JP2010059646A - Reinforced concrete base isolation frame structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To increase working efficiency by simplifying construction and reduce construction cost for a building. <P>SOLUTION: The building comprises an RC base isolation frame structure which forms an outer peripheral frame structure by vertically and laterally connecting a plurality of precast concrete outer wall PC panels 2 comprising column frames 21 and beam frames 22 combined with each other in a lattice shape, in which an RC core wall and the outer wall PC panels 2 are used as the main frame structure of the building, and which has a base isolation device at the lower layer part of the building. The outer wall PC panel 2 is formed in a generally lattice shape in front view. Earthquake resistant wall panels 25 are assembled in first openings 2a-2d on the upper stage surrounded by the column frames 21 and the beam frames 22. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an RC seismic isolation frame in a super high-rise RC building.

  In recent years, high-rise offices exceeding 100m have been required to have high seismic performance, and the demand for seismic isolation has increased. However, most high-rise offices are constructed of non-base-isolated steel structures. Currently. This is because when the seismic isolation method is adopted, if the superstructure is a steel structure, there is a structural problem that the frame rigidity is low and a sufficient seismic isolation effect cannot be obtained. In many office buildings, the outer frame is often made of steel. When the outer frame is made of steel as described above, a precast concrete plate (PC plate) is generally used as a decorative material for the exterior material (see, for example, Patent Document 1). .

In Patent Document 1, an outer wall unit composed of a glass curtain wall constituting a horizontal window and a PC curtain wall made of precast concrete that becomes a waist wall on the upper floor connected to the upper part of the column after standing the pillar upright. And a building constructed by constructing a floor slab on the upper floor on a beam provided integrally with the outer wall unit.
JP 2001-164757 A

However, in a building composed of a peripheral frame that is a combination of a conventional peripheral steel frame and an exterior PC plate as shown in Patent Document 1, there are the following problems.
That is, at the time of construction at the site, first, the steel frame of the column beam is assembled, the panel material (PC plate) is attached to the outer peripheral surface, concrete is placed on the indoor side of the PC plate, and the window glass is attached to the panel material. Since it was constructed by the process of attaching, there was a problem that the number of man-hours at the site was large and the construction took a long time.
In addition, since the structure uses a large amount of expensive steel frames, the construction cost increases as the material cost increases, so there is room for improvement in that respect.

  The present invention has been made in view of the above-mentioned problems, and provides an RC seismic isolation frame that can improve work efficiency by simplifying the construction and that can reduce the construction cost of the building. With the goal.

  In order to achieve the above object, the RC seismic isolation frame according to the present invention is an RC seismic isolation frame having an RC core wall inside the building, and is a precast in which a column frame and a beam frame are combined in a lattice shape. A plurality of concrete outer wall PC panel frames are connected in the vertical and horizontal directions to form an outer frame, the RC core wall and outer wall PC panel frame are used as the main frame of the building, and a seismic isolation device is provided in the lower part of the building. It is characterized by being.

In the present invention, an outer frame that forms a rigid frame by arranging a plurality of outer wall PC panel frames having functions of an exterior material and a structural frame, and a RC frame, and a pillar frame and a beam frame that are integrally formed and precast. Since the wall is the main frame, it is possible to form an RC frame composed of an upper frame having a higher rigidity than conventional S and CFT buildings. In addition to these main frames, the seismic isolation device is built into the lower part of the building, so it is possible to achieve high seismic performance that maintains the building function even during an earthquake. Applicable to high-rise buildings. In addition, since each outer wall PC panel frame is made of precast concrete, for example, it is possible to cast concrete on the spot only at the joint between adjacent outer wall PC panel frames. Simplification can be achieved.
And since the outer wall PC panel frame also serves as a structural housing, it can be structured such that a columnar shape does not appear in the room, and the indoor space can be used effectively.

Moreover, in the RC seismic isolation frame according to the present invention, the outer wall PC panel frame is preferably formed in a substantially square shape when viewed from the front.
In the present invention, for example, the central column frame is a full PC column, the column frames located on both sides are half PC columns as connection portions that form half the cross-sectional dimension and width dimension of the full PC column, Further, an outer wall PC panel frame can be formed by arranging a beam frame at the lower part and integrally forming a square shape.

In the RC seismic isolation frame according to the present invention, the outer wall PC panel frame may have a seismic wall panel incorporated in an opening surrounded by the column frame and the beam frame.
In the present invention, the seismic wall panel for stiffness adjustment is arranged in the opening formed in the outer wall PC panel frame in a well-balanced manner so as to effectively work against the vertical load and horizontal load as the building, so that Performance can be improved. That is, it is possible to adjust the stress burden rate of the outer frame by adjusting the amount of the earthquake resistant wall panel in the height direction of the building. Then, by incorporating the earthquake-resistant wall panel in an arbitrary opening of the outer wall PC panel frame in advance, the work man-hour at the time of construction can be reduced, and the work efficiency can be improved.

In the RC seismic isolation frame according to the present invention, it is preferable that a window glass panel is incorporated in an opening portion surrounded by a column frame and a beam frame in the outer wall PC panel frame.
In the present invention, by incorporating a window glass panel in an arbitrary opening of the outer wall PC panel frame in advance, the number of work steps during construction can be reduced, and work efficiency can be improved.

Further, in the RC seismic isolation frame according to the present invention, a solar power generation panel may be incorporated in an opening portion surrounded by the column frame and the beam frame in the outer wall PC panel frame.
In the present invention, the outer frame can be provided with the function of photovoltaic power generation, and by incorporating the photovoltaic power generation panel in an arbitrary opening of the outer wall PC panel frame in advance, the work man-hours during construction can be reduced. It is possible to improve work efficiency.

  According to the RC seismic isolation frame of the present invention, the outer wall PC panel frame having the functions of the exterior material and the structural frame and the RC core wall are used as the main frame, so that the RC frame composed of the rigid upper frame. Furthermore, in addition to these main frames, it is a structure that incorporates a seismic isolation device in the lower part of the building, so it is possible to ensure high seismic performance that maintains the building function even during an earthquake, for example 100m It can be applied to super high-rise buildings. In addition, since each outer wall PC panel frame is made of precast concrete, the construction is simplified, work efficiency can be improved, and the steel frame is not used in the outer frame as in the past, so that expensive steel frames The amount used can be reduced, and the cost can be reduced.

Hereinafter, an RC seismic isolated frame according to an embodiment of the present invention will be described with reference to FIGS.
1 is a front view showing the appearance of a building according to an embodiment of the present invention, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a perspective view of an outer wall PC panel forming an outer frame, and FIG. It is the front view seen from the outer wall side of an outer wall PC panel, Comprising: The T section enlarged view shown in FIG. 1, Fig.5 (a) is BB sectional drawing shown in FIG. 4, (b) is CC line similarly 6A is a cross-sectional view taken along the line DD shown in FIG. 4, and FIG. 6B is a cross-sectional view taken along the line EE.

The code | symbol 1 of FIG. 1 has shown the building comprised from the RC seismic isolation frame by this Embodiment.
As shown in FIGS. 1 and 2, the main building 1 is intended for a super high-rise building having a height of, for example, more than 100 m, and includes a plurality of outer wall PC panel frames (hereinafter simply referred to as “outer wall”). PC panel 2 ”), a reinforced concrete core wall (hereinafter referred to as“ RC core wall 3 ”) that is disposed inside the building 1 and has a flat cross-section formed in a generally rectangular shape in plan view, It has a hybrid structure configured by a combination with the base isolation device 4 provided in the base portion (corresponding to the lower layer portion of the present invention).

As shown in FIG. 2, the RC core wall 3 has a generally rectangular shape in plan view as described above, and the depth direction (Y direction in FIG. 2) is one side (the paper surface in FIG. 2) at the center in the width direction of the building 1. It is arranged at a position close to the upper side), has proof strength and toughness, and has a function as a core rod of the building 1. The RC core wall 3 includes an elevator shaft, a hall, a staircase, a machine room, and the like, and a substantially concave indoor space is disposed around the RC core wall 3. In the present embodiment, the PC curtain wall 5 is provided at a position corresponding to one side of the RC core wall 3 on the exterior material on the side where the RC core wall 3 is approached. The RC core wall 3 is joined to the outer wall PC panel 2 on each floor by a steel beam (not shown) by both-end pin bonding, and a floor set is formed on the steel beam.
For both the PC core wall 3 and the boundary beam, for example, during an extremely rare level 2 earthquake, it is within the short-term allowable stress level, and within the ultimate strength at the margin examination level (level 2 × 1.5). Is set to

  As shown in FIGS. 3 to 6, the outer wall PC panel 2 is applied as a frame of two or more floors of the building 1 (see FIG. 1), and is made of precast concrete having functions of an outer wall material and a structural frame, It has a substantially square shape when viewed from the front shown in FIG. 3 is a partially simplified view showing a state in which a window glass panel 23, a photovoltaic power generation panel 24, and a seismic wall panel 25, which will be described later, are not incorporated, and the front view of FIG. 5 (a) and 5 (b), the left side is the outer wall side with the outer wall PC panel 2 sandwiched toward the paper surface in the side sectional views of FIGS. 5 (a) and 5 (b). ) In the horizontal sectional view, the lower side is the outer wall side of the outer wall PC panel 2 facing the paper surface.

  As described above, the outer wall PC panel 2 is integrally formed in a substantially square grid pattern by combining the column frame 21 and the beam frame 22, and has four openings 2 a partitioned by the frames 21 and 22. 2b, 2c, 2d are formed. In the building 1, a plurality of such outer wall PC panels 2, 2,... Are arranged in a vertical and horizontal direction, thereby forming an outer frame that constitutes a ramen frame.

  The outer wall PC panel 2 has a rectangular shape in which the length in the vertical direction is longer than that in the horizontal direction (for example, the vertical dimension is 4.2 m and the horizontal dimension is 3.2 m), and the four openings 2 a to 2 d. The position of the central beam frame 22A is arranged above the center in the vertical direction so that the first openings 2a, 2b located in the upper stage are substantially square. That is, the first openings 2a and 2b located in the upper stage have a square shape, and the second openings 2c and 2d located in the lower stage have a rectangular shape longer in the vertical direction than the first openings 2a and 2b. .

  The central column frame 21A disposed in the center in the lateral direction is a full PC column having a column cross section necessary for the building 1, and the junction column frames 21B and 21B located on both sides thereof are half cross sections of the central column frame 21A ( It becomes a half PC pillar which becomes (width dimension). As shown in FIG. 6, each joining column frame 21 </ b> B has a notch 21 a (concrete placement portion) recessed in the room on the side surface adjacent in the horizontal direction, and the outer wall PC panel 2 adjacent in the horizontal direction. The notched portions 21a and 21a of the two joining column frames 21B (half PC columns) are brought into contact with each other, and the concrete C is placed on the concave portions formed at that time, thereby being connected in the lateral direction. Yes. In addition, the connection of the vertical direction becomes a structure connected by the coupling 26 (refer FIG. 3) built in the joint surface of both the beam frames 22. FIG. In other words, the outer wall PC panel 2 has a structure in which only the joining column frame 21B is used as a spot-on-site portion for connection to each other. Further, as shown in FIG. 5, the beam frame 22 located at the upper part and the intermediate part is formed with an overhanging part 22a whose outer part protrudes, and the overhanging part 22a has a function of a ridge. It has become.

  Moreover, in this outer wall PC panel 2, it is the structure where the window glass panel 23, the photovoltaic power generation panel 24, and the earthquake-resistant wall panel 25 were suitably integrated in the 1st opening part 2a, 2b located in an upper stage, and is located in a lower stage. Each of the second openings 2c and 2d has a structure in which a window glass panel 23 is incorporated, and has a multifunctional structure. That is, in FIGS. 4 to 6, the earthquake-resistant wall panel 25 is formed in one of the first openings 2a and 2b (on the left side in FIG. 3) and the opening 2b in the other (on the right side in FIG. 3). A power generation panel 24 is incorporated.

  As shown in FIGS. 5 (b) and 6 (a), the solar power generation panel 24 has a solar power generation function on the outer frame, and is a well-known solar cell module formed in a plate shape. In the upper first openings 2a and 2b, the outer wall PC panel 2 is located on the outer side in the thickness direction, or is substantially flush with the outer surface (in this embodiment, the overhanging portion 22a). (Corresponding to the tip position).

  As shown in FIG. 5 (a) and FIG. 6 (a), the earthquake resistant wall panel 25 is a reinforced concrete wall and is arranged at an appropriate position among all the outer wall PC panels 2, 2,. It is incorporated in the first openings 2a and 2b of the outer wall PC panel 2 and is formed integrally with the column frame 21 and the beam frame 22 so that the outer wall PC panel 2 has a rigidity adjusting function. .

Thus, the outer wall PC panel 2 has a structure that not only bears the axial force acting on the building 1 but also bears the seismic force.
And in the outer wall PC panel 2 of this building 1, the window glass panel 23, the photovoltaic power generation panel 24, and the earthquake-resistant wall panel 25 are set to the 1st opening part 2a, 2b, and the vertical load when the earthquake-resistant wall panel 25 is the building 1 is used. It is arranged in a well-balanced manner so as to work effectively against horizontal loads. That is, in this building 1, many seismic wall panels 25 are arranged in the lower layer 1 </ b> A of the building 1 close to the seismic isolation device 4, and more photovoltaic panels 24 are arranged in the upper layer instead of the seismic wall panels 25. Thus, the aperture ratio of the windows is almost uniform throughout the building 1.

Next, the seismic isolation device 4 shown in FIG. 1 is placed under the floor on the first basement floor, and by using a laminated rubber containing lead plugs, an elastic sliding bearing, and a linear slider in combination, the amount of lead plugs is adjusted. It is configured to eliminate the eccentricity between the center of gravity and the rigid center at the seismic layer position.
In addition, the seismic isolation device (linear slider) having pull-out strength is arranged at the four corners of the core to prevent the collapse mode of the building 1 from being determined by the fall of the RC core wall 3.
And the appropriate stress burden of the outer wall PC panel 2 can be ensured, for example, by arranging a pull-out allowable seismic isolation device at the outer corner.

Next, the action of the RC seismic isolation frame constructed in the building 1 constructed as described above will be described with reference to FIGS.
In this building 1, a pillar frame 21 and a beam frame 22 are integrally formed and precast, and a plurality of outer wall PC panels 2 having functions of an exterior material and a structural frame are arranged to constitute a frame structure. Since the RC core wall 3 is the main frame, it is possible to form an RC frame composed of a rigid upper frame compared to conventional S and CFT buildings. Furthermore, in addition to these main frames (outer wall PC panel 2 and RC core wall 3), the seismic isolation device 4 is incorporated in the lower layer 1A of the building 1, so that the building functions are maintained even during an earthquake. For example, it can be applied to a high-rise building exceeding 100 m.

And in this outer wall PC panel 2, the 1st opening part formed in the outer wall PC panel 2 with sufficient balance so that the earthquake-resistant wall panel 25 for rigidity adjustment works effectively with respect to the vertical load and horizontal load as the building 1 The earthquake resistance performance of the building 1 can be improved by arranging in 2a, 2b.
That is, the expected strength of the outer peripheral frame (column frame 21 and beam frame 22) of the outer wall PC panel 2 needs to be suppressed to a certain level or less, but the amount of the seismic wall panel 25 is adjusted in the height direction of the building 1. Then, adjust the stress burden rate of the outer frame, for example, confirm that each member is within the short-term allowable stress level even during a level 2 earthquake, and make each member below the ultimate strength even at the margin examination level. Is possible.

  Further, in the present embodiment, as shown in FIG. 1, the first floor portion is a feeler-deal frame in which a pillar is removed in a plane in a plan view, so that the long-term bending moment of the beam is maximum as the feeler-deal frame. By disposing the earthquake-resistant wall panel 25 at the position, the stress for long-term design of the beam can be reduced and the axial force can be smoothly transmitted to the seismic isolation device 4. And in the platform part, the vertical axial force from the outer wall PC panel 2 is once received by the SRC beam arranged on the outer circumference of the second floor level, and the stress concentration from the SRC pillar on the first floor to the seismic isolation device 4 below the first floor is performed. Can be planned. A pull-out allowable seismic isolation device is arranged at the outer corner, and it is possible to secure an appropriate stress load on the outer wall PC panel 2 by suppressing the generation of excessive tensile force on the column. Yes.

  Furthermore, seismic isolation devices (not shown) such as linear sliders with pulling strength are arranged at the four corners of RC core wall 3, and the pulling force generated by this seismic isolation device exceeds the limit strength of the device even at the margin examination level. By avoiding this, it is possible to prevent the collapse of the building 1 from being determined by the fall of the RC core wall 3, and it is possible to provide a fail-safe mechanism for the building 1.

  In addition, since each outer wall PC panel 2 is made of precast concrete, for example, it is possible to cast the concrete on the spot only at the joint between the adjacent outer wall PC panels 2 and 2, so that the amount of concrete placement is reduced, The construction can be simplified.

Furthermore, by incorporating the window glass panel 23, the photovoltaic power generation panel 24, and the seismic wall panel 25 in arbitrary openings 2a to 2d of the outer wall PC panel 2 in advance, it is possible to reduce the work man-hours during construction. The work efficiency can be improved.
Furthermore, in the outer wall PC panel 2, the main window glass panel 23, the photovoltaic power generation panel 24, and the earthquake-resistant wall panel 25 can be arranged with a function as an appearance design in addition to a structural function. .
Since the outer wall PC panel 2 also serves as a structural housing, it can be structured such that a columnar shape does not appear in the room, and the indoor space can be used effectively.

  As described above, in the RC seismic isolation frame according to the present embodiment, the outer wall PC panel 2 having the functions of the exterior material and the structural frame and the RC core wall 3 are used as the main frame, so that the upper part having high rigidity is provided. An RC frame consisting of a frame is formed, and in addition to these main frames, the seismic isolation device 4 is incorporated in the lower part 1A of the building 1, ensuring high seismic performance that maintains the building function even during an earthquake. For example, it can be applied to a high-rise building exceeding 100 m. In addition, since each outer wall PC panel 2 is made of precast concrete, the construction is simplified, work efficiency can be improved, and a structure that does not employ a steel frame in the outer frame as in the prior art, an expensive steel frame The amount used can be reduced, and the cost can be reduced.

Although the embodiments of the RC seismic isolation frame according to the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately changed without departing from the scope of the present invention.
For example, in the present embodiment, the shape of the outer wall PC panel 2 is a substantially square shape in front view, and four openings 2a to 2d are provided. However, the present invention is not limited to this. In short, any shape that is integrally combined in a lattice shape by the column frame 21 and the beam frame 22 may be used. And the window glass panel 23, the photovoltaic power generation panel 24, and the earthquake-resistant wall panel 25 can be arrange | positioned in a suitable position with respect to opening part 2a-2d, and it is seismically isolated as an outer periphery frame of the building 1 whole. In consideration of the arrangement of the device 4, the structure such as the earthquake resistance, or the design of the appearance, it can be arranged at an arbitrary place.

Further, the dimensions of the outer wall PC panel 2, the positions of the central column frame 21A, the central beam frame 22A, etc. may be set in accordance with the structure such as the earthquake resistance or the appearance design.
Further, the form and quantity of the seismic isolation device 4 and the size, strength, and position of the RC core wall 3 are not limited to the present embodiment, and depend on the construction conditions such as the height and shape of the building 1. Can be designed.
Furthermore, in the present embodiment, cutout portions 21a are provided on the joint surfaces on both sides of the outer wall PC panel 2, and the cutout portions 21a and 21a are joined when the outer wall PC panels 2 and 2 adjacent in the lateral direction are joined together. The concrete C is placed in the recessed portion formed by abutting. However, the present invention is not limited to this, and the outer wall PC panels 2 and 2 may be joined to each other only by a joint. Absent.

It is a front view which shows the external appearance of the building by embodiment of this invention. It is the sectional view on the AA line shown in FIG. It is a perspective view of the outer wall PC panel which forms an outer periphery frame. It is the front view seen from the outer wall side of an outer wall PC panel, Comprising: It is the T section enlarged view shown in FIG. (A) is the BB sectional drawing taken on FIG. 4, (b) is CC sectional drawing similarly. (A) is DD sectional view taken on the line shown in FIG. 4, (b) is the EE sectional view similarly.

Explanation of symbols

1 Building 2 External wall PC panel (External wall PC panel frame)
2a-2d Opening 21 Pillar frame 21a Notch 22 Beam frame 22a Overhang 23 Window glass panel
24 Photovoltaic power generation panel 25 Seismic wall panel 3 RC core wall 4 Seismic isolation device C Concrete

Claims (5)

RC building with RC core wall inside the building,
A plurality of precast concrete outer wall PC panel frames that combine columnar frames and beam frames in a lattice shape are connected in the vertical and horizontal directions to form an outer frame.
An RC seismic isolation frame characterized in that the RC core wall and the outer wall PC panel frame are used as a main frame of the building, and a seismic isolation device is provided in a lower part of the building.   2. The RC seismic isolated frame according to claim 1, wherein the outer wall PC panel frame is formed in a substantially square shape when viewed from the front.   3. The RC seismic isolated frame according to claim 1, wherein a seismic wall panel is incorporated in an opening surrounded by the column frame and the beam frame in the outer wall PC panel frame.   4. The RC structure according to claim 1, wherein a window glass panel is incorporated in an opening surrounded by the pillar frame and the beam frame in the outer wall PC panel frame. Seismic frame.   5. The RC structure according to claim 1, wherein a photovoltaic power generation panel is incorporated in an opening surrounded by the pillar frame and the beam frame in the outer wall PC panel frame. Seismic isolation frame.

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