JP2018087417A - Seismic reinforcement structure of h-shaped steel column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a seismic reinforcement structure of an H-shaped steel column which can improve seismic performance with a seismic reinforcement space as a minimum limit by a simple constitution.SOLUTION: A seismic reinforcement structure of an H-shaped steel column is composed of: the H-shaped steel column in which tie-rod insertion holes are formed with prescribed intervals in a height direction of a web 3; a form member 7 which is continuously arranged in the height direction of the H-shaped steel column, and in which engagement parts 7b engaged with flange end parts are formed at both ends of a center part which is fit between flanges 2, 2, and tie-rod insertion holes are formed in positions corresponding to the tie-rod insertion holes of the web 3; reinforcement plates 8 which are laminated at the outside of the form member 7, and in which tie-rod insertion holes are formed in positions corresponding to the tie-rod insertion holes of the web 3 and the form member 7; tie rods 9 which are inserted into the tie-rod insertion holes formed at the reinforcement plates 8, the form member 7 and the web 3, and in which male screws are formed at both ends; nuts 10 which are screwed to the both-end male screws of the tie rods 9; reinforcement bars which are arranged in a space surrounded by H-shaped steel and the form member; and a solidification material which is changed into the space surrounded by the H-shaped steel and the form member 7.SELECTED DRAWING: Figure 5

Description

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

  Conventionally, in order to seismically reinforce an existing H-shaped steel column, the H-shaped steel column is surrounded by a surrounding steel plate, a reinforcing bar is arranged in the space between the H-shaped steel column and the surrounding steel plate, and the H-shaped steel column and the surrounding steel plate A seismic reinforcement structure for an H-shaped steel column that is solidified by filling a space with a solidifying material such as grout has been proposed.

JP2015-203199A

  Since the conventional seismic reinforcement structure of the H-shaped steel column needs to enclose the entire circumference of the H-shaped steel column and surround it with a steel plate, a sufficient space for reinforcement is necessary. However, there are many cases in which a structure such as a wall is adjacent to an existing H-shaped steel column, or a structure such as a wall is connected in series, and the entire circumference of the H-shaped steel column is enclosed by a steel plate. Had a problem that could not be secured.

  An object of the present invention is to provide a seismic reinforcement structure for an H-shaped steel column that can improve seismic performance while minimizing seismic reinforcement space with a simple configuration that solves the problems of the prior art.

  In order to solve the above-mentioned problem, the seismic reinforcement structure for an H-shaped steel column of the present invention comprises a pair of opposing flanges and a web provided within the facing interval, and the tie rod insertion holes at predetermined intervals in the height direction of the web. The tie rod insertion hole formed in the web is formed with an H-shaped steel column formed on the web and an engaging portion that engages with the flange end at both ends of the central portion that is connected in the height direction of the H-shaped steel column and is fitted between the flanges. The tie rod insertion hole is formed at a position corresponding to the tie rod insertion hole formed on the outer side of the mold member, the tie rod insertion hole formed on the web and the tie rod insertion hole formed on the mold member. The formed reinforcing plate, the reinforcing plate, the formwork member, the tie rod formed with male screws at both ends to be inserted into the tie rod insertion holes formed on the web, and the male screws at both ends of the tie rod are screwed. And a reinforcing bar arranged in a space surrounded by the H-shaped steel and the formwork member, and a solidified material filled in the space surrounded by the H-shaped steel and the formwork member. .

  Further, in the seismic reinforcement structure for the H-shaped steel column of the present invention, the length in the height direction of the reinforcing plate is made longer than the length in the height direction of the mold member, and the continuous portion of the mold member and the reinforcing member are connected in series. The position of the part is not matched.

  Moreover, the seismic reinforcement structure of the H-shaped steel column of the present invention is characterized by comprising a continuous fiber sheet disposed on the outer surface of the mold member and the outer surface of at least one flange.

  Moreover, the seismic reinforcement structure of the H-shaped steel column of the present invention is characterized in that both sides sandwiching the web of the H-shaped steel column are seismically reinforced.

  Moreover, the seismic reinforcement structure of the H-shaped steel column of the present invention is characterized in that only one side of the H-shaped steel column web is seismic-reinforced.

A pair of opposing flanges, and a H-type steel column comprising webs provided in the interval between the flanges, in which tie rod insertion holes are formed at a predetermined interval in the height direction, and a flange provided continuously in the height direction of the H-type steel column An engagement portion that engages with the flange end portion is formed at both ends of the central portion that is inserted between the mold member, and a tie rod insertion hole is formed at a position corresponding to the tie rod insertion hole formed in the web, A tie rod insertion hole formed in the web and a tie rod insertion hole formed in the web and a tie rod insertion hole formed in the mold member, and a tie rod insertion hole formed in the reinforcement plate, the mold member, and the web. A tie rod that is inserted into the both ends and formed with male threads at both ends, a nut that is screwed onto the male threads at both ends of the tie rod, a reinforcing bar that is arranged in a space surrounded by the H-shaped steel and the formwork member, Because it consists of the solidified material that fills the space surrounded by the mold steel and the formwork member, the seismic reinforcement space can be minimized and the number of parts is small, making it easy to place the reinforcement material on the H-shaped steel column. It is possible to provide a seismic reinforcement structure for an H-shaped steel column that can be implemented quickly and has a large seismic performance.
The length of the reinforcing plate in the height direction is longer than the length in the height direction of the formwork member, so that the position of the formwork member connection part and the position of the reinforcement member connection part do not match. It is possible to improve the strength against the displacement.
By providing the continuous fiber sheet disposed on the outer surface of the mold member and the outer surface of at least one of the flanges, it is possible to improve the tensile strength and the earthquake attenuation.
By providing seismic reinforcement on both sides of the web of the H-shaped steel column, it is possible to provide an earthquake-resistant reinforcing structure for the H-shaped steel column having high strength.
By seismically reinforcing only one side of the web of the H-shaped steel column, it is possible to obtain sufficient earthquake resistance even with seismic reinforcement on only one side due to the presence of obstacles.

(A) (b) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. (A) (b) It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention. It is a figure which shows embodiment of this invention.

An embodiment of the present invention will be described with reference to the drawings. Fig.1 (a) (b) (c) is a figure which shows the H-shaped steel pillar 1 of the object of seismic reinforcement.

  The H-shaped steel pillar 1 to be seismically reinforced is composed of a pair of opposing flanges 2 and 2 and a web 3 provided within the facing interval. The lower end of the H-shaped steel column 1 is connected to a foundation 5 installed in a lower structure 4 such as a floor. The upper end of the H-shaped steel column 1 is connected to an upper structure 6 such as a beam. Tie rod insertion holes 3a are formed in the web 3 at predetermined intervals in the height direction. The length between the outer sides of the flanges 2 and 2 of the H-shaped steel column 1 is L1, the length between the inner sides between the flanges 2 and 2 is L2, and the thickness of the flanges 2 and 2 is L3.

  FIGS. 2A and 2B are views showing a formwork member 7 provided continuously in the height direction of the H-shaped steel column 1. The mold member 7 is formed of a metal such as steel or a resin such as reinforced resin. The formwork member 7 includes a central portion 7a fitted between the flanges 2 and 2 of the H-shaped steel column 1, and engaging portions 7b engaged with the end surfaces of the flanges 2 and 2 at both ends of the central portion 7a. A tie rod insertion hole 7 c is formed at a position corresponding to the tie rod insertion hole 3 a formed in the web 3 of the H-shaped steel pillar 1 in the center portion 7 a of the mold member 7. The length between the outsides of the engaging portion 7b of the mold member 7 is l1, the length of the central portion 7a is l2, the length of the engaging portion 7b is l3, and L1 = l1, L2 = l2, and L3 = l3. . The length of the mold member 7 in the height direction is T1. Since the center portion 7a of the mold member 7 is fitted between the flanges 2 and 2 and the engaging portion 7b is engaged with the end surfaces of the flanges 2 and 2, positioning at the time of installation can be easily performed.

  FIGS. 3A and 3B are views showing the reinforcing plate 8 laminated on the outside of the formwork member 7. The reinforcing plate 8 is formed of a metal such as steel or a resin such as reinforced resin. The length of the reinforcing plate 8 in the width direction is the same as the length l1 between the outer sides of the engaging portions 7b of the mold member 7. A tie rod insertion hole 8a is formed in the reinforcing plate 8 at a position corresponding to a tie rod insertion hole 3a formed in the web 3 and a tie rod insertion hole 7c formed in the central portion 7a of the mold member 7. The length t1 of the reinforcing plate 8 in the height direction is made longer than the length T1 of the mold member 7 in the height direction. The position of the continuous portion formed by connecting the mold member 7 in the height direction and the position of the continuous portion of the reinforcing plate 8 stacked on the outside of the mold member 7 and connected in the height direction Do not match. By preventing the positions of the continuous portion of the formwork member and the continuous portion of the reinforcing member from matching each other, it is possible to improve the strength against displacement during an earthquake.

  4 shows a tie rod insertion hole 3a formed in the web 3, a tie rod insertion hole 7c formed in the central portion 7a of the mold member 7, a tie rod 9 and a tie rod 9 inserted into a tie rod insertion hole 8a formed in the reinforcing plate 8. FIG. It is a figure which shows the nut 10 screwed by the both-ends male screw 9a.

  FIG. 5 is a horizontal cross-sectional view of an embodiment in which both sides of the H-shaped steel pillar 1 across the web 3 are seismically reinforced. The mold member 7 is disposed in the flanges 2, 2 of the H-shaped steel column 1 so that the center portion 7 a is fitted in the flange 2.2 and the engaging portion 7 b is engaged with the end faces of the flanges 2, 2. A continuous fiber sheet 11 is disposed outside the formwork member 7 with an adhesive. The continuous fiber sheet 11 may be disposed on the flange surface. Examples of the material for the continuous fiber sheet include inorganic fibers such as carbon fibers, and organic fibers such as aramid fibers, polyethylene fibers, and polyarate fibers. The tensile strength of the fiber sheet 3 in one direction and two directions formed with these fibers is as high as 5 to 180 ton / m. By providing the continuous fiber sheet 11, it becomes possible to improve the tensile strength and the attenuation of earthquakes.

  The reinforcing plate 8 is laminated on the continuous fiber sheet 11. The formwork member 7, the continuous fiber sheet 11, and the reinforcing plate 8 are arranged in a row up to the height of the seismic reinforcement target of the H-shaped steel column 1. A tie rod 9 is inserted into a tie rod insertion hole 3 a formed in the web 3, a tie rod insertion hole 7 c formed in the center portion 7 a of the mold member 7, and a tie rod insertion hole 8 a formed in the reinforcing plate 8. A nut 10 is screwed onto 9a and fastened. The earthquake resistance is improved by arranging the reinforcing plate 8.

  A reinforcing bar 12 is arranged in a space surrounded by the web 3, the flanges 2, 2 and the formwork member 7 of the H-shaped steel column 1. Thereafter, a solidifying material such as high-strength grout is filled and solidified, and the H-shaped steel column 1, the formwork member 7, the continuous fiber sheet 11 and the reinforcing plate 8 are integrated. It becomes possible to provide the seismic reinforcement structure of the steel column 1.

  FIG. 6 is a diagram showing an embodiment in which seismic reinforcement is performed only on one side of the web 3 due to the presence of an obstacle or the like. Even with the seismic reinforcement on one side only, sufficient seismic performance can be obtained.

  FIG. 7 is a view showing a longitudinal sectional view of the seismic reinforcement structure of the H-shaped steel column 1 extending from the lower structure 4 to the upper structure 6. A formwork member 7 in which a continuous fiber sheet 11 is arranged on the outer surface is connected to the H-shaped steel column 1 extending from the foundation 5 of the lower structure 4 to the upper structure 6 such as a beam in an upward direction. A reinforcing plate 8 is disposed outside the formwork member 7 on which the continuous fiber sheet 11 is disposed. The length in the height direction of the reinforcing plate 8 is made longer in the height direction of the mold member 7, so that the positions of the continuous portion of the mold member 7 and the continuous portion of the reinforcing plate 8 do not match. . This is because the strength against displacement during an earthquake is weakened if the positions of the continuous portions of the mold member 7 and the continuous portions of the reinforcing plate 8 match.

  A tie rod 9 is inserted into a tie rod insertion hole 3 a formed in the web 3, a tie rod insertion hole 7 c formed in the center portion 7 a of the mold member 7, and a tie rod insertion hole 8 a formed in the reinforcing plate 8. A nut 10 is screwed onto 9a and fastened. A reinforcing bar 12 is arranged in a space surrounded by the web 3, the flanges 2, 2 and the formwork member 7 of the H-shaped steel column 1.

  A lower reinforcing brace 13 is disposed between the lower structure 4 and the reinforcing plate 8, and an upper reinforcing brace 14 is disposed between the upper structure 6 and the reinforcing plate 8. A space surrounded by the web 3, the flanges 2, 2 and the formwork member 7 of the H-shaped steel column 1 is filled with a solidifying material such as high-strength grout and solidified, and the H-type steel pillar 1, the formwork member 7, continuous fiber The sheet 11 and the reinforcing plate 8 are integrated. The lower reinforcing brace 13 and the upper reinforcing brace 14 function as reinforcing members against pressure during filling of the solidifying material. The lower reinforcing brace 13 and the upper reinforcing brace 14 may be left as they are after the solidifying material is solidified.

  As described above, according to the seismic reinforcement structure of the H-shaped steel column of the present invention, the seismic reinforcement space can be minimized, and the placement work of the reinforcing material on the H-shaped steel column can be easily and quickly performed with a small number of parts. In addition, it is possible to provide a seismic reinforcing structure for an H-shaped steel column having a large seismic performance.

  1: H-shaped steel column, 2: flange, 3: web, 3a: tie rod insertion hole, 4: lower structure, 5: foundation, 6: upper structure, 7: formwork member, 7a: central part, 7b: engaging part 7c: Tie rod insertion hole, 8: Reinforcing plate, 8a: Tie rod insertion hole, 9: Tie rod, 9a: Male screw, 10: Nut, 11: Continuous fiber sheet, 12: Reinforcing bar, 13: Lower reinforcing brace, 14: Upper reinforcement brace

In order to solve the above-mentioned problem, the seismic reinforcement structure for an H-shaped steel column of the present invention comprises a pair of opposing flanges and a web provided within the facing interval, and the tie rod insertion holes at predetermined intervals in the height direction of the web. The tie rod insertion hole formed in the web is formed with an H-shaped steel column formed on the web and an engaging portion that engages with the flange end at both ends of the central portion that is connected in the height direction of the H-shaped steel column and is fitted between the flanges. The tie rod insertion hole is formed at a position corresponding to the tie rod insertion hole formed on the outer side of the mold member, the tie rod insertion hole formed on the web and the tie rod insertion hole formed on the mold member. Forming a reinforcing plate that is longer than the length in the height direction of the formwork member and is continuously provided so that the position of the connecting portion does not match the position of the connecting portion of the formwork member ; Plates, formwork members, Filled in a space surrounded by a tie rod formed with male screws at both ends inserted into tie rod insertion holes formed on the web, nuts screwed onto both male screws at both ends of the tie rod, and H-shaped steel and a formwork member And a solidifying material.

A pair of opposing flanges, and a H-type steel column comprising webs provided in the interval between the flanges, in which tie rod insertion holes are formed at a predetermined interval in the height direction, and a flange provided continuously in the height direction of the H-type steel column An engagement portion that engages with the flange end portion is formed at both ends of the central portion that is inserted between the mold member, and a tie rod insertion hole is formed at a position corresponding to the tie rod insertion hole formed in the web, A tie rod insertion hole is formed at a position corresponding to the tie rod insertion hole formed on the outer side and formed on the web and the tie rod insertion hole formed on the mold member, and the length in the height direction is determined by the length in the height direction of the mold member. Reinforcement plate that is extended so that the position of the connecting portion does not match the position of the connecting portion of the mold member, and males at both ends that are inserted into the tie rod insertion holes formed in the reinforcing plate, the mold member, and the web. Screw shape The tie rod, the nut that is screwed to the male screw at both ends of the tie rod, and the solidified material that fills the space surrounded by the H-shaped steel and the frame member can minimize the seismic reinforcement space. The number of parts can be reduced, and the placement work of the reinforcing material on the H-shaped steel column can be carried out easily and quickly. It is possible to provide an earthquake-resistant reinforcing structure for the H-shaped steel column with a large seismic performance. By making the length longer than the length in the height direction of the formwork member so that the positions of the continuous part of the formwork member and the continuous part of the reinforcing member do not match, the strength against displacement during an earthquake is increased. It becomes possible to improve.
By providing the continuous fiber sheet disposed on the outer surface of the mold member and the outer surface of at least one of the flanges, it is possible to improve the tensile strength and the earthquake attenuation.
By providing seismic reinforcement on both sides of the web of the H-shaped steel column, it is possible to provide an earthquake-resistant reinforcing structure for the H-shaped steel column having high strength.
By seismically reinforcing only one side of the web of the H-shaped steel column, it is possible to obtain sufficient earthquake resistance even with seismic reinforcement on only one side due to the presence of obstacles.

Claims (5)

A pair of opposing flanges, and a H-shaped steel column comprising a web provided within the facing interval, and having tie rod insertion holes formed at predetermined intervals in the web in the height direction;
An engaging portion that engages with the flange end portion is formed at both ends of the central portion that is provided in the height direction of the H-shaped steel column and is fitted between the flanges, and the tie rod insertion hole is formed at a position corresponding to the tie rod insertion hole formed in the web. A formwork member formed with
A tie rod insertion hole formed on the web laminated on the outside of the mold member and a tie rod insertion hole formed at the position corresponding to the tie rod insertion hole formed on the mold member;
Reinforcement plate, formwork member, tie rod formed with male threads at both ends inserted into tie rod insertion holes formed in the web,
A nut that is screwed to the male thread at both ends of the tie rod;
Reinforcement bars arranged in a space surrounded by H-shaped steel and formwork members;
A solidified material filled in a space surrounded by H-shaped steel and a formwork member;
An earthquake-proof reinforcement structure for H-shaped steel columns, characterized by comprising:   The length in the height direction of the reinforcing plate is made longer than the length in the height direction of the mold member so that the positions of the continuous portion of the mold member and the continuous portion of the reinforcing member do not match. The earthquake-proof reinforcement structure of the H-shaped steel column according to claim 1.   The seismic reinforcement structure for an H-shaped steel column according to claim 1 or 2, further comprising a continuous fiber sheet disposed on the outer surface of the formwork member and at least one outer surface of the flange.   The seismic reinforcement structure for an H-shaped steel column according to any one of claims 1 to 3, wherein both sides of the web of the H-shaped steel column are seismically strengthened.   The seismic reinforcement structure for an H-shaped steel column according to any one of claims 1 to 3, wherein only one side of the web of the H-shaped steel column is seismically strengthened.

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