JP4669705B2 - Unit building - Google Patents

Description

  The present invention relates to a unit building.

In a unit building, as described in Patent Document 1, when a building unit composed of a frame structure in which columns and beams are welded is fixed to a foundation, there is one in which the column base of the building unit is rigidly joined to the foundation. By rigidly connecting the column base of the building unit to the foundation, the rotation of the column base relative to the foundation is suppressed, and the horizontal rigidity of the building can be improved. In order to increase the horizontal rigidity of the building, it is not necessary to reinforce the cross section of the column, and it is not necessary to add a middle column or a horizontal brace, thereby increasing the degree of freedom of the building plan and reducing the cost.
JP2005-2777

  In the unit building of Patent Document 1, only the column base of the building unit is rigidly connected to the foundation, and the rigidly connected portion of the building unit with respect to the foundation is localized only in the column base in the plan view of the building unit, Even if a large number (for example, four) of high-strength bolts are applied in a concentrated manner, there is a limit to the improvement of the joint strength of the building unit to the foundation. Moreover, since many high-strength bolts are concentratedly applied in the column base, the joining workability is also poor.

  The subject of this invention is improving the joining strength and improving the horizontal rigidity of a unit building, simplifying the joining workability | operativity of the building unit with respect to a foundation.

The invention of claim 1 is a unit building in which a floor beam is joined to a column base of a building unit, and the building unit is fixed to the foundation, and the column base and floor beam of the building unit are joined to the foundation. The building unit is generally rigidly joined to the foundation, and the foundation consists of a steel foundation structure fixed to the concrete foundation with anchor bolts, and the column base and floor beams of the building unit are joined to the foundation structure. The base structure is composed of a frame structure of a main body column and two triangular trusses, and the lower end of each slope forming one side of each of the triangular trusses is joined to each of the mutually orthogonal side portions of the main body column. The bottom of the main body column and the bottom of both triangle trusses are fixed to the concrete foundation, the column base of the building unit is joined to the head of the main body column, and the building unit is attached to the top of both triangle trusses. The floor beams of Tsu bets are those that were to be joined.

  According to a second aspect of the present invention, in the first aspect of the present invention, a connecting tool is joined to the column base of the building unit, and the ends of the floor beams are joined to the connecting tool so as to be joined. The beam is joined to the foundation at the overlapping part with the connector.

According to a third aspect of the present invention, in the first or second aspect of the present invention, the guide hole provided in the column base of the building unit , further comprising a mounting hole that allows the guide pin to be engaged and disengaged in the mounting plate of the head of the main body column. Is inserted into the guide pin so that the column base of the building unit can be aligned with the head of the main body column .

According to a fourth aspect of the present invention, in the third aspect of the present invention, a bolt insertion hole through which a bolt to be screwed to a mounting bracket of a column base of the building unit is inserted into the mounting plate of the head of the column main body, and a guide An attachment hole that allows the pin to be engaged and disengaged is provided .

According to a fifth aspect of the present invention, in the third or fourth aspect of the present invention, the guide pin further extends in a tapered pin shape from the hexagonal head, the large-diameter flange portion on the hexagonal head, and the large-diameter flange portion. The guide pin is attached to the base column body column mounting plate at each of two positions with a 180 ° interval in the circumferential direction of the base outer periphery in contact with the upper surface of the large-diameter flange portion of the tapered guide portion. A vertical groove that allows the following inward projection of the mounting hole provided in the slit to pass therethrough is formed, and the outer periphery of the tapered guide portion is partially cut out from the vertical groove along the circumferential direction. The foundation structure is provided with inward projections at two positions at intervals of 180 degrees in the circumferential direction of the mounting hole provided in the mounting plate of the main body column, the mounting hole being a gourd hole, and the large diameter of the gourd hole The diameter is smaller than the large diameter flange The diameter is slightly larger than the base diameter of the tapered guide part, the small diameter part formed by the inward projection of the gourd hole is smaller than the base diameter of the tapered guide part and larger than the groove bottom radius of the longitudinal groove, and the guide pin is tapered. The guide part is rotated using the hexagonal head in a state where the guide part is passed from the lower surface side of the mounting plate to the mounting hole, the vertical groove is passed through the inward projection of the mounting plate, and the large-diameter flange portion is applied to the lower surface of the mounting plate. The engaging groove at the base of the tapered guide portion is engaged with the inward projection of the mounting plate .

(Claim 1)
(a) The building unit joins both the column base and the floor beam to the foundation, and the joint portion of the building unit to the foundation is separated from the column base and the floor beam in the plan view of the building unit. As a result, the building unit is generally rigidly bonded to the foundation, and the bonding strength of the building unit to the foundation can be improved. Therefore, the rotation of the column base with respect to the foundation can be further suppressed, and the horizontal rigidity of the unit building can be improved.

(b) Since the joint part of the building unit to the foundation can be separated from the column base and floor beam to enhance the joint strength of the building unit to the foundation, the number of high-strength bolts (or medium bolts) can be reduced and the joints can be joined. Workability is also simplified.
(c) By joining the column base of the building unit and the floor beam to the steel foundation structure fixed to the concrete foundation with anchor bolts, the building unit for the foundation can be further improved in joint strength.
(d) The foundation structure is composed of a frame structure of a main body column and two triangular trusses, and the structural strength of the foundation structure can be improved. The head of the main body column and the top of the triangular truss are not connected by a connecting material before joining the building unit. It can be adjusted to match. After the building unit is joined to the head of the main body column and the top of the triangular truss, the floor beam becomes a connecting material that connects the head and the top, and this connecting material is a new truss structure together with the main body column and the triangular truss. The joint strength of the building unit to the foundation can be further improved.

1 is a schematic plan view of a unit building, FIG. 2 is a schematic side view showing the building unit, FIG. 3 is a side view showing a basic joint structure of the building unit of Example 1, and FIG. 4 is a column base and a floor beam of the building unit. FIG. 5 is a perspective view showing the foundation structure, FIG. 6 shows the foundation structure, (A) is a plan view, (B) is a bottom view, and FIG. 7 shows a guide pin. (A) is a perspective view, (B) is a longitudinal cross-sectional view, (C) is a cross-sectional view taken along line CC of (B), (D) is a cross-sectional view showing a state of attachment to the main body column, and FIG. FIG. 9 is a perspective view showing the foundation structure, FIG. 10 shows the foundation structure, (A) is a plan view, (B) is a bottom view, and FIG. 9 is a side view showing the foundation joint structure of the building unit of Reference Example 1 . 11 shows a basic structure, (A) is a plan view showing an inner mounting structure, and (B) is a plan view showing an outer mounting structure.

  As shown in FIGS. 1 and 2, the unit building 10 is constructed such that a plurality of factory-produced building units 20 are installed on the foundation 11 so as to be horizontally adjacent to each other on the foundation 11 provided at the construction site. It is built and installed.

  As shown in FIG. 2, the building unit 20 is welded so that a section steel beam 22 is bridged over the column base 21 </ b> A of the four square steel pipe columns 21, and a section steel ceiling beam 23 is attached to the column head of the column 21. It consists of a rectangular parallelepiped frame structure welded so as to span.

  As shown in FIGS. 3 and 4, the building unit 20 welds one end of a U-shaped connecting tool 24 to each of two mutually orthogonal side surfaces of the column base 21 </ b> A of the column 21. The floor beam 22 is welded and held to the connector 24 in an overlapping state in which the end of the floor beam 22 is held in the U-shaped cross section. The column base 21A and the floor beam 22 are rigidly joined by welding.

  In the building unit 20, a mounting bracket 21B is fixed to the lower end opening of the column base 21A of the column 21 by welding, and a high-strength bolt 61, which will be described later, is screwed onto the mounting bracket 21B so that it can be joined. Further, a lid plate 25 is provided at the lower end opening of the column base 21A of the column 21, and a guide hole 25A for a guide pin 50 described later is provided in the lid plate 25 (FIG. 4).

  In the foundation joint structure of the building unit 20 according to the first embodiment, as shown in FIGS. 2 and 3, the column base 21 </ b> A and the floor beam 22 are joined and fixed to the foundation 11. Specifically, the steel foundation structure 13 is fixed to the concrete solid foundation 12 of the foundation 11 using anchor bolts 12 </ b> A, and the column base 21 </ b> A and the floor beam 22 of the building unit 20 are joined to the foundation structure 13. As a result, the building unit 20 is generally rigidly joined to the foundation 11 (foundation structure 13).

  As shown in FIGS. 3, 5, and 6, the foundation structure 13 includes a frame welded structure of a main body column 30 and two triangular trusses 40 and 40.

  The main body column 30 is provided with a mounting plate 32 (head) and a fixing plate 33 (bottom) welded to the top and bottom of the square steel pipe 31. The main body column 30 includes a bolt insertion hole 32 </ b> A and a mounting hole 32 </ b> B for the guide pin 50 in the mounting plate 32, and a bolt insertion hole 33 </ b> A in the fixing plate 33. In the square steel pipe 31, work windows 31A and 31B are cut out at upper and lower outer corners.

  In the truss 40, two C-shaped steel diagonal members 41, 42 forming two sides intersecting at the apex of the triangle and a round bar 43 forming the base of the triangle by welding the lower ends of the diagonal members 41, 42 were welded together. Is. Both trusses 40 are joined by welding the lower end portion of each diagonal member 41 to each of the orthogonal side portions of the square steel pipe 31 of the main body column 30, and the C-shaped groove of each diagonal member 42 is opposite to the main body column 30 ( In the assembled state facing outward), a mounting plate 44 (top portion) is welded to the intersection vertex of each diagonal member 41, 42, and a fixing plate 45 (bottom portion) is welded to the lower end portion of each diagonal member 42. The truss 40 includes a bolt insertion hole 44 </ b> A in the mounting plate 44, and a bolt insertion hole 45 </ b> A in the fixed plate 45.

The foundation structure 13 enables the guide pin 50 to be engaged with and disengaged from the mounting plate 32 of the main body column 30. As shown in FIG. 7, the guide pin 50 includes a hexagonal head 51, a large-diameter flange portion 52 on the hexagonal head 51, and a tapered guide portion 53 extending in a taper pin shape from above the large-diameter flange portion 52. . The guide pins 50 are provided on the mounting plate 32 of the main body column 30 of the foundation structure 13 at two positions at intervals of 180 degrees in the circumferential direction of the base outer periphery contacting the upper surface of the large-diameter flange portion 52 in the tapered guide portion 53. A cross section in which a longitudinal groove 54 that allows passage of an inward projection 32C, which will be described later, of the mounting hole 32B is cut and formed, and the outer periphery of the tapered guide portion 53 is partially cut out from the longitudinal groove 54 in the circumferential direction. An engagement groove 55 having a circular arc shape is provided. On the other hand, the foundation structure 13 is spaced by 2 in the circumferential direction of the mounting hole 32B provided in the mounting plate 32 of the main body column 30.
An inward projection 32C is provided at each position, and the mounting hole 32B is a gourd hole (FIG. 7C). The diameter is slightly larger, and the small diameter portion formed by the inward projection 32C of the gourd hole is smaller than the root diameter of the tapered guide portion 53 and larger than the groove bottom radius of the vertical groove 54. As a result, the guide pin 50 enters the square steel pipe 31 from the work window 31A of the main body column 30, the tapered guide portion 53 is passed through the mounting hole 32B of the mounting plate 32, and the vertical groove 54 is passed through the inward projection 32C of the mounting plate 32. With the large-diameter flange portion 52 in contact with the lower surface of the mounting plate 32, the hexagonal head 51 is rotated to engage the engagement groove 55 at the base of the tapered guide portion 53 with the inward projection 32C of the mounting plate 32. To do.

  The guide pin 50 is positioned in the radial direction with respect to the mounting plate 32 by fitting the base diameter of the tapered guide portion 53 into the large diameter portion of the gourd hole of the mounting hole 32B of the mounting plate 32, and the engaging groove 55 is mounted. By being engaged with the inward projection 32C of the plate 32, it is fixed in the axial direction. In the engagement groove 55 provided at the base of the tapered guide portion 53, the groove upper surface 55A (FIG. 7D) sandwiching the inward projection 32C of the mounting plate 32 with the large diameter flange portion 52 is a longitudinal groove 54. A slope shape is formed in which the distance from the large-diameter flange portion 52 is gradually narrowed in the depth direction that is separated from the inward direction, and the inward projection 32C of the mounting plate 32 can be fastened.

Therefore, the building unit 20 is joined to the foundation 11 as follows.
(1) The foundation structure 13 is fixed to the concrete solid foundation 12 using anchor bolts 12A. The fixing plate 33 of the main body column 30 and the fixing plate 45 of both triangular trusses 40 are fastened to the foundation 12 made of concrete.

(2) The mounting plate 32 of the main body column 30 of the foundation structure 13 and the mounting plate 44 of the bilateral triangular truss 40
The column base 21A and the floor beam 22 (connector 24) of the building unit 20 are mounted on the top. At this time, the guide hole of the cover plate provided in the column base 21A of the building unit 20 is inserted into the guide pin 50 attached to the mounting plate 32 of the main body column 30, and the mounting bracket 21B of the column base 21A of the building unit 20 is inserted into the main body column. The bolt insertion hole 32A of the triangular truss 40 is inserted into the bolt insertion hole provided in the overlapping portion of the floor beam 22 of the building unit 20 and the connector 24. Align with hole 44A.

(3) The high strength bolt 61 inserted into the bolt insertion hole 32A of the mounting plate 32 of the main body column 30 of the foundation structure 13 is screwed to the mounting bracket 21B of the column base 21A of the building unit 20, and the column base 21A is thus constructed as the basic structure. Rigidly joined to the body 13. However, instead of the high-strength bolt 61, a medium bolt (the clearance between the medium bolt and the bolt insertion hole through which it is inserted must be within 1 mm) is used.
1A may be pin-bonded to the basic structure 13. A high strength bolt 62 inserted through a washer plate 25 through a bolt insertion hole provided in the overlapping portion of the floor beam 22 of the building unit 20 and the connector 24 is inserted into a bolt insertion hole 44A of the mounting plate 44 of the triangular truss 40. The floor beam 22 is rigidly joined to the foundation structure 13 through the nut 62A. However, instead of the high-strength bolt 62, an intermediate bolt (the clearance between the intermediate bolt and the bolt insertion hole through which it is inserted needs to be within 1 mm) is used to pin the floor beam 22 to the foundation structure 13 But it ’s okay. Thereafter, the guide pin 50 is removed.

According to the present embodiment, the following effects are exhibited.
(a) Both the column base 21A and the floor beam 22 of the building unit 20 are joined to the foundation 11, and the joint portion of the building unit 20 with respect to the foundation 11 is joined to the column base 21A and the floor beam in the plan view of the building unit 20. As a result, the building unit 20 is generally rigidly joined to the foundation 11, and the joining strength of the building unit 20 to the foundation 11 can be improved. Therefore, the rotation of the column base 21A with respect to the foundation 11 can be further suppressed, and the horizontal rigidity of the unit building can be improved.

(b) Since the joint portion of the building unit 20 to the foundation 11 can be separated from the column base 21A and the floor beam 22 to improve the joint strength of the building unit 20 to the foundation 11, high-strength bolts 61 and 62 (medium bolts are also acceptable) Can be reduced in number and the joining workability can be simplified.

(c) By joining the floor beam 22 of the building unit 20 to the foundation 11 at the overlapping portion with the connector 24, the joining strength of the building unit 20 to the foundation 11 can be further improved.

(d) By joining the column base 21A and the floor beam 22 to the steel foundation structure 13 fixed to the concrete foundation 12 with the anchor bolts 12A, the building unit 20 with respect to the foundation 11 has a bonding strength. It can be further improved.

(e) The foundation structure 13 is composed of the frame structure of the main body column 30 and the two triangular trusses 40, and the structural strength of the foundation structure 13 can be improved. Since the head of the main body column 30 and the top of the triangular truss 40 are not connected by the connecting material before joining the building unit 20, the space between the head and the top is provided on the column base 21 </ b> A and the floor beam 22 of the building unit 20. It can be adjusted to match the dimensional accuracy of the bolt insertion holes 32A, 44A. After the building unit 20 is joined to the head of the main body column 30 and the top of the triangular truss 40, the floor beam 22 becomes a connecting material connecting the head and the top, and this connecting material is connected to the main body column 30 and the triangular truss. A new truss structure can be formed together with 40, and the joint strength of the building unit 20 to the foundation 11 can be further improved.

(f) By using the guide pin 50, the column base 21A of the building unit 20 is easily aligned with the head of the main body column 30, and the workability of inserting the high strength bolts 61 and 62 is improved.

( Reference Example 1 )
Reference Example 1 is different from Example 1 in the structure of the steel foundation structure 13. As shown in FIGS. 8 to 10, the basic structure 13 of Reference Example 1 has a plate-like main body portion 70 that is L-shaped in plan view, and each of the two side surfaces of the main body portion 70 has a trapezoidal shape. Yes.

  The foundation structure 13 reinforces the L-shaped upper end portion of the main body portion 70 with a reinforcing plate 71, mounting plates 72 at the center corner portion of the L-shaped upper end portion, and mounting plates 73, 73 at both L-shaped end portions. Provided, and bolt mounting holes 72A and 73A are provided in the mounting plates 72 and 73, respectively.

  In addition, the base structure 13 reinforces the L-shaped lower end portion of the main body portion 70 with the reinforcing plate 74, the fixing plate 75 at the center corner portion of the L-shaped lower end portion, and the solid plates 76 at both L-shaped end portions. The fixing plates 75 and 76 are provided with bolt insertion holes 75A and 76A.

Therefore, in Reference Example 1 , the foundation structure 13 is fixed to the concrete solid foundation 12 using the anchor bolts 12A. The fixing plate 75 and both solid plates 76 of the main body 70 are fastened to the foundation 12 made of concrete. Then, the high strength bolt 61 inserted through the bolt insertion hole 72A of the mounting plate 72 of the main body 70 is screwed to the mounting bracket 21B of the column base 21A of the building unit 20, and the column base 21A is rigidly joined to the foundation structure 13. . However, instead of the high-strength bolt 61, an intermediate bolt (the clearance between the intermediate bolt and the bolt insertion hole through which it is inserted needs to be within 1 mm) is used to pin the column base 21A to the foundation structure 13 But it ’s okay. The high-strength bolt 62 passed through the bolt insertion hole 73A of the mounting plate 73 is passed through the bolt insertion hole and the washer plate 25 provided in the overlapping portion of the floor beam 22 and connector 24 of the building unit 20 and fastened to the nut 62A. The floor beam 22 is rigidly joined to the foundation structure 13. However, instead of the high-strength bolt 62, an intermediate bolt (the clearance between the intermediate bolt and the bolt insertion hole through which it is inserted needs to be within 1 mm) is used to pin the floor beam 22 to the foundation structure 13 But it ’s okay.

  FIG. 11 shows a modification of the steel foundation structure. The foundation structure 13 in FIG. 11A is obtained by arranging mounting plates 81 and 82 with the column base 21A of the building unit 20 and the floor beam 22 (connector 24) facing the inside of the building unit 20, FIG. ) Of the building structure 20 is a structure in which mounting bases 81 and 82 for the column base 21A and the floor beam 22 (connector 24) of the building unit 20 are arranged facing the outside of the building unit 20.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration of the present invention is not limited to this embodiment, and even if there is a design change or the like without departing from the gist of the present invention. It is included in the present invention.

FIG. 1 is a schematic plan view of a unit building. FIG. 2 is a schematic side view showing a building unit. FIG. 3 is a side view showing the basic joint structure of the building unit of the first embodiment. FIG. 4 is a plan view showing the joint between the column base of the building unit and the floor beam. FIG. 5 is a perspective view showing the foundation structure. FIG. 6 shows a basic structure, (A) is a plan view, and (B) is a bottom view. 7A and 7B show guide pins, FIG. 7A is a perspective view, FIG. 7B is a longitudinal sectional view, FIG. 7C is a sectional view taken along line CC in FIG. 7D, and FIG. FIG. FIG. 8 is a side view showing the basic joint structure of the building unit of Reference Example 1. FIG. FIG. 9 is a perspective view showing the foundation structure. FIG. 10 shows a basic structure, (A) is a plan view, and (B) is a bottom view. FIG. 11 shows a basic structure, (A) is a plan view showing an inner mounting structure, and (B) is a plan view showing an outer mounting structure.

Explanation of symbols

10 unit building 11 foundation 12 concrete solid foundation 12A anchor bolt 13 foundation structure 20 building unit 21A column base 22 floor beam 24 connection tool 30 body column 40 triangular truss 41 diagonal material 50 guide pins 61, 62 high strength bolt

Claims (5)

In a unit building that is constructed by joining floor beams to the column base of the building unit and fixing this building unit to the foundation,
By joining the column base and floor beam of the building unit to the foundation, the building unit is generally rigidly joined to the foundation ,
The foundation is composed of a steel foundation structure fixed to a concrete foundation with anchor bolts, and a column base and a floor beam of a building unit are joined to the foundation structure,
The foundation structure is composed of a frame structure of a main body column and two triangular trusses, and joins the lower end of each slope forming one side of each of the triangular trusses to each of the orthogonal sides of the main body column,
Fix each of the bottom of the main body column and the bottom of both triangle trusses to the concrete foundation,
The unit building is characterized in that the column base of the building unit is joined to the head of the main body column, and the floor beams of the building unit are joined to the tops of both triangular trusses .   A joint is joined to the column base of the building unit, and the end of the floor beam is joined to the joint, and the floor beam of the building unit is joined to the foundation at the joint with the joint. The unit building according to Item 1. The mounting plate on the head of the main body column has a mounting hole that allows the guide pin to be engaged and disengaged, the guide hole provided in the column base of the building unit is inserted into the guide pin, and the column base of the building unit is connected to the main body column. The unit building according to claim 1 , wherein the unit building can be aligned with a head. The mounting plate on the head of the column main body includes a bolt insertion hole through which a bolt to be screwed to a mounting bracket on a column base of the building unit is inserted, and a mounting hole that allows the guide pin to be engaged and disengaged. The listed unit building. The guide pin has a hexagon head, a large diameter flange portion on the hexagon head, and a tapered guide portion extending in a taper pin shape from above the large diameter flange portion,
The guide pins are located at the following positions in the mounting holes provided in the mounting plate of the main body column of the foundation structure at two positions with a 180 degree interval in the circumferential direction of the outer periphery of the base contacting the upper surface of the large-diameter flange portion in the tapered guide portion. A longitudinal groove that allows the direction protrusion to pass is formed as a notch, and an outer periphery of the tapered guide part is provided with an arcuate engagement groove that is partially cut out from the longitudinal groove along the circumferential direction,
The foundation structure is provided with inward projections at two positions with a 180-degree interval in the circumferential direction of the mounting hole provided in the mounting plate of the main body column, the mounting hole being a gourd hole, and the large diameter portion of the gourd hole being large The diameter is smaller than the flange diameter, slightly larger than the base diameter of the tapered guide part, and the small diameter part formed by the inward projection of the gourd hole is smaller than the base diameter of the tapered guide part and larger than the groove bottom radius of the longitudinal groove. ,
The guide pin has a hexagonal head with the tapered guide part passing from the lower surface side of the mounting plate to the mounting hole, the vertical groove passing through the inward projection of the mounting plate, and the large diameter flange portion against the lower surface of the mounting plate. The unit building according to claim 3, wherein the unit building is rotated by using the engagement groove at the base of the tapered guide portion to engage the inward projection of the mounting plate.

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