JPH09228658A - Earthquake-resisting reinforcing method of existing building by using woody group member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out earthquake-resisting reinforcement without damaging existing columns and beams by joining the woody member of an existing building with a joining member, and bonding and seaming the openings of the frames of the existing building and the woody member. SOLUTION: Glued laminated woods 9 are placed along columns and the beams of an upper floor and bonded, or irregularities 11 are formed to existing slabs 10 and floor glued laminated woods 12 are crossed and joined. Reinforcing glued laminated woods 13, on which gussets 14 are placed along by integral molding and blocking and connected by bolts, etc., may also be installed to the columns, the beams and the slabs 10 so as to further form a projecting opening in an upper section. The structural materials of a metallic group and a concrete group are incorporated into the woody materials, and composite structure may also be formed by a carbon resin, resin fibers etc. Accordingly, concrete need not be scraped off more than required because reinforcing members are not used as the frames of steel frames, and the reinforcing members can be carried in easily because of light weight.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of seismic retrofitting an existing building using a wooden frame member.

[0002]

2. Description of the Related Art Seismic retrofitting methods for existing buildings that have been used in the past have been to add steel frames for new seismic retrofitting to columns, beams, and seismic walls, which are the main frames of buildings. , A truss was installed between columns and beams, and a new seismic wall was installed.

When a concrete earthquake-resistant wall is newly provided or when a reinforcing steel frame is added to a column or a beam frame, the surface to be added is added to the existing columns or beams in order to add them. After arranging binding aids such as chip anchor bolts, mortar is filled or cast-in-place concrete is installed in the gap between the existing frame of columns and beams and the reinforcing steel frame to construct the existing frame and reinforcing steel frame. The frame was integrated.

FIG. 3 is a view showing an example in which an existing column or beam frame is aseismically reinforced with a steel frame.

In the figure, the shaded area shows the gouging of the outer circumferences of the existing columns 2 and beams 3 for fitting the steel frame 1 assembled in the truss. An anchor 4 is provided at the gouged portion, a reinforcing bar 5 is arranged, and a mortar 6 is filled in a gap between the reinforcing frame 5 and the steel frame 1 to be integrated with existing columns 2 and beams 3. After applying the finishing base by the furring strip 7 to the wall, a board is stretched from above and a finishing cloth or the like is further stretched.

FIG. 4 is a plan view in which a concrete wall 8 is similarly installed between existing columns 2.

FIG. 5 is an elevational view of FIG. 4, showing an existing post 2
Is damaged by gouging as in the case of FIG.
When constructing concrete earthquake-resistant walls, anchors 3,
Needless to say, in addition to the reinforcing bars 4, supporting work and formwork (not shown) are required, which makes the construction difficult. After pouring concrete, the surface is generally ground and plastered.

The conventional construction method has the following problems.

Since the reinforcing member is a steel frame, if it cannot be accommodated on site, the concrete around the existing columns or beams had to be scraped off more than necessary. That will damage the existing columns and beams.

In order to bring it into a building due to its heavy weight, it may not be possible to carry it in with an existing lifting device.

A fireproof coating may be required on the steel frame.

It is necessary to apply a groundwork for finishing.

In a concrete wall, lighting and ventilation cannot be planned freely.

A flow line cannot be secured with a concrete wall.

The present invention was created to solve the above problems.

[0016]

[Means for Solving the Problems] A method for seismic strengthening of an existing reinforced concrete structure or steel frame building using a wooden member, in which the wooden member is used as a frame for seismic strengthening , Using the joining members that are usually used for building structures, in the gap between the existing building and the wooden member frame,
The existing building and the wooden frame are integrated with each other by filling with a filler, adhering with an adhesive, or sewing with an anchor bolt for joining.

As the wood member, natural lumber or laminated wood may be used.

As the seismic reinforcement frame, a seismic frame in which a metal or concrete structural member is incorporated in a wooden member may be used.

It is also possible to attach, coat, sandwich, or impregnate carbon fibers or resin fibers to the wood member to form a composite.

It is also possible to use a seismic isolation and vibration control device together with the frame of the wooden member.

Next, the characteristics of the laminated wood will be described.

Naturally, it is of course possible to use natural lumber for the reinforcing frame, but in recent years, large-section laminated lumber has been spotlighted as a wood-based member. This laminated wood is made by sawing logs into several pieces, stacking them, applying heat to dry them, applying a sawing adhesive, stacking them, and compressing and solidifying them. The laminated wood has the same specific gravity as ordinary wood, and has a much higher strength than ordinary wood and a compressive strength equivalent to that of concrete. Since the laminated wood is light in weight, it is easy to bring it to the site, and it has excellent workability such as cutting and drilling on site, and it can be formed into any size and shape, and a fireproof coating can be added. It is a seismic strengthening member that is easier and cheaper to construct than steel aggregates without the need.

[0023]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing an embodiment in which columns and beam frames of an existing building are reinforced by seismic reinforcement with laminated wood.

In order to have the same behavior as the frame of an existing building at the time of an earthquake, and in order to transmit stress and integrate it as a frame, whether the glued wood 9 is attached to the pillars 2 and the beams 3 on the upper floor. The existing slab 10 is provided with irregularities 11 and the floor laminated timbers 12 are joined to each other so that the horizontal force can be transmitted during an earthquake.

The reinforcing laminated member 13 may be attached to the pillar 2, the beam 3 and the slab 10 so as to form a convex opening further upward. The reinforcing laminated member 13 that forms a convex opening on the upper side may be made into a block and joined with a gusset 14 and joined by a bolt or the like, or, of course, integrally formed.

FIG. 2 is a plan view of FIG. An example in which two reinforcing laminated members 13 are provided and a sandwiching member 15 is inserted between them is shown. Needless to say, natural wood may be used instead of the laminated lumber 9, 12, 13.

Further, a skeleton in which a metal-based or concrete-based structural material is incorporated into the wood material can be used.

Further, carbon fiber, resin fiber or the like may be attached to, sandwiched with, or impregnated with a wood-based member to form a composite structure to enhance strength.

Further, since the above wood-based member has extremely good workability, equipment pipes, lighting equipment, etc. can be easily attached. For the purpose of improving the living environment, it is easy to give a more moist scent by utilizing the soft feeling peculiar to the wooden member.

In addition to the seismic reinforcement method of the present invention,
It is also possible to incorporate a vibration control device into the wooden frame and use it together as seismic reinforcement.

[0032]

The effects of the present invention are as follows.

Since the reinforcing member is not a steel frame,
Even if it does not fit on-site, the concrete around existing columns or beams will not be scraped off more than necessary. Therefore, existing pillars and beams are less likely to be damaged.

It is light in weight and can be easily brought into a building. Therefore, in many cases, the existing lifting device can be carried in. It is also a great advantage that the reinforcing laminated wood can be made into blocks.

By considering the burn margin, a fireproof coating is not required unlike steel frames.

It is possible to largely omit the construction of a base for finishing.

Taking advantage of the workability of the wooden member,
Ventilation can be planned freely.

The flow line can be secured by utilizing the workability of the wooden member.

[Brief description of drawings]

FIG. 1 is a diagram showing an example in which columns and beam frames of an existing building are aseismically reinforced with laminated lumber.

FIG. 2 is a plan view of FIG.

FIG. 3 is a diagram showing an example in which a frame structure of existing columns and beams is aseismically reinforced with a steel frame.

FIG. 4 is a plan view in which a concrete wall is constructed between existing columns.

FIG. 5 is an elevation view of FIG. 4;

[Explanation of symbols]

1 ... steel frame, 2 ... column, 3 ... beam, 4 ... anchor,
5 ... Reinforcing bar, 6 ... Mortar, 7 ... Furnace, 8 ... Concrete wall, 9 ... Glued wood, 10 ... Slab, 11 ...
Unevenness, 12 ... Floor laminated wood, 13 ... Reinforced laminated wood, 14 ...
… Gusset, 15… Sandwich laminated wood

Claims (8)

[Claims] 1. A method for seismic strengthening of an existing reinforced concrete structure or steel frame building using a wooden member, wherein the wooden member is used as a frame for seismic strengthening, and the frame of the wooden member is normally joined to a building structure. Using a joining member used for, the gap between the skeleton of the existing building and the wooden member is filled with a filler, bonded with an adhesive, or sewn with an anchor bolt for joining, and the existing building and the wooden member are joined together. A seismic retrofitting method for existing buildings using wooden members, which is characterized by an integrated framework. 2. The seismic retrofitting method for an existing building using a wooden member according to claim 1, wherein natural lumber is used as the wooden member. 3. The method for seismic retrofitting an existing building using a wooden member according to claim 1, wherein laminated wood is used as the wooden member. 4. The seismic strengthening method for an existing building using a wooden member according to claim 1, wherein a seismic strengthening frame in which a metal or concrete structural member is incorporated into a wooden member is used as the seismic strengthening frame. 5. The wood member according to claim 1, wherein the wood member is formed by adhering, coating, sandwiching, or impregnating carbon fiber or resin fiber with the wood member to form a composite. Seismic retrofitting method of existing building used. 6. A seismic retrofitting method for an existing building using a wooden member, characterized in that a seismic isolation and vibration control device is used together with the frame of the wooden member. 7. The seismic retrofitting method for an existing building using a wooden member according to claim 1, wherein the wooden member and a steel member are used in combination. 8. A seismic retrofitting method for an existing building using a wood member according to claim 1, wherein plywood is attached to both side surfaces.