JP2017226987A - Aseismatic reinforcement structure for existing or new steel structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an aseismatic reinforcement structure for an existing or new steel structure that has a simple structure, may be manufactured readily, curtails aseismatic reinforcement work and prevents deterioration of a fiber sheet enhancing tensile strength and damping performance for seismic energy.SOLUTION: An aseismatic reinforcement structure for an existing or new steel structure includes a reinforcement member comprising fiber sheet sandwiching steel plates having a fiber sheet disposed between an outer steel plate and an inner steel plate, an existing or new steel structure, and a fixing member for fixing the reinforcement member comprising the fiber sheet sandwiching steel plates disposed on a surface of the existing or new steel structure.SELECTED DRAWING: Figure 5

Description

  The present invention relates to a seismic reinforcement structure for an existing or new steel structure.

  Conventionally, as a seismic reinforcement structure for steel structures used in the technical fields of civil engineering and construction, the outer periphery of the steel structure such as steel columns is surrounded by a reinforcing steel plate, and a curable material is filled between the steel structure and the reinforcing steel plate. Seismic reinforcement structures for steel structures to be integrated have been proposed.

  In addition, an anti-seismic reinforcement structure for a steel structure has been proposed in which a concrete material is filled and solidified on the outer periphery of an H-shaped steel structure and a fiber sheet is disposed on the outer periphery.

JP 2009-235817 A JP 2008-0669606 A

  However, conventional seismic reinforcement structures for steel structures require the filling of curable materials, which takes time for seismic reinforcement work, and because the reinforcing fiber sheet is exposed and exposed to the outside. The fiber sheet deteriorates due to the environment, and the seismic reinforcement effect cannot be obtained.

  The present invention solves the problems of the prior art, and is a fiber sheet that is simple in structure, easy to manufacture, requires only a short time for seismic reinforcement work, and improves tensile strength and seismic energy attenuation performance. It aims at providing the seismic reinforcement structure of the existing or new steel structure which can prevent deterioration of the steel.

  In order to solve the above problems, the existing or new steel structure seismic reinforcement structure of the present invention has a fiber sheet disposed between the outer steel plate and the inner steel plate in the existing or new steel structure seismic reinforcement structure. A reinforcing member made of a fiber sheet sandwich steel plate, an existing or new steel structure, and a fixing member for fixing the reinforcing member made of a fiber sheet sand steel plate arranged on the surface of the existing or new steel structure It is characterized by that.

  Moreover, the seismic reinforcement structure of the existing or new steel structure of the present invention is characterized in that the outer steel plate is formed with a bent portion for holding the inner steel plate with the fiber sheet sanded.

  Moreover, the earthquake-proof reinforcement structure of the existing or new steel structure of the present invention is characterized in that a plurality of fixing member insertion holes are formed in the reinforcement member.

  Moreover, the seismic reinforcement structure of the existing or new steel structure of the present invention is characterized in that the existing or new steel structure is composed of any one of an H-shaped steel, a cross-section rectangular steel pipe, and a cross-section circular steel pipe.

In the seismic reinforcement structure of an existing or new steel structure, a reinforcing member made of a fiber sheet sandy steel plate with a fiber sheet placed between the outer steel plate and the inner steel plate, an existing or new steel structure, and an existing or new steel structure A reinforcing member made of a fiber sandwich steel plate that has a simple structure and can be easily formed in a factory by including a fixing member that fixes a reinforcing member made of a fiber sheet sand-like steel plate disposed on the surface of a steel structure Improves the seismic performance of existing or new steel structures, and sandwiched fiber sheets improve tensile strength and seismic energy attenuation. Further, since the fiber sheet is not exposed to the external environment, the fiber sheet is prevented from being deteriorated, and a long-life reinforcing member can be obtained.
By forming the bent portion that suppresses the inner steel plate in which the fiber sheet is sanded on the outer steel plate, it is possible to firmly integrate the fiber sheet sandwich steel plate by pressing the bent portion so as to crimp the inner steel plate.
By forming a plurality of fixing member insertion holes in the reinforcing member, it becomes possible to facilitate the fixing operation of the reinforcing member to an existing or new steel structure.
The existing or new steel structure is made of any one of H-shaped steel, rectangular steel pipe with a cross-section, and circular steel pipe with a cross-section, so that any shape of existing or new steel structure can be seismically reinforced.

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  Embodiments of the present invention will be described with reference to the drawings. 1, 2, and 3 show an outer steel plate 2, a fiber sheet 3, and an inner steel plate 4 that constitute a reinforcing member 1 made of a fiber sheet sandwich steel plate used in the seismic reinforcement structure of an existing or new steel structure of the present invention. FIG.

  As shown in FIG. 1, the outer side steel plate 2 is formed with bent portions 2a on four sides of a rectangular main body. A plurality of fixed body member insertion holes 2b are formed in the rectangular main body.

  As shown in FIG. 2, the fiber sheet 3 disposed on the inner side of the outer steel plate 2 has a rectangular shape that is substantially the same size as the main body of the outer steel plate 2. The material of the fiber sheet 3 is an inorganic fiber such as carbon fiber, or an organic fiber such as aramid fiber, polyethylene fiber, or polyarate fiber. 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.

  As shown in FIG. 3, the inner steel plate 4 disposed on the fiber sheet 3 is approximately the same size as the fiber sheet 3. A fixing member insertion hole 4 a is formed in the inner steel plate 4 at a position that matches the fixing member insertion hole 2 b formed in the main body of the outer steel plate 2 in a state where the fiber sheet 3 is sandwiched between the outer steel plate 2 and the inner steel plate 4.

  4A and 4B are a back view and a cross-sectional view showing a state in which the outer steel plate 2, the fiber sheet 3, and the inner steel plate 3 are integrated to form a reinforcing member 1 made of a fiber sheet sandwich steel plate. An outer steel plate 2, a fiber sheet 3, and an inner steel plate 4 are arranged, a bent portion 2a of the outer steel plate 2 is bent, and the reinforcing member 1 made of a fiber sheet sandwich steel plate is pressed so as to crimp the surface of the inner steel plate 4 with the bent portion 2a. Form.

  Examples of existing or new steel structures to be subjected to seismic reinforcement include H-shaped steel, rectangular steel pipes with cross sections, steel columns formed with circular steel pipes with cross sections, and steel beams. As a reinforcing member 1 used for seismic reinforcement of a steel structure composed of a circular steel pipe in cross section, an outer steel plate 2 having a semicircular cross section and an inner steel plate 4 having a semicircular cross section are used.

  FIG. 5 is a diagram showing a seismic reinforcement structure of an existing or new steel structure made of H-shaped steel 5. The reinforcing member 1 is arranged on the upper and lower flange portions 5a and the web portion 5b of the H-shaped steel 5, and the fixing member insertion hole 2b of the outer steel plate 2 and the inner steel plate 4 of the reinforcing member 1 are fixed as fixing members through the fixing member insertion holes 4a. Insert the bolt 6. Before inserting the fixing bolt 6, a hole is made in the fiber sheet 3 existing between the fixing member insertion hole 2 b of the outer steel plate 2 and the inner steel plate 4 of the reinforcing member 1 using a punching tool. Is desirable. After inserting the fixing bolt 6, a nut 7 is screwed onto the male screw portion of the fixing bolt 6, and the reinforcing member 1 is seismically reinforced with an existing or new steel structure made of H-shaped steel 5.

  FIG. 6 is a diagram showing a seismic reinforcement structure of an existing or new steel structure composed of a rectangular steel pipe 8 in cross section. The reinforcing member 1 is arranged on the outer periphery of the rectangular steel pipe 8 in cross section, and the fixing bolt 6 is inserted through the fixing member insertion hole 2b of the outer steel plate 2 of the reinforcing member 1 and the: fixing member insertion hole 4a of the inner steel plate 4. After inserting the fixing bolt 6, a nut 7 is screwed onto the male screw portion of the fixing bolt 6, and the reinforcing member 1 is seismically reinforced with an existing or new steel structure composed of a rectangular steel pipe 8 in section. When it is difficult to screw the nut 7 from the inside as in the case of the rectangular steel pipe 8, it is preferable to use a fixing member that expands and fixes the tip expanding portion by driving a wedge as the fixing member.

  FIG. 7 is a diagram showing a seismic reinforcement structure of an existing or new steel structure composed of a circular steel pipe 9 in cross section. Reinforcing member 1 having a semicircular cross section is arranged facing the outer periphery of steel tube 9 having a circular cross section, and fixing member insertion hole 2b of outer steel plate 2 having a semicircular cross section and inner steel plate 4: fixed through fixing member insertion hole 4a. Insert the bolt 6. After inserting the fixing bolt 6, a nut 7 is screwed onto the male thread portion of the fixing bolt 6, and the reinforcing member 1 is seismically reinforced with an existing or new steel structure composed of a circular steel pipe 9 in cross section. When it is difficult to screw the nut 7 from the inside like the circular steel pipe 8 in cross section, it is preferable to use a fixing member that is fixed by expanding the tip expanding portion by driving a wedge as the fixing member.

  As described above, according to the seismic reinforcement structure of an existing or new steel structure of the present invention, a reinforcing member made of a fiber sandwich steel plate that has a simple structure and can be easily formed in a factory is an existing or new steel structure. Improves seismic performance of objects, and sandwiched fiber sheets improve tensile strength and seismic energy attenuation performance. Further, since the fiber sheet is not exposed to the external environment, the fiber sheet is prevented from being deteriorated, and a long-life reinforcing member can be obtained.

  1: reinforcing member, 2: outer steel plate, 2a: bent portion, 2b: fixing member insertion hole, 3: fiber sheet, 4: inner steel plate, 4a: fixing member insertion hole, 5: H-shaped steel, 5a: flange portion, 5b : Web part, 6: fixing bolt, 7: nut, 8: rectangular steel pipe in cross section, 9: circular steel pipe in cross section

In order to solve the above-mentioned problem, the existing or new steel structure seismic reinforcing structure of the present invention is the existing or new steel structure seismic reinforcing structure, in which the existing or new steel structure, the outer steel plate and the inner side are arranged. A reinforcing member made of a fiber sheet sandwich steel plate in which a fiber sheet is arranged between steel plates, a bent portion is formed to suppress the inner steel plate surface sandwiched between the fiber sheets on the outer steel plate, and a plurality of fixing member insertion holes are formed. And a fixing member for fixing a reinforcing member made of a fiber sheet sandwich steel plate disposed on the surface of the steel structure.

In the seismic reinforcement structure of an existing or new steel structure, a fiber sheet is placed between the existing or new steel structure and the outer steel plate and the inner steel plate, and the inner steel plate surface with the fiber sheet sandwiched between the outer steel plate is suppressed. A reinforcing member made of a fiber sheet sandwich steel plate in which a bent portion is formed and a plurality of fixing member insertion holes are formed, and a fixing member for fixing a reinforcing member made of a fiber sheet sandwich steel plate arranged on the surface of an existing or newly-installed steel structure; The reinforcement member made of fiber sandwich steel plate, which has a simple structure and can be easily formed at the factory, improves the seismic performance of the existing or new steel structure, and the sandwiched fiber sheet has a tensile strength. As well as improving the seismic energy attenuation performance. Further, since the fiber sheet is not exposed to the external environment, the fiber sheet is prevented from being deteriorated, and a long-life reinforcing member can be obtained.
The existing or new steel structure is made of any one of H-shaped steel, rectangular steel pipe with a cross-section, and circular steel pipe with a cross-section, so that any shape of existing or new steel structure can be seismically reinforced.

Claims (4)

In the seismic reinforcement structure of existing or new steel structures,
A reinforcing member composed of a fiber sheet sandy steel plate in which a fiber sheet is disposed between the outer steel plate and the inner steel plate;
An existing or new steel structure;
A fixing member for fixing a reinforcing member made of a fiber sheet sandwich steel plate disposed on the surface of an existing or new steel structure;
A seismic reinforcement structure for an existing or new steel structure characterized by comprising:   2. The seismic reinforcement structure for an existing or new steel structure according to claim 1, wherein the outer steel plate is formed with a bent portion for holding the inner steel plate having a fiber sheet sanded.   The seismic reinforcement structure for an existing or new steel structure according to claim 1 or 2, wherein a plurality of fixing member insertion holes are formed in the reinforcement member.   The existing or new steel structure is composed of any one of an H-shaped steel, a rectangular steel pipe having a cross section, and a circular steel pipe having a cross section. Seismic reinforcement structure for steel structures.

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