JP5021425B2 - Precast concrete column member joining structure and precast concrete column member joining method - Google Patents

Description

  The present invention relates to a joining structure of precast concrete column members for joining precast concrete column members to each other, and a method for joining precast concrete column members.

  In the construction of reinforced concrete buildings, precast column members and beam members are actively used in order to save construction workers and improve construction efficiency. In particular, in the construction of high-rise buildings, rationalization of construction is important for shortening the construction period and reducing costs, and therefore construction using precast column members and beam members is effective.

  For example, a building-to-column connection structure 300 as shown in FIG. 14 is employed. In the column beam connection structure 300, a PCa horizontal structure 308 in which a column fitting 304 and a large beam 306 are integrated is placed on a precast concrete (hereinafter referred to as PCa) column 302. .

  A column sleeve 312 is embedded in the column base portion of the PCa column 310 placed on the PCa horizontal structure 308. Then, the column connecting rebar 316 provided so as to protrude upward from the PCa column 302 is passed through the vertical through-hole 314 formed in the column connection portion 304. Further, by inserting and fixing the end portion of the column connection reinforcing bar 316 into the column sleeve 312 of the PCa column 310, the PCa column 302 and the PCa column 310 are joined to each other via the column connection portion 304. is doing.

  The opposing large beams 306 are provided with beam connection reinforcing bars 320 so as to protrude from the ends of the large beams 306. Then, the end portions of the protruding beam connecting rebar 320 are connected to each other by a mechanical joint 318, a formwork is provided at a joint portion between the large beams 306, and concrete U is post-placed to join the large beams 306 to each other. ing.

  Further, as shown in FIG. 15, in the column-beam joint structure 322 of the building of Patent Document 1, a PCa horizontal structure 330 in which a column fitting 326 and a large beam 328 are integrated on a PCa column 324. Is placed.

  A column sleeve 338 is embedded in the column head of the PCa column 324. Then, a column connecting reinforcing bar 340 provided so as to protrude downward from a PCa column 336 placed on the PCa horizontal structure 330 is formed into a vertical through hole 342 formed in the column fitting portion 326. To penetrate. Further, by inserting and fixing the end of the column connection reinforcing bar 340 into the column sleeve 338 of the PCa column 324, the PCa column 324 and the PCa column 336 are joined via the column port 326. is doing.

Here, when the joining method of the column beam joint structures 300 and 322 is to be applied to the joining of the PCa pillar members without using the column joints, the PCa upper pillar member (PCa pillars 310 and 336) is replaced with the PCa. When placed on the lower column member (PCa columns 302 and 324), the horizontal movement of the PCa upper column member is restricted by the column reinforcing bars (column connecting reinforcing bars 316 and 340). Therefore, it is difficult to adjust the position by moving the PCa upper column member in the horizontal direction.
Japanese Patent Application Laid-Open No. 2004-346587

  In consideration of such facts, the present invention provides a precast concrete column member joining structure capable of moving the precast concrete upper column member placed on the precast concrete lower column member laterally or horizontally, and the joining of the precast concrete column member. It is an object to provide a method.

The invention according to the first aspect includes a lower column member formed of precast concrete, an upper column member formed of precast concrete and placed on the lower column member, and the lower column member formed on the lower column member A lower hole penetrating from the upper surface to the side surface, an upper hole formed in the upper column member and penetrating from the lower surface to the side surface of the upper column member, and the lower hole from the side surface of the lower column member or the side surface of the upper column member And a joining member that is inserted into the upper hole and joins the lower pillar member and the upper pillar member.

In the first aspect of the invention, the upper column member formed of the precast concrete is placed on the lower column member formed of the precast concrete.
A lower hole penetrating from the upper surface of the lower column member to the side surface is formed in the lower column member, and an upper hole penetrating from the lower surface of the upper column member to the side surface is formed in the upper column member.
Further, the joining member is inserted into the lower hole and the upper hole from the side surface of the lower column member or the side surface of the upper column member, whereby the lower column member and the upper column member are joined.

Therefore, even if the upper pillar member is placed on the lower pillar member, it is placed on the lower pillar member until the joining member is inserted from the side surface of the lower pillar member or the side face of the upper pillar member to the lower hole and the upper hole. The placed upper column member can be moved horizontally or horizontally.
Thereby, after placing the upper pillar member on the lower pillar member, the position of the upper pillar member can be adjusted in order to improve the construction accuracy.

According to the second aspect of the present invention, when the upper column member is placed on the lower column member, the lower hole and the upper hole linearly extend from the side surface of the upper column member to the side surface of the lower column member. A through-hole penetrating is formed.

In the second aspect of the invention, when the upper pillar member is placed on the lower pillar member, the through hole is formed by the lower hole and the upper hole. The through hole linearly penetrates from the side surface of the upper column member to the side surface of the lower column member.

  Therefore, since the joining member can be a linear bar, the lower pillar member and the upper pillar member can be joined with a simple member, and easily from the side surface of the lower pillar member or the side face of the upper pillar member. A joining member can be inserted.

According to the third aspect of the present invention, when the upper pillar member is placed on the lower pillar member, the lower hole and the upper hole are curved from the side face of the upper pillar member to the side face of the lower pillar member. A through-hole penetrating is formed.

In the third aspect of the invention, when the upper pillar member is placed on the lower pillar member, the through hole is formed by the lower hole and the upper hole. And this through-hole penetrates in a curve from the side of the upper pillar member to the side of the lower pillar member.

  Therefore, since the fixing length of the joining member inside the lower pillar member and the upper pillar member can be increased, smooth stress transmission can be performed between the joining member, the lower pillar member, and the upper pillar member.

The invention of the fourth aspect includes a lower column member formed of precast concrete, an upper column member formed of precast concrete and placed on the lower column member, and the lower column member formed on the lower column member A lower through hole penetrating from the upper surface of the upper column member to the side surface, a lower insertion hole formed in the lower column member and reaching the inside from the upper surface of the lower column member, and formed from the lower column member to the side surface of the upper column member An upper through hole that penetrates, an upper insertion hole that is formed in the upper column member and reaches the inside from the lower surface of the upper column member, and from the side surface of the lower column member to the lower through hole and the upper insertion hole, or And a joining member that is inserted into the upper through hole and the lower insertion hole from a side surface of the upper pillar member and joins the lower pillar member and the upper pillar member.

In the fourth aspect of the invention, the upper column member formed of the precast concrete is placed on the lower column member formed of the precast concrete.
A lower through-hole penetrating from the upper surface of the lower column member to the side surface and a lower insertion hole reaching from the upper surface of the lower column member to the inside are formed in the lower column member.
The upper column member is formed with an upper through-hole penetrating from the lower surface of the upper column member to the side surface and an upper insertion hole reaching the inside from the lower surface of the upper column member.
Further, the joining member is inserted from the side surface of the lower column member to the lower through hole and the upper insertion hole, or from the side surface of the upper column member to the upper through hole and the lower insertion hole, and the lower column member and the upper column member are Be joined.

  Therefore, even if the upper column member is placed on the lower column member, it is bonded from the side surface of the lower column member to the lower through hole and the upper insertion hole, or from the side surface of the upper column member to the upper through hole and the lower insertion hole. Until the member is inserted, the upper column member placed on the lower column member can be moved horizontally or horizontally. Thus, after the upper column member is placed on the lower column member, the position of the upper column member can be adjusted in order to improve the construction accuracy.

The invention of the fifth aspect is characterized in that prestress is introduced into the joining member after the lower pillar member and the upper pillar member are joined by the joining member.

In the fifth aspect of the invention, the compressive force acting on the joint surface between the lower pillar member and the upper pillar member by introducing prestress to the joining member after the lower pillar member and the upper pillar member are joined by the joining member. This increases the shear force due to friction.
In addition, it is possible to control the tensile stress generated in the lower column member and the upper column member due to the bending moment generated at the joint between the lower column member and the upper column member.
Thereby, the crack which arises in a lower pillar member and an upper pillar member can be prevented, and a lower pillar member and an upper pillar member can be joined firmly. Therefore, the restoration performance at the time of an earthquake can be improved and damage reduction can be aimed at.

The invention of the sixth aspect is a precast concrete column member joining method for joining a lower column member formed of precast concrete and an upper column member formed of precast concrete and placed on the lower column member. From the side surface of the lower column member or the side surface of the upper column member, a lower hole formed in the lower column member and penetrating from the upper surface of the lower column member to the side surface and formed on the upper column member from the lower surface of the upper column member It has the joining process which inserts a joining member in the upper hole penetrated to a side surface, and joins the said lower pillar member and the said upper pillar member.

In the invention of the sixth aspect, the method for joining the precast concrete column members that joins the lower column member formed of the precast concrete and the upper column member formed of the precast concrete and placed on the lower column member is It has a process.
In the joining step, the joining member is formed in the lower pillar member from the side face of the lower pillar member or the side face of the upper pillar member and penetrates from the upper face of the lower pillar member to the side face, and the upper pillar member is formed in the upper pillar member. Is inserted into the upper hole penetrating from the lower surface to the side surface, thereby joining the lower column member and the upper column member.

Therefore, even if the upper pillar member is placed on the lower pillar member, it is placed on the lower pillar member until the joining member is inserted from the side surface of the lower pillar member or the side face of the upper pillar member to the lower hole and the upper hole. The placed upper column member can be moved horizontally or horizontally.
Thereby, after placing the upper pillar member on the lower pillar member, the position of the upper pillar member can be adjusted in order to improve the construction accuracy.

In the seventh aspect of the invention, when the upper column member is placed on the lower column member, the lower hole and the upper hole linearly extend from the side surface of the upper column member to the side surface of the lower column member. A through-hole penetrating is formed.

In the seventh aspect of the invention, when the upper pillar member is placed on the lower pillar member, the through hole is formed by the lower hole and the upper hole. The through hole linearly penetrates from the side surface of the upper column member to the side surface of the lower column member.

  Therefore, since the joining member can be a linear bar, the lower pillar member and the upper pillar member can be joined with a simple member, and easily from the side surface of the lower pillar member or the side face of the upper pillar member. A joining member can be inserted.

According to the eighth aspect of the invention, when the upper pillar member is placed on the lower pillar member, the lower hole and the upper hole are curved from the side surface of the upper pillar member to the side face of the lower pillar member. A through-hole penetrating is formed.

In the eighth aspect of the invention, when the upper pillar member is placed on the lower pillar member, the through hole is formed by the lower hole and the upper hole. And this through-hole penetrates in a curve from the side of the upper pillar member to the side of the lower pillar member.

  Therefore, since the fixing length of the joining member inside the lower pillar member and the upper pillar member can be increased, smooth stress transmission can be performed between the joining member, the lower pillar member, and the upper pillar member.

The ninth aspect of the invention is a precast concrete column member joining method for joining a lower column member formed of precast concrete and an upper column member formed of precast concrete and placed on the lower column member. A lower through hole formed in the lower column member from the side surface of the lower column member and penetrating from the upper surface to the side surface of the lower column member, and an upper insertion hole formed in the upper column member and reaching the inside from the lower surface of the upper column member Or from the side surface of the upper column member, an upper through hole formed in the upper column member and penetrating from the lower surface of the upper column member to the side surface, and formed in the lower column member from the upper surface of the lower column member to the inside It has the joining process which inserts a joining member in the lower insertion hole which reaches, and joins the said lower pillar member and the said upper pillar member.

In the ninth aspect of the invention, the method for joining the precast concrete column members for joining the lower column member formed of the precast concrete and the upper column member formed of the precast concrete and placed on the lower column member is It has a process.

  In the joining process, the joining member is formed in the lower through hole penetrating from the side surface of the lower column member to the side surface and penetrating from the upper surface of the lower column member to the side surface, and reaches the inside from the lower surface of the upper column member. The upper through hole that is formed in the upper column member and penetrates from the lower surface of the upper column member to the side surface, and the lower column member that extends from the upper surface to the inside from the upper insertion hole or from the side surface of the upper column member It inserts into an insertion hole, and, thereby, a lower pillar member and an upper pillar member are joined.

  Therefore, even if the upper column member is placed on the lower column member, it is bonded from the side surface of the lower column member to the lower through hole and the upper insertion hole, or from the side surface of the upper column member to the upper through hole and the lower insertion hole. Until the member is inserted, the upper column member placed on the lower column member can be moved horizontally or horizontally. Thus, after the upper column member is placed on the lower column member, the position of the upper column member can be adjusted in order to improve the construction accuracy.

The invention of the tenth aspect is characterized in that prestress is introduced into the joining member after the lower pillar member and the upper pillar member are joined by the joining member.

In the tenth aspect of the invention, the compressive force acting on the joint surface between the lower pillar member and the upper pillar member by introducing prestress to the joining member after the lower pillar member and the upper pillar member are joined by the joining member. This increases the shear force due to friction.
In addition, it is possible to control the tensile stress generated in the lower column member and the upper column member due to the bending moment generated at the joint between the lower column member and the upper column member.
Thereby, the crack which arises in a lower pillar member and an upper pillar member can be prevented, and a lower pillar member and an upper pillar member can be joined firmly. Therefore, the restoration performance at the time of an earthquake can be improved and damage reduction can be aimed at.

  Since this invention set it as the said structure, the precast concrete upper pillar member mounted on the precast concrete lower pillar member can be moved to a horizontal direction or a horizontal.

  The joining structure of the precast concrete column member of the present invention and the joining method of the precast concrete column member will be described with reference to the drawings. In the present embodiment, the lower column member and the upper column member are column members formed of precast concrete (hereinafter referred to as PCa), so that the present embodiment is reinforced concrete, steel reinforced concrete, prestressed concrete, etc. The present invention can be applied to various PCa column members.

  First, the joint structure of PCa pillar members according to the first embodiment of the present invention will be described.

  As shown in the perspective view of FIG. 1 and the front view of FIG. 2, in the PCa column member joining structure 10, the prismatic upper portion formed of PCa is placed on the prismatic lower column member 12 formed of PCa. The column member 14 is placed. The horizontal cross-sectional shape of the upper column member 14 is the same as the horizontal cross-sectional shape of the lower column member 12.

  As shown in FIG. 2, the lower column member 12 is provided with a column reinforcing bar 28 and a shear reinforcing bar 30 surrounding the column reinforcing bar 28, and the upper column member 14 has a column reinforcing bar 32 and a shear reinforcing bar surrounding the column reinforcing bar 32. 34 is provided.

  In the lower column member 12, a plurality of lower holes 16 penetrating from the upper surface H to the side surface of the lower column member 12 are linearly formed. Four of these lower holes 16 are formed such that two lower ends are aligned in the vertical direction and two in the horizontal direction with respect to one side surface of the lower column member 12. That is, a total of 16 (= 4 × 4 surfaces) prepared holes 16 are formed in the lower column member 12. A notch 24 is formed at the lower end of the lower hole 16.

  The upper column member 14 is formed with a plurality of linearly upper holes 18 penetrating from the lower surface S to the side surface of the upper column member 14. These upper holes 18 are formed in such a manner that two upper ends are aligned in the vertical direction and two in the horizontal direction with respect to one side surface of the upper column member 14. That is, a total of 16 (= 4 × 4 surfaces) upper holes 18 are formed in the upper column member 14. A notch 26 is formed at the upper end of the upper hole 18.

  Female screws (not shown) are formed in the vicinity of the four corners of the upper surface H of the lower column member 12, and the upper surface placed on the upper surface H is determined by the amount of bolts (not shown) screwed into the female screws. The installation height of the column member 14 is adjusted.

  The diameters of the lower hole 16 and the upper hole 18 are substantially equal. Further, the diameters of the lower hole 16 and the upper hole 18 are such that a round steel 20 as a joining member described later can be inserted, and the diameter is as small as possible.

  Here, the upper column member 14 is placed on the lower column member 12, and the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. When this is done, the through hole 22 is formed by the lower hole 16 and the upper hole 18. The through hole 22 linearly penetrates from the side surface of the upper column member 14 to the side surface of the lower column member 12.

  Next, a method for joining PCa column members according to the first embodiment of the present invention will be described.

  In the PCa column member joining method, first, as shown in FIG. 3, the upper column member 14 is placed on the lower column member 12. In FIG. 3, the distance between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 is large for convenience of explanation, but this distance is about 20 mm.

  Next, the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. At this time, the through hole 22 is formed by the lower hole 16 and the upper hole 18. Then, the bolts provided in the vicinity of the four corners of the upper surface H of the lower column member 12 so that the through hole 22 linearly penetrates from the side surface of the upper column member 14 to the side surface of the lower column member 12. The installation height is adjusted in advance.

  Next, a straight round steel 20 as a joining member is inserted into the lower hole 16 and the upper hole 18 from the side surface of the lower column member 12 or the side surface of the upper column member 14, whereby the lower column member 12 and the upper column The member 14 is joined (joining process).

  Male screws 36 are formed at both ends of the round steel 20, and the round steel 20 is fixed to the lower column member 12 and the upper column member 14 by screwing a nut 38 into the male screw 36 and tightening. In this fixed state, the nut 38 is accommodated in the notch 24 or the notch 26.

  Next, as shown in FIG. 2, in the gap between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14, in the lower hole 16 formed in the lower column member 12, The hardening material W is filled in the formed upper hole 18, the notch 24 formed in the lower pillar member 12, and the notch 26 formed in the upper pillar member 14, and the hardening agent W is cured. Thus, the round steel 20 is fixed to the lower column member 12 and the upper column member 14. As a result, the lower column member 12 and the upper column member 14 are integrated to form one prism (state shown in FIG. 1).

  Next, the operation and effect of the PCa pillar member joining structure and the PCa pillar member joining method according to the first embodiment of the present invention will be described.

  As shown in FIGS. 1 to 3, in a state in which the upper column member 14 is placed on the lower column member 12, a circle from the side surface of the lower column member 12 or the side surface of the upper column member 14 to the lower hole 16 and the upper hole 18 Until the steel 20 is inserted, the upper column member 14 placed on the lower column member 12 can be moved horizontally or horizontally.

Therefore, after the upper column member 14 is placed on the lower column member 12, the position of the upper column member 14 can be adjusted in order to improve the construction accuracy.
Further, since the joining member can be a straight bar (round steel 20), the lower pillar member 12 and the upper pillar member 14 can be joined with a simple member, and the side surface of the lower pillar member 12 or The joining member (round steel 20) can be easily inserted from the side surface of the upper column member 14.
For convenience of explanation, only two round bars 20 are shown in FIG. 3, but the round bars 20 are inserted into all the lower holes 16 and the upper holes 18 (through holes 22).

  Next, the joint structure of PCa pillar members according to the second embodiment of the present invention will be described.

  In the second embodiment, the through hole 22 of the first embodiment is curved. Therefore, in the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.

As shown in the perspective view of FIG. 4 and the front view of FIG. 5, in the PCa column member joining structure 40, the prismatic upper portion formed of Pca is formed on the prismatic lower column member 12 formed of PCa. The column member 14 is placed.
A plurality of lower holes 42 </ b> A and 42 </ b> B penetrating from the upper surface H to the side surface of the lower column member 12 are formed in the lower column member 12 in a curved manner. The curvature of the lower hole 42A is larger than the curvature of the lower hole 42B.

The lower hole 42 </ b> A is formed such that two lower ends are aligned in the horizontal direction with respect to one side surface of the lower column member 12. Further, the lower hole 42B is formed so that two lower ends are aligned in the horizontal direction with respect to one side surface of the lower column member 12 and located above the lower end of the lower hole 42A. In other words, a total of eight (= 2 × 4 surfaces) pilot holes 42 </ b> A and a total of eight (= 2 × 4 surfaces) pilot holes 42 </ b> B are formed in the lower column member 12. Notches 44A and 44B are formed at the lower ends of the lower holes 42A and 42B, respectively.
Further, the upper column member 14 is formed with a plurality of upper holes 46A and 46B that penetrate from the lower surface S to the side surface of the upper column member 14 in a curved manner. The curvature of the upper hole 46A is larger than the curvature of the upper hole 46B.

  The upper hole 46 </ b> A is formed such that two upper ends are aligned in the horizontal direction with respect to one side surface of the upper column member 14. Further, the upper hole 46B is formed so that two upper ends thereof are aligned in the horizontal direction with respect to one side surface of the upper column member 14 and located below the upper end portion of the upper hole 46A. That is, a total of eight (= 2 × 4 surfaces) upper holes 46A and a total of eight (= 2 × 4 surfaces) upper holes 46B are formed in the upper column member 14. Notches 48A and 48B are formed at the upper ends of the upper holes 46A and 46B, respectively.

  Female screws (not shown) are formed in the vicinity of the four corners of the upper surface H of the lower column member 12, and the upper surface placed on the upper surface H is determined by the amount of bolts (not shown) screwed into the female screws. The installation height of the column member 14 is adjusted.

  The diameters of the lower holes 42A and 42B and the upper holes 46A and 46B are substantially equal. Further, the diameters of the lower holes 42A and 42B and the upper holes 46A and 46B are as small as possible so that round steel 50A and 50B can be inserted as joining members described later.

  Here, the upper column member 14 is placed on the lower column member 12, and the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. In this case, the through holes 52A and 52B are formed by the lower hole 42A and the upper hole 46A, and the lower hole 42B and the upper hole 46B, respectively. The through holes 52 </ b> A and 52 </ b> B penetrate from the side surface of the upper column member 14 to the side surface of the lower column member 12 in a curved manner. In addition, the curvature of the through hole 52A is larger than the curvature of the through hole 52B.

  Next, a method for joining PCa column members according to the second embodiment of the present invention will be described.

  In the PCa column member joining method, first, as shown in FIG. 6, the upper column member 14 is placed on the lower column member 12. In FIG. 6, the distance between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 is large for convenience of explanation, but this distance is about 20 mm.

  Next, the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. At this time, through holes 52A and 52B are formed by the lower hole 42A and the upper hole 46A, and the lower hole 42B and the upper hole 46B, respectively. Then, the upper column member is formed by bolts provided in the vicinity of the four corners of the upper surface H of the lower column member 12 so that the through holes 52A and 52B penetrate in a curved manner from the side surface of the upper column member 14 to the side surface of the lower column member 12. The installation height of 14 is adjusted in advance.

  Next, curved round steel 50A, 50B as a joining member is inserted into the lower hole 42A and the upper hole 46A, and the lower hole 42B and the upper hole 46B from the side surface of the lower column member 12 or the side surface of the upper column member 14. Thus, the lower pillar member 12 and the upper pillar member 14 are joined (joining step).

  Male screws 54 are formed at both ends of the round steel bars 50A and 50B. The nuts 56 are screwed into the male screws 54 and tightened to fix the round steel bars 50A and 50B to the lower column member 12 and the upper column member 14. To do. In this fixed state, the nut 56 is accommodated in the notches 44A, 44B, 48A, 48B.

  Next, as shown in FIG. 5, in the gap between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14, in the lower holes 42A and 42B formed in the lower column member 12, the upper column member 14 is filled with the hardening material W in the upper holes 46A and 46B formed in the No. 14, the notches 44A and 44B formed in the lower column member 12, and the notches 48A and 48B formed in the upper column member 14. Then, the curing agent W is cured to fix the round bars 50 </ b> A and 50 </ b> B to the lower column member 12 and the upper column member 14. As a result, the lower pillar member 12 and the upper pillar member 14 are integrated into one prism (state shown in FIG. 4).

  Next, operations and effects of the PCa column member joining structure and the PCa column member joining method according to the second embodiment of the present invention will be described.

  As shown in FIGS. 4 to 6, in a state where the upper column member 14 is placed on the lower column member 12, the lower holes 42 </ b> A and 42 </ b> B and the upper hole 46 </ b> A from the side surface of the lower column member 12 or the side surface of the upper column member 14, Until the round steel bars 50A and 50B are inserted into 46B, the upper column member 14 placed on the lower column member 12 can be moved laterally or horizontally.

Therefore, after the upper column member 14 is placed on the lower column member 12, the position of the upper column member 14 can be adjusted in order to improve the construction accuracy.
Moreover, since it becomes possible to lengthen the fixing length of the joining member in the inside of the lower pillar member 12 and the upper pillar member 14 by using a curved bar (round steel 50A, 50B) as the joining member, Smooth stress transmission can be performed between the member and the lower column member 12 and the upper column member 14.

  For convenience of explanation, FIG. 6 shows one round steel 50A and 50B one by one, but the round steel 50A and 50B are the lower hole 42A, the upper hole 46A (through hole 52A), or the lower hole 42B. The upper holes 46B (through holes 52B) are all inserted.

  Next, the joint structure of PCa pillar members according to the third embodiment of the present invention will be described.

  In the third embodiment, the curvature of the through holes 52A and 52B of the second embodiment is increased, and the number of round steels 50A and 50B as the joining members is increased. Therefore, in the description of the third embodiment, the same components as those in the second embodiment are denoted by the same reference numerals and are appropriately omitted.

As shown in the perspective view of FIG. 7 and the front view of FIG. 8, in the PCa column member joining structure 58, the prismatic upper portion formed of Pca is formed on the prismatic lower column member 12 formed of PCa. The column member 14 is placed.
A plurality of lower holes 60 </ b> A and 60 </ b> B penetrating from the upper surface H to the side surface of the lower column member 12 are formed in the lower column member 12 in a curved manner. The curvature of the lower hole 60A is larger than the curvature of the lower hole 60B. Furthermore, the curvature of the lower holes 60A and 60B is larger than the curvature of the lower hole 42A (see FIG. 5) shown in the second embodiment.

  The lower hole 60 </ b> A is formed such that four lower ends are aligned in the horizontal direction with respect to one side surface of the lower column member 12. The lower hole 60B is formed such that four lower ends are aligned horizontally with respect to one side surface of the lower pillar member 12 and located above the lower end of the lower hole 60A. That is, a total of 16 (= 4 × 4 surfaces) prepared holes 60A and a total of 16 (= 4 × 4 surfaces) prepared holes 60B are formed in the lower column member 12. Notches 62A and 62B are formed at the lower ends of the lower holes 60A and 60B, respectively. One notch 62A is formed with lower end openings of two lower holes 60A, and one notch 62B is formed with lower end openings of two lower holes 60B.

  Further, the upper column member 14 is formed with a plurality of upper holes 64A, 64B that penetrate from the lower surface S to the side surface of the upper column member 14 in a curved manner. The curvature of the upper hole 64A is larger than the curvature of the upper hole 64B. Further, the curvature of the upper holes 64A and 64B is larger than the curvature of the upper hole 46A (see FIG. 5) shown in the second embodiment.

  The upper hole 64A is formed such that four upper ends are aligned in the horizontal direction with respect to one side surface of the upper column member 14. Further, the upper hole 64B is formed so that four upper ends thereof are arranged in the horizontal direction with respect to one side surface of the upper column member 14 and are located below the upper end portion of the upper hole 64A. That is, the upper column member 14 is formed with a total of 16 (= 4 × 4 surfaces) upper holes 64A and a total of 16 (= 4 × 4 surfaces) upper holes 64B. Notch portions 66A and 66B are formed at the upper ends of the upper holes 64A and 64B, respectively. One notch 66A is formed with upper end openings of two upper holes 64A, and one notch 66B is formed with upper end openings of two upper holes 64B.

  Female screws (not shown) are formed in the vicinity of the four corners of the upper surface H of the lower column member 12, and the upper surface placed on the upper surface H is determined by the amount of bolts (not shown) screwed into the female screws. The installation height of the column member 14 is adjusted.

  The diameters of the lower holes 60A and 60B and the upper holes 64A and 64B are substantially equal. Further, the diameters of the lower holes 60A and 60B and the upper holes 64A and 64B are such that round steels 68A and 68B as joining members described later can be inserted, and the diameters are as small as possible. For convenience of explanation, FIG. 7 does not depict the gaps formed between the lower holes 60A and 60B and the upper holes 64A and 64B and the round steels 68A and 68B.

  Here, the upper column member 14 is placed on the lower column member 12, and the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. In this case, the through holes 70A and 70B are formed by the lower hole 60A and the upper hole 64A, and the lower hole 60B and the upper hole 64B, respectively. The through holes 70 </ b> A and 70 </ b> B penetrate from the side surface of the upper column member 14 to the side surface of the lower column member 12 in a curved manner. Further, the curvature of the through hole 70A is larger than the curvature of the through hole 70B.

  Next, a method for joining PCa column members according to the third embodiment of the present invention will be described.

  In the PCa column member joining method, first, as shown in FIG. 9, the upper column member 14 is placed on the lower column member 12. In FIG. 9, for convenience of explanation, the distance between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 is large, but this distance is about 20 mm.

  Next, the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. At this time, through holes 70A and 70B are formed by the lower hole 60A and the upper hole 64A, and the lower hole 60B and the upper hole 64B, respectively. Then, the upper column member is formed by bolts provided in the vicinity of the four corners of the upper surface H of the lower column member 12 so that the through holes 70A and 70B penetrate in a curved manner from the side surface of the upper column member 14 to the side surface of the lower column member 12. The installation height of 14 is adjusted in advance.

  Next, curved round steel 68A, 68B as a joining member is inserted into the lower hole 60A and the upper hole 64A, and the lower hole 60B and the upper hole 64B from the side surface of the lower column member 12 or the side surface of the upper column member 14. Thus, the lower pillar member 12 and the upper pillar member 14 are joined (joining step).

  Male screws 72 are formed at both ends of the round steels 68A and 68B. The nuts 74 are screwed into the male screws 72 and tightened to fix the round steels 68A and 68B to the lower column member 12 and the upper column member 14. To do. In this fixed state, the nut 74 is accommodated in the notches 62A, 62B, 66A, 66B.

  Next, as shown in FIG. 8, in the gap between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14, in the lower holes 60A and 60B formed in the lower column member 12, the upper column member 14 is filled with the hardening material W in the upper holes 64A and 64B formed in the No. 14, the notches 62A and 62B formed in the lower column member 12, and the notches 66A and 66B formed in the upper column member 14. Then, the curing agent W is cured to fix the round steel 68A and 68B to the lower column member 12 and the upper column member 14. Thereby, the lower pillar member 12 and the upper pillar member 14 are integrated into one prism (state shown in FIG. 7).

  Next, operations and effects of the PCa pillar member joining structure and the PCa pillar member joining method according to the third embodiment of the present invention will be described.

  As shown in FIGS. 7 to 9, in a state where the upper column member 14 is placed on the lower column member 12, the lower hole 60 </ b> A, the upper hole 64 </ b> A, and the lower hole 60 </ b> A from the side surface of the lower column member 12 or the side surface of the upper column member 14. Until the round bars 68A and 68B are inserted into the hole 60B and the upper hole 64B, the upper column member 14 placed on the lower column member 12 can be moved laterally or horizontally.

Therefore, after the upper column member 14 is placed on the lower column member 12, the position of the upper column member 14 can be adjusted in order to improve the construction accuracy.
Further, since the joining member is a curved bar (round steel 68A, 68B), the fixing length of the joining member inside the lower column member 12 and the upper column member 14 can be increased. Smooth stress transmission can be performed between the member and the lower column member 12 and the upper column member 14.
In addition, the joining member (round steel 68A, 68B) having a large curvature is easily inserted into the joining member (round steel 68A, 68B) from the side surface of the lower column member 12 or the side surface of the upper column member 14. be able to.

  For convenience of explanation, FIG. 9 shows one round steel 68A, 68B one by one, but the round steel 68A, 68B is the lower hole 60A, the upper hole 64A (through hole 70A), or the lower hole 60B. The upper hole 64B (through hole 70B) is inserted.

  Next, the joint structure of PCa pillar members according to the fourth embodiment of the present invention will be described.

  In the fourth embodiment, the round steel bar 20 inserted into the through hole 22 of the first embodiment is connected to a reinforcing bar embedded in the lower column member 12 or the upper column member 14. Therefore, in the description of the fourth embodiment, the same components as those in the first embodiment are denoted by the same reference numerals and are appropriately omitted.

As shown in the perspective view of FIG. 10, the front view of FIG. 11, and the perspective view of FIG. 12, the PCa column member joining structure 76 is formed of Pca on the prismatic lower column member 12 formed of PCa. The formed prismatic upper column member 14 is placed.
The lower column member 12 is formed with a plurality of linearly lower through holes 78 penetrating from the upper surface H to the side surface of the lower column member 12 (for convenience of explanation, FIG. 12 shows some of the lower through holes 78 partially. Omitted).

The lower through-hole 78 is formed such that two lower ends are aligned in the horizontal direction with respect to one side surface of the lower column member 12. That is, a total of eight (= 2 × 4 surfaces) lower through holes 78 are formed in the lower column member 12. A notch 80 is formed at the lower end of the lower through-hole 78.
Further, the lower column member 12 is formed with a plurality of lower insertion holes 82 linearly extending from the upper surface H of the lower column member 12 to the inside (for convenience of explanation, FIG. Part is omitted).

  A hollow steel pipe 84 communicating with the lower insertion hole 82 is embedded in the lower end portion of the lower insertion hole 82. Further, the upper end portion of the reinforcing bar 86 embedded in the lower column member 12 is fixed to the steel pipe 84. The reinforcing bar 86 is bent in the vicinity of the steel pipe 84, and the reinforcing bar 86 positioned below the bent portion is arranged so as to be substantially parallel to the column reinforcing bar 28. An internal thread is formed inside the steel pipe 84.

  The upper column member 14 is formed with a plurality of linearly extending through holes 88 penetrating from the lower surface S to the side surface of the upper column member 14 (for convenience of explanation, a part of the upper through hole 88 is shown in FIG. Omitted).

The upper through-hole 88 is formed such that two upper ends are aligned in the horizontal direction with respect to one side surface of the upper column member 14. That is, a total of eight (= 2 × 4 surfaces) upper through holes 88 are formed in the upper column member 14. A notch 90 is formed at the upper end of the upper through-hole 88.
Further, the upper column member 14 is formed with a plurality of upper insertion holes 92 linearly extending from the lower surface S of the upper column member 14 to the inside (for convenience of explanation, FIG. Part is omitted).

  A hollow steel pipe 94 communicating with the upper insertion hole 92 is embedded in the upper end portion of the upper insertion hole 92. Further, the lower end portion of the reinforcing bar 96 embedded in the upper column member 14 is fixed to the steel pipe 94. The reinforcing bar 96 is bent in the vicinity of the steel pipe 94, and the reinforcing bar 96 located above the bent part is arranged so as to be substantially parallel to the column reinforcing bar 32. An internal thread is formed inside the steel pipe 94.

  Female screws (not shown) are formed in the vicinity of the four corners of the upper surface H of the lower column member 12, and the upper surface placed on the upper surface H is determined by the amount of bolts (not shown) screwed into the female screws. The installation height of the column member 14 is adjusted.

  The diameters of the lower through-hole 78, the lower insertion hole 82, the upper through-hole 88, and the upper insertion hole 92 are substantially equal. The diameters of the lower through-hole 78, the lower insertion hole 82, the upper through-hole 88, and the upper insertion hole 92 are as small as possible so that a round steel 98 as a joining member described later can be inserted. It is a diameter.

  Here, the upper column member 14 is placed on the lower column member 12, and the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. In this case, the coupling holes 100 and 102 are linearly formed by the lower through-hole 78 and the upper insertion hole 92, and the upper through-hole 88 and the lower insertion hole 82, respectively.

  The lengths of the reinforcing bars 86 and 96 shown in FIG. 11 are such that the lengths of the reinforcing bars 86 and 96 and the column reinforcing bars 28 and 32 overlap each other, and the diameters of the reinforcing bars 86 and 96 and the column reinforcing bars 28 and 32 are small. In order to ensure sufficient bonding strength, it is preferable that the ratio be 40 times or more.

  Next, a method for joining PCa column members according to the fourth embodiment of the present invention will be described.

  In the PCa column member joining method, first, as shown in FIG. 12, the upper column member 14 is placed on the lower column member 12. In FIG. 12, for the sake of explanation, the distance between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 is large, but this distance is about 20 mm.

  Next, the upper column member 14 is positioned so that the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 coincide in plan view. At this time, connection holes 100 and 102 are formed by the lower through-hole 78 and the upper insertion hole 92, and the upper through-hole 88 and the lower insertion hole 82, respectively. The installation height of the upper column member 14 is adjusted in advance by bolts provided near the four corners of the upper surface H of the lower column member 12 so that the connection holes 100 and 102 are formed linearly.

  Next, a straight circle as a joining member extends from the side surface of the lower column member 12 to the lower through hole 78 and the upper insertion hole 92 or from the side surface of the upper column member 14 to the upper through hole 88 and the lower insertion hole 82. Steel 98 is inserted, thereby joining the lower column member 12 and the upper column member 14 (joining step).

  Male screws 104 are formed at both ends of the round steel 98, and the male screws 104 formed at one end of the round steel 98 are attached to the steel pipe 84 embedded in the lower column member 12 or the upper column member 14. By screwing into the embedded steel pipe 94 and fixing the round steel 98 to the lower column member 12 or the upper column member 14, and screwing and tightening the nut 106 to the male screw 104 formed at the other end of the round steel 98, The round steel 98 is fixed to the upper column member 14 or the lower column member 12. In this fixed state, the nut 106 is accommodated in the notch 80 or 90.

  Next, as shown in FIG. 11, in the gap between the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14, in the lower through hole 78 formed in the lower column member 12, the lower column member 12. In the lower insertion hole 82 formed in the upper column member 14, in the upper through hole 88 formed in the upper column member 14, in the upper insertion hole 92 formed in the upper column member 14, and in the notch portion 80 formed in the lower column member 12. The hardened material W is filled in the notches 90 formed in the inner and upper column members 14, and the curing agent W is cured to fix the round steel 98 to the lower column member 12 and the upper column member 14. Thereby, the lower pillar member 12 and the upper pillar member 14 are integrated into one prism (state shown in FIG. 10).

  Next, operations and effects of the PCa pillar member joining structure and the PCa pillar member joining method according to the fourth embodiment of the present invention will be described.

  As shown in FIGS. 10 to 12, even when the upper column member 14 is mounted on the lower column member 12 in a state where the upper column member 14 is mounted on the lower column member 12, the side surface of the lower column member 12 Until the round steel 98 as the joining member is inserted into the lower through-hole 78 and the upper insertion hole 92 or from the side surface of the upper column member 14 into the upper through-hole 88 and the lower insertion hole 82, The placed upper column member 14 can be moved horizontally or horizontally.

Therefore, after the upper column member 14 is placed on the lower column member 12, the position of the upper column member 14 can be adjusted in order to improve the construction accuracy.
Further, since the joining member can be a straight bar (round steel 98), the lower pillar member 12 and the upper pillar member 14 can be joined with a simple member, and the side surface of the lower pillar member 12 or The joining member (round steel 98) can be easily inserted from the side surface of the upper column member 14.

  In FIG. 12, only two round steels 98 are shown for convenience of explanation, but the round steel 98 is composed of the lower through hole 78, the upper insertion hole 92 (connection hole 100), or the upper through hole 88, It is inserted into all of the lower insertion holes 82 (connection holes 102).

  A PCa column member joining structure 108 in FIG. 13 shows a modification of the PCa column member joining structure 76. Thus, the bent hollow steel pipe 110 is provided at the lower end portion of the lower insertion hole 82 so as to communicate with the lower insertion hole 82, and the upper end of the linear reinforcing bar 112 arranged substantially parallel to the column reinforcing bar 28. The part may be fixed to the steel pipe 110. Further, a bent hollow steel pipe 114 is provided at the upper end of the upper insertion hole 92 so as to communicate with the upper insertion hole 92, and the lower end of the linear reinforcing bar 116 arranged substantially parallel to the column reinforcing bar 32 is provided. You may fix to this steel pipe 114.

In the first to fourth embodiments, the joining members are round steel 20, 50A, 50B, 68A, 68B, 98, but the lower pillar member 12 and the upper pillar member 14 can be reliably connected. I just need it. For example, the joining member may be a PC steel material (PC steel bar, PC steel wire), a threaded bar, a deformed bar, a bolt, or the like. If the joining member is a threaded reinforcing bar or a deformed reinforcing bar, the adhesion area when the hardening material W is filled is preferable.
Further, the diameters of the round steels 20, 50A, 50B, 68A, 68B, and 98 may be appropriately determined according to the required bonding strength and the like.

  In the first to fourth embodiments, the examples in which the round steels 20, 50A, 50B, 68A, 68B, 98 as the joining members are fixed by the nuts 38, 56, 74, 106 are shown. The round steel 20, 50A, 50B, 68A, 68B, 98 may be fixed using a fixing tool such as a type fixing tool.

  Further, without using a fixing tool such as the nut 38, 56, 74, 106, etc., the round steel 20, 50A, 50B, only by the hardened material W filled around the round steel 20, 50A, 50B, 68A, 68B, 98, 68A, 68B, and 98 may be fixed to the lower column member 12 and the upper column member 14.

  Further, in the fourth embodiment, an example in which a female screw is formed inside the steel pipes 84 and 94 and a male screw at the end of the round steel 98 is screwed into the female screw is shown. The end of the round steel 98 may be inserted into the steel pipes 84 and 94 and fixed with a hardener.

Further, the lower column member 12 and the upper column member 14 are formed by screwing and tightening the nuts 38, 56, 74, 106 to the round steel 20, 50A, 50B, 68A, 68B, 98 shown in the first to fourth embodiments. After joining, prestress may be introduced into the round steel 20, 50A, 50B, 68A, 68B, 98. For example, when PC steel is used as the joining member, prestress may be introduced into the PC steel by a normal post tension method using a hydraulic jack.
If prestress is introduced into the joining member after the lower pillar member 12 and the upper pillar member 14 are joined by the joining member, the compressive force acting on the joining surface between the lower pillar member 12 and the upper pillar member 14 increases. The shearing force can be reliably transmitted by friction.
In addition, it is possible to control the tensile stress generated in the lower column member 12 and the upper column member 14 due to the bending moment generated at the joint between the lower column member 12 and the upper column member 14.
Thereby, the crack which arises in the lower pillar member 12 and the upper pillar member 14 can be prevented, and the lower pillar member 12 and the upper pillar member 14 can be joined firmly. Therefore, the restoration performance at the time of an earthquake can be improved and damage reduction can be aimed at.
In this case, unbonding may be used, but it is preferable to fill the periphery of the joining member with the curing material W because there is a rust prevention effect and the integrated strength is improved.

  In addition, the lower holes 16, 42A, 42B, 60A, 60B, the upper holes 18, 46A, 46B, 64A, 64B, the lower through holes 78, the lower insertion holes 82, and the upper through holes shown in the first to fourth embodiments. 88, the upper insertion hole 92 only needs to be formed with a hole into which the round steel 20, 50A, 50B, 68A, 68B, 98 can be inserted, or may be formed by embedding a tube material such as a sheath tube. A hole may be formed by arranging a cylindrical member at a position to be formed and removing the cylindrical member after the concrete has hardened. Moreover, you may form a hole by perforation.

  Moreover, although the example which provided the volt | bolt which adjusts the installation height of the upper pillar member 14 in the upper surface H of the lower pillar member 12 was shown in the 1st-4th embodiment, not only this but a lower pillar member What is necessary is just to be able to adjust the installation height of the upper column member 14 to be placed on the top 12. Further, the bolts may be eliminated so that the end surfaces of the lower column member 12 and the upper column member 14 are in close contact with each other. In construction, it is preferable to provide a gap of about 20 mm between the end faces of the members to be joined.

  Further, if a cotter is provided on at least one of the upper surface H of the lower column member 12 and the lower surface S of the upper column member 14 shown in the first to fourth embodiments, the curing material W is provided between the upper surface H and the lower surface S. After the filling, the bonding strength between the lower column member 12 and the upper column member 14 is increased, which is preferable.

  In the first to fourth embodiments, the horizontal column shapes of the lower column member 12 and the upper column member 14 are the same. However, the horizontal column shapes of the lower column member 12 and the upper column member 14 are different. It may be. For example, the upper column member 14 whose horizontal cross-sectional shape is smaller than the horizontal cross-sectional shape of the lower column member 12 may be placed on the lower column member 12.

  Also, the round steel 20, 50A, 50B, 68A, 68B, 98, the lower holes 16, 42A, 42B, 60A, 60B, the upper holes 18, 46A, 46B, 64A, 64B shown in the first to fourth embodiments. The arrangement and number of the lower through-holes 78, the lower insertion holes 82, the upper through-holes 88, and the upper insertion holes 92 may be appropriately determined according to the required bonding strength.

  Moreover, what is necessary is just to use the grout material generally used for the hardening material W shown by the 1st-4th embodiment, and mortar, an epoxy resin, etc. can be used.

  Further, the arrangement and shape of the column reinforcing bars 28 and 32 and the shear reinforcement bars 30 and 34 shown in the first to fourth embodiments are appropriately determined according to the strength required for the lower column member 12 and the upper column member 14. That's fine.

  Moreover, it is preferable to use the joining structure 10, 40, 58, 76, 108 of the PCa pillar member of the first to fourth embodiments for joining at the inflection point of the pillar having a small bending moment.

  Further, the PCa column member joining structures 10, 40, 58, 76, and 108 may be used for a part of a building or for all of them. By constructing a building using the joint structure of these PCa members, a building with improved construction quality can be constructed.

As described above, the PCa column member joining structures 10, 40, 58, 76, and 108 shown in the first to fourth embodiments are made of PCa placed on the PCa lower column member 12. The upper column member 14 can be moved laterally or horizontally.
Further, when two column beam structures in which the PCa column member placed on the lower column member and the PCa beam member are integrated are arranged next to each other and the PCa beam members of the column beam structure are joined together, If the joint structure 10, 40, 58, 76, 108 of the PCa column member is applied to the joint structure of the lower column member and the PCa column member of the column beam structure, the column beam structure is vertically or horizontally or horizontally. Various beam member joining methods for joining the PCa beam members of the column beam structure to each other can be used.

The PCa column member joining structures 10, 40, 58, 76, and 108 are used when the PCa column member of the column beam structure is placed on the lower column member and the PCa column member of the column beam structure is mounted on the lower column member. Since the column beam structure (PCa column member of the column beam structure) can be moved horizontally after being placed on the column beam structure, the column beam structure is moved horizontally or horizontally so that the PCa beam member of the column beam structure is moved. This is particularly effective when joining each other.
In such a method of joining the PCa beam members by laterally or horizontally moving the PCa column members, the end surfaces of the beam members are brought into close contact with each other (see FIG. 15), or between the end surfaces of the beam members. A small gap can be formed between them.
That is, it becomes possible to eliminate the work (see FIG. 14) for post-casting concrete at the joint portion between the PCa beam members, thereby improving workability.

  The first to fourth embodiments of the present invention have been described above. However, the present invention is not limited to these embodiments, and the first to fourth embodiments may be used in combination. Of course, various embodiments can be implemented without departing from the scope of the present invention.

It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 1st Embodiment of this invention. It is a front view which shows the joining structure of the precast concrete pillar member which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 1st Embodiment of this invention. It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 2nd Embodiment of this invention. It is a front view which shows the joining structure of the precast concrete pillar member which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 3rd Embodiment of this invention. It is a front view which shows the joining structure of the precast concrete pillar member which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 3rd Embodiment of this invention. It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 4th Embodiment of this invention. It is a front view which shows the joining structure of the precast concrete pillar member which concerns on the 4th Embodiment of this invention. It is a perspective view which shows the joining structure of the precast concrete pillar member which concerns on the 4th Embodiment of this invention. It is a front view which shows the modification of the joining structure of the precast concrete column member which concerns on the 4th Embodiment of this invention. It is explanatory drawing which shows the column beam junction structure of the conventional building. It is explanatory drawing which shows the column beam junction structure of the conventional building.

Explanation of symbols

10, 40, 58, 76, 108 Precast concrete column member joint structure 12 Lower column member 14 Upper column member 16 Lower hole 18 Upper holes 20, 50A, 50B, 68A, 68B, 98 Round steel (joint member)
22, 52A, 52B, 70A, 70B Through hole 42A, 42B, 60A, 60B Lower hole 46A, 46B, 64A, 64B Upper hole 78 Lower through hole 82 Lower insertion hole 88 Upper through hole 92 Upper insertion hole

Claims (6)

A lower column member formed of precast concrete;
An upper column member formed of precast concrete and placed on the lower column member;
A lower hole formed in the lower pillar member and penetrating from an upper surface to a side surface of the lower pillar member;
An upper hole formed in the upper column member and penetrating from a lower surface to a side surface of the upper column member;
Formed by the lower hole and the upper hole when the upper pillar member is placed on the lower pillar member, and obliquely with respect to the vertical direction from the side surface of the upper pillar member to the side surface of the lower pillar member; A through-hole penetrating linearly;
The lower column member and the upper column member are inserted into the lower hole and the upper hole from the side surface of the lower column member or the side surface of the upper column member, and can resist resistance in two orthogonal horizontal directions. A joining member for joining together,
A joint structure of precast concrete column members characterized by comprising: A lower column member formed of precast concrete;
An upper column member formed of precast concrete and placed on the lower column member;
A lower through hole formed in the lower column member and penetrating from the upper surface to the side surface of the lower column member;
A lower insertion hole formed in the lower column member and reaching the inside from the upper surface of the lower column member;
An upper through hole formed in the upper column member and penetrating from the lower surface to the side surface of the upper column member;
An upper insertion hole formed in the upper column member and reaching the inside from the lower surface of the upper column member;
The lower column member and the upper column are inserted into the lower through hole and the upper insertion hole from the side surface of the lower column member, or inserted into the upper through hole and the lower insertion hole from the side surface of the upper column member. A joining member for joining the members;
A joint structure of precast concrete column members characterized by comprising: The precast concrete column member joining structure according to claim 1 or 2, wherein prestress is introduced into the joining member after the lower pillar member and the upper pillar member are joined by the joining member. . In the joining method of the precast concrete column member that joins the lower column member formed of the precast concrete and the upper column member formed of the precast concrete and placed on the lower column member,
By placing the upper column member on the lower column member, a lower hole formed in the lower column member and penetrating from the upper surface to the side surface of the lower column member and the upper column member formed in the upper column member Forming a through-hole penetrating obliquely and linearly with respect to the vertical direction from the side surface of the upper column member to the side surface of the lower column member by an upper hole penetrating from the lower surface to the side surface of the upper column member;
By inserting a joining member into the lower hole and the upper hole from the side surface of the lower column member or the side surface of the upper column member, the lower column member and the A joining step for joining the upper pillar member;
A method for joining precast concrete column members, comprising: In the joining method of the precast concrete column member that joins the lower column member formed of the precast concrete and the upper column member formed of the precast concrete and placed on the lower column member,
A lower through hole formed in the lower column member from the side surface of the lower column member and penetrating from the upper surface to the side surface of the lower column member, and an upper insertion hole formed in the upper column member and reaching the inside from the lower surface of the upper column member Or from the side surface of the upper column member, an upper through hole formed in the upper column member and penetrating from the lower surface of the upper column member to the side surface, and formed in the lower column member from the upper surface of the lower column member to the inside A joining method of a precast concrete column member, comprising a joining step of joining the lower column member and the upper column member by inserting a joining member into the lower insertion hole that reaches. The precast concrete column member joining method according to claim 4 or 5, wherein prestress is introduced into the joining member after the lower pillar member and the upper pillar member are joined by the joining member. .

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