JPH10273976A - Earthquake resistant reinforcing device for concrete column - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an earthquake resistant reinforcing device which is improved so that connection edges of the two divided reinforcing cylindrical members can be integrally and firmly connected without using welding for the connection. SOLUTION: A pair of radially divided reinforcing cylindrical halves in which a plurality of male connecting parts 3 are projected at predetermined intervals from connection edges 1-1 of one of the cylindrical halves, having such a shape that is enlarged from its projection root toward connections edges 2-1 of the other of the halves while female connection parts 4 having the same shape as that of the male connection parts 3, and adapted to be laterally fitted for connection onto the latter, are formed in the connection edges 2-1 of the other of the cylindrical halves, are joined together by inner and outer cover patches 5, 6 arranged along and overriding the connected connection edges 1-1, 2-1 of the reinforcing cylindrical halves 1, 2 and fastened to the inner and outer surfaces of the cylindrical halves 1, 2 by bolts 7. The inner and outer patches 5, 6 are made of strip-like members having a width which can hide both male and female connection parts 3, 4 fitted and connected together, from the outside and the inside, in a sandwich-like manner. Thereby, it is possible to integrally and firmly connect the connection edges 1-1, 2-1 of the pair of cylindrical halves 1, 2 together without using welding.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic system used for strengthening viaducts of highways and the like, particularly for strengthening seismic strength of columns (also called piers) supporting bridge girders and concrete columns of buildings. It relates to a reinforcing device.

[0002]

2. Description of the Related Art In recent years, in order to enhance seismic strength against earthquakes and the like, a reinforcing cylinder made of steel or the like is wound around an existing concrete pillar of a viaduct such as a highway to strengthen the seismic strength. Has been done. By the way, the reinforcing cylinder used for such a reinforcing work is manufactured in a radially divided state at a production factory,
At the construction site where the reinforcement work is performed, the connection edges of the pair of divided reinforcing cylinders are welded to each other (the state shown in FIG. 8), or the joint members 20 attached to both connection edges by welding at a production factory or the like. Are engaged with each other, and then the joint members 20 which have been engaged and superimposed are fixed to each other by bolts 21 (the state shown in FIG. 9), whereby the reinforcing cylinder 22 divided into two parts is obtained.
Is wound around the outer periphery of the pillar B so as to wrap the entirety of the pillar B, and concrete (mortar) C is poured between the wound reinforcing cylinder 22 and the pillar B so that the reinforcing cylinder 22 and the pillar B
And the seismic strength of the column B is strengthened.

[0003]

However, in any of the above-mentioned reinforcement works conventionally performed, the connection between the connection edges of the reinforcing cylinder 22 divided into two parts is performed by welding. At the same time, there is a possibility that the welded portion may be peeled off by vibrations repeatedly received. More specifically, it is said that welding is easily affected by the weather and the like, and particularly in bad weather, welding defects are likely to occur frequently. However, actually, due to circumstances such as the construction date, welding at the construction site or welding of the joint member 20 at the production factory is performed without being affected by the weather, and as a result, peeling damage of the welded portion due to poor welding is caused. There was a risk of this happening.

[0004] The present invention has been made in view of such a conventional situation, and an object thereof is to use two connecting edges without using any welding for connecting the connecting edges of the divided reinforcing cylinder body. It is an object of the present invention to provide an improved concrete column seismic reinforcement apparatus which can be integrally and firmly connected to each other.

[0005]

In order to achieve the above object, the present invention is directed to a radially-divided two-part structure, one of which has a connection edge at a required interval and at least a protruding shape directed toward the other connection edge. A plurality of male-side connecting portions having a shape expanded from the protruding root are projected, and a female-side connecting portion having the same shape for fitting and connecting each of the male-side connecting portions from the side at the other connecting edge. And a pair of reinforcing cylinders formed by recessing, and inner and outer abutment plates which are bolted to the inner and outer surfaces along the connecting edges connected to the reinforcing cylinders. The inner and outer patch plates are formed in a strip shape having a width that allows the male and female connection portions fitted and connected to each other to be concealed from the inside and outside in a sandwich shape. Further, it is preferable that a nut is fixed to the inner backing plate in advance by an appropriate fixing means so that it can be bolted from the outside. Also, of the connecting edges of the pair of reinforcing cylinders that are connected to each other, the inner patch plate is fixed to one of the connecting edge sides, and the outer patch plate is fixed to the other connecting edge side by appropriate fixing means in advance, It is preferable that the male and female connecting portions of the pair of reinforcing cylinders be fitted and connected to each other from the side so that the inner and outer patch plates are provided along the inner and outer surfaces of the connection edge. According to such a technical means, the connection edges of the pair of reinforcing cylinders are connected by the male and female connection portions that are fitted and connected to each other from the side in the dividing direction. That is, the connection edges of the pair of reinforcing cylinders are integrally connected in the circumferential direction by the fitting structure of the male and female connection portions. Thereby, the connection between the connection edges of the pair of reinforcing cylinders is strengthened. The connected male and female connecting portions are sandwiched from inside and outside by sandwich plates between the inside and outside. Thereby, the connection between the connection edges of the pair of reinforcing cylinders is performed by a sandwich structure with inner and outer contact plates in addition to the strengthened fitting connection structure of the male and female connection parts, and the inner and outer sides by bolts penetrating the reinforcement cylinder. It is further strengthened by the bolting of the backing plates.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings with respect to the case of the column (pier). FIG.
Shows an example of implementation of the viaduct seismic retrofitting device A of the present invention,
Reference numerals 1 and 2 denote a pair of reinforcing cylinders, 3 denotes a male connecting portion protruding from the connection edge 1-1 of one reinforcement cylinder 1, and 4 denotes a recess at the connection edge 2-1 of the other reinforcement cylinder 2. The female-side connecting portions 5 and 6 are inner and outer patch plates attached to the inner and outer surfaces along the connecting edges 1-1 and 2-1 of the pair of reinforcing cylinders 1 and 2, respectively. After the male and female connecting portions 3 and 4 are fitted together and connected, the inner and outer contact plates 5 and 6 are attached to the inner and outer surfaces of the joined connecting edges 1-1 and 2-1 by bolts 7. Then, the pair of reinforcing cylinders 1 and 2 are wound around an existing concrete pillar B of a viaduct such as a highway, for example, to enhance seismic strength against an earthquake or the like so as to wrap the entire pillar A around the outside, and then wound. Concrete (mortar) C is poured between the reinforcing cylinders 1 and 2 and the column A to integrate the reinforcing cylinders 1 and 2 with the column B, and the seismic strength of the column B is increased. It formed so as to be carried out the reinforcement work to strengthen and composed.

The reinforcing cylinders 1 and 2 are made of steel or the like, and have a cylindrical cross section or a square shape corresponding to the cross-sectional shape of the column B to be reinforced, for example, the round shape illustrated in FIG. 1 or the square shape illustrated in FIG. The cylindrical body is divided into two parts in the cylindrical direction, and the male connecting part 3 is provided integrally on one connecting edge 1-1 and the female connecting part 4 is provided integrally on the other connecting edge 2-1. Become.

The male connection portion 3 is provided at a connection edge 1-1 of one of the two reinforcing cylinders 1 at a required interval in the cylinder direction and at a connection edge 2-1 of the other reinforcing cylinder 2. The protruding shape in the direction protrudes into a substantially trapezoidal shape gradually expanded from the base of the protrusion,
On the other hand, the female connection portion 4 is connected to the connection edge 2-1 of the other reinforcing cylinder 2.
The male joint 3 is recessed with an opening having the same shape as that of the male joint 3 so that the male joint 3 is fitted and connected from the side.

The connecting edge 1-1 of one reinforcing cylinder 1 having the male connecting portion 3 and the connecting edge 2-1 of the other reinforcing cylinder 2 having the female connecting portion 4 are provided. Bolts 7 for inner and outer backing plates 5 and 6
The bolt through holes 8 and 9 for fixing are respectively opened. The bolt through holes 8 and 9 are formed near the protruding base of the male-side connecting portion 3 and near the expanded opening edge of the female-side connecting portion 4, respectively. Bolt 7 so that the connection portion is sandwiched from the circumferential direction in the set state.
Are penetrated, and the inner and outer abutment plates 5 and 6 are fixed by bolts 7 (see enlarged views of FIGS. 1 and 2).

The inner and outer contact plates 5, 6 are connected to both male and female connecting portions 3,
The connecting edges 1-1 and 2-1 of the reinforcing cylinders 1 and 2 connected by the fitting of 4 are sandwiched from inside and outside including the male and female connecting portions 3 and 4 in a sandwich manner, and the connection is performed. En 1-1, 2-
1 serves to reinforce the connection between the two. Further, with respect to the inner backing plate 5, when the concrete C is poured into the space between the reinforcing cylinders 1 and 2 after the two reinforcing cylinders 1 and 2 are wound around the outside of the column B. It serves to seal the joints between the connecting edges 1-1 and 2-1 including the joints of the male and female connecting parts 3 and 4 so as not to leak out, and they are fitted and connected to each other. It is formed in the shape of a strip having a width that can be concealed in a sandwich form from inside and outside including both the male and female connection parts 3 and 4, and the bolt insertion holes 10 and 11 are respectively opened. A nut 12 is fastened to a portion of the inner backing plate 5 where the bolt insertion hole 10 is opened by appropriate fastening means such as welding or bonding, and the inner and outer backing plates 5 and 6 are connected. After extending along the connecting edges 1-1 and 2-1 of the reinforcing cylinders 1 and 2 and attaching them to the inner and outer surfaces thereof, the reinforcing cylinders 1 and 2 are inserted from the bolt insertion hole 11 side of the outer backing plate 6. 2 bolt through holes 8, 9
Through which the inner and outer contact plates 5, 6 can be bolted.

Next, a brief description will be given of an example of the construction of the viaduct seismic retrofitting device A configured as described above. In the state of being shifted in the dividing direction outside the column B for reinforcing the pair of reinforcing cylinders 1 and 2. Let me face each other. And the joining edge of one of the reinforcing cylinders 1
The one reinforcing cylinder 1 is moved from its side so that 1-1 is brought into sliding contact with the joining edge 2-1 of the other reinforcing cylinder 2, and the male connecting portion of the reinforcing cylinder 1 is moved. 3 is fitted and connected to the female connection portion 4 of the other reinforcing cylinder 2. Thereafter, the inner and outer caul plates 5 and 6 are arranged along the inner and outer surfaces thereof, and the bolt 7 is inserted through the bolt insertion hole 11 of the outer caul plate 6 so that the inner and outer caul plates 5 and 6 are bolted to each other. By that
The winding set for the column B to be reinforced is completed. Thereafter, as is well known, concrete (mortar) C is poured between the wound reinforcing cylinders 1 and 2 and the column B to integrate the viaduct seismic retrofitting device A and the column B to reduce the seismic strength of the column B. It is to strengthen.

FIGS. 3 and 4 show another embodiment in which the bolts 7 are fixed to the inner and outer abutment plates 5 and 6 by bolts 7. As shown in FIGS. That is, in this embodiment, the bolt through-hole 8 is opened at the male connection portion 3 of the reinforcing cylindrical body 1 having the male connection portion 3, and the inner and outer contact plates are made to correspond to the bolt through-hole 8. The bolt insertion holes 10 and 11 are opened in 5 and 6, respectively. In this embodiment, the same reference numerals are used for the same components as those in the above-described embodiment except for the configuration in which the bolt through hole 8 and the bolt insertion holes 10 and 11 are opened. The description will be omitted by using this.

FIGS. 5 and 6 show a pair of reinforcing cylinders 1 and 2 in which the cross-sectional shape is changed to a square shape, and the projecting shape of the male connecting portion 3 and the opening shape of the female connecting portion 4 are rounded. In this embodiment, the cross-sectional shapes of the reinforcing cylinders 1 and 2 and the protruding shapes and opening shapes of the male and female connecting portions 3 and 4 are shown. In the configuration other than the changed configuration, the same reference numerals are used for the same components as those in the above-described embodiment, and the description thereof will be omitted.

FIG. 7 shows the connecting edges 1-1 and 1 of the pair of reinforcing cylinders 1 and 2 having a round cross section, which are in sliding contact with each other.
The inner contact plate 5 is provided on one of the connection edges 1-1 of the 2-1.
Is fixed in advance to the other connecting edge 2-1 side by an appropriate fixing means such as welding or bonding, so that the pair of reinforcing cylinders 1 and 2 are wound around the column B at the time of winding. By connecting the male and female connection portions 3 and 4 to each other from the side as described in detail in the above-described embodiment, the inner and outer contact plates 5 and 4 are connected.
This is another embodiment in which a reference numeral 6 is formed along the inner and outer surfaces of the connection edges 1-1 and 2-1. In this embodiment, since the basic configuration is the same as that of the above-described embodiment, the same reference numerals are used for the same components, and the description thereof will be omitted.

[0015]

The viaduct seismic retrofitting device of the present invention is constructed as described above, and has the following operational effects. The connection edges of the pair of reinforcing cylinders are connected by both male and female connection portions that are fitted and connected to each other from the side in the dividing direction.
That is, the connection edges of the pair of reinforcing cylinders are integrally connected in the circumferential direction by the structure in which the male and female connection portions are fitted to each other. Thereby, the connection between the connection edges of the pair of reinforcing cylinders is strengthened, and there is no fear that the connection state between the connection edges is damaged even when subjected to vibration during earthquake or other load stress. or,
Since the connected male and female connection portions are sandwiched from inside and outside by a sandwich plate between the inside and outside, the connection between the connection edges of the pair of reinforcing cylinders is a strengthened fit between the male and female connection portions. The connection structure is further strengthened by the sandwich structure with the inner and outer patch plates and the bolting of the inner and outer patch plates with bolts penetrating the reinforcing cylinder.

Therefore, according to the viaduct-based seismic retrofitting device of the present invention, the connecting edges of the two-piece reinforcing cylinder are integrally connected without using any welding to connect the connecting edges as in the conventional case. It can be wound around an existing viaduct concrete pillar, such as a highway, for strengthening the seismic strength against an earthquake or the like in a state where it is firmly connected.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an example of an embodiment of a viaduct seismic retrofitting device of the present invention, in a state where it is wound and set on a concrete pillar of a viaduct.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

FIG. 3 is a perspective view showing another embodiment of the viaduct seismic retrofitting device of the present invention, in a state where it is wound and set on a viaduct concrete pillar.

FIG. 4 is a cross-sectional view taken along line IV-IV of FIG.

FIG. 5 is a perspective view showing another embodiment of the viaduct seismic retrofitting device of the present invention, in a state where it is wound around a concrete pillar of the viaduct and set.

FIG. 6 is a cross-sectional view taken along the line VI-VI of FIG. 5;

FIG. 7 is a perspective view showing another embodiment of the viaduct seismic retrofitting device of the present invention.

FIG. 8 is a cross-sectional view showing a conventional example, with some parts omitted.

FIG. 9 is a cross-sectional view showing a conventional example, with some parts omitted.

[Explanation of symbols]

1, 2 ... reinforcing cylinder 1-1, 2-1 ... connecting edge 3 ... male side connecting part 4 ... female side connecting part 5 ... inner contact plate 6 ... outer contact plate 7 ... bolt A ... seismic retrofitting device B ... pillar C ... concrete (mortar)

Claims (1)

[Claims] 1. A plurality of male sides that are radially divided into two parts and that have a predetermined spacing at one connecting edge and at least a projecting shape toward the other connecting edge side has a shape expanded from a projecting root. A pair of reinforcing cylinders having a plurality of female-side connecting portions having the same shape for fitting and connecting the respective male-side connecting portions from the side to the other connecting edge while projecting the connecting portion;
An inner and outer patch plate attached to the inner and outer surfaces of the reinforcing tubular body along the connecting edge connected thereto, and the inner and outer patch plates are fitted and connected to each other. A seismic retrofitting device for concrete columns, characterized in that both male and female connecting portions are formed in a strip shape having a width that can be concealed from inside and outside in a sandwich shape.