Joint structure of steel materials used in steel-concrete composite structures

Abstract

To eliminate a labor of processing and improve the adhesion performance between steel materials and concrete, and to omit a processing labor and work labor in joining steel materials.SOLUTION: As a core material of a steel-concrete composite structure 1, a striped H-section steel 2 having a projection 6 of a predetermined pattern on the outer surface of a flange 4 is used. An outer surface side splicing plate 10 and an inner surface side splicing plate 11 are provided on the outer surface and the inner surface of the flange 4 straddling the joint end of the striped H-section steel 2, respectively, and also an easily deformable plate 12 is arranged between the outer surface side splicing plate 10 and the outer surface of the flange 4 of the striped H-section steel 2. The outer surface side splicing plate 10, the easily deformable plate 12, the flange 4 of the striped H-section steel 2, and the inner surface side splicing plate 11 are integrally fastened with bolts. The easily deformable plate 12 is deformed according to the pattern of the projection 6 formed on the outer surface of the flange 4 of the striped H-section steel 2.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a steel-concrete composite structure using a corrugated H-shaped steel with protrusions of a predetermined pattern formed on the outer surface of the flange as a core material, and a joining structure of steel materials used therefor.

Background Art

[0002] Conventionally, in a steel-concrete composite structure, when using an H-shaped steel as a core material, in order to enhance the adhesion performance with the concrete filled around it, it has been proposed to perform various processes on the H-shaped steel.

[0003] For example, Patent Document 1 below discloses a profiled H-shaped steel provided with a plurality of protrusions on both the outer surface of the flange and both surfaces of the web, and Patent Document 2 below discloses a shaped steel having a plurality of protrusions on the inner surface side.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] Since the H-shaped steels described in Patent Documents 1 and 2 above are provided with a plurality of protrusions on the outer surface of the flange, both surfaces of the web, or the inner surface of the flange, sufficient adhesion can be obtained between the steel material and the concrete by the engagement between the protrusions formed on the H-shaped steel and the concrete.

[0006] However, since the protrusions are provided by rolling or welding, in the case of rolling, the processing cost of rolling the ready-made H-shaped steel increases. In the case of welding, it takes a great deal of labor to weld the protrusions one by one to the long H-shaped steel, resulting in a problem of increased production cost.

[0007] Also, as a joining structure for connecting conventional H-shaped steels, a structure is used in which attaching plates are provided on both surfaces of the flange and the web, and these attaching plates and the H-shaped steel are integrally fastened with high-strength bolts. However, when using the H-shaped steel with the protrusions, since the contact between the attaching plate and the H-shaped steel is only at the tip of the protrusion, there is a problem that the frictional force between the H-shaped steel and the attaching plate becomes extremely small. For this reason, generally, measures are taken to increase the frictional force, such as (1) removing the protrusions in the range where the attaching plate is to be attached to flatten the outer surface of the H-shaped steel, and (2) making the attaching plate larger than usual to increase the contact area between the attaching plate and the tip of the protrusion, and increasing the number of high-strength bolts to increase the tightening force.

[0008] However, in the measure (1) above, there is a problem that it takes time to process the H-shaped steel for removing the protrusions, and in the measure (2) above, the number of bolts to be tightened increases, resulting in a problem that the on-site work takes time.

[0009] Therefore, the present invention Problems The problem is to provide a joining structure of steel materials used in a steel-concrete composite structure that omits the processing labor and work labor in the joining of steel materials.

Means for Solving the Problems

[0010] In order to solve the above problems, the present invention according to claim 1 A steel material joining structure used in a steel-concrete composite structure, In the steel-concrete composite structure Steel material As such, a striped H-shaped steel having protrusions in a predetermined pattern on the outer surface of the flange is used and On both sides of the web of one of the corrugated H-sections, connecting plates parallel to the web are provided in a state of protruding from the joint end face, On both sides of the web of the other corrugated H-section, two transmission plates are arranged with a separation width into which the connecting plate can be inserted, thereby forming a slit portion that opens toward the joint end face, A steel material joining structure used in a steel-concrete composite structure, characterized in that with the connecting plate inserted into the slit portion, the transmission plates and connecting plates arranged on both sides of the web and the web of the corrugated H-section are integrally fastened with bolts is provided.

[0011] In the invention described in claim 1 above, as the steel-concrete composite structure Steel material , a corrugated H-shaped steel with protrusions of a predetermined pattern on the outer surface of the flange is used. The corrugated H-shaped steel is mainly used as a road surface covering board, and a plurality of anti-slip protrusions are provided on the outer surface of the flange. Since the protrusions of a predetermined pattern are provided on the outer surface of the flange of the corrugated H-shaped steel in this way, the adhesion performance between the steel material and the concrete can be improved without separately performing processing for providing protrusions for improving the adhesion performance with the concrete.

[0012] The joining structure of the corrugated H-section A connecting plate parallel to the web is provided on both sides of the web of one corrugated H-shaped steel in a state of protruding from the joint end surface, and two transmission plates are arranged on both sides of the web of the other corrugated H-shaped steel with a separation width into which the connecting plate can be inserted, thereby forming a slit portion that opens toward the joint end surface. Then, with the connecting plate inserted into the slit portion, the transmission plates, the connecting plate, and the web arranged on both sides of the web are integrally fastened with bolts. As a result, a joint structure is obtained in which strong connection can be achieved on both sides of the web without arranging an attachment plate on the flange. Also, since no attachment plate, bolt, or nut is arranged on the outer surface of the flange, the steel reinforcement position of the steel material can be set closer to the outside of the concrete structure, which is advantageous in terms of strength.

[0013] As the invention according to claim 2, a joint structure of a steel material used in the steel-concrete composite structure according to claim 1 is provided, in which the pattern of the protrusions of the corrugated H-shaped Steel steel is lattice-shaped along the axial direction and the width direction of the corrugated H-shaped steel.

[0014] In the invention described in claim 2 above, among various patterns of the protrusions of the corrugated H-shaped steel, a lattice-shaped pattern along the axial direction and the width direction of the corrugated H-shaped steel is used from the viewpoint of improving the adhesion performance with the concrete.

Effect of the Invention

[0015] As described in detail above, according to the present inventionSteel It is possible to provide a steel member joining structure used for a steel-concrete composite structure in which the processing labor and work labor in joining members can be omitted.

Brief Description of the Drawings

[0016]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0018] In the steel-concrete composite structure 1 according to the present invention, as shown in FIG. 1, as the core material, striped H-shaped steels 2, 2,... having protrusions 6, 6,... with a predetermined pattern on the outer surface of the flange are used. The steel-concrete composite structure 1 shown in FIG. 1 is a wall body in which a plurality of core materials composed of striped H-shaped steels 2, 2,... are arranged in parallel and concrete 3 is filled on the outer periphery thereof, but it goes without saying that it is also applicable to other steel-concrete composite structures. In addition to the striped H-shaped steel 2, reinforcing bars or the like may be arranged as necessary.

[0019] As shown in Fig. 2, the corrugated H-shaped steel 2 is mainly used as a road surface covering board, and a plurality of anti-slip protrusions 6, 6... are formed on the outer surface of the flange 4 by hot rolling. Such protrusions are not provided on the surfaces other than the outer surface of the flange 4, that is, the inner surface of the flange 4 and both surfaces of the web 5, and they are formed flat.

[0020] The height of the protrusion 6 varies depending on the type of corrugated H-shaped steel, but is usually 1 to 5 mm, and it is preferable to use those with a height of 2 to 3 mm.

[0021] The protrusion 6 is formed over the entire outer surface of the flange 4, that is, over the entire length in the width direction and the axial direction of the outer surface of the flange 4.

[0022] There are various patterns of the protrusion 6 depending on the type of corrugated H-shaped steel, and any pattern can be used. However, as shown in Fig. 2, it is desirable to form a lattice pattern along the axial direction and the width direction of the corrugated H-shaped steel 2. The lattice pattern means that a plurality of protrusions 6 each consisting of ridges linearly extending along the axial direction and the width direction of the corrugated H-shaped steel 2 are arranged at intervals in the width direction and the axial direction. By using a lattice pattern for the pattern of the protrusion 6, a stronger adhesion force with the concrete 3 can be obtained against the shear forces acting in the axial direction and the width direction of the corrugated H-shaped steel 2, and the adhesion performance with the concrete 3 can be further improved.

[0023] The protrusion 6 is preferably provided only on the outer surface of the flange 4 and not formed on the inner surface of the flange 4. That is, it is not preferable to separately provide protrusions on the inner surface of the flange 4 in the range where the attachment plate is provided by rolling, welding, etc., other than the protrusions 6... on the outer surface of the flange 4 formed on the ready-made corrugated H-shaped steel 2. When protrusions are formed on the inner surface of the flange, in the joint structure of the corrugated H-shaped steels 2, 2, the contact area with the attachment plate arranged on the inner surface side of the flange may decrease, and the frictional force may decrease. Therefore, the inner surface of the flange is preferably flat.

[0024] As shown in Fig. 1, when using corrugated H-shaped steels 2, 2... as the core material of the wall body, it is advisable to arrange the flanges 4 to face the wall surface of the wall body and space them apart so that the webs 5, 5 face each other between adjacent corrugated H-shaped steels 2, 2.

[0025] By using a corrugated H-shaped steel 2 provided with protrusions 6... in a predetermined pattern on the outer surface of the flange 4 as the core material of the steel-concrete composite structure 1, there is no need to separately perform a process of providing protrusions for improving the adhesion performance with concrete, and the adhesion performance between the steel material and the concrete can be improved.

[0026] Next, the joining structure between the ends of the corrugated H-shaped steels 2, 2 used in the steel-concrete composite structure 1 will be described.

[0027] ( Reference First means) The first means of the joining structure is, as shown in Fig. 3(A), to provide an outer surface side attaching plate 10 and an inner surface side attaching plate 11 on the outer surface and the inner surface of the flange 4 straddling the joining ends of the corrugated H-shaped steels 2, 2, respectively, and to arrange a deformable plate 12 between the outer surface side attaching plate 10 and the outer surface of the flange 4 of the corrugated H-shaped steel 2. As shown in Fig. 3(B), the outer surface side attaching plate 10, the deformable plate 12, the flange 4 of the corrugated H-shaped steel 2, and the inner surface side attaching plate 11 are integrally fastened with bolts 13, 13... so that the deformable plate 12 is deformed according to the pattern of the protrusions 6, 6... formed on the outer surface of the flange 4 of the corrugated H-shaped steel 2.

[0028] By tightening the bolts 13..., the deformable plate 12 interposed between the outer surface side attaching plate 10 and the flange 4 of the corrugated H-shaped steel 2 is compressed and deformed in the thickness direction at the protrusions 6..., so that the contact area between the outer surface side attaching plate 10 and the corrugated H-shaped steel 2 through this deformable plate 12 increases, and the frictional force between them is improved. In this way, since there is no need to perform a process such as removing the protrusions 6... of the corrugated H-shaped steel 2, the processing labor can be saved, and since there is no need to increase the area of the attaching plate, the tightening work of the bolts 13 can be minimized.

[0029] As the outer surface side attaching plate 10 and the inner surface side attaching plate 11, the attaching plates used in the joining structure when connecting ordinary H-shaped steels can be used respectively.

[0030] The deformable plate 12 is made of a material that can be easily compressed and deformed in the thickness direction by the tightening force of the bolt 13. Specifically, it is preferable to use a thin aluminum plate, but it is not limited thereto. For example, a deformable metal plate such as copper, nickel, or gold, or a non-metal plate such as rubber or resin may be used. When using the thin aluminum plate, the plate thickness is preferably 1 to 5 mm, more preferably 2 to 4 mm. When the deformable plate 12 is slightly compressed and deformed in the thickness direction at the protrusion 6 due to the tightening of the bolt 13, the contact area between the protrusion 6 and the deformable plate 12 increases, so that the frictional force can be increased.

[0031] The frictional force may be further improved by performing a surface treatment for surface roughening such as blasting or shot peening on the plane of the deformable plate 12. This surface treatment is preferably performed on both opposing surfaces of the outer surface side attaching plate 10 and the outer surface of the flange 4, but may be performed on only one of the surfaces, particularly the surface in contact with the protrusion 6...

[0032] ( Reference Second means) As shown in FIG. 4(A), the second means of the joining structure is to provide an outer surface side attaching plate 10 and an inner surface side attaching plate 11 on the outer surface and the inner surface of the flange 4 straddling the joining ends of the grooved H-shaped steels 2, 2, respectively, and apply a putty material 14 to the surface of the outer surface side attaching plate 10 facing the outer surface of the flange 4 of the grooved H-shaped steel 2. As shown in FIG. 4(B), the outer surface side attaching plate 10, the flange 4 of the grooved H-shaped steel 2, and the inner surface side attaching plate 11 are integrally fastened with bolts 13, so that the putty material 14 is cured in a deformed state according to the pattern of the protrusions 6 formed on the outer surface of the flange 4 of the grooved H-shaped steel 2. In this way, since the putty material 14 is filled in the gap between the outer surface of the flange 4 other than the protrusions 6 and the outer surface side attaching plate 10, the outer surface side attaching plate 10 and the grooved H-shaped steel 2 are integrated, and a joining strength equal to or higher than that of a joint of an ordinary H-shaped steel with a flat outer surface can be ensured.

[0033] The putty material 14 is not particularly limited as long as it is curable and cures after a predetermined time has elapsed. However, it is preferably an epoxy resin-based material, and it is particularly good to use a material that does not sag even when used on a vertical surface.

[0034] The coating thickness of the putty material 14 is arbitrary and not particularly limited, but it is preferably approximately equal to the height of the protrusion 6.

[0035] ( Relating to the present invention Third means) The third means of the joint structure is shown in FIGS. 5 to 8. FIGS. 5 and 6 are assembly diagrams showing the third means of the joint structure, FIG. 7 is a view showing the joint end of one corrugated H-shaped steel 2A, and FIG. 8 is a view showing the joint end of the other corrugated H-shaped steel 2B.

[0036] As shown in FIG. 7, on each side of the web 5 of one corrugated H-shaped steel 2A, connecting plates 15, 15 parallel to the web 5 are provided in a state of protruding from the joint end face.

[0037] The connecting plate 15 is provided at a predetermined separation width from the web 5 and substantially parallel to the web 5, and is provided over substantially the entire length in the height direction of the web 5. And both ends in the height direction of the web 5 are welded to the inner surfaces of the flanges 4, 4 by welding portions 16.

[0038] In the portion of the connecting plate 15 that extends outside the joint end face of one corrugated H-shaped steel 2A (the tip side portion from the welding portion 16), through holes 17, 17... are respectively formed at the same positions penetrating the two connecting plates 15, 15.

[0039] A backing plate 28 having the same thickness as the inner transmission plate 19 described later is disposed between the connecting plate 15 and the web 5. As shown in FIG. 7(C), the edge on the central side in the axial direction of this backing plate 28 is welded to the web 5 by a welding portion 18.

[0040] On the other H-shaped steel 2B with stripes, as shown in Fig. 8, two transmission plates (inner transmission plate 19 and outer transmission plate 20) are arranged on both sides of the web 5 with a separation width into which the connecting plate 15 can be inserted, so that a slit portion 21 opening towards the joint end face is formed.

[0041] The three sides of the inner transmission plate 19 other than the side facing the joint end face are welded to the web 5 by welding portions 22. In the inner transmission plate 19, through holes 23, 23... communicating with the through holes 17... formed in the connecting plate 15 are formed in a state where the connecting plate 15 is inserted into the slit portion 21.

[0042] The upper and lower edges of the outer transmission plate 20 are welded to the inner surface of the flange 4 by welding portions 24 respectively. In the outer transmission plate 20, through holes 25, 25... communicating with the through holes 17... formed in the connecting plate 15 are formed in a state where the connecting plate 15 is inserted into the slit portion 21.

[0043] In addition, in the web 5, through holes 26, 26... communicating with the through holes 17... formed in the connecting plate 15 are formed in a state where the connecting plate 15 is inserted into the slit portion 21.

[0044] Then, in a state where the connecting plate 15 is inserted into the slit portion 21, the transmission plates 19, 20 and the connecting plate 15 arranged on both sides of the web 5 and the web 5 of the other H-shaped steel 2B with stripes are fastened by bolts 27, 27... integrally inserted through the through holes 17, 23, 25, 26.

[0045] Thus, in the joining structure according to the third means, since the connecting plate 15 and the transmission plates 19 and 20, which are fixed to the inner surface of the flange 4 or the web 5 respectively, are fixed by the bolts 27 passing through the web 5, it is a joining structure that can be firmly connected without providing an attachment plate to the flange 4. Further, since no attachment plate, bolt, or nut is arranged on the outer surface of the flange 4, the cover thickness of the concrete can be measured from the outer surface of the flange 4, the steel reinforcement position can be set closer to the outside of the concrete structure, which is advantageous in terms of strength.

Explanation of Signs

[0046] 1…Steel-concrete composite structure, 2…Corrugated H-shaped steel, 3…Concrete, 4…Flange, 5…Web, 6…Projection, 10…Outer surface side attachment plate, 11…Inner surface side attachment plate, 12…Easily deformable plate, 13…Bolt, 14…Putty material, 15…Connecting plate, 19…Inner transmission plate, 20…Outer transmission plate, 21…Slit portion

Claims

1. A joint structure for steel materials used in a steel-concrete composite structure, As the steel material of the steel-concrete composite structure, a corrugated H-shaped steel with protrusions of a predetermined pattern on the outer surface of the flange is used, On both sides of the web of one of the corrugated H-shaped steels, connecting plates parallel to the web are provided in a state of protruding from the joint end face, On both sides of the web of the other corrugated H-shaped steel, two transmission plates are arranged with a separation width into which the connecting plate can be inserted, thereby forming a slit portion that opens toward the joint end face, A joint structure for steel materials used in a steel-concrete composite structure, characterized in that, with the connecting plate inserted into the slit portion, the transmission plates and connecting plates arranged on both sides of the web and the web of the corrugated H-shaped steel are integrally bolted.

2. The joint structure for steel materials used in the steel-concrete composite structure according to Claim 1, wherein the pattern of the protrusions of the corrugated H-shaped steel is a lattice shape along the axial direction and the width direction of the corrugated H-shaped steel.

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