JP5662677B2 - Multistory building - Google Patents

Description

  The present invention relates to a multilayer building such as a super high-rise building having a core body such as a core wall in the center of the building.

  Conventionally, as a structure of a super high-rise building, a high-rise building with a center core structure that has a tower-like core wall that has a square shape in a plan view or a U shape in a plan view at the center of the building is known. (See Patent Documents 1 and 2).

  The core wall of this high-rise building is usually formed of a highly rigid material such as reinforced concrete. In addition, an outer peripheral structure in which columns and beams are formed of reinforced concrete, steel frames, or the like is provided on the outer periphery of the high-rise building, and a steel frame beam or a reinforced concrete beam is bridged between the core wall and the outer peripheral structure.

  And in patent document 1, the edge part by the side of the core wall of the steel beam spanned between a core wall and an outer periphery structure turns into pin joining or slip joining, and it is an edge part of a steel beam with respect to an outer periphery structure. High-rise buildings with rigid joints are disclosed.

  Patent Document 2 discloses a high-rise building in which both ends of a composite beam composed of a steel frame and reinforced concrete bridged between a core wall and an outer peripheral structure are rigidly joined.

Japanese Patent No. 2949391 JP-A-6-306951

  However, the load on each component changes depending on the joint structure that connects the beam material spanned between the core wall and the outer peripheral structure, and this greatly affects the design of the entire building. become. For this reason, it must be determined in accordance with the design concept of the entire building whether the end of the beam member is a pin joint, a rigid joint, or a sliding joint.

  On the other hand, in a high-rise building with a center core structure, a core wall with extremely high rigidity is constructed, but it is not necessarily designed to make full use of the high rigidity, and the strength of the outer peripheral structure is more than necessary. It may be getting bigger.

  Then, this invention aims at providing the multilayer building which can reduce the burden of an outer periphery structure body by utilizing a core body effectively.

  In order to achieve the above object, a multi-layer building of the present invention is a multi-layer building having a core body extending in a vertical direction inside, and between the outer peripheral structure body standing on the outer periphery and the core body. Both ends of the beam member spanned between the core body and the outer peripheral structure are connected to the core body and the outer peripheral structure by pin joints or joints corresponding to pins, respectively.

  Here, the core body may be formed of reinforced concrete, and the beam member may be formed of a steel material. The core body preferably has a wall structure. Further, the outer peripheral structure may be formed by a column and a beam.

  Moreover, it can be set as the structure which protrudes toward each from the position which the said core body and the said outer periphery structure oppose, and connects the edge part of the said beam material to the said fixture.

  In the multi-layer building of the present invention configured as described above, both ends of the beam material spanned between the outer peripheral structure and the core body are respectively connected to the outer peripheral structure and the core body by pin joints or joints corresponding to pins. Has been.

  And the load on the outer peripheral structure when horizontal forces such as strong winds and earthquakes are applied is reduced compared to the conventional center core structure that rigidly joins both ends of the beam material, and the load on the core body increases instead. It has become.

  For this reason, an outer periphery structure can be made into an economical structure compared with the past. For example, it is possible to construct a multi-layered building with a sense of openness by widening the interval between columns forming the outer peripheral structure.

  In addition, when using pin joints, beam materials and fixtures can be machined more easily than rigid joints, and the tolerance for construction errors is large, resulting in excellent on-site workability and shortening the construction period. it can.

  Furthermore, by forming the core body from reinforced concrete and the beam material from steel, it is possible to form a multi-layered building that balances the difficulty of shaking and the weight.

  In addition, the steel beam material is suitable for a large span because it is a lightweight and strong material, and a large space can be formed between the core body and the outer peripheral structure. Furthermore, if it is a steel beam material, the process of an edge part and joining in the field can be performed easily.

  If the core body is a wall structure, the core body has high rigidity, and most of the required seismic performance can be satisfied by the core body. Furthermore, by forming the outer peripheral structure with columns and beams, a multilayer building with high openness toward the outside can be obtained.

  Moreover, the edge part of a beam material can be easily connected on-site by making a fixture protrude from each of a core body and an outer periphery structure.

It is the schematic diagram which showed the main structure of the high-rise building of embodiment of this invention. It is a perspective view explaining the structure by which the steel beam was spanned between the core wall and the outer periphery structure. It is a side view explaining the structure of the steel beam periphery spanned between a core wall and an outer peripheral structure. It is a perspective view explaining the process of constructing a perimeter structure. It is the figure which showed the shear force which generate | occur | produces in the outer periphery pillar and core wall which form an outer periphery structure when a horizontal force acts on a multilayer building with a burden factor.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram schematically showing a main structure of a high-rise building 1 as a multi-layer building of the present embodiment.

  The high-rise building 1 includes a core wall 2 as a core body that extends vertically in a tower shape on the foundation 11, an outer peripheral structure 3 that is erected at a position that is an outer periphery of the building, and a core wall 2 The main structure is constituted by steel beams 4,.

  One end of the steel beam 4 is connected to the core wall 2 via the pin joint 5A. The other end of the steel beam 4 is connected to the outer peripheral structure 3 via the pin joint 5B.

  As shown in FIGS. 1 and 2, the core wall 2 is erected at the center of the high-rise building 1 with reinforced concrete or steel reinforced concrete (hereinafter referred to as “reinforced concrete”). The core wall 2 may have any shape such as a rectangular shape in plan view that is a closed cross-section, and a U-shape in plan view that is an open cross-section.

  The core wall 2 is a main structural part for securing most of the rigidity and proof stress required for the high-rise building 1. Since the core wall 2 is constructed of reinforced concrete, the rigidity is increased, and the shaking generated during strong winds or earthquakes is reduced.

  On the other hand, as shown in FIG. 2, the outer peripheral structure 3 includes a plurality of outer peripheral columns 31,... As columns that are erected at intervals in the circumferential direction, and between the outer peripheral columns 31,. It is formed by the outer peripheral beams 32 as a beam to be bridged.

  As shown in FIG. 4, the outer peripheral column 31 can be formed in advance at a factory or the like by using precast concrete, for example. And from the upper end surface of this outer periphery pillar 31, the upper part of the main reinforcing bar 31a arrange | positioned inside a main body is made to protrude upwards.

  Moreover, as shown in FIG. 4, the crossing part 34 mounted in the outer periphery pillar 31, the outer peripheral beams 32 and 32 projected on both sides across the crossing part 34, and the bracket part extended in the core wall 2 direction And 33 are integrally formed of precast concrete.

  In the intersecting portion 34, through holes 34a,... For inserting the main reinforcing bars 31a,... Protruding from the outer peripheral column 31 are formed in accordance with the positions of the main reinforcing bars 31a,.

  Further, a part of the reinforcing bars 32a,... Are exposed on the outer circumferential beams 32, 32, and are used for joints with other members adjacent to each other. Further, a short beam-shaped bracket portion 33 projects from the intersecting portion 34 in a direction substantially orthogonal to the axial direction of the outer circumferential beams 32 and 32.

  The bracket portion 33 is formed to provide a pin joint portion 5B for attaching the steel beam 4 to the outer peripheral structure 3. That is, as shown in FIG. 3, the pin joint portion 5 </ b> B is provided on the end surface of the bracket portion 33 on the core wall 2 side.

  The pin joint portion 5B is mainly configured by, for example, a mounting steel plate 51B as a fixture partially embedded in the bracket portion 33, and a bolt 52 that joins the steel beam 4 to the mounting steel plate 51B.

  Here, the steel beam 4 has, for example, a plate-like web 41 and flanges 42 and 42 formed so as to be substantially orthogonal to the web 41 at the upper edge and the lower edge thereof in a substantially I-shaped or H-shaped cross-sectional view. It is made of steel.

  Then, the exposed exposed surface of the mounting steel plate 51 </ b> B is placed along the side surface of the web 41 of the steel beam 4, and the mounting steel plate 51 </ b> B and the web 41 are joined by the bolt 52. The joint via the bolt 52 is a pin joint or a joint corresponding to a pin.

  Here, pin joining refers to joining in which rotation is allowed and little rotational moment is transmitted. Further, the joint corresponding to the pin refers to a joint in which the rotational moment generated is much smaller than that in the case of rigid joining.

  On the other hand, the pin joint portion 5A on the core wall 2 side of the steel beam 4 includes, for example, a mounting steel plate 51A as a fixture partially embedded in the core wall 2, and a bolt 52 that joins the steel beam 4 to the mounting steel plate 51A. It is mainly composed of

  Further, a plurality of gibbles 61,... Project from the upper surface of the upper flange 42 of the steel beam 4, and the floor slab 6 is formed by concrete cast on the upper surface of the steel beam 4 and the bracket portion 33. The

  The pin joints 5A and 5B described above are the floor slab 6 fixed to the steel beam 4 while the mounting steel plates 51A and 51B and the steel beam 4 are joined using a plurality of bolts 52 and 52, respectively. Is extended to the bracket portion 33. For this reason, both ends of the steel beam 4 bridged between the core wall 2 and the outer peripheral structure 3 through the pin joint portions 5A and 5B are theoretical pin joints in which no rotational moment is transmitted. That's not true. However, since the rotational moment generated is smaller than that of the rigid joint, the pin joint portions 5A and 5B can be said to be joints corresponding to at least pins.

  Next, the effect | action of the high-rise building 1 of this Embodiment is demonstrated.

  The high-rise building 1 according to the present embodiment configured as described above has an outer peripheral structure body in which both ends of the steel beam 4 spanned between the outer peripheral structure body 3 and the core wall 2 are joined by pin joint or joint equivalent to a pin. 3 and the core wall 2 are connected to each other.

  Here, FIG. 5 shows the shear rate of each member on each floor when the seismic load is applied as a horizontal force to a 27-story high-rise building model with a center core wall structure. It is a figure.

  Here, the legend of filling shows the result of the calculation model of the present invention in which both ends of the steel beam 4 spanned between the core wall 2 and the outer peripheral column 31 are set to pin joint. The white legend shows the result of the calculation model of the conventional center core wall structure in which both ends of the steel beam 4 spanned between the core wall 2 and the outer peripheral column 31 are set to be rigidly connected.

  According to FIG. 5, the shear rate of the outer peripheral column 31 is larger when rigidly joined. On the other hand, the load factor of the shearing force of the core wall 2 is larger when pin-bonded.

  That is, when a horizontal force such as an earthquake load is applied, the load on the outer peripheral structure 3 is reduced in the case of pin joining compared to the center core structure in which both ends of a conventional beam member are rigidly joined. The load on the core wall 2 is increased when bonded.

  For this reason, it can be set as the economical structure which reduced the cross section of the outer periphery structure 3 compared with the past. For example, since the cross section of the outer peripheral structure 3 can be reduced, it is possible to widen the interval between the outer peripheral pillars 31,..., And the high-rise building 1 with a feeling of opening can be constructed.

  Further, when the pin joint portions 5A and 5B are used, the ends of the steel beam 4 and the mounting steel plates 51A and 51B can be easily processed as compared with the rigid joint. Furthermore, even if some construction errors occur in the distance between the mounting steel plates 51A and 51B, the mounting position on the steel beam 4 can be easily adjusted, so that the workability on site is excellent and the mounting work is performed in a short period of time. be able to.

  Furthermore, when the core wall 2 and the outer peripheral structure 3 are formed of reinforced concrete and the beam material is a steel beam 4, it is possible to reduce the weight compared to the case where all are formed of reinforced concrete, and the case where all are formed of steel frames. Compared with, it is possible to reduce the shaking generated during an earthquake. That is, it can be set as the high-rise building 1 with which balance of the difficulty of shaking and weight was taken.

  Further, the steel beam 4 is a lightweight and strong material for pulling, so it is suitable for a large span (for example, 12 m or more), and a large space can be formed between the core wall 2 and the outer peripheral structure 3. Furthermore, if it is the steel beam 4, an edge part can be easily processed into the desired form.

  Moreover, if the attachment steel plates 51A and 51B are protruded from the core wall 2 and the outer peripheral structure 3 and the joining at the site is the operation of tightening the bolts 52, it can be easily performed.

  Further, if the wall structure is made of reinforced concrete like the core wall 2, the rigidity is high, and the core wall 2 can satisfy most of the required seismic performance. Furthermore, by forming the outer peripheral structure 3 with the outer peripheral column 31 and the outer peripheral beam 32, the high-rise building 1 with high openness toward the outside can be obtained.

  Further, by using a precast concrete member such as the outer peripheral column 31 and the outer peripheral beam 32 for the outer peripheral structure 3, a stable and high-quality outer peripheral structure 3 can be quickly constructed.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the above-described embodiment, the high-rise building 1 has been described as a multi-layer building. However, the present invention is not limited to this, and the present invention is also applied to a low-rise multi-layer building constructed for a factory, a store, a research facility, or the like. Can be applied.

  Moreover, in the said embodiment, although the pin junction part 5A, 5B provided in the both ends of the steel beam 4 demonstrated the structure which is joining equivalent to a pin, it is not limited to this, A rotatable pin structure etc. It is possible to make the connection closer to the theoretical pin connection.

  Furthermore, in the said embodiment, although the case where a part of attachment steel plate 51A, 51B was embed | buried under the core wall 2 or the bracket part 33 was demonstrated, it is not limited to this, A hook-shaped reinforcing bar is attached to the edge part of a steel plate. A fixing unit such as the above may be provided, and the fixing unit may be embedded in the core wall 2 or the bracket unit 33.

  Moreover, although the said embodiment demonstrated the case where the attachment steel plate 51A was embed | buried in the core wall 2, it is not limited to this, When there is a pillar part which comprises a core body, it attaches to the pillar part The structure which embeds steel plate 51A may be sufficient.

  Furthermore, in the said embodiment, although the case where the outer periphery structure 3 was constructed | assembled with precast concrete was demonstrated, it is not limited to this, You may construct | assemble an outer periphery structure with steel frames, reinforced concrete, or steel reinforced concrete. .

  Moreover, although the said embodiment demonstrated the case where the outer periphery structure 3 was formed with the outer periphery pillar 31 and the outer periphery beam 32, it is not limited to this, The structure in which the outer periphery structure was provided with the structural wall It may be. Furthermore, in the said embodiment, although the bracket part 33 was provided and the attachment steel plate 51B was attached, it is not limited to this, You may protrude a fixture directly from the side surface etc. of the outer periphery pillar 31. FIG.

  Moreover, although the case where the steel beam 4 was used as a beam material was demonstrated in the said embodiment, it is not limited to this, The beam etc. of the composite structure of steel materials and reinforced concrete can also be used.

1 High-rise building (multi-story building)
2 Core wall (core body)
3 outer peripheral structure 31 outer peripheral column (column)
32 Peripheral beam
4 Steel beams (beam materials)
5A, 5B Pin joint (pin joint or joint equivalent to a pin)
51A, 51B Mounting steel plate (mounting tool)
52 volts

Claims (3)

A multi-layer building having a core body extending in the vertical direction inside,
Both ends of a beam member spanned between the outer peripheral structure standing on the outer periphery and the core body are connected to the core body and the outer peripheral structure by pin joints or joints corresponding to pins, respectively. Structure,
The core body and the outer peripheral structure are formed of reinforced concrete, and the outer peripheral structure body is integrally provided with a bracket portion extending in the direction of the core body,
Before Kiharizai is formed by steel having a web Rutotomoni from facing position of the bracket portion of the front SL core member and the outer peripheral structure projecting toward the mounting steel plate part they are buried respectively A multi-layered building characterized in that a web of the beam material is placed on the mounting steel plate and joined by bolts. The multi-layer building according to claim 1, wherein the core body has a wall structure. Said perimeter structures is a multilayer building according to claim 1 or 2, characterized in that it is formed by the columns and beams.

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