bending point of the prestressing steel material, and the guide pipe is curved along the bending point. . A structure of a bending point of a prestressed steel material, further comprising the guide pipe attached to the steel frame by a plurality of supporting members. (2) Claim 1, characterized in that a friction reducing material is provided between the PC steel material and the guide pipe.
Structure of the bending point of the PC steel material described in Section 2. (3) The structure of a bending point portion of a PC steel material according to claim 2, wherein the friction reducing material is a lubricant. (4) The structure of a bending point portion of a PC steel material according to claim 2, wherein the friction reducing material is a resin material. (5) The structure of a break point portion of a prestressed steel material according to claim 1, wherein a fixing member is provided between the guide pipe and the steel frame. (6) The structure of a bending point portion of a prestressed steel material according to claim 5, wherein the fixing material is concrete.