JP2004124522A - Earthquake-resistant reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem that an opening area for daylighting is narrowed when projecting sites from a beam and a column are large and an earthquake-resistant reinforcing structure is installed at a place where an opening is formed. <P>SOLUTION: A frame body 1 is arranged in a rectangular space A formed of a pair of the beams B1 and B2 and a pair of the columns C1 and C2 while braces 11 and 11a are arranged to a frame body 1. Anchor bolts 2, 2a or the like penetrated to frame members 1a, 1b, 1c and 1d constituting the frame body 1 are driven to forming surfaces D1, D2 or the like of the space A so that bolt heads 6, 6a or the like of the anchor bolts 2, 2a or the like are separated from the frame members 1a, 1b, 1c and 1d. Fillers M are injected into openings among the frame members 1a, 1b, 1c and 1d and the forming surfaces D1, D2 or the like. The frame members 1a, 1b, 1c and 1d have at least slender plates 3 and pair of side plates 4, 4a, and anchoring fillers 10 are driven into recesses 8 formed by the slender plates 3 and the side plates 4, 4a. The space A is narrowed by only such a dimension that the thickness of the filler M is added to each width of the sections 4, 4a, and projecting regions from the beams B1 and B2 and the columns C1 and C2 are miniaturized. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a seismic reinforcement structure in a building having a rectangular space surrounded by a pair of adjacent beams and a pair of columns, such as a ramen structure building.
[0002]
[Prior art]
Conventionally, as shown in FIGS. 7 to 11, such a seismic retrofit structure is constructed in a rectangular space a surrounded by a pair of adjacent upper and lower beams b1, b2 and a pair of left and right columns c1, c2. , A plurality of anchor bolts e1, e1a... Are arranged on each of the formation surfaces d1, d2... Of the rectangular space a in the pair of beams b1, b2 and the pair of columns c1, c2, and their base ends are set to the beam b1. , B2 and pillars c1, c2. On the other hand, frame members g1, g2,... Are arranged at positions facing the formation surfaces d1, d2,... Of the rectangular spaces a in the beams b1, b2 and the columns c1, c2, and the beams b1, b2,. The buried bolts i1, i2, i1a, i2a,... Are vertically protruded on the surface facing the columns c1, c2.
Spiral streaks f1, f2... For splitting reinforcement are arranged before or after the frame members g1, g2... Are installed. Finally, mortar m is injected and cast to form beams b1, b2 and columns. Frame members g1, g2,... are integrated with c1, c2.
Each of the frame members g1, g2,... Is composed of an elongated plate portion j and a pair of side plate portions k1, k2 integrally formed on both long sides of the elongated plate portion j, and one of the side plate portions k1 is an elongated plate portion. j, and a central portion of the other side plate portion k2 is integrally fixed to the other long side portion of the elongated plate portion j perpendicularly to the elongated plate portion j, so that the cross section is substantially reduced. It is formed in an h shape. In the frame members g1, g2,..., The protruding portions on the other side of the other side plate portion k2 are perpendicular to the forming surfaces d1, d2,. It is arranged like.
Are provided in the frame members g1, g2,..., And two upper braces v1, v2 inclined to the opposite side are provided. The upper ends of the braces v1, v2 are connected to the upper frame member g1 and the frame members g3, g4 on both sides. The lower ends of the brackets n1 and n2 provided at the intersections are fixed to brackets n3 provided at the center of the lower frame member g2.
[0003]
For earthquakes up to a certain seismic intensity, the two braces v1 and v2 reinforce the seismic resistance, and when an earthquake of an allowable seismic intensity or more occurs, one of the pair of braces v1 and v2 has a tensile force and the other has a compressive force. Acts to absorb energy by controlling the yield of the braces v1 and v2 by tensile yielding or compressive yielding, thereby controlling the shaking of the building.
[0004]
We do not conduct prior art searches at the research and development stage or application stage, and do not know the prior art documents to be included.
[0005]
[Problems to be solved by the invention]
However, in the above-mentioned conventional method, there was a problem that had to be solved as described below.
(1) It is necessary to perform a troublesome work of integrally fixing the buried bolts i1, i2, i1a, i2a to the frame members g1, g2,... And arranging the spiral streaks f1, f2,.
(2) There are anchor bolts e1, e1a ... and buried bolts i1, i2, i1a, i2a ... between the frame members g1, g2 ... and the forming surfaces d1, d2 ..., and the side plate portion k1 inside the rectangular space a. , K2 protrude, the overall thickness h increases, and the rectangular space a becomes narrower. As a result, the daylighting area becomes narrower, and the projecting portions from the beams b1, b2 and the columns c1, c2 look great. Is bad.
[0006]
[Means for Solving the Problems]
In view of the problems (1) and (2) based on the above-described conventional technology, the present invention arranges a rectangular frame in a rectangular space formed by a pair of adjacent upper and lower beams and a pair of left and right columns. A brace is arranged in the frame body, and an anchor bolt penetrating the frame member forming the frame body is driven into the formation surface of the rectangular space in the beam and the column so that the bolt head of the anchor bolt is separated from the frame member. Injecting a filler into the gap between the frame member and the forming surface, the frame member has at least an elongated plate portion, and a pair of side plate portions projecting vertically from both long side portions of the elongated plate portion. By placing the fixing filler in the recess formed by the plate part and the side plate part, the installation work can be completed only by the anchor bolt driving work, the frame member setting work and the filler filling work. Solving the above-mentioned problem (1), the rectangular space , Dimensions plus the thickness of the filler injected into the gap width of the side plate portions only not built narrow, in the manner to reduce the protruding portion from the beams and columns, to solve the problems of the above (2).
Further, the bolt head of the anchor bolt and the frame member are separated from each other, and the frame member is not integrally fastened to the beam and the column with the anchor bolt, but the anchor bolt is used as the fixing filler and the fixing filler is used as the frame member. By integrating each, the frame member is integrated with the beam and the column by integrating the anchor bolt with the frame member.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of the present invention will be described below with reference to the drawings.
FIG. 1 is a front view showing an earthquake-resistant reinforcement structure according to the present invention, FIGS. 2 and 3 are cross-sectional views along XX and YY of FIG. 1, and FIGS. It is a principal part enlarged view.
A rectangular frame 1 composed of four frame members 1a, 1b, 1c, 1d is arranged in a rectangular space A formed by a pair of adjacent upper and lower beams B1, B2 and a pair of left and right columns C1, C2. , Which penetrate the frame members 1a, 1b, 1c, 1d, are attached to the lower surface of the upper beam B1, the upper surface of the lower beam B2, and the opposing inner surfaces of the pair of columns C1, C2, that is, the rectangular space A. Are formed on the forming surfaces D1, D2,.
Each of the frame members 1a, 1b, 1c, 1d has at least an elongated plate portion 3 facing the rectangular space forming surfaces D1, D2,. Have a pair of side plate portions 4 and 4a vertically projecting from the base plate, and the elongated plate portion 3 is provided with through holes 5, 5a... For the anchor bolts 2, 2a. The bolt heads 6, 6a... Of the penetrated anchor bolts 2, 2a.
Also, a plurality of reinforcing plates 7, 7a... Are arranged at predetermined intervals in the longitudinal direction of the elongated plate portion 3 on the side surface of the elongated plate portion 3 opposite to the forming surfaces D1, D2. 7a are integrated with the side plates 4, 4a.
Filler M having fluidity at the time of casting such as mortar, but having curing and hardening properties is injected into gaps between frame members 1a, 1b, 1c, 1d and forming surfaces D1, D2. A wire mesh 9 is installed in a concave portion 8 formed by the elongated plate portion 3 and the side plate portions 4 and 4a in each of the frame members 1a, 1b, 1c and 1d, and a fixing filler 10 similar to the above-mentioned filler M is struck. Has been established.
[0008]
The two braces 11, 11a are arranged in a V-shape within the frame members 1a, 1b,..., And the upper ends of the braces 11, 11a are positioned at the intersections of the upper frame member 1 and the frame members 1c, 1d on both sides. The lower ends of the brackets 12 and 12a are fixed to brackets 12b provided at the center of the lower frame member 1b.
The shape of the braces 11, 11a is not limited to the V-shape, and may be a mountain type, an X type, a mansard type, etc., though not shown.
[0009]
FIG. 6 is an enlarged sectional view of a main part showing an installation state of another embodiment of the frame member 1a installed on the upper beam B1. The frame member 1a is formed in a square tube steel shape and penetrates an upper portion thereof. The insertion holes 5, 5a... Are formed so that the bolt heads 6, 6a. Also, the respective insertion holes 5, 5a... Of the other frame members 1b, 1c, 1d may be formed so that the bolt heads 6, 6a.
[0010]
Next, the seismic retrofitting method according to the present invention will be described.
(1) After the frame 1 composed of the frame members 1a, 1b, 1c, and 1d is disposed in the rectangular space A, the anchor bolts that penetrate the insertion holes 5, 5a, ... of the frame members 1a, 1b, 1c, and 1d. ... are driven into the forming surfaces D1, D2,... Of the beams B1, B2 and the columns C1, C2, and then the filler M is driven into gaps between the frame members 1a, 1b, 1c, 1d and the forming surfaces D1, D2,. .
(2) After setting the wire mesh 9 in the recess 8 in each of the frame members 1a, 1b, 1c and 1d, the fixing filler 10 is cast.
(3) The upper and lower ends of the braces 11, 11a are fixed to brackets 12, 12a, 12b provided at the intersection of the upper frame member 1 and the frame members 1c, 1d on both sides and the center of the lower frame member 1b. Set up.
[0011]
Next, the operation of the seismic retrofit structure according to the present invention will be described.
When the building shakes due to an earthquake or the like, the shape of the rectangular space A is maintained by the pair of braces 11 and 11a to improve the seismic performance of the building. However, when an earthquake exceeding the allowable seismic intensity occurs, one of the pair of braces 11 and 11a is used. The brace 11, 11a exerts a tensile force or a compressive force on the other side to control the swing of the building.
[0012]
【The invention's effect】
In short, the present invention arranges a rectangular frame 1 in a rectangular space A formed by a pair of adjacent upper and lower beams B1 and B2 and a pair of right and left columns C1 and C2, and includes a brace 11 inside the frame 1. , 11a are arranged, so that the frame 1 and the braces 11, 11a can provide seismic reinforcement, and the braces 11, 11a can be subjected to tensile yielding or compressive yielding by the tensile / compression force acting on the braces 11, 11a. In addition, it is possible to provide a function of consuming energy input to a building as a seismic motion and reducing damage to a structural body as much as possible.
The anchor bolts 2, 2a ... penetrating the frame members 1a, 1b, 1c, 1d constituting the frame body 1 are attached to the surfaces D1, D2 ... of the beams B1, B2 and the columns C1, C2 of the rectangular space A. The bolt heads 6, 6a... Of the anchor bolts 2, 2a are driven so as to be spaced apart from the frame members 1a, 1b, 1c, 1d, and the frame members 1a, 1b, 1c, 1d have at least the elongated plate portion 3 and It has a pair of side plates 4, 4a projecting perpendicularly from the long sides on both sides of the elongated plate 3, and the fixing filler 10 is pressed into a recess 8 formed by the elongated plate 3 and the side plates 4, 4a. Are integrated into the fixing filler 10, and the fixing filler 10 is integrated into the frame members 1a, 1b, 1c, 1d, respectively, so that the anchor bolts 2, 2a. , 1b, 1c, 1d are fastened to the forming surfaces D1, D2,. Without having anchor bolts 2, 2a ... and the frame member 1a, 1b, 1c, can either be integrated with 1d.
.. And the frame members 1a, 1b, 1c, and 1d are in a non-contact state, and can prevent slippage between the anchor bolts 2, 2a... And the frame members 1a, 1b, 1c, and 1d during an earthquake. In addition, it is possible to improve the integrity of the seismic retrofit structure according to the present invention on the skeleton side.
Also, since the filler M is injected into the gaps between the frame members 1a, 1b, 1c, 1d and the forming surfaces D1, D2,..., The positioning of the frame 1 in the rectangular space A can be performed reliably.
[0013]
Since a plurality of reinforcing plates 7, 7a... Are arranged in the longitudinal direction of the elongated plate portion 3 in the concave portions 8 of the frame members 1a, 1b, 1c, 1d, the fixing filler 10 can be divided into a plurality of blocks. Therefore, it is possible to prevent the occurrence of cracks, crushing, and the like due to the action of external force, and it is also possible to improve the strength of the frame members 1a, 1b, 1c, and 1d.
[0014]
When the frame member 1a is installed on the upper beam B1, the recess 8 faces downward and it is difficult to cast the fixing filler 10, but at least the frame member 1a installed on the upper beam B1 is formed in a square tubular shape. Therefore, the installation work can be performed simply and reliably without the dropped fixing filler 10 falling off, and the anchor bolts 2, 2a... Cannot be driven after the frame member 1a is installed. Are formed so as to allow the bolt heads 6, 6a to be inserted therethrough, so that the anchor bolts 2, 2a. Since the frame member 1a can be installed by passing the anchor bolts 2, 2a... Through the holes 5, 5a..., The practical effect is extremely large, such as the frame member 1a can be securely installed on the upper beam B1.
[Brief description of the drawings]
FIG. 1 is a front view showing an earthquake-resistant reinforcement structure according to the present invention.
FIG. 2 is a sectional view taken along line X1-X1 of FIG.
FIG. 3 is a sectional view taken along line Y1-Y1 of FIG.
FIG. 4 is an enlarged view of a main part of FIG. 2;
FIG. 5 is an enlarged view of a main part of FIG. 3;
FIG. 6 is an enlarged sectional view of a main part showing a state where another embodiment of the frame member is installed on the upper beam.
FIG. 7 is a front view showing a conventional earthquake-resistant reinforcement structure.
8 is a sectional view taken along line X2-X2 of FIG.
FIG. 9 is a sectional view taken along line Y2-Y2 of FIG.
FIG. 10 is an enlarged view of a main part of FIG. 8;
FIG. 11 is an enlarged view of a main part of FIG. 9;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Frame body 1a, 1b, 1c, 1d Frame member 2, 2a ... Anchor bolt 3 Slender plate part 4, 4a Side plate part 6, 6a ... Bolt head 7, 7a ... Reinforcement plate 8 Depression 10 Fixing filler 11, 11a Brace A Rectangular space B1, B2 Beam C1, C2 Column D1, D2 ... Forming surface M Filler

Claims (3)

A rectangular frame is disposed in a rectangular space formed by a pair of adjacent upper and lower beams and a pair of left and right columns, and a brace is disposed in the frame, and an anchor bolt penetrating a frame member forming the frame. Is inserted into the formation surface of the rectangular space of the beam and the column so that the bolt head of the anchor bolt is separated from the frame member, and a filler is injected into a gap between the frame member and the formation surface. It has a plate portion and a pair of side plate portions projecting perpendicularly from both long side portions of the elongated plate portion, and a fixing filler is poured into a concave portion formed by the elongated plate portion and the side plate portion. And seismic reinforcement structure. The seismic retrofit structure according to claim 1, wherein a plurality of reinforcing plates are arranged in the concave portion of the frame member in the longitudinal direction of the elongated plate portion. The frame member to be installed at least on the upper beam is formed in a square tube steel shape, and an insertion hole penetrating through the elongated plate portion on the upper portion is formed so that a bolt head can be inserted. The seismic retrofit structure described.

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