JPH07292860A - Irregular-shaped steel pipe for joint, pc member with irregular-shaped steel pipe for joint, and method for connecting pc member with irregular-shaped steel pipe for joint - Google Patents

Abstract

PURPOSE:To connect a PC(precast concrete) member and another concrete member with high strength, and to simplify connection operation. CONSTITUTION:An irregular-shaped steel pipe 1, to which a proper irregular pattern is formed for transmitting stress among the inner circumferential surface and outer circumferential surface of a steel pipe and reinforcing members adjoined and disposed to these inner and outer circumferential surfaces through concrete and mortar extending over approximately the whole of the inner circumferential surface and the outer circumferential surface is used as a lap joint member. The irregular-shaped steel pipe 1 for the joint is buried at the specified section of a PC member 3, at least one end section of the irregular-shaped steel pipe 1 is faced approximately to the surface section of the PC member 3, and an opening 6 connected to the hollow inside of the steel pipe 1 is formed to the surface section. The reinforcements of a concrete member mounted while being bonded with the PC member 3 with the irregular-shaped steel pipe joint are inserted into the irregular-shaped steel pipe 1 opened to the PC member 3 as a residual space in the irregular-shaped steel pipe 1 is filled with mortar 9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a prefabricated construction method or a semi-prefabricated construction method for a reinforced concrete building. The present invention relates to a method for connecting a PC (precast concrete) member having a joint as a joint and a PC member having the deformed steel pipe.

[0002]

2. Description of the Related Art As is well known, when a building is constructed by using a PC member, the PC member is built on site and integrally connected with other concrete members. The most common connection structure and construction method for this purpose are as follows.

First, a reinforcing bar corresponding to a connecting bar is preliminarily provided on the connecting end surface of the PC member, and the P
Reinforcing bars corresponding to connecting bars are also provided in a projecting manner at connection sites of other concrete members (cast-in-place concrete members or other PC members) installed on site before the C member. Then, the PC member is built in at a predetermined position, the connection end face and the connection portion of another concrete member are opposed to each other at a predetermined interval, the reinforcing bars protruding from both are overlapped with each other, and the lap joint portion is A formwork is installed so as to surround it, and concrete is placed in the formwork to form a lap joint.

A method in which the lap joint in the above connection structure / construction method is replaced with a gas pressure welding joint, a welded joint, or a mechanical joint is often adopted. Further, a splice sleeve method using a grout material-filled joint which is a kind of mechanical joint is also known (for example, Japanese Patent Publication No. 4-52815).

[0005]

As described above, in the construction method in which a formwork is installed at the connecting portion between the PC member and another concrete member and concrete is placed, the work of installing and removing the formwork is troublesome. There is a basic problem. Further, when connecting the reinforcing bars of the connecting portion with a gas pressure welding joint or a welding joint, there are disadvantages that the positioning and connecting work of the reinforcing bars are extremely troublesome and that even a small amount of rain cannot work. In this respect, the above-mentioned splice sleeve method simplifies the work at the site, which is useful for rationalizing the prefabricated method or semi-prefabricated method for reinforced concrete buildings.

[0006] By the way, in the splice sleeve method, a plurality of cylindrical cast iron sleeves and a plurality of deformed rebars having one end inserted into each of them are embedded in one concrete member to be connected to each other, and the other one is embedded. A plurality of deformed reinforcing bars to be inserted into the sleeve are embedded in the concrete member, the deformed reinforcing bars of the other concrete member are butted against the sleeve of one concrete member, and both deformed reinforcing bars are butted in the sleeve. The sleeve is filled with grout material for connection. Since this splice sleeve method is used to join deformed rebars to each other by butt-joining, the sleeve has a diameter larger than the outer diameter of the deformed rebars so that the cores of a pair of deformed rebars to be inserted can be aligned. It is formed with a slightly larger diameter so that there is almost no gap between it and the deformed reinforcing bar inserted. And this construction method requires that a plurality of deformed reinforcing bars of the other concrete member be simultaneously inserted into a plurality of such sleeves at the same time. For this reason, when connecting the deformed bars and the sleeves, the positioning of the deformed bars and the sleeves is complicated and requires a lot of work time, resulting in poor workability. It has been required that a high manufacturing accuracy be required for the formation of. Further, in order to make the joint strength in the sleeve sufficient, it is necessary to set the joint length portion to be considerably long, which increases the sleeve length and the insertion length of the deformed reinforcing bar, which also increases the material cost. It was supposed to be.

On the other hand, in connection with this splice sleeve construction method, when a cylindrical steel pipe having smooth inner and outer peripheral surfaces is used and a pair of reinforcing bars is inserted thereinto to form a joint, the smooth inner -There was a problem that the inserted reinforcing bars tended to slip out due to the outer peripheral surface. In addition, when using a thin-walled spiral sheath tube, the constraint effect of the sheath tube on the grout material filled inside cannot be expected, so in order to compensate for this, the length of the sheath tube etc. should be set long. It is necessary to make the joint portion long, which increases the material cost.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to connect a PC member and another concrete member with high strength and to simplify the connecting work. is there.

[0009]

According to a first aspect of the present invention, there is provided a reinforcing member which is formed in the shape of a hollow cylinder and which is disposed adjacent to the inner peripheral surface and the outer peripheral surface of the peripheral surface. An unevenness for transmitting stress is formed between the concrete and mortar, and at least one opening of the PC member is exposed and provided in the PC member.

According to a second aspect of the present invention, the deformed steel pipe for a joint according to the first aspect of the present invention is provided at an end portion in the longitudinal direction of a PC member for a column, and one of the column main bars is arranged adjacent to the outside of the deformed steel pipe. Reinforcing bars of a concrete member connected to the PC member are inserted into the deformed steel pipe, and the deformed steel pipe is filled with mortar.

A third invention is a method for connecting a PC member having a deformed steel pipe for a joint according to the second invention, wherein the deformed steel pipe is provided at an end portion in the longitudinal direction thereof and any one of the column main bars is provided. A bar PC member is arranged adjacent to the outside of the deformed steel pipe to form a PC member for a column, and then a reinforcing bar of a concrete member connected to the PC member is inserted into the deformed steel pipe and further filled with mortar. And

According to a fourth aspect of the present invention, the deformed steel pipe for a joint according to the first aspect of the present invention is provided at the longitudinal end of the column PC member, and one of the column main bars is joined to the other end of the deformed steel pipe. One of the other main pillars of the column is arranged adjacent to the outside of the deformed steel pipe and protruding from the longitudinal end of the PC member, and is connected to the PC member inside the deformed steel pipe. It is characterized in that the main pillar of another PC member is inserted and the mortar is filled.

According to a fifth aspect of the present invention, when the PC member having the deformed steel pipe for joint of the fourth invention is added up and down, the column in which the other PC member is projected into the deformed steel pipe of one of the PC members. It is characterized in that the main bars are inserted into each other and filled with mortar.

[0014]

[Function] When a deformed steel pipe having the irregularities formed on the inner and outer peripheral surfaces is embedded in concrete, the irregularity of the deformed steel pipe dramatically improves the bonding force, adhesion, and fixing force with the concrete. . When the reinforcing bars are inserted into the deformed steel pipe and the mortar is filled, the actual strength of the mortar filled in the deformed steel pipe increases due to the restraining effect of the rigidity of the deformed steel pipe itself. In addition, the deformed steel pipe has a connection force between the mortar and the steel pipe due to the unevenness on the inner peripheral surface.
The adhesive force and the fixing force are extremely large, and therefore the stress transmission performance between the reinforcing bars inserted therein is extremely large, and a lap joint having high strength can be constructed.
In the same way, the stress transmission performance between the reinforcing bars arranged along the outside of this deformed steel pipe in concrete is equivalent to or better than that of the lap joint used in the normal cast-in-place concrete method. Therefore, a lap joint having high strength can be constructed. If one end of this deformed bar and the end of the rebar are joined in concrete, stress can be directly transmitted between them. Due to the above-mentioned overall action, in the PC member containing the deformed steel pipe, the reinforcing bars of both of them are strongly coupled to each other through the deformed steel pipe by the principle of the lap joint, between the other concrete member connected to the PC member,
The joint strength between the two concrete members becomes extremely large.

PC using such a deformed steel pipe for joints
As the member, the deformed steel pipe is provided at the longitudinal end of the PC member for a column, and one of the column main bars is arranged adjacent to the outside of the deformed steel pipe, and is connected to the PC member inside the deformed steel pipe. With the reinforcement of the concrete member being inserted, one having a configuration that is filled with mortar, and further, by joining one of the column main rebars to the other end of the deformed steel pipe, by either of the other column main rebars, The bar is arranged so as to be adjacent to the outer side of the deformed steel pipe and project from the longitudinal end of the PC member, and the column main bar of another PC member connected to the PC member is inserted into the deformed steel pipe. It may have a structure filled with mortar, and these PC members can be connected with a lap joint by using the deformed steel pipe.

Further, as a method of connecting the PC member having the deformed steel pipe for the joint, the deformed steel pipe is provided at the longitudinal end thereof, and one of the column main bars is arranged adjacent to the outside of the deformed steel pipe. After forming the pillar PC member,
Insert the reinforcing bar of the concrete member to be connected with the C member into the deformed steel pipe and further fill the mortar,
A deformed steel pipe is provided at the longitudinal end of the deformed steel pipe and one of the column main bars is joined to the other end, and one of the other column main bars is adjacent to the outside of the deformed steel pipe and protrudes from the longitudinal end thereof. When the PC members for the pillars are formed by arranging them, and when the PC members are vertically joined, one PC
The projecting column main bars of the other PC member can be inserted into the deformed steel pipe of the member so as to be filled with mortar, and the lap joint by the deformed steel pipe can be obtained by these connection methods.

[0017]

EXAMPLE Basically, the deformed steel pipe 1 for a joint of this example is
Through a concrete or mortar 9 between the inner peripheral surface and the outer peripheral surface of the hollow cylindrical body, and almost all of the inner peripheral surface and the outer peripheral surface thereof, between the column main bars 4 and 42 as reinforcing members arranged adjacently. The convex ribs 2 which are concave and convex for transmitting the stress are formed, and at least one end opening 6 thereof is exposed in the PC member 3.

Further, the PC member having the deformed steel pipe for a joint of this embodiment is basically such that the deformed steel pipe 1 is provided at the longitudinal end of the PC member 3 for a column and any of the column main bars 4 is deformed. The deformed steel pipe 1 is arranged so as to be adjacent to the outside of the steel pipe 1.
A column main bar 42 which is a reinforcing bar of another PC member 31 as a concrete member connected to the PC member 3 is inserted therein, and the mortar 9 is filled therein.

Further, in the method for connecting the PC member having the deformed steel pipe for the joint of this embodiment, the deformed steel pipe 1 is provided at the end portion in the longitudinal direction thereof, and one of the column main bars 4 is adjacent to the outside of the deformed steel pipe 1. To form the columnar PC member 3, and then the column main bar 42 of another PC member 31 connected to the PC member 3 is inserted into the deformed steel pipe 1 and further filled with the mortar 9. There is.

FIG. 1 shows the structure of a deformed steel pipe 1 for a joint according to an embodiment of the present invention. This steel pipe 1 is made by casting or forging, and its size is set according to the application conditions, but generally, the inner diameter is about 5 to 15 cm, the length is about 50 to 300 cm, The wall thickness is about 0.2 to 1 cm. In order to cause the steel pipe 1 to function as a lap joint, convex ribs 2 having an appropriate pattern are formed on almost the entire inner peripheral surface and outer peripheral surface of the steel pipe 1. The convex rib 2 of this embodiment has the same pattern as the convex rib of the deformed steel bar used as a general reinforcing bar, and has a large number of lateral ribs arranged in the circumferential direction and vertical ribs extending in the axial direction. Consists of. It is desirable that the height of the convex ribs 2 is set to about 1/5 to 2 times the wall thickness of the steel pipe 1, and the pitch of the lateral ribs is set to 1/2 or less of the inner diameter of the steel pipe 1. The deformed steel pipe 1 for a joint of the present invention is one in which an uneven pattern is formed on the inner peripheral surface and the outer peripheral surface by such convex ribs 2.

FIG. 2 shows an embodiment of the PC member 3 in which the deformed steel pipe 1 is embedded as a joint. The PC member 3 is a member for an elongated column. In the pillar PC member 3,
A large number of column main bars 4 along the longitudinal direction are embedded, and the deformed steel pipe 1 is embedded at the end. The deformed steel pipe 1 is embedded along the longitudinal direction of the column, one end of the deformed steel pipe 1 almost reaches the end surface of the column PC member 3, and an opening 6 connected to the hollow inside of the steel pipe 1 is formed. It is formed on the end face of the pillar.

On the outer side of the deformed steel pipe 1, column main bars 4 are arranged in parallel so as to follow the deformed steel pipe 1. Mortar injection holes 8a and 8b are formed from the side surface of the PC member 3 so as to communicate with the deformed steel pipe 1 in the column. Both ends of the column PC member 3 may be configured as shown in FIG. 2, or only one end may be configured as shown in FIG. 2 and the column main bar 4 may be protruded from the other end by an appropriate length. Good.

FIG. 2 further shows a state in which the pillar PC member 3 is added to the upper end surface of another pillar PC member 31 on site. A column main bar 42 projects from the upper end surface of the column PC member 31 by an appropriate length (hereinafter, this is referred to as a projecting rebar 42). On the other hand, an opening 6 connected to the deformed steel pipe 1 is provided on the lower end surface of the columnar PC member 3 which is added to the upper portion. The projecting rebar 42 and the opening 6 are in a positional relationship where they coincide with each other. When the pillar PC member 3 is built on site, the projecting rebar 4 below
2 is inserted into the deformed steel pipe 1 through the opening 6. In that state, the mortar 9 is accurately positioned, and the non-shrinkable mortar 9 is filled into the remaining space of the deformed steel pipe 1 using the mortar injection holes 8a and 8b.

When the mortar 9 filled in the deformed steel pipe 1 hardens, the columnar PC members 31 and 3 are connected with sufficient strength. That is, since the unevenness is formed on the inner peripheral surface and the outer peripheral surface of the deformed steel pipe 1 as described above, the projecting rebar 42 on the PC member 31 side and the deformed steel pipe 1 are firmly coupled via the mortar 9 by the principle of the lap joint. Further, in the PC member 3, the deformed steel pipe 1 is firmly connected to the other adjacent column main bars 4 around the same by the principle of the lap joint. Therefore, stress can be sufficiently transmitted between the reinforcing bars of both PC members 3 and 31 (see FIG. 7). This point will be described in more detail. Since the inner peripheral surface area of the deformed steel pipe 1 surrounding the projecting rebar 42 is larger than the outer surface area of the projecting rebar 42, the deformed steel pipe 1 must resist the pulling force acting on the projecting rebar 42. The stress (adhesive shear stress) generated on the 1 side is
Since the inner peripheral surface area is large, it becomes smaller and relaxed. Therefore, it is possible to eliminate the need to perform other local reinforcement on this joint portion and its peripheral portion, and simplify the reinforcement. Can be secured. Figure 2
By arranging the opening 6 of the deformed steel pipe 1 on the end surface of the column PC member 3 in the arrangement relationship shown in (B), it is possible to add and connect the projecting reinforcing bars 42 of other PC members 31 to connect them vertically. .

In the structure in which the opening 6 of the deformed steel pipe 1 is provided only on one end side of the column PC member 3 as in this embodiment, the column main bar 4 may be projected on the other end side. . In the case of such a configuration, one protruding reinforcing bar 4 is inserted into the other deformed steel pipe 1 at a portion where two pillar PC members are vertically joined. Therefore, P for the pillar
Since the reinforcing bar protrudes only to one end side of the C member 3, it is easy to carry out the work of transporting the PC member 3 from the factory to the site and the construction work on the site.

Another embodiment is shown in FIG. This PC
The member 3 is a member for an elongated column, and only one end portion thereof is shown in FIG. The column PC member 3 is embedded with a large number of column main reinforcements 4 along the longitudinal direction thereof and hoop reinforcements 5 surrounding the column main reinforcements 4, and the deformed steel pipe 1 is embedded at the end. The deformed steel pipe 1 is embedded along the longitudinal direction of the column, one end of the deformed steel pipe 1 almost reaches the end surface of the column PC member 3, and an opening 6 connected to the hollow inside of the steel pipe 1 is formed. It is formed on the end face of the pillar.

A lid 7 is welded to the other end inside the column of the deformed steel pipe 1, and the end of the column main bar 4 is welded to this lid 7.
Further, other column main bars 4 are arranged in parallel so as to follow the deformed steel pipe 1. Mortar injection holes 8a and 8b are formed from the side surface of the PC member 3 so as to communicate with the deformed steel pipe 1 in the column.

Both ends of the column PC member 3 may be configured as shown in FIG. 3, or only one end may be configured as shown in FIG. 3 and the column main bar 4 may be appropriately protruded from the other end. It may be configured.

FIG. 4 shows a state in which the pillar PC member 3 of FIG. 3 is connected to the upper end surface of another pillar PC member 31 at the site so as to be added.

In FIG. 4, a column main bar 42 is appropriately protruded from the upper end surface of the column PC member 31. On the other hand, an opening 6 connected to the deformed steel pipe 1 is provided on the lower end surface of the columnar PC member 3 which is added to the upper portion. The projecting rebar 42 and the opening 6 are in a positional relationship where they coincide with each other. When the pillar PC member 3 is built on site, the projecting reinforcing bar 42 at the bottom is opened from the opening 6 to the deformed steel pipe 1.
Insert inside. In that state, the mortar 9 is accurately positioned, and the non-shrinkable mortar 9 is filled into the remaining space of the deformed steel pipe 1 using the mortar injection holes 8a and 8b.

When the mortar 9 filled in the deformed steel pipe 1 hardens, the columnar PC members 31 and 3 are connected with sufficient strength. That is, since the unevenness is formed on the inner peripheral surface and the outer peripheral surface of the deformed steel pipe 1 as described above, the projecting rebar 42 on the PC member 31 side and the deformed steel pipe 1 are firmly coupled via the mortar 9 by the principle of the lap joint. Further, in the PC member 3, the deformed steel pipe 1 is directly joined to a specific column main bar 4 by welding, and is also firmly joined to other peripheral column main bars 4 by the principle of a lap joint. Therefore, stress can be sufficiently transmitted between the reinforcing bars of both PC members 3 and 31 (see FIG. 7).

FIG. 5 shows another embodiment of the columnar PC member 3 with a deformed steel pipe joint according to the present invention. Basically, the PC member having the deformed steel pipe for fitting in this embodiment is
The deformed steel pipe 1 is provided at the longitudinal end of the column PC member 3, one of the column main bars 4 is joined to the other end of the deformed steel pipe 1, and any of the other column main bars 42 is deformed. The column main bar 42 of another PC member 3 connected to the PC member 3 is inserted into the deformed steel pipe 1 so as to be arranged adjacent to the outside of the PC member 3 and project from the longitudinal end of the PC member 3. Along with this, the mortar 9 is filled.

Further, in the method for connecting the PC members having the deformed steel pipes for joints according to the present embodiment, when the PC members 3 having the above structure are vertically joined, the deformed steel pipes 1 of one of the PC members 3 are connected to each other. The three protruding column main bars 42 are inserted into each other to fill the mortar 9.

3 is different from the embodiment of FIG. 3 in that the tip of the column main bar 42 arranged along the side of the deformed steel pipe 1 is made to project from the end face of the column PC member 3 by an appropriate length, and is projected. This is the point where a reinforcing bar is provided. In the pillar PC member 3 of this embodiment, the protruding reinforcing bars (main pillar bars) from other concrete members are used.
Inserting 42 into the deformed steel pipe 1 and at the same time inserting the projecting rebar 42 of the deformed steel pipe 1 into the deformed steel pipe 1 embedded in another concrete member, and connecting them more strongly by a lap joint having mutually opposite relations. You can An example of this connection relationship is shown in FIG. In the arrangement relationship shown in FIG. 6 (B), the opening 6 of the deformed steel pipe 1 and the protruding reinforcing bar 4 are formed on both end surfaces of the columnar PC member 3.
If four pairs of 2 are provided, the column PC members 3 having the same configuration can be connected by vertically connecting them by the mutual insertion coupling shown in FIG. 6 (A).

The number of the deformed steel pipes 1 to be installed is not limited to the example of the above embodiment, and it goes without saying that it can be arbitrarily set.

[0036]

When the deformed steel pipe for joints according to the present invention is embedded in concrete, the deformed steel pipe has a remarkably higher bonding strength, adhesion force, and anchoring force with the concrete due to the unevenness of the surface, as compared with the case where there is no unevenness. Grows to. Inserting a reinforcing bar inside this deformed steel pipe and filling mortar,
The actual strength of the mortar filled inside the deformed steel pipe increases due to the restraining effect of the rigidity of the deformed steel pipe itself. In addition, the deformed steel pipe has an extremely large bonding force, adhesive force, and anchoring force between the mortar and the steel pipe due to the unevenness of the inner peripheral surface, and therefore the stress transfer performance between the reinforcing bar inserted inside becomes extremely large. A lap joint having high strength can be constructed. In the same way, the stress transmission performance between the reinforcing bars arranged along the outside of this deformed steel pipe in concrete is equivalent to or better than that of the lap joint used in the normal cast-in-place concrete method. Therefore, a lap joint having high strength can be constructed. If one end of this deformed steel pipe and the end of the reinforcing bar are joined in concrete, stress can be directly transmitted between the two. As a result of the above combined actions, in the PC member containing this deformed steel pipe, the reinforcing bars of both of them are strongly coupled to each other through the deformed steel pipe by the principle of the lap joint between the PC member and the other concrete member connected thereto. The joint strength of two concrete members becomes extremely large.

As is clear from the above, unlike the sleeve for butt joining used in the splice sleeve method, the deformed steel pipe for a joint of the present invention has a diameter larger than that of a reinforcing member such as a reinforcing bar inserted therein. Since the lap joint is configured with a large value, it is extremely easy to insert the reinforcing member, and it is possible to have a margin in the alignment accuracy with the reinforcing member, and the connection workability is extremely high. It is good. In addition, since it has unevenness and is formed with a large diameter, unlike the case where a smooth steel pipe is used, it is possible to sufficiently prevent the inserted reinforcing member from coming off. Furthermore, since it has irregularities and is formed with high rigidity, it can exert a sufficient restraining effect on the filled mortar and can secure high joint strength, so that the length of the joint portion can be short and necessary. The amount of material can be reduced and the cost can be reduced.

PC using such deformed steel pipe for joint
As the member, the deformed steel pipe is provided at the longitudinal end of the PC member for a column, and one of the column main bars is arranged adjacent to the outside of the deformed steel pipe, and is connected to the PC member inside the deformed steel pipe. With the reinforcement of the concrete member being inserted, one having a configuration that is filled with mortar, and further, by joining one of the column main rebars to the other end of the deformed steel pipe, by either of the other column main rebars, The bar is arranged so as to be adjacent to the outer side of the deformed steel pipe and project from the longitudinal end of the PC member, and the column main bar of another PC member connected to the PC member is inserted into the deformed steel pipe. It may have a structure filled with mortar, and these PC members can be connected with a lap joint by using the deformed steel pipe.

As a method of connecting the PC member having the deformed steel pipe for the joint, the deformed steel pipe is provided at the longitudinal end thereof, and one of the column main bars is arranged adjacent to the outside of the deformed steel pipe. After forming the pillar PC member,
Insert the reinforcing bar of the concrete member to be connected with the C member into the deformed steel pipe and further fill the mortar,
A deformed steel pipe is provided at the longitudinal end of the deformed steel pipe and one of the column main bars is joined to the other end, and one of the other column main bars is adjacent to the outside of the deformed steel pipe and protrudes from the longitudinal end thereof. When the PC members for the pillars are formed by arranging them, and when the PC members are vertically joined, one PC
The projecting column main bars of the other PC member can be inserted into the deformed steel pipe of the member so as to be filled with mortar, and the lap joint by the deformed steel pipe can be obtained by these connection methods.

Since the opening at one end of the PC member having the deformed steel pipe according to the present invention has a large diameter, the work of inserting the rebar of another concrete member and the work of filling the deformed steel pipe with mortar are relatively simple. Therefore, it is useful for simplifying and labor saving the connection work of PC members.

In the structure in which the opening of the deformed steel pipe and the projecting rebar (projecting end of the column main bar) are provided in pairs on the column PC members, the projecting rebars of the two columns are joined together at the portion where the two column PC members are vertically joined. Since the structure is such that they are inserted into each other's deformed steel pipes, the total length of the lap joint becomes longer, and the joint strength between the two becomes larger.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a deformed steel pipe for a joint according to the present invention.

FIG. 2 is a configuration diagram of a connection state of an embodiment of a PC member for a column with a deformed steel pipe joint according to the present invention.

FIG. 3 is a main part configuration diagram of another embodiment of a PC member for a column with a deformed steel pipe joint according to the present invention.

FIG. 4 is a configuration diagram of a connected state of the pillar PC member of FIG. 3 and another concrete member.

FIG. 5 is a main part configuration diagram of another embodiment of a PC member for a column with a deformed steel pipe joint according to the present invention.

6 is a schematic view showing an embodiment of a structure for connecting the column PC members of the type shown in FIG.

FIG. 7 is an explanatory diagram schematically showing a state of stress transmission in a lap joint using the deformed steel pipe according to the present invention.

[Explanation of symbols]

 1 Deformed Steel Pipe 2 Convex Rib 3 Column PC Member 4 Column Main Bar 42 Projecting Rebar 5 Hoop Bar 6 Opening 7 Lid 8a, 8b Mortar Injection Hole 9 Mortar

Claims (5)

[Claims] 1. A stress transmission through a concrete or mortar between a peripheral member and a reinforcing member which is formed adjacent to the inner peripheral surface and the outer peripheral surface of the hollow cylindrical member and is disposed adjacent to the peripheral member. Is formed to allow the
A deformed steel pipe for a joint, characterized in that at least one opening of the C member is exposed in the C member. 2. The column PC member is provided at an end portion in a longitudinal direction of the PC member.
The deformed steel pipe for joint is provided, and one of the column main bars is arranged adjacent to the outside of the deformed steel pipe, and the reinforcing bar of the concrete member connected to the PC member is inserted into the deformed steel pipe. A PC member having a deformed steel pipe for a joint, which is filled with mortar. 3. A PC having the deformed steel pipe for joint according to claim 2.
A method for connecting members, wherein the deformed steel pipe is provided at an end portion in the longitudinal direction thereof, and one of the column main bars is arranged adjacent to the outer side of the deformed steel pipe to form a PC member for a pillar,
A connecting method for a PC member having a deformed steel pipe for a joint, characterized in that a reinforcing bar of a concrete member to be connected to the PC member is then inserted into the deformed steel pipe and further filled with mortar. 4. The pillar PC member according to claim 1, wherein the longitudinal end portion of the PC member.
Is provided with a deformed steel pipe for joint, one of the column main bars is joined to the other end of the deformed steel pipe, and one of the other column main bars is adjacent to the outer side of the deformed steel pipe and A joint characterized in that the column main bar of another PC member connected to the PC member is inserted into the deformed steel pipe so as to project from the end in the longitudinal direction and is filled with mortar. PC member with a deformed steel pipe for steel. 5. A PC having the deformed steel pipe for joint according to claim 4.
A PC having a deformed steel pipe for a joint, characterized in that, when the members are added up and down, the pillar main bars of the other PC member are inserted into the deformed steel pipe of one of the PC members and filled with mortar. How to connect members.