JP2009263897A - Building unit and unit building using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a building unit capable of considerably easily changing the structural performance of a building after the construction and a unit building using the building unit. <P>SOLUTION: Bearing walls 58 are post-fitted to the gantry frame structure 56 of the building unit. The bearing wall 58 includes additional columns 60. The bottom ends of the additional columns are secured to existing buried anchor bolts 54, respectively. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a building unit provided with a portal frame structure of a ramen structure configured in a gate shape, and a unit building using the same.

In the following Patent Document 1, in a house where the building frame is composed of beams and load-bearing walls, the building frame is made common, and a seismic member that is detachable is attached to the building frame, so as to meet the customer's needs for seismic performance. A technique is disclosed in which the seismic performance can be changed in stages.
JP 2001-90383 A

  However, in the case of the prior art disclosed in Patent Document 1 above, it is possible to change the seismic performance at the time of new construction, but even if the customer desires to enhance the seismic performance after the new construction, the change of the seismic performance by the same method Cannot be adjusted.

  In particular, in the situation where extending the life of houses has become the direction of future policies, the required level for seismic performance may increase due to future changes in the law or changes in consumer awareness. It is not easy to change the seismic performance of buildings that have been built.

  In view of the above facts, an object of the present invention is to obtain a building unit that can relatively easily change the structural performance of the building at a later date after the new construction and a unit building using the same.

  The building unit according to the invention of claim 1 includes a pair of columns, an upper beam connecting the upper ends of the pair of columns, and extending from the lower end of the columns in parallel to the upper beam and spans more than the upper beam. A lower frame having a short length, a portal frame structure of a ramen structure configured in a gate shape, an existing anchor bolt set on the extending end side of the lower beam, and using the existing anchor bolt And an additional structural element that is retrofitted after the building is completed within the frame surface of the gate-type frame body and reinforces the frame surface.

  According to a second aspect of the present invention, in the building unit according to the first aspect, the additional structural element includes an additional column erected in parallel to the column using the existing anchor bolt, and between the column and the additional column. The bearing wall is configured to include a reinforcing member that reinforces the in-plane.

  According to a third aspect of the present invention, in the building unit according to the first aspect, the additional structural element is a vibration damping device fixed in a frame surface using the existing anchor bolt.

  According to a fourth aspect of the present invention, in the building unit according to any one of the first to third aspects, the anchor bolt disposition position of the lower beam is a cross-sectional shape of the anchor bolt disposition portion of the lower beam. A lower beam reinforcing bracket for holding the frame is provided.

  According to a fifth aspect of the present invention, in the building unit according to the fourth aspect, the additional structural element is fixed to the lower beam reinforcing bracket.

  The unit building according to the invention of claim 6 is constructed by using one or more building units described in any one of claims 1 to 5.

  According to the first aspect of the present invention, the building unit is provided with a gate-type frame structure configured in a gate shape as a ramen structure. A lower beam is extended to the lower end of the column of the portal frame, and an existing anchor bolt is set on the extended end side. Therefore, when a unit building is constructed using a building unit having this gate-type frame, planning such as installing an entrance door on the frame surface is possible.

  On the other hand, when it is necessary to change the structural performance such as seismic reinforcement and wind resistance after the building is completed, the existing anchor bolts set on the extended end side of the lower beam of the portal frame are used. An additional structural element is retrofitted in the frame plane of the portal frame. Thereby, the frame surface is reinforced and deformation of the frame surface is suppressed. Accordingly, the frame surface and, in turn, the horizontal rigidity of the building unit is increased accordingly. Therefore, the structural performance such as the seismic strength of the building unit alone and the structural performance of the unit building can be changed relatively easily.

  According to the second aspect of the present invention, the additional structural element includes the additional column erected in parallel with the column using the existing anchor bolt, and the reinforcing member that reinforces the in-plane between the column and the additional column. Therefore, the performance of the load-bearing wall, which has extremely high rigidity and load-bearing capacity compared to the ramen, is added to the portal frame structure of the ramen structure.

  According to the third aspect of the present invention, since the additional structural element is configured as a vibration damping device fixed in the frame surface using the existing anchor bolt, the response value (acceleration, displacement, etc.) at the time of the earthquake The performance as a vibration control device that improves the structural performance by increasing the damping performance such as reducing the vibration and reducing the vibration at the time of earthquake is added to the portal frame structure of the ramen structure.

  According to the fourth aspect of the present invention, when a load such as an earthquake load is applied, the load is input from the additional column to the lower beam reinforcing bracket provided at the anchor bolt installation position in the lower beam, and further, the existing anchor bolt Is transmitted to. In other words, the load acting on the frame surface can be reliably transmitted to the anchor bolt via the lower beam reinforcing bracket disposed in the lower beam.

  According to the fifth aspect of the present invention, since the additional structural element is fixed to the lower beam reinforcing bracket, it is not necessary to change the specifications of the existing anchor bolt. In other words, although the lower beam reinforcement bracket is disposed in the lower beam to reinforce the lower beam, it is not fixed to the additional structural element, and the additional structural element is fixed to the extension portion of the existing anchor bolt. In the case of a structure (when an anchor bolt is extended to penetrate the lower beam and an additional structural element is fastened and fixed to the penetrating end), the length of the existing anchor bolt is made longer than the normal one and from the foundation It is necessary to make the protrusion amount of the bolt long enough to fix the additional structural element, but if you do so, you can not use the anchor bolts that have been used in the past, but use anchor bolts with special specifications It will be. In addition, the accommodation of the extension part of the anchor bolt needs to be changed accordingly (the end part that penetrates the lower beam is not used at the time of new construction, so it is necessary to change the surrounding accommodation so that it cannot be seen from the outside) . In that case, not only does it lead to cost increase, but usually such post-processing is often work in a building site, so that workability is also reduced. However, according to the present invention, since the additional structural element is fixed to the lower beam reinforcing bracket, the specifications of the existing anchor bolt can be the same as the conventional one, without affecting the workability and cost. It is suppressed.

  According to this invention of Claim 6, since a unit building is comprised using one or more building units as described in any one of the said Claims 1-5, future structural performance of Unit buildings with the feature of being relatively easy to change are obtained.

  As described above, the building unit according to the first aspect of the present invention has an excellent effect that the structural performance of the building can be changed relatively easily at a later date after the new construction.

  The building unit according to the present invention described in claim 2 is improved in structural performance such as seismic strength of the building unit by adding the performance of the load bearing wall of extremely high rigidity and proof strength to the portal frame structure of the ramen structure. It has the outstanding effect that it can aim at.

  The building unit according to the present invention described in claim 3 has an excellent effect that the structural performance such as the seismic strength of the building unit can be improved by adding damping performance to the gate-type frame structure of the ramen structure. Have.

  The building unit according to the present invention described in claim 4 has an excellent effect that the reliability with respect to the changed structural performance can be improved.

  The building unit according to the present invention according to claim 5 has an excellent effect that the cost can be suppressed without reducing the productivity of the unit building.

  The unit building according to the present invention described in claim 6 can change structural performance such as seismic performance relatively easily when it is desired to improve seismic performance in the future, and has a longer period than before. It has an excellent effect of ensuring a comfortable and secure living space.

  [First Embodiment]

  A building unit according to the present invention and a first embodiment of a unit building using the same will be described below with reference to FIGS.

  FIG. 5 shows a schematic front view of a unit house according to the present embodiment. As shown in this figure, a unit house 10 as a unit building includes a foundation 12, a first floor portion 14 provided on the foundation 12, a second floor portion 16 provided on the first floor portion 14, and a second floor. And a roof portion 17 provided on the portion 16. Further, the first floor portion 14 is configured by a plurality of first floor units 18 configured in a box shape. Similarly, the second floor portion 16 is configured by a plurality of second floor units 20 configured in a box shape of the same size as the first floor unit 18. The first floor unit 18 and the second floor unit 20 include a docking plate (not shown) disposed between the column head of the first floor unit 18 and the column base of the second floor unit 20 and a large beam disposed opposite to each other on the same floor. They are connected to each other vertically and horizontally by connecting means such as an inter-beam connecting bracket.

  FIG. 4 shows a frame structure of the first-floor unit 18 as a building unit that configures the entrance dirt section 44 described later in the first-floor portion 14. As shown in this figure, the first floor unit 18 is composed of four pillars 22 erected at the four corners, two long and short kinds of floor beams 28 and 30 that connect lower ends of the opposite pillars 22, The unit main body 36 comprised by the long and short two types of ceiling beams 32 and 34 which connect the upper end parts of the pillar 22 to perform is provided. Since the first floor unit 14 shown in FIG. 4 is used as the entrance soil interspace 44 as will be described later, among the pair of long side floor beams 28, the floor beam 28 positioned on the outdoor side is the original one. Although not having a length, the lengths of the opposing floor beams 28 and 30 are the same for the other first floor unit 14 and second floor unit 20.

  The large floor beams 28 and 30 are configured as a part of the floor frame 38 of the floor panel, and small floor beams (not shown) are arranged at predetermined intervals between the large floor floor beams 28. Similarly, the ceiling beams 32 and 34 are configured as a part of the ceiling frame 40 of the ceiling panel, and ceiling small beams (not shown) are arranged at predetermined intervals between the ceiling large beams 32 on the long side. In FIG. 5, the first floor unit 14 is configured by the first floor unit 18 which is a box unit of the same size. However, this is only an example, and the number and size of the units to be used are arbitrary. Not only a box-shaped unit but also a deformed unit such as a substantially box-shaped cut unit that is partially cut according to planning or application may be used.

  At the lower end of each column 22, a leading anchor bolt 42 projects vertically downward. The leading anchor bolt 28 is inserted into an anchor hole formed on a foundation (not shown), and grout material is injected into the foundation 12. It is supposed to be fixed. As shown in FIG. 4, the tip anchor bolt 42 is not necessarily provided directly below the lower end portion of the column 22, and may be protruded from the vicinity of the lower end portion of the column 22. Specifically, an attachment member such as a bracket for fixing a leading anchor bolt may be disposed adjacent to the side surface of the lower end portion of the column 22 so that the leading anchor bolt 42 protrudes vertically downward from the mounting member.

  Here, in the first floor unit 18 shown in FIG. 4, the floor girder 28 on one long side is cut in the middle so as to form the entrance soil portion 44. Hereinafter, this portion is referred to as “beam cut portion 46”, and the pair of floor girder 28 whose span length is shortened by forming the beam cut portion 46 is referred to as “soil side floor girder 48”. An entrance door 50 (shown by a two-dot chain line in FIG. 5) is attached to the beam cut portion 46 so as to be openable and closable.

  As shown in FIG. 3 and FIG. 4, each of the dirt floor floor beams 48 is made of channel steel, and includes a web 48 </ b> A disposed on the outdoor side, and a pair of upper and lower upper flanges 48 </ b> B and 48 </ b> C. Has been. The lower flange 48C of the free end side (the side opposite to the side joined to the column 22) of the dirt floor floor beam 48 is fastened and fixed to embedded anchor bolts 54 as existing anchor bolts embedded in the foundation or dirt concrete 52. ing.

  In the present embodiment, additional structural elements are retrofitted at the time of renovation after new construction using the embedded anchor bolts 54, which will be described in detail below. In addition, since the fixing structure on the free end side of any dirt floor floor beam 48 is the same, the structural elements added to the free edge side of the dirt floor floor beam 48 on the side indicated by the arrow A in FIG. 4 will be described. I will do it.

  FIG. 1 (A) schematically shows a frame on the side surface side provided with the dirt floor floor beam 48 of the first floor unit 18 described above. As shown in the figure, the frame on the side surface is represented as a portal frame 56 having a ramen structure.

  FIG. 1B schematically shows a state in which a load-bearing wall 58 as an additional structural element is added to the portal frame 56 of FIG. 1A. As shown in FIG. 2, the load bearing wall 58 includes an additional column 60 erected on the embedded anchor bolt 54, the additional column 60 and the original column 22, the ceiling beam 32 and the dirt floor floor beam 48, It is comprised by the brace 62 as a reinforcement member extended on the diagonal of the rectangular plane formed of these members.

  FIG. 3 shows a detailed structure around the column base portion of the additional column 60. As shown in this drawing, a bracket 64 in the floor large beam is additionally set at the position where the embedded anchor bolt 54 is disposed in the dirt floor floor beam 48. The bracket 64 in the floor girder is a rectangular flat plate upper plate member 66 disposed in surface contact with the lower surface of the upper flange 48B of the soil floor floor beam 48, and a rectangle disposed in surface contact with the upper surface of the lower flange 48C. The lower plate member 68 is a flat plate, and a pair of side wall portions 70 that vertically connect the lower surface of the upper plate member 66 and the upper surface of the lower plate member 68 that are vertically opposed to each other. A bolt insertion hole 72 through which the tip of the embedded anchor bolt 54 can be inserted is formed at the center of the lower plate member 68. In addition, bolt insertion holes 74 are formed on both sides of the upper plate member 66.

  A rectangular flat base plate 76 that overlaps the upper plate member 66 in plan view is attached to the lower end portion of the additional column 60 by welding or the like. Bolt insertion holes 78 are formed on both sides of the base plate 76 coaxially with the bolt insertion holes 74. Then, the fixing bolt 80 is inserted into the bolt insertion holes 78 and 74 from the upper side of the base plate 76, and the nut 82 is screwed from the lower side of the lower plate member 68, so that the lower end portion of the additional column 60 becomes the upper flange. It is being fixed to the bracket 64 in a floor big beam via 48B.

  Further, the upper end portion of the embedded anchor bolt 54 is inserted into the bolt insertion hole 72 of the lower plate member 68 of the bracket 64 in the floor girder, and the nut 84 extends from the upper side of the lower plate member 68 to the upper end portion of the embedded anchor bolt 54. Are screwed together, and the lower end portion of the additional pillar 60 is fastened and fixed to the embedded anchor bolt 54 via the bracket 64 in the large floor beam. A spacer 86 is interposed between the lower surface of the lower flange 48C and the foundation or dirt concrete 52.

  In addition, the ceiling large beam bracket that is the same as or similar to the floor large beam bracket 64 is also attached to the inside of the ceiling beam 32 facing the upper end portion of the additional column 60, so that the upper end portion of the additional column 60 and the ceiling beam 32 are connected to each other. It is bolted via a bracket in the ceiling beam.

  (Action / Effect)

  Next, the operation and effect of this embodiment will be described.

  The first floor unit 18 and the second floor unit 20 are assembled in advance on a production line in the factory. Then, the first-floor unit 18 and the second-floor unit 20 are individually placed on the carrier of the transport vehicle and transported to the building site.

  In the building site, the first floor unit 18 is sequentially installed on the foundation 12 with a crane, and then the second floor unit 20 is installed on the first floor unit 18, and the first floor unit 18 and the second floor unit 20 are connected vertically and horizontally by connecting means. Connected to each other. Thereafter, the roof portion 17 is installed on the second floor unit 20 to construct the unit house 10.

  On the other hand, when it becomes necessary to change the structural performance such as seismic reinforcement and windproof reinforcement after the unit house 10 is completed, an additional structural element is added to the gate-type frame 56 of the first-floor unit 18 that forms the entrance soil section 44. Is done.

  More specifically, the additional column 60 is erected directly above the bracket 64 in the floor large beam previously mounted in the dirt floor floor beam 48 at the time of new construction, and the base plate 76 disposed at the lower end of the additional column 60 is bolted. 80 and nut 82 are fastened and fixed to the upper plate member 66 of the bracket 64 in the floor girder. The lower plate member 68 is fixed to the embedded anchor bolt 54 at the time of new construction. Similarly, the upper end of the additional pillar 60 and the ceiling beam 32 are fastened and fixed via a bracket in the ceiling beam not shown. Further, the bearing wall 58 is formed by stretching the brace 62.

  As described above, in the present embodiment, the bearing wall 58 is added to the position adjacent to the column 22 of the gate-type frame body 56 having the ramen structure, so that the frame surface of the gate-type frame body 56 is reinforced and the frame surface is deformed. It is suppressed. Accordingly, the horizontal rigidity of the first floor unit 14 is increased accordingly. As a result, the structural performance such as the seismic strength of the first floor unit 14 and the structural performance of the unit house 10 can be changed relatively easily. As a result, according to the present embodiment, the structural performance of the unit house 10 can be changed relatively easily at a later date after the new construction.

  Further, in the present embodiment, the additional structural element includes an additional column 60 erected in parallel to the column 22 using the embedded anchor bolt 54 that is an existing anchor bolt, and a surface between the column 22 and the additional column 60. Since the bearing wall 58 is configured to include a brace 62 that reinforces the inside, the performance of the bearing wall is extremely high in rigidity and strength compared to the ramen. As a result, the structural performance such as the seismic strength of the first floor unit 14 can be improved.

  Further, in the present embodiment, when a load such as an earthquake load is applied, the additional pillar 60 is inputted to the anchor beam installation bracket 64 arranged at the anchor bolt arrangement position in the dirt floor side beam 48, and the embedded anchor bolt 54 is further inserted. Is transmitted to. That is, the load acting on the frame surface can be reliably transmitted to the embedded anchor bolt 54 via the floor large beam inner bracket 64 disposed in the dirt floor floor large beam 48. Therefore, according to this embodiment, the reliability with respect to the changed structural performance can be improved.

  Supplementing the above effect, as in the prior art described above, it is generally not assumed at the time of new construction design that an earthquake-resistant member is added later. Here, the addition of seismic members is an act that we want to carry out on the first floor where the horizontal force due to earthquakes and winds is the largest for two- and three-story houses, and it depends on the type of seismic member added. When the seismic member such as the brace 62 is added as in the present embodiment, it does not function effectively as the seismic member if the fixing degree of the leg portion is small. Therefore, if the additional pillar 60 is fixed to the foundation or the soil concrete 52 using the embedded anchor bolt 54 as in this embodiment, sufficient seismic strength and wind strength can be added. Significance is recognized.

  Furthermore, if it is intended at the time of the new construction design that the seismic member to be added is fastened with the reinforced concrete foundation and the anchor bolt as in the present embodiment, the anchor bolt is embedded at the time of the new construction or the anchor bolt is inserted. However, according to this embodiment, since the embedded anchor bolt 54 which is an existing anchor bolt is used, such a consideration is necessary. It is unnecessary.

  Moreover, in this embodiment, since the lower end part of the additional pillar 60 of the load-bearing wall 58 is fixed to the floor large beam inner bracket 64, it is not necessary to change the specification of the embedded anchor bolt 54. In other words, although the bracket in the floor girder is disposed in the soil side floor girder 48 to reinforce the soil side floor girder 48, it is not fixed to the lower end portion of the additional column 60 of the bearing wall 58. When the lower end portion is fixed to the extension portion of the embedded anchor bolt (the embedded anchor bolt 54 is extended to the upper flange 48B side of the dirt floor floor girder 48 and the upper flange 48B of the dirt floor floor girder 48 is penetrated. When the base plate 76 at the lower end of the additional pillar 60 is fastened and fixed to the penetrating end), the length of the embedded anchor bolt is made longer than the normal one, and the amount of protrusion from the foundation or dirt concrete 52 is added. It is necessary to lengthen the lower end of the bolt in advance so that it can be fixed, but if so, the embedded anchor bolt 54 that has been used in the past cannot be used. It will use the special specifications embedded anchor bolt. In addition, it is necessary to change the accommodation of the extension portion of the embedded anchor bolt (the end portion that penetrates the upper flange 48B of the soil floor floor beam 48 is not used at the time of new construction, so that the surrounding area is not visible from the outside. Need to change the delivery). In that case, not only does it lead to cost increase, but usually such post-processing is often work in a building site, so that workability is also reduced. However, according to the present embodiment, since the lower end portion of the additional pillar 60 is fixed to the bracket 64 in the floor cross beam, the specification of the embedded anchor bolt 54 can be the same as the conventional one, which also affects the workability. The cost is also suppressed. As a result, according to this embodiment, the cost can be suppressed without reducing the productivity of the unit 10.

  Furthermore, in this embodiment, since the unit house 10 is configured to include the first floor unit 14 having the above configuration, it is relatively easy to change the future structural performance. As a result, according to this embodiment, when it is desired to improve the seismic performance in the future, the structural performance such as seismic performance can be changed relatively easily, and it is comfortable and safe for a longer period of time than before. Can be secured.

  In the above-described embodiment, the load bearing walls 58 are provided on both sides of the gate-type frame body 56. However, the present invention is not limited thereto, and the load bearing walls 58 are provided only on one of the pillars 22 as shown in FIG. May be arranged.

  [Second Embodiment]

  Next, a second embodiment of a building unit according to the present invention and a unit building using the same will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 7, the unit house 10 according to the second embodiment is characterized in that a load bearing wall 92 using a steel plate 90 is used as an additional structural element.

  Specifically, the additional pillar 60, the pillar 22, the ceiling beam 32, and the dirt floor floor beam 48 constitute a frame-shaped frame of the load-bearing wall 92, and the inner circumference of the frame of the load-bearing wall 92 is inside thereof. A steel plate 90 made of a single plate that is slightly smaller than the surface is disposed. Vertical ribs 94 and horizontal ribs 96 are fixed to the steel plate 90 by welding or the like, thereby reinforcing the steel plate 90. Further, an angle-shaped mounting bracket 98 is disposed on the outer peripheral edge of the steel plate 90. The base 98A of the mounting bracket 98 is fixed to the outer peripheral portion of the steel plate 90 with bolts or rivets, and the bent portion 98B of the mounting bracket 98 is fixed to the inner peripheral surface of the portal frame 56 with bolts or rivets or the like. Yes.

  (Action / Effect)

  According to the above configuration, the load-bearing wall 92 including the steel plate 90 instead of the brace 62 is retrofitted into the frame surface of the portal frame 56 using the embedded anchor bolt 54 that is an existing anchor bolt. As in the first embodiment, the performance as the load bearing wall 92 is added to the portal frame 56. Therefore, the same effect as the first embodiment described above can be obtained.

  [Third Embodiment]

  Next, a third embodiment of a building unit according to the present invention and a unit building using the same will be described with reference to FIG. Note that the same components as those in the first embodiment described above are denoted by the same reference numerals and description thereof is omitted.

  As shown in FIG. 8, in the unit house 10 according to the third embodiment, the damping device 100 is retrofitted in the frame surface of the portal frame 56 using the embedded anchor bolt 54 that is an existing anchor bolt. There is a feature in the point.

  Specifically, the lower end portion of the additional pillar 60 is fixed to the embedded anchor bolt 54 with the same configuration as in the first embodiment. In addition, although the upper end part of the additional pillar 60 is arrange | positioned adjacent to the lower surface of the ceiling beam 32, it is not connected. Although not shown in the figure, a support member having a U-shaped cross section with an open bottom is attached to the lower surface of the ceiling beam 32, and the upper end of the additional column 60 can be relatively displaced in the support member. The board to be inserted is attached. As a result, the fall of the additional pillar 60 and the vibration control frame 102 in the out-of-plane direction of the frame surface during an earthquake or the like is restricted.

  Further, the side surface in the vicinity of the upper end portion of the additional pillar 60 and the vicinity of the end portion on the pillar 22 side of the dirt floor side beam 48 are obliquely connected by the vibration control frame 102. Further, a bracket 104 is attached to a position near the column 22 on the lower surface of the ceiling beam 32 so as to protrude downward, and a vibration damper 106 is provided between the bracket 104 and the side surface of the upper end of the additional column 60. It is laid over. The damping damper 106 is arranged in parallel to the ceiling beam 32, and the connecting portion with the bracket 104 and the connecting portion with the side surface of the additional pillar 60 are pin-coupled so as to be relatively rotatable.

  (Action / Effect)

  According to the above configuration, when a horizontal load is input to the portal frame 56 during an earthquake or the like and a relative displacement is about to occur between the ceiling beam 32 and the soil side floor beam 48, the damping damper 106 expands and contracts. By doing so, the relative displacement is suppressed. Thereby, the displacement of the portal frame 56 and the first floor unit 14 is suppressed.

  As described above, in this embodiment, the additional structural element is a portal type using the embedded anchor bolt 54 which is an existing anchor bolt, unlike the load bearing wall 58 of the first embodiment and the load bearing wall 92 of the second embodiment. Since it is configured as the vibration control device 100 installed in the frame surface of the frame body 56, it is possible to reduce response values (acceleration, displacement, etc.) at the time of an earthquake or to quickly reduce vibration at the time of an earthquake. In other words, according to the present embodiment, the performance as the vibration damping device 100 that increases the damping performance and improves the structural performance is added to the portal frame 56 having the ramen structure. Thereby, damping performance is added to the portal frame 56 having a ramen structure, and it is possible to improve the structural performance such as seismic strength of the first floor unit 14 and the unit house 10.

  [Supplementary explanation of this embodiment]

  In each embodiment described above, the present invention is applied to a general house (unit house 10). However, the present invention is not limited to this, and other uses (commercial use, industrial use, agricultural use, welfare facility / public, etc.) The present invention may be used for unit buildings (including non-profit administrative uses such as facilities).

  Moreover, in each embodiment mentioned above, although the unit house 10 was set as the planning provided with the 1st floor unit 14 which has the gate-type frame structure 56 illustrated in FIG. 4 in one place, not only this but the said The first floor unit 14 may be provided at a plurality of locations.

FIG. 4A is a schematic diagram schematically illustrating a state before adding an additional structural element to a gate-type frame, and FIG. 5B is an additional structural element added to the gate-type frame. It is a schematic diagram which shows the state. It is a schematic front view which shows the specific structure of the gate type | mold frame structure shown by FIG. 1 (B). It is an enlarged view which shows the detailed structure of the column base part of an additional column. It is a schematic perspective view which shows the frame structure of the first-floor unit used for the entrance soil part. It is the whole front view of the unit house provided with the 1st floor unit shown by FIG. It is a schematic diagram corresponding to FIG. 1 which shows the modification of the portal frame of FIG. It is an enlarged view corresponding to FIG. 2 which shows the gate-type frame of the 1st floor unit which concerns on 2nd Embodiment. It is an enlarged view corresponding to FIG. 2 which shows the portal frame of the 1st floor unit which concerns on 3rd Embodiment.

Explanation of symbols

10 Unit housing (unit building)
18 First floor unit (building unit)
22 columns 32 ceiling beams (upper beams)
48 Dough side floor beam (lower beam)
54 Embedded anchor bolts (existing anchor bolts)
56 Portal frame 58 Bearing wall (additional structural element)
60 Additional pillar 62 Brace (reinforcement member)
64 Floor large beam bracket (lower beam reinforcement bracket)
80 Bolt 82 Nut 84 Nut 90 Steel plate (Reinforcing member)
92 Bearing walls (additional structural elements)
100 Damping device (additional structural element)

Claims (6)

A gate including a pair of columns, an upper beam connecting the upper ends of the pair of columns, and a lower beam extending in parallel to the upper beam from the lower ends of the columns and having a shorter span length than the upper beam A frame-type frame structure with a ramen structure,
An existing anchor bolt set on the extending end side of the lower beam;
An additional structural element that is retrofitted after the building is completed within the frame surface of the portal frame using the existing anchor bolts, and reinforces the frame surface;
Having a building unit.   The additional structural element includes an additional column erected in parallel to the column using the existing anchor bolts, and a strength member configured to reinforce an in-plane between the column and the additional column. The building unit according to claim 1, which is a wall.   The building unit according to claim 1, wherein the additional structural element is a vibration damping device fixed in a frame surface using the existing anchor bolt.   The lower beam reinforcement bracket which hold | maintains the cross-sectional shape of the anchor bolt arrangement | positioning site | part of the said lower beam in the anchor bolt arrangement position in the said lower beam is provided. Building unit.   The building unit according to claim 4, wherein the additional structural element is fixed to the lower beam reinforcing bracket.   The unit building constructed | assembled using one or more building units as described in any one of Claims 1-5.

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