JP5974314B1 - Seismic reinforcement structure for H-shaped steel columns - Google Patents

Abstract

An H-shaped steel column that has a simple structure, is easy to assemble, can be integrated with a solidifying agent to reduce the amount of bar arrangement, and can eliminate damage caused by deformation of a fiber sheet disposed on the outer periphery. The purpose is to provide a seismic reinforcement structure. A horizontal horizontal reinforcing rib extending horizontally inwardly above and below a semicircular body having a horizontal cross section, and a left and right vertical reinforcing rib portion between the upper and lower horizontal reinforcing rib portions, and a pair of the left and right vertical reinforcing ribs. Reinforcing members arranged in a vertical direction with a predetermined gap around an H-shaped steel column standing upright from the lower structure so that they face each other, and a fiber sheet arranged on the outer periphery of the reinforcing member And a solidifying agent filled in a gap between the H-shaped steel column and the reinforcing member. [Selection] Figure 3

Description

  The present invention relates to a seismic reinforcement structure for an H-shaped steel column.

  Conventionally, as a seismic reinforcement structure for an H-shaped steel column, an outer periphery of an H-shaped steel column having an H-shaped cross section is surrounded by a rectangular steel plate by a pair of opposing flanges and a web provided within the facing interval. The grout material is filled inside and the axial streaks are embedded in the grout material, and the total bending strength of the axial streaks arranged on the side parallel to the web is arranged on the side parallel to the flange. There has been proposed a reinforcing structure of an H-shaped steel column that is stronger than the total bending strength of the axial streak and equalizes the bending strength in all directions of the reinforcing column.

JP2015-203199A

  However, the conventional seismic reinforcement structure of seismic H-shaped steel columns is not enough to integrate the rectangular enclosure steel plate and the grout agent, so the amount of reinforcement is increased, and the outer circumference of the enclosure steel plate because the enclosure steel plate is rectangular. However, the fiber sheet placed for increasing the tensile strength and improving the damping property has a problem that the corner of the rectangular steel plate is damaged by deformation.

  The present invention solves the problems of the prior art, has a simple structure, is easy to assemble, can be integrated with a solidifying agent to reduce the amount of bar arrangement, and is based on deformation of a fiber sheet disposed on the outer periphery. An object of the present invention is to provide a seismic reinforcement structure for an H-shaped steel column capable of eliminating damage.

In order to solve the above-mentioned problem, the seismic reinforcing structure for the H-shaped steel pillar of the present invention has a horizontal horizontal reinforcing rib in which a horizontal section extends horizontally inwardly on the upper and lower sides of a semicircular main body, and a plurality of axial reinforcement insertion holes are formed . An H-shaped steel column having a left and right vertical reinforcing rib portion in which a plurality of connecting bolt holes are formed between the upper and lower horizontal reinforcing rib portions, and a pair of them facing each other so that the left and right vertical reinforcing ribs are in contact with each other. A plurality of reinforcing members arranged in a vertical direction with a predetermined gap around the periphery, and a spiral bar inserted into an axial bar insertion hole formed in the vertical horizontal reinforcing rib with the lower end fixed to the lower structure Fills the gap between the axial streak, the nut screwed to the joint of the vertical stiffening ribs of the axial streak, the fiber sheet disposed on the outer periphery of the reinforcing member, and the H-shaped steel column and the reinforcing member And a solidifying agent

  The seismic reinforcement structure for an H-shaped steel column of the present invention is characterized in that positioning claws extending vertically upward and downward are fixed to the upper and lower reinforcing ribs.

  Moreover, the seismic reinforcement structure of the H-shaped steel column of the present invention is characterized in that the positions of the joint portions of the vertical reinforcing ribs of the pair of reinforcing members connected in the vertical direction are different by 90 degrees vertically.

  Moreover, the earthquake-proof reinforcement structure of the H-shaped steel column of the present invention is characterized in that the reinforcing member is made of metal or resin.

A horizontal horizontal reinforcing rib extending horizontally inwardly on the top and bottom of a semicircular body having a horizontal cross section, and a left and right vertical reinforcing rib portion between the upper and lower horizontal reinforcing rib portions, and a pair of the left and right vertical reinforcing ribs are in contact with each other A reinforcing member that is arranged in a vertical direction with a predetermined gap around an H-shaped steel column that is erected from the lower structure so as to face each other, a fiber sheet that is arranged on the outer periphery of the reinforcing member, and an H-shaped steel By comprising a solidifying agent filled in the gap between the column and the reinforcing member, the assembling work is easy and damage due to displacement of the fiber sheet disposed on the outer periphery of the reinforcing member assembled in a circular shape is prevented. It is possible to reduce the amount of fiber sheet arrangement compared to a rectangular reinforcing member, and the upper and lower horizontal reinforcing ribs and vertical reinforcing ribs of the reinforcing member promote the integration with the solidifying agent, and the amount of reinforcing bar arrangement Resistance of H-shaped steel columns It is possible to provide a reinforcing structure.
By fixing the positioning claws extending vertically upward and downward to the upper and lower reinforcing ribs, it is possible to improve the positioning accuracy when the reinforcing members are continuously provided in the upward direction.
By forming a plurality of connecting bolt holes in the left and right vertical reinforcing ribs, a pair of reinforcing members can be easily connected face to face.
By forming a plurality of axial streak insertion holes in the upper and lower horizontal reinforcing ribs, it is possible to accurately position and slide the axial streak.
The positions of the joints of the vertical reinforcing ribs of the pair of reinforcing members connected in the vertical direction are different by 90 degrees vertically, so that the positions of the joints of the vertical reinforcing ribs of the reinforcing members connected in the vertical direction are straight. It is possible to improve the bending strength because they are not aligned in a shape.
By fixing the lower end of the axial streak to the lower structure, the reinforcing effect of the axial streak can be improved.
Since the reinforcing member is made of metal or resin, it can be formed from a readily available material, so that a seismic reinforcing structure with low cost can be obtained.

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  An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a top view of a reinforcing member 1 used in an earthquake-proof reinforcing structure for an H-shaped steel column, and FIG. 2 is a front view of the reinforcing member 1.

  The reinforcing member 1 is formed of a metal such as steel or a resin such as reinforced resin. The reinforcing member 1 is formed with an upper horizontal reinforcing rib 3 and a lower horizontal reinforcing rib 4 extending horizontally forward and downward on a semicircular main body 2. Left and right vertical reinforcing ribs 5 that connect the upper and lower horizontal reinforcing ribs 3 and 4 and the ends of the main body 2 are formed.

  Positioning claws 6 are fixed to the upper and lower horizontal reinforcing ribs 3 and 4 so as to extend vertically upward and downward. A plurality of axial streak insertion holes 7 are formed in the upper and lower horizontal reinforcing ribs 3 and 4. A plurality of connecting bolt holes 8 are formed in the left and right vertical reinforcing ribs 5, 5.

  FIG. 3 shows a predetermined gap in the outer periphery of the H-shaped steel column 9 standing from the lower structure 13, and a pair of reinforcing members 1, 1 are arranged so that the left and right vertical reinforcing ribs 5, 5 are in contact with each other, It is a figure which shows the state which inserted and fixed the connecting bolt 10 in the hole 8 for connecting bolts formed in the vertical reinforcement rib 5. FIG. By connecting the pair of semicircular reinforcing members 1 and 1 face to face, a reinforcing portion having a circular outer periphery is formed.

  FIG. 4 shows a state in which a pair of reinforcing members 1, 1 connected in series to the outer periphery of an H-shaped steel column 9 erected with a lower end fixed to a lower structure 13 such as a floor or a foundation are sequentially connected upward. FIG. It joins so that the position of the joint surface of the vertical reinforcement ribs 5 and 5 of the reinforcement members 1 and 1 located up and down differs 90 degree | times. This is to prevent the bonding surfaces of the vertical reinforcing ribs 5 and 5 of the reinforcing members 1 and 1 positioned above and below from becoming weak points with respect to a bending moment when aligned in a straight line.

  A lower end portion of the axial streak 11 inserted in the axial streak insertion hole 7 formed in the upper and lower horizontal reinforcing ribs 3 and 4 of the reinforcing member 1 is fixed to the lower structure 13. By fixing the lower end of the axial streak 11 to the lower structure 13, the reinforcing effect of the axial streak 11 is improved.

  FIG. 5 is a view showing an embodiment of the upper and lower connection configuration of the reinforcing member 1 that is sequentially connected to the outer periphery of the H-shaped steel column 9 in the upward direction. In this embodiment, the axial streak 11 inserted into the axial streak insertion hole 7 of the upper and lower horizontal reinforcing ribs 3 and 4 of the reinforcing member 1 is a spiral streak, and a nut 12 is inserted into the axial streak 11 formed of the spiral streak. The upper and lower reinforcing members 1 are fixed by tightening the nuts 12 while sandwiching the upper and lower horizontal reinforcing ribs 3 and 4 of the reinforcing member 1 arranged in the vertical direction. It is also possible to form connecting bolt holes in the upper and lower horizontal reinforcing ribs 3 and 4 and fix them with connecting bolts.

  In FIG. 6, after the continuous arrangement of the reinforcing member 1 is finished on the reinforcement target of the H-shaped steel column 9 standing from the lower structure 13, the fiber sheet 14 is arranged on the outer periphery of the reinforcing member 1 with an adhesive. The fiber sheet 14 disposed on the outer periphery of the reinforcing member 1 has a function of improving the tensile strength of the reinforced H-shaped steel column 1 and attenuating seismic energy.

FIG. 7 is a diagram for comparing the lengths of the outer peripheral portions of a circular reinforcing member and a rectangular reinforcing member. If the rectangular reinforcing member is a square having a side length L of 0.7 m, the internal surface area is 0.49 m ² . The diameter R for making the internal area of the circular reinforcing member the same as that of the rectangular reinforcing member is π (R / 2) ² = 0.49. From the above formula, the diameter R of the circular reinforcing member that makes the internal area of the rectangular reinforcing member equal to the internal area of the circular reinforcing member is 0.78 m. Since the circumferential length of the circular reinforcing member is πR, it is 2.449 m . On the other hand, the length of the outer periphery of the rectangular reinforcing member is 0.7 × 4, which is 2.8 m.

  The case where the fiber sheet 14 is arranged on the outer periphery is compared from the comparison between the circular reinforcing member and the rectangular reinforcing member. When the fiber sheet 14 is arranged on the outer periphery of the rectangular reinforcing member, there are many cases where the fiber sheet 14 is damaged due to a large tensile force acting on the corners of the rectangular reinforcing member even with a small displacement. On the other hand, in the case of a circular reinforcing member, since the tensile force biased with respect to the displacement does not act, the fiber sheet 14 is rarely damaged.

  Due to the circumference of the circular reinforcing member and the outer circumference of the rectangular reinforcing member with the same internal area, the fiber sheet is arranged on the outer periphery of the circular reinforcing member compared to the outer periphery of the rectangular reinforcing member. This is advantageous in terms of cost.

  When the arrangement of the fiber sheet 14 on the outer periphery of the reinforcing member 1 is completed, the space between the H-shaped steel column 9 and the reinforcing member 1 is filled with a solidifying agent such as cement mortar. The solidifying agent is solidified, and the H-shaped steel column 9 and the reinforcing member 3 are integrated by the solidifying agent. Since the upper and lower horizontal reinforcing ribs 3 and 4 and the vertical reinforcing ribs 5 and 5 of the reinforcing member 1 are located on the side where the solidifying agent is filled, the integration of the reinforcing member 1 and the solidifying agent is promoted and the reinforcing effect is enhanced. . As a result, it is possible to reduce the amount of reinforcing reinforcing bars, resulting in a cost-effective seismic reinforcement structure.

  As described above, according to the seismic reinforcement structure of the H-shaped steel column of the present invention, assembly work is easy, and damage due to displacement of the fiber sheet 14 disposed on the outer periphery of the reinforcing member 1 assembled in a circular shape is prevented. Compared to the rectangular reinforcing member, the arrangement amount of the fiber sheet 14 can be reduced, and the vertical horizontal reinforcing ribs 3 and 4 and the vertical reinforcing ribs 5 and 5 of the reinforcing member 1 promote integration with the solidifying agent. And it becomes possible to provide the seismic reinforcement structure of the H-shaped steel pillar 9 which can reduce the amount of reinforcement reinforcement.

  1: reinforcing member, 2: main body, 3: upper horizontal reinforcing rib, 4: lower horizontal reinforcing rib, 5: vertical reinforcing rib, 6: positioning claw, 7: axial direction insertion hole, 8: connecting bolt hole, 9: H-shaped steel column, 10: connecting bolt, 11: axial streak, 12: nut, 13: substructure, 14: fiber sheet

Claims (4)

Vertical horizontal reinforcement ribs that extend horizontally inside the upper and lower sides of the semicircular horizontal section and that have a plurality of axial streak insertion holes, and left and right vertical reinforcements that have a plurality of connecting bolt holes between the upper and lower horizontal reinforcement ribs Reinforcement having a plurality of ribs in a vertical direction with a predetermined gap around an H-shaped steel column standing upright from the lower structure with the ribs facing each other so that the left and right vertical reinforcement ribs are in contact with each other Members,
An axial line consisting of a spiral line inserted into an axial line insertion hole formed on the upper and lower horizontal reinforcing ribs with the lower end fixed to the lower structure;
A nut that is screwed to the joint of the upper and lower horizontal reinforcing ribs of the axial line;
A fiber sheet disposed on the outer periphery of the reinforcing member;
A solidifying agent filled in a gap between the H-shaped steel column and the reinforcing member;
An earthquake-proof reinforcement structure for H-shaped steel columns, characterized by comprising:   The seismic reinforcement structure for an H-shaped steel column according to claim 1, wherein positioning claws extending vertically upward and downward are fixed to the vertical reinforcing ribs.   The seismic reinforcement structure for an H-shaped steel column according to claim 1 or 2, wherein the positions of the joint portions of the vertical reinforcing ribs of the pair of reinforcing members arranged in the vertical direction differ by 90 degrees vertically.   The seismic reinforcement structure for an H-shaped steel column according to any one of claims 1 to 3, wherein the reinforcing member is made of metal or resin.

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