WO2001048337A1 - Procede de renforcement de batiment, materiau et structure - Google Patents
Procede de renforcement de batiment, materiau et structure Download PDFInfo
- Publication number
- WO2001048337A1 WO2001048337A1 PCT/JP2000/009265 JP0009265W WO0148337A1 WO 2001048337 A1 WO2001048337 A1 WO 2001048337A1 JP 0009265 W JP0009265 W JP 0009265W WO 0148337 A1 WO0148337 A1 WO 0148337A1
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- WO
- WIPO (PCT)
- Prior art keywords
- high ductility
- reinforcing
- building
- wound
- rubber
- Prior art date
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0225—Increasing or restoring the load-bearing capacity of building construction elements of circular building elements, e.g. by circular bracing
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements
- E04G2023/0262—Devices specifically adapted for anchoring the fiber reinforced plastic elements, e.g. to avoid peeling off
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/249921—Web or sheet containing structurally defined element or component
- Y10T428/249953—Composite having voids in a component [e.g., porous, cellular, etc.]
Definitions
- the present invention relates to a member (beam, girder, slab, wall, pillar, etc.) of a building or various infrastructure facilities (hereinafter, collectively referred to as a “building”).
- Component of the structure) Force Destruction caused by the action of seismic force or wind power, sudden external action such as excessive load due to demolition, or insufficient strength due to aging, resulting in visible deformation
- the present invention relates to a method for reinforcing a structure, a structure, and a material for preventing the structure from collapsing and causing serious damage to people inside and around the property, even afterwards.
- the cost, time, and material required for the construction may reach a large percentage, if not equal, of the new construction cost, and the cost burden may not be tolerated.
- skilled workers such as welders, rebars, and finishers, which are difficult to secure, are often required. Therefore, even if the existing structure is known to be highly dangerous due to aging, design based on the old standard, sudden external damage such as an earthquake, etc., economic and physical constraints In many cases, reinforcement could not be performed.
- an emergency risk assessment after a catastrophic disaster such as an earthquake it is safe because an investigator who has entered the structure is involved in the collapse of the structure due to aftershocks etc.
- FIG. 21 shows a typical load acting on a column 1, which is a typical structural member, and a corresponding displacement.
- load application those that act on the ends and those that act on the entire member in a concentrated or distributed manner.
- loads force and moment.
- Figure 21 shows only the typical ones.
- FIG. 22 shows the relationship between the load acting on the member shown in FIG. 21 and the displacement in relation to the above conventional method.
- the present invention has been made to achieve the above-mentioned object, and the apparent volume expands due to destruction of materials such as concrete, wood, soil, and bricks constituting various members including structural members. Utilizing this property, it is elastically constrained by a high ductility material (high ductility coating material) installed around various members including structural members, delaying the progress of fracture and causing sudden external force. After stopping, the construction is characterized by being able to share the weight of the construct and generally retain its shape.
- the apparent volume here refers to the volume of the part surrounded by the surface (envelope surface) that smoothly wraps the member end surface and the member side surface. As shown in FIG.
- the first invention is to dispose a high ductility material on the outer peripheral surface of a member in a building, restrain the apparent volume expansion accompanying the destruction of the member by the high ductility material, and prevent the destruction.
- Control has a structural feature.
- a high ductility material is installed on the outer peripheral surface of the member, and the apparent ductility caused by the destruction of the member is caused by the high ductility material.
- the elastic restraint can be freely adjusted.
- the high ductility material a material formed of a fiber-based or rubber-based sheet material (including a belt-shaped sheet material) can be suitably used.
- the core material and the high ductility material wound in a roll shape around the core material at least two or more types of the width of the high ductility material in the longitudinal direction of one surface of the high ductility material are used.
- the high ductility material covers the member in a bag shape in consideration of the installation condition of the member to be covered, restrictions on construction, and the like. or spirally wound or rolled, can be installed in or Nurigi by appropriate means such as to blow the viscous material of the rubber-based or resin-based (and the first and any of the second In the invention, the above member and If the high ductility material (coating material) is provided via a void or a weak layer between the above, the disadvantage that the high ductility material (coating material) is directly broken by the member can be avoided. The elastic restraining effect of the high ductility material (coating material) can be more reliably exerted.
- the high ductility material (coating material) is elastically interposed with the above-mentioned voids or weak layers so that the apparent volume of the member is elastically maintained while maintaining an envelope surface against various types of fracture modes of the member.
- the expansion can be more reliably restrained (in FIG. 23 (b), there is a gap t between the member 15 and the envelope surface 10).
- the fourth invention (method) is to fix a highly ductile covering material made of a material having a lower elastic modulus than that of a steel bar to the outer peripheral surface of an existing column supporting a structure, thereby to improve the deformation of the column.
- the high ductility coating material includes a plurality of circling cores arranged at predetermined intervals in the vertical direction of the column, and a plurality of circling cores are disposed adjacent to each other. It can be formed of a bellows-like reinforcing material which is integrally connected in a vertical direction with a fibrous or rubber-based sheet material and is continuous.
- the fifth invention (method) is a material having a lower elastic coefficient than a band rebar on the inner peripheral surface side of a decorative enclosing wall material that is arranged around an existing pillar supporting a structure with an air gap therebetween.
- a high-ductility covering material made of the following is installed to hold the load of the column after deformation, and in this case, the high-ductility covering material is vertically spaced at predetermined intervals through the gap.
- the surrounding core material is arranged in multiple stages, and the adjacent surrounding core materials are integrally connected in the vertical direction with a fiber or rubber-based sheet material, and are formed by a bellows-like reinforcing material.
- the sixth invention (structure) has a structural feature in that a high ductility coating material made of a material having a lower elastic modulus than a steel bar is fixed to the outer peripheral surface of a column supporting a structure.
- the high ductility coating material is a fiber-based or rubber-based material that integrally connects the surrounding core materials that are arranged in multiple stages at predetermined intervals in the vertical direction of the column and adjacent core materials in the vertical direction.
- a bellows-like reinforcing material continuously formed with the above sheet material can be suitably used.
- the seventh invention (structure) is based on the fact that a material having a lower elastic modulus than that of a steel bar is provided on the inner peripheral surface side of a decorative frame material which is arranged around a pillar supporting a structure with an air gap therebetween.
- FIG. 1 shows an example of the structure of a high ductility material used when the present invention is applied to a new or existing pillar whose structure is mainly made of concrete. It is the whole perspective view shown.
- FIG. 1 shows an example of the structure of a high ductility material used when the present invention is applied to a new or existing pillar whose structure is mainly made of concrete. It is the whole perspective view shown.
- FIG. 2 is a cross-sectional view of an essential part showing an application example of the present invention, taking as an example the wall of an existing structural member whose main component is a concrete structure, and FIG. Among them, (a) shows a state where high ductility materials are separately arranged on both outer surfaces of the wall, and (b) shows a state where a connecting cord for connecting high ductility materials is inserted. (C) shows a state in which necessary ducts are provided, and (c) shows a state in which high-ductility materials are connected to each other by a connecting string material inserted through the through-holes.
- FIG. 4 is an overall perspective view showing another example of a state in which a highly ductile material is spirally wound.
- FIG. 5 is an explanatory view schematically showing a winding state of a high ductility material in another example shown in FIG.
- FIG. 6 is an explanatory view showing one example of a roll-shaped core wound high ductility material according to the present invention.
- FIG. 7 is an explanatory view showing a state in which the high ductility material is wound in a triple roll form, in which (a) is a perspective view of a main part, and (b) is a cross-sectional view of (a). Shown respectively.
- FIG. 8 is an overall perspective view showing a state when the example shown in FIG. 7 is divided into three parts.
- FIG. 9 is a schematic perspective view showing another example of the present invention, in which (a) shows an arrangement relationship between an existing column and a high ductile covering material, and (b) shows a case where a high ductile covering material is wound around a column. The state after the above is shown.
- FIG. 10 is an explanatory view showing still another example of the present invention, in which (a) is a schematic perspective view, and (b) is a cross-sectional view taken along line AA of (a). The figures are shown respectively.
- FIG. 11 is a perspective view of an essential part showing an example of a case where the highly ductile covering material shown in FIG. 10 is formed by a bellows-like reinforcing material.
- FIG. 12 is an explanatory diagram of a state of a building (building) to which the present invention is applied, in which (a) shows a state before collapse and (b) shows a state after collapse.
- FIG. 11 is a perspective view of an essential part showing an example of a case where the highly ductile covering material shown in FIG. 10 is formed by a bellows-like reinforcing material.
- FIG. 12 is an explanatory diagram of a state of a building (building) to which the present invention is applied, in which (a) shows a state before collapse and (b)
- FIG. 13 is an explanatory view of a state in which a member (structural member) to which the present invention is applied is a column, in which (a) shows a state before destruction, and (b) shows a state after destruction, respectively.
- FIGS. 14A and 14B are diagrams illustrating a state in which a member (structural member) to which the present invention is applied is a beam and is subjected to load and deformation
- FIG. 14B is a diagram illustrating a state where the member is a floor.
- (c) is an explanatory view of the state after receiving the load and deformation when the wall is used.
- FIG. 15 is a graph showing a deformation behavior until a member (structural member) to which the present invention is applied is a column and is deformed and destroyed.
- FIG. 16 is a graph showing the behavior before a member (structural member) is deformed and destroyed when the member (structural member) is a column, comparing the conventional structure with the structure of the present invention.
- FIG. 17 is a state explanatory view showing a state in which the member (structural member) to which the present invention is applied is a column, in which the member is deformed. In FIG. Later, (c) shows the destroyed state, respectively.
- FIG. 18 is a schematic explanatory view showing a three-axis test apparatus widely used in the field of soil mechanics. Fig.
- FIG. 19 is an explanatory diagram showing the relationship between force and displacement acting on a column as a building and a member (structural member) during an earthquake as (a) and (b).
- FIG. 20 is a graph showing the state of absorbed energy per cycle of a pillar as a member (structural member), in which (a) shows the case of a conventional pillar and (b) shows the present invention. The cases of pillars with are shown below.
- FIG. 21 is an explanatory view showing a load acting on a column as a member (structural member) and a direction in which displacement is received.
- Fig. 22 is a graph showing the deformation behavior of the column as a member (structural member) before and after reinforcement by the conventional structure when the load and displacement shown in Fig. 20 occur.
- FIG. 23 shows the phenomenon that the apparent volume increases with the destruction of the member, with (a) before the destruction and (b) after the destruction.
- FIG. 24 is a state explanatory view showing a state in which a column as a member (structural member) corresponding to the deformation behavior shown in FIG. 21 is deformed.
- (B) shows the state after the start of deformation, and
- (c) shows the broken state.
- FIG. 25 is an explanatory view showing a state after a beam as a member (structural member) to which the present invention is not applied is deformed.
- a high ductility material 21 has a sheet portion 22 provided with an appropriate length and width in a main body, and one side edge portion 2 of which abuts each other in the circumferential direction. 3 and the other side edge portion 24.
- a core string 25 is arranged through each of the one side edge 23 and the other side edge 24 of the seat portion 22 along the longitudinal width direction thereof.
- the one side edge portion 23 and the other side edge portion 24 are separately reinforced by the core string 25, and the durability in the tensile direction can be increased.
- insertion holes 26 for the connecting cord material 30 are provided at predetermined intervals along the length direction thereof. Is provided.
- an appropriate reinforcing member 27 such as an eyelet 28 is attached to each of the insertion holes 26, and the periphery of each of the through holes 26 is separately reinforced by the reinforcing member 27.
- the connecting cord 30 can be securely fixed.
- at least one of the one side edge 23 and the other side edge 24 of the sheet portion 22, in the illustrated example, the one side edge 23 has a vertical width of the sheet portion 22.
- a tongue-shaped patch cloth portion 29 having a vertical width approximately the same as that of the side edge portion 23 is sewn to the back side along the length direction of the side edge portion 23.
- the space between the side edge portion 23 and the other side edge portion 24 can be covered from the back side.
- the patch portion 29 is disposed separately on one side edge 23 and the other side edge 24, and the one side edge 23 and the other side edge 2 4 may be alternately covered with a double structure from the back side.
- the sheet part 22 and the patch part 29 forming the high ductility material 21 are made of a material that is uniform in the circumferential direction and the vertical direction, and is particularly ductile and has an initial elastic modulus of iron or concrete.
- Fiber materials, rubber materials, and the like, which are smaller than the above, can be suitably used.
- synthetic fiber materials for example, “Tresheet” (trade name, manufactured by Toray Industries, Inc.), etc.
- rubber materials for example, manufactured by Princeton Co., Ltd.
- a sheet material comprising a product name of “Zioliner” or the like can be suitably used.
- the highly ductile material 21 is, for example, as shown in FIG. 13 (a), which is erected to support the floor 12 of the building 11 shown schematically in FIG.
- a patch cloth portion 29 is located between the column 13 and the seat portion 22, and one side edge 2 3 and the other side edge portion 24 can be wound in an arrangement relationship where they abut each other.
- the high ductility material 21 wound on the pillar 13 as the structural member 15 passes through the insertion holes 26 of the one side edge 23 and the other side edge 24.
- the highly ductile material 21 can maintain a state in which the periphery of the column 13 is completely wrapped in a bag shape.
- FIG. 1 shows an application example of the present invention in a case where the member 15 is a pillar 13 mainly made of concrete or wood, earth, brick, or the like, but the structure 11 is under construction.
- the highly ductile material 21 can be wound around its peripheral surface by covering it in a bag shape.
- connection structure is provided with a structure which can be integrally fastened so that the one side edge portion 23 and the other side edge portion 24 are not separated when a load is received, FIG. Not limited to the examples shown, such as sutures and joints, etc. Any known fastening structure can be appropriately adopted.
- FIGS. 2 (a) to 2 (c) are essential figures showing examples of application of the present invention, taking as an example the wall 17 which is an existing structural member whose main component is concrete, where the member 15 of the building 11 is concrete.
- FIG. According to Fig. 2 (a), the building (building) shown in Fig. 12 (a) 1 1 side 15a of the wall 17 partitioning the space 19 of 1 1 and the other side 15b (A wall 17 under construction can be surrounded by a high-ductility material 21 as shown in Fig. 1.) .).
- the wall 17 is provided with a diameter through which a connecting cord 30 necessary for connecting the high ductility members 21 and 21 can be inserted.
- hole 1 8 guard side 1 5 a and the other side surface 1 5 b and c these through-holes 1 8 provided in each separate as proceeds in the horizontal direction at a predetermined interval between the, in the illustrated example
- a reinforcing member such as an eyelet 28 shown in FIG. 1 in each through hole 18 so as to reinforce the peripheral portion thereof.
- the highly ductile materials 21 and 21 are connected to each other through a connecting cord 30 fixed through the through hole 18 as shown in FIG. 2 (c), for example. Can be reliably connected.
- the connecting cord material 30 connects the high ductility materials 21 and 21 individually to each of the through holes 18 or allows each of the through holes 18 to be inserted one by one as shown in the illustrated example.
- the high ductility materials 21 and 21 may be connected to each other by sewing.
- Fig. 2 shows an example of a wall 17 that is a structural member whose main material is concrete or wood, earth, brick, etc., if the member 15 is an existing one.
- the beam (girder) 16 shown in FIG. 12 (a) it is possible to reliably connect the high ductility members 21 and 21 to each other via the connecting cord 30. it can.
- FIG. 3 (a) shows the tape wound structure of the grip of the tennis racket against the members (15 in the example shown) of the elastic strip-shaped high-ductility material 21 applied to the building (in the example shown, the column 13).
- an eyelet as shown in FIG. 1 is formed on the side of the highly ductile material 21 so as to adopt, for example, a method for fixing an end portion of an elastic wrapper for medical use. It may be fixed by passing a string through the cable.
- a method for fixing an end portion of an elastic wrapper for medical use It may be fixed by passing a string through the cable.
- FIG. 4 is an explanatory view showing another example of the spiral winding pattern shown in FIG. 3. In this case, as shown in FIG.
- the windings are sequentially increased in double ( ⁇ in the figure) and triple (3 in the figure) while increasing the number of windings in the stacking part
- the required range is maintained while maintaining the quadruple state (4 in the figure) stacked with the specified maximum number of turns.
- the lower end 33 side is triple wound (3 in the figure) and doubled (2 in the figure) to form a single winding (1 in the figure).
- the highly ductile material 21 is arranged at a distance from the member 15 to make it easy to understand how to wind it. Will be done.
- the number of rolls is the number of turns obtained by subtracting 1 from the maximum spiral number of turns N.
- the ends can be wound in triple rolls with the maximum spiral number N reduced by 4 from 1.
- the ends can be wound from the maximum number of windings of N to 2N-1 single windings. Since stress concentrates on the ends (the upper end 32 and the lower end 33) of the member 15, the safety margin can be given to the member 15 by doing so.
- the high ductile material 21 wound spirally can obtain a tensile strength (strength) T more than required on one side and the other side along the length direction of the member 15.
- FIG. 6 shows that the spiral winding pattern shown in FIG. 4 can be suitably used when the maximum number of windings (the number of laminations) is N as shown in FIG.
- the high ductility material 21 has 1 Z 2 (maximum width), 1/3, 1/4,... 1 ZN, so that its width W can be equally divided in its length direction.
- a plurality of division lines 50 up to about the minimum width at the time of equal division are drawn between the side edges 21 b of the highly ductile material 21.
- the maximum number of turns is N
- the division line 50 is color-coded or different in line type so that it can be easily distinguished from each other, or has a ridge shape (convex portion) so that it can be distinguished by tactile sensation. It is advisable to paint it with paint. As shown in FIG.
- the high ductility material 21 wound in a roll shape as shown in FIG. 6 has a width corresponding to one round from the upper end (or from the lower end 33) of the member 15 as shown in FIG. W of 1 Z 4 (w:) wound spirally to the length direction so that displaced one at least over its entire circumference in the 1 4 (w 2) as a width within remains of the width W winding end fold As mentioned above, it is wound up to quadruple.
- FIGS. 4 to 5 show an example in which the maximum number of turns of the high ductility material 21 is quadruple, and when the maximum number of turns (the number of layers) is an arbitrary N. Meanwhile, the highly ductile material 21 shown in FIG. 4 is spirally wound with a displacement of 1 ZN in one round.
- FIG. 7 is an explanatory view showing a state in which the high ductility material 21 is wound around a member 15 such as an existing pillar 13 or a newly built pillar 13 in a triple roll form.
- A shows a perspective view of a main part
- (b) shows a cross-sectional view of (a).
- the high ductility material 21 is made of a fibrous or rubber-based band-shaped sheet material, and at least the starting end 42 in the circumferential direction is attached to the outer peripheral surface of the member 15 with the adhesive 3.
- the start end portion 42 and the second facing portion 44 located thereon are similarly bonded via an adhesive 35a.
- the facing portions 45 and 46 which are overlapped on the end portion 43 side of the high ductility material 21 are also joined to each other via the adhesive 35 to form a triple-wound layer. It is tightly wound around the mouth.
- the adhesive 35a used for the starting end 42 is used for temporarily attaching the high ductility material 21 to the member 15 and is used to bond the high ductility materials 21 and 21 to each other. It is not necessary to use the same material as the adhesive 35 to be bonded.
- the adhesive 35 when used as the adhesive 35 a, measures such as narrowing the bonding surface so that the highly ductile material 21 is not excessively bonded to the member 15 are taken. Need to be In this case, the high-ductility material 21 wound in a roll around the outer peripheral surface of the member 15 is an intermediate layer, and in the illustrated example, the start end 42 and the end end 43 of the high-ductility material 21 are located. Facing the first and second sheets of high ductility material 2 1 located on the side opposite to the surface on which it is facing 4 7, 4 8 A single strip-shaped area where mutual positions are located is oriented in the length direction of member 15 It is wound by bonding using an adhesive 35. FIG.
- the number of turns required to obtain the required strength is not limited to this, and the optimum number of turns N is the required strength T and the allowable distortion X shown in a calculation formula described later. Is determined from That is, if the material strength per piece of the high ductility material 21 is T and the strain at which this strength is expressed is S i, the number of turns required to obtain the required strength is as follows: .
- N! T / T! 1) Also, the allowable distortion X.
- N 2 (TSJ) / (T j Xo) 2)
- the highly ductile material 21 is formed by spraying a rubber-based material or a viscous material, for example, the above calculation may be performed based on the relationship between the tension and the strain of each material.
- FIG. 8 shows an example of installation when the inner height of the member 15 is larger than the width of the rolled sheet-like high ductility material 21 as shown in Fig. 6, for example.
- Each of the high ductility members 21 is wound with a band-shaped adhesive 35 in the length direction of the member 15 as shown in FIG. That is, the high ductility material 21 is first wound around the central portion 34 of the member 15 in the manner shown in FIG. 7 and the upper edge portion 51 of the high ductility material 21 located at the central portion 34.
- the high ductility material 21 While joining the lower edge 5 2 with the adhesive 35, the high ductility material 21 is attached to the upper end 32 of the member 15, and the lower edge 52 of the high ductility material 2 1 at the center 34.
- the high-ductility material 21 is wound around the lower end 33 of the member 15 while joining the upper edge 51 with the adhesive 35.
- the width of the bonding surface is specifically determined on condition that the bonding strength of the bonding portion is equal to or more than the required tensile tension T in the circumferential direction.
- an appropriate fixing method such as sewing or welding can be used.
- the number of turns N of the high ductility material 21 required in this case is determined in the same manner as in the example shown in FIG.
- the highly ductile material 21 may be covered in a bag shape or spirally wound on the member 15 in consideration of the installation condition of the member 15 to be covered, restrictions on construction, and the like.
- Rubber-based such as silicone rubber or resin-based such as vinyl chloride (including those containing short fibers made of various materials). 3) can be installed by applying a viscous material.
- an adhesive layer is formed on at least one surface in advance, and the adhesive layer is formed.
- the adhesive layer can be formed on both surfaces of the high ductility material 21 if necessary.
- the high ductility material 21 when installed with a coating material obtained by applying a rubber-based or resin-based viscous material, it can be applied manually, but if workability is taken into consideration. It is preferable to spray and apply a rubber-based or resin-based viscous material using an appropriate spraying device. Further, if a part of the member 15 is already damaged, or if the stress is concentrated and a part of the member 15 is predicted to be broken, the surrounding area including the damaged part or the predicted part of the part is damaged.
- the high ductility material 21 may be partially covered and installed.
- a highly ductile material 21 made of a fiber material having an adhesive layer or a highly ductile material 21 coated with a rubbery or resinous viscous material can be particularly preferably used.
- the high ductility material 21 keeps forming the envelope surface 10 even after the member 15 is broken, which is an important factor in restraining the apparent volume expansion accompanying the breaking of the member 15 and controlling the breaking. This is a necessary condition. This is made possible by creating a gap t between the envelope surface 10 and the broken piece 9 after being broken, as is apparent from FIG. 23 (b).
- the envelope 10 Is formed smoothly. Furthermore, in addition to the method and structure illustrated in FIGS. 4 to 8, when forming the highly ductile material 21 by a coating method such as spraying, without forming a gap between the member 15 and the high ductility material 21. In the case of direct bonding, after the member 15 is broken by this bonding layer, the highly ductile material 21 continues to be completely bonded to the outer periphery of the broken pieces 9 and 9 shown in FIG. 22 (b). In other words, it is necessary to keep in mind that the highly ductile material 21 is likely to be broken by the broken pieces 9 due to the generation of acute angles and stress concentration.
- FIGS. 9 (a) and 9 (b) are schematic perspective views showing an example of the third invention in the present invention, and (a) of FIG.
- the highly ductile covering material used in this case is a synthetic fiber material which is rich in ductility and has a strength capable of holding a load (for example, “Tresheet” (trade name, manufactured by Toray Industries, Inc.) ) Or a rubber material (for example, “Geoliner” manufactured by Prideston Co., Ltd.) can be suitably used.
- the high ductility coating material 121 must keep the outer peripheral surface 14 of the column 13 completely wrapped in a bag shape. Therefore, the high ductility coating material 121 after being wrapped on the column 13 should be used so that the butt ends 121 a and 122 b are not separated from each other when a load is applied.
- the sheet material 1 2 2 is a synthetic fiber material
- the butt ends 1 2 1 a and 1 2 1 b are sewed by applying a patch cloth to the back side of each other, and the sheet material 1 2 2 is made of a rubber material. If so, the butt ends 12 1a and 12 lb will be joined together by applying rubber to the back side of each other, or by heat sealing, etc., and they will be fixed together.
- the high ductility coating material 122 is preferably wound around the entire length of the column 13, but may be wound around the remaining part except the upper part if necessary and fixed.
- FIGS. 10 (a) and (b) are explanatory views showing an example of the fourth invention in the present invention, wherein (a) is a schematic perspective view, and (b) is (a) The cross-sectional views in the direction of arrows Y—Y in FIG.
- the pillars 13 supporting the floors 12 etc. of the building (building) 11 shown in FIG. 12 (a) are provided with a marble pattern through the voids 17 and the like.
- the formed decorative surrounding wall material 115 By arranging the formed decorative surrounding wall material 115 around, the pillar 13 itself is in a concealed state.
- a material with a lower elastic modulus than the steel bar for example, it is homogeneous in the circumferential direction and the vertical direction, and has a very low initial modulus. It is formed into a bag using synthetic fiber material (for example, Toray Co., Ltd. product name "Trecit") or rubber material (for example, Princeton product name "Georina I").
- FIG. 11 shows another example of the high ductility coating material 13 1 used in the present invention.
- a column 13 is provided around a column 13 with a void 17 interposed therebetween.
- the surrounding core material 1 33 formed of reinforcing steel or ring-shaped elastic material with an appropriate outside diameter, and the adjacent surrounding core materials 1, 3, 3, 13 are connected by sewing together in the vertical direction.
- the formed bellows-like reinforcing material 1 32 is used.
- the required number of circling cores 133 arranged in the vertical direction is determined by the relationship with the length of the pillars 13.
- band-like sheet materials 134 can be arranged separately and connected in the vertical direction while leaving an interval as shown in Fig. 11.
- the high ductility coating material 131 can be used in place of the high ductility coating material 121.
- FIG. 12 (a) the existing member 15 supporting the building (building) 11, that is, before reinforcing the pillar 12 as a structural member, and the present invention shown in FIG.
- Fig. 15 showing the deformation behavior before and after reinforcement
- the highly ductile material 21 after reinforcement can provide the function of supporting the upper load that can support the required load.
- the pillar 13 is destroyed as shown in FIG. 12 (b) and the building (building) 11 is collapsed. Also, a space 19 can be secured between the floors 12 and 12.
- the outer curb applied to the structural member 15 is reduced.
- a space 19 where humans can escape from being crushed can be secured, and a safe failsafe effect can be obtained.
- Securing such a space 19 can be achieved by using materials such as concrete, gravel, soil, bricks, etc., which constitute members 15 such as structural members of the building 11 and are widely used as an element sharing the compressive force.
- a change of the structural member or the like 15 to expand the apparent volume can be restrained by the highly ductile covering material 21, thereby constituting the structural member or the like 15 as a result. Even after the material is broken, the member 15 can hold the external force to effectively prevent the structure 11 from being significantly deformed and collapsed.
- a beam (girder) 16 which is one of the members (structural members) 15 in FIG. 12 (a), as shown in FIG. 14 (a)
- the beam (girder) 16 on the compression side is compressed and fractured by an external force such as an earthquake, it is held in a highly ductile material 21 in a bulging state. It is clear that the ability to bear the bending moment can be maintained.
- Fig. 14 (b) shows the case where the structure is applied to the floor 12 which is one of the members (structural members) 15 in Fig. 12 (a).
- Fig. 14 (c) The case where it is applied to wall 17 is shown.
- the high ductility members 21 and 21 are connected by the reinforcing member 27, it is as if cushioning is caused by compressive failure due to an external force such as an earthquake. It turns out that the high ductility material 21 can be held in a state in which a bulge like a team physical education mat is formed.
- the member (structural member) 15 is the floor 12
- the beam 16 mechanism is used, so reinforcing members 27 are installed at each corner of a square with a side of about 1 m, and the member (structure) If the member 15 is a wall 17, the reinforcing member 27 is installed under the same arrangement relationship as the floor 12 because the mechanism of the column 13 is used.
- the spirally or roll-like material is installed.
- the elastic force of the high ductility material 21 applies a compressive force in the circumferential direction to the member 15 be able to. Since the compressive force in the circumferential direction has the effect of restraining the apparent volume expansion of the member 15, it acts to suppress the deformation of the member 15 due to bending, shearing, and compression. As a result, the member 15 can resist bending, shearing and compression even after its fracture.
- the highly ductile covering material 121 is used as in the fourth invention, as shown in Fig. 12 (a), the outer peripheral surface of the existing column 12 supporting the building 11 is constructed. As shown in Fig. 13 (a), the highly ductile coating material 12 1 is wound into a bag shape and fixed as shown in Fig. 13 (a). 3 can be wrapped in a highly ductile covering material 21 to hold the load. In this case, too, as shown in Fig. 15, even if the toughness limit is exceeded, the high-ductility coating material after reinforcement 121 can provide the function of supporting the upper load that can support the required load. After the progress shown in (a) to (c), as shown in Fig.
- the pillars 13 are destroyed and the building (building) 11 collapses, and the floor 12 and the floor 12 remain.
- a space 1 9 can be secured between 1 and 2.
- the decorative wall material 115 is inserted into the existing pillar 13 supporting the building 11 shown in FIG. 12 (a) with a void 117 interposed therebetween as shown in FIG.
- the high-ductility coating material 13 1 1 is installed on the inner peripheral surface 1 16 of the decorative enclosing wall material 1 15
- the deformed column 13 can be wrapped in the high ductility coating material 13 1 to hold the load.
- the high ductility coating material 1 3 1 is formed by arranging the surrounding core materials 1 3 3 in multiple stages at predetermined intervals in the vertical direction via the voids 1 1 7 so that the adjacent surrounding core materials 1 3 3 and 1 It is preferable to form and use a bellows-like reinforcing material 132 which is integrally connected to each other by a sheet material 134 made of a synthetic fiber material or a rubber material in the vertical direction.
- the high ductility coating material 131 can be used in place of the high ductility coating material 121.
- FIG. 16 is a graph showing respective deformation behaviors of the conventional structure and the present invention.
- the strip rebar breaks or comes off and collapses (see the graph shown by ⁇ in the figure).
- the highly ductile material 21 or the highly ductile covering material 121 is wrapped around the column 13 which is one of the members (structural members) 15 in the present invention, the displacement of the highly ductile material 2 starts at the same time as the displacement starts. 1 or high ductility coating material 1 2 1 Although it takes a load, it is found that even if the steel bar breaks or comes off, it can keep the load without collapse (see the graph in Fig. 1). .
- the toughness limit of the column 13 is exceeded.
- the high-ductility coating material 1 3 1 will not be strained, and the high-ductility coating material 3 1 will be loaded only after the steel bar breaks or comes off beyond the toughness limit, but it will not collapse It turns out that the load can be held (see the gram diagram in 3 in the figure).
- the tensile strength of the high ductility material or the high ductility coating material used in the present invention will be specifically described below with calculation examples.
- Fig. 18 shows a three-axis test device widely used in the field of soil mechanics to test the relationship between the axial force of granular material such as soil and debris and the confining pressure in order to clarify such a relationship. It is explanatory drawing shown typically.
- the granular material is filled in a container 5 including a canopy 6 and a bottomed peripheral side surface 7, and an axial force P is applied under a state in which a water pressure W is applied from the side surface 8 via a thin film.
- a water pressure W is applied from the side surface 8 via a thin film.
- T s (DS) / 26)
- W is the total weight of the structure above the floor
- N p is the total number of columns on the floor
- f is the safety factor taking into account the variation in the load capacity per rod. It can be calculated from a plan view of a simple structure. As described above, the required tensile strength of the high ductility material can be calculated. However, from the viewpoint of preventing the excessive deformation of the structure by keeping the circumferential strain of the high ductility material within the allowable value, the required strength T calculated by Equation 7) and the allowable strain of the high ductility material are considered. X. Thus, the required number of turns or the thickness of the high ductility material can be determined in the manner of the above formula 2) or formula 4).
- a sheet material made of a rubber material there is, for example, a synthetic polymer-based vulcanized rubber-based product name “Gioliner” manufactured by Briston Corporation.
- a strength test result of 13.2 N / mm2 was obtained. If this is used with a thickness of about 2.5 cm, the required strength can be obtained.
- the tension and the strain have a non-linear relationship.However, the strain of the highly ductile material should be suppressed within the allowable strain in the same manner as in the above examples, using the formulas 3) and 4). It can be obtained by calculating the required thickness that can be used.
- a synthetic fiber sheet material is used as the high ductility material (high ductility coating material).
- FIG. 20 (a) shows the state of absorbed energy per cycle obtained in the case of no reinforcement at that time and the example of reinforcement by the conventional method
- Fig. 20 (b) is obtained by the present invention.
- FIG. 3 is a graph showing states of absorbed energy per cycle.
- the solid line indicated by 1 indicates a monotonic load
- the area indicated by 2 indicates a repeated load.
- the members (for example, columns 13) 15, such as the structural members reinforced by the present invention have large absorbed energy to withstand large deformation.
- the members reinforced by the present invention (for example, pillars 13) 15 have a large number of absorbed energy per cycle, and therefore have a smaller number of cycles compared to unreinforced structures or structures reinforced by the conventional method, that is, The vibration damping effect of terminating the vibration in a short time can be obtained.
- the upper limit of the load transmitted to the surrounding area is suppressed, and large deformation and strain can be generated under this load.
- sudden external forces such as an earthquake It can also provide a so-called seismic isolation effect that limits the amount of input to the building c
- the present invention can also be applied to emergency rehabilitation work until the rebuilding of a building or necessary rehabilitation work is performed.
- the present invention is not only effective as a method for preventing collapse when performing building demolition work, but also requires a long period of time for reinforcement work using the conventional method, and it is necessary to compare the part where reinforcement has been completed with the part that has not been reinforced It can also contribute effectively as an emergency measure against an increase in danger during an earthquake when there is a strong imbalance between them.
- the dimensions and material strength specifications of various members including the structural members constituting the building can be reduced, so that the construction cost can be reduced as compared with the conventional method.
- the present invention can obtain a collapsing prevention effect without removing the mold after using it as a fabric mold at the time of placing concrete.
- a high ductility material or a high ductility coating material is fixed to various members including a structural member in a structure. Burdens However, even if the steel bars are broken or come off and the structure collapses, the load can be supported while securing a space between the ceiling and the floor or between the floors, thus providing a fail-safe effect that is effective in rescuing human lives in the event of an earthquake. You can get it.
- the member can have a function of supporting the weight of the structure, which is larger than that of a conventional reinforcing method or no reinforcement. Vibration energy can be absorbed, and a vibration damping effect can be obtained that suppresses the vibration of structures due to earthquake motion. Furthermore, by controlling the destruction of members, the upper limit of the load transmitted to the surroundings is suppressed, and large deformation and strain can be generated under this load. A so-called seismic isolation effect, which limits the amount input to the system, can also be obtained.
- the present invention is not only effective as a method of preventing collapse when performing building demolition work, but also takes a long time to reinforce construction by the conventional method, so that a space between a reinforced portion and a non-reinforced portion is required. It can also contribute effectively as an emergency measure against an increase in the danger caused by an earthquake in a situation where strong imbalance is occurring.
- the present invention can be suitably applied to emergency rehabilitation work until the rebuilding of a building or necessary rehabilitation work is performed.
- the installation work cost can be reduced because simple installation can be performed in a short time, and the dimensions and material strength specifications of various members including structural members can be reduced to reduce material cost. Significantly reduced Therefore, the construction cost of the structure itself can be reduced compared to the conventional method.
- the present invention it is possible to easily and quickly perform the construction without requiring a skilled worker, and it is also possible to easily perform the construction on a partially damaged member. For this reason, by stockpiling high ductility material or high ductility covering material and adhesives and other fixing members in advance, emergency reinforcement necessary for large-scale structures in the event of a sudden disaster such as an earthquake can be quickly implemented. It can be carried out. In addition, by performing construction in parallel with the emergency risk assessment, even if the judge is involved in the collapse of the structure due to aftershocks etc., the risk of injury or death is greatly reduced. be able to.
- the high ductility coating will not be stressed until the column's toughness limit is exceeded, and the ductility will not be exceeded.
- the high ductility cladding is only loaded after the steel bar breaks or comes off, even after the building collapses, the load can be supported while securing a space between the ceiling and the floor or between the upper and lower floors. It can be effectively contributed to saving lives.
- the roll-shaped core-wound high-ductility material according to the present invention is used, the maximum number of spiral turns of the member can be easily grasped without using a measuring instrument or the like. Can be.
- Such simple construction means that not only can new and existing components be swiftly and accurately reinforced, but they can also be used effectively as a stockpile that can respond immediately in the event of an emergency. are doing. sand That is, the number of turns of the high ductility material on the member is determined by the maximum load to be supported by the member, but the number of turns varies depending on the applied structure. Even in such a case, the use of the rolled core-wound high-ductility material according to the present invention allows the same high-ductility material to be used immediately from single winding to multiple windings. It can be stored without questioning the relationship and can be immediately applied to the structures in the event of a disaster.
- each division line is drawn so that it can be distinguished visually or tactilely, it is possible to easily distinguish the individual division line at the construction site, and furthermore, the division line is formed by the convex part
- the end of the high ductility material along the convex portion, it is possible to more reliably and easily wind the material, thereby effectively contributing to the improvement of work efficiency.
- the facing portions of the high ductility material in the longitudinal direction of the member are fixed with an adhesive at a rate of one place per circumference.
- the present invention can be used for structures and the like constructed of concrete, wood, soil, brick, and the like.
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Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00985908A EP1258579A4 (en) | 1999-12-27 | 2000-12-26 | METHOD, MATERIAL AND STRUCTURE FOR BUILDING REINFORCEMENT |
US10/089,108 US6964141B2 (en) | 1999-12-27 | 2000-12-26 | Building reinforcing method, material, and structure |
US11/209,385 US20050284032A1 (en) | 1999-12-27 | 2005-08-22 | Building reinforcing method, material and structure |
Applications Claiming Priority (8)
Application Number | Priority Date | Filing Date | Title |
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JP11/370614 | 1999-12-27 | ||
JP37061499 | 1999-12-27 | ||
JP2000/121405 | 2000-04-21 | ||
JP2000121405 | 2000-04-21 | ||
JP2000/147916 | 2000-05-19 | ||
JP2000147916 | 2000-05-19 | ||
JP2000324464A JP3484156B2 (ja) | 1999-12-27 | 2000-10-24 | 構築物の補強方法及びその構造 |
JP2000/324464 | 2000-10-24 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US11/209,385 Continuation US20050284032A1 (en) | 1999-12-27 | 2005-08-22 | Building reinforcing method, material and structure |
Publications (1)
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WO2001048337A1 true WO2001048337A1 (fr) | 2001-07-05 |
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ID=27480844
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Application Number | Title | Priority Date | Filing Date |
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PCT/JP2000/009265 WO2001048337A1 (fr) | 1999-12-27 | 2000-12-26 | Procede de renforcement de batiment, materiau et structure |
Country Status (6)
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US (2) | US6964141B2 (ja) |
EP (1) | EP1258579A4 (ja) |
JP (1) | JP3484156B2 (ja) |
CN (1) | CN1529783A (ja) |
TW (1) | TW464720B (ja) |
WO (1) | WO2001048337A1 (ja) |
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- 2000-10-24 JP JP2000324464A patent/JP3484156B2/ja not_active Expired - Fee Related
- 2000-12-26 WO PCT/JP2000/009265 patent/WO2001048337A1/ja active Search and Examination
- 2000-12-26 CN CNA008127867A patent/CN1529783A/zh active Pending
- 2000-12-26 TW TW89127852A patent/TW464720B/zh not_active IP Right Cessation
- 2000-12-26 US US10/089,108 patent/US6964141B2/en not_active Expired - Lifetime
- 2000-12-26 EP EP00985908A patent/EP1258579A4/en not_active Withdrawn
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Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1437459A1 (en) * | 2001-09-25 | 2004-07-14 | Structural Quality Assurance, Inc. | Reinforcement material and reinforcement structure of structure and method of designing reinforcement material |
JPWO2003027414A1 (ja) * | 2001-09-25 | 2005-01-06 | 構造品質保証研究所株式会社 | 構造物の補強構造、補強方法、免震構造、免震方法、補強材 |
EP1437459A4 (en) * | 2001-09-25 | 2005-07-06 | Structural Quality Assurance I | ARMATURE MATERIAL AND STRUCTURE STRUCTURE OF STRUCTURE AND METHOD FOR DESIGNING REINFORCING MATERIAL |
RU2460861C1 (ru) * | 2011-02-11 | 2012-09-10 | Федеральное государственное образовательное учреждение высшего профессионального образования "Кубанский государственный аграрный университет" | Способ реконструкции промышленных и гражданских зданий |
US9863708B2 (en) | 2014-05-05 | 2018-01-09 | Refractory Intellectual Property Gmbh & Co. Kg | Refractory ceramic gas purging element |
CN114215563A (zh) * | 2021-11-26 | 2022-03-22 | 天地科技股份有限公司 | 墩柱滑移紧箍方法、装置及墩柱组件 |
CN114215563B (zh) * | 2021-11-26 | 2023-12-22 | 天地科技股份有限公司 | 墩柱滑移紧箍方法、装置及墩柱组件 |
Also Published As
Publication number | Publication date |
---|---|
US20030089063A1 (en) | 2003-05-15 |
US20050284032A1 (en) | 2005-12-29 |
EP1258579A1 (en) | 2002-11-20 |
EP1258579A4 (en) | 2005-08-10 |
JP3484156B2 (ja) | 2004-01-06 |
TW464720B (en) | 2001-11-21 |
US6964141B2 (en) | 2005-11-15 |
CN1529783A (zh) | 2004-09-15 |
JP2002038726A (ja) | 2002-02-06 |
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