JPH0444670B2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to the structure of mid-to-high-rise buildings such as hotels and apartment complexes, and more specifically, the present invention relates to the structure of medium-to-high-rise buildings such as hotels and apartment complexes. This relates to the improvement of earthquake-resistant walls.

[Prior Art] Conventional medium- and high-rise buildings constructed of steel-framed reinforced concrete usually have the first and second floors as a low-rise section for special purposes, and the upper floors are stacked with standard floors of the same structure to form a high-rise section. It is provided in hotel rooms or general residences. In such a standard floor, the walls installed in the direction between the beams simultaneously constitute the boundary wall between adjacent units, and whether they form an earthquake-resistant frame together with the frame frame as an earthquake-resistant wall, or are simply a partition, Reinforced concrete construction (hereinafter referred to as
The walls are said to be of precast concrete construction. This is a hotel room or
Boundary walls of residential buildings are mainly used for the purpose of utilizing the excellent sound insulation properties of concrete walls, for privacy and noise isolation from neighbors.

In recent years, the scale of hotels and residences has been increasing, and in the formation of standard floor plan units,
The arrangement of columns and beams has been taken into consideration, studs are installed in the direction of the columns, and partition walls are installed here to streamline the unit configuration.

On the other hand, in the earthquake-resistant structure of medium-to-high-rise buildings, a precast concrete slab with built-in rhombus-shaped braces is erected between two pillars to form an earthquake-resistant wall, and these walls are made of steel frames. The invention of a structure in which the structure is layered vertically without incorporating beams,
It is known as ``Continuous shear walls for buildings using the H-PC method'' in Japanese Patent Application Laid-Open No. 164866/1983.

[Problems to be solved by the invention] Conventional reinforced concrete door partition walls are treated as rough walls from an earthquake-resistant structure perspective, and do not contribute to the horizontal force at the time of design, and do not contribute to the load. Since this would only place a burden on the rigid frame and the earthquake-resistant walls within the rigid frame, it is inevitable that the frame structure would become heavy. In addition, seismic walls and partition walls built within a structure of columns and beams as described above have the disadvantage that the column and beam shapes protrude, making it difficult to use space efficiently and in construction, especially in the upper part. .

On the other hand, a continuous shear wall like the one in the previous example is suitable for the end part of a building, but because of the diamond-shaped struts, it is difficult to provide openings, and It is not suitable for structures in the beam-to-beam direction.

[Means for Solving the Problems] The present invention was developed with the aim of eliminating the above-mentioned drawbacks and improving economic efficiency. , the function of earthquake-resistant walls was reexamined, and the frame structure on the standard floor with a central hallway was limited to two central columns that sandwich the external pillar and the central hallway, and a girder that connects the tops, and the structure was built internally. The gist of the project is to make the shear wall bear the horizontal force. Further, in the second aspect of the present invention, when the outer column and the inner column have studs in the longitudinal direction, the frame frame and the partition wall constitute an earthquake-resistant intermediate frame similar to the main frame, The horizontal force is also applied to the partition wall. The above-mentioned earthquake-resistant frame is characterized by connecting earthquake-resistant walls in a series in the vertical direction through each standard floor, and without constructing girders at the floor level of each floor. This is a successful improvement of the seismic structure in connection with the application of walls.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS A high-rise building having shear walls according to the present invention will be described in detail based on drawings showing preferred embodiments. FIG. 1 is a cross-sectional view showing the frame in the inter-beam direction of a standard part of a high-rise building 1 made of steel-framed reinforced concrete, taking a hotel as an example. The building 1 consists of a low-rise building 1A and a high-rise building 1B. High-rise section 1B is standard floor 2
is laminated with 8 layers. 3 is an outer pillar, 4 is a middle pillar, and a middle corridor 5 runs between the middle pillars 4 in the row direction. There is no large beam between the outer column 3 and the middle column 4, and a large beam 6 is installed only at the top, and the middle columns 4 form a frame connected by steel beams 7 on each floor. 8 is the outer pillar 3 at the position of each floor,
This is a beam girder installed between the middle columns 4 in the usual manner.

FIG. 2a shows a plan view of a standard floor 2 of a second, more practical embodiment of the present invention. In the figure, 9 is a stud of the outsourcing 3 in the column direction, and 10 is a stud of the middle column 4 in the column direction. Both studs 9 and 10 are outer pillar 3 and middle pillar 4.
The cross section is smaller than. The frame in the inter-beam direction including the outer columns 3 is defined as the main frame 11, the frame including the studs 9 and 10 as the intermediate frame 12, and the wall of the main frame 11 is the earthquake-resistant wall 1.
3. The partition wall of the intermediate frame 12 is defined as the door boundary wall 14. Also shown in Figure 1, 15 is the outer wall, 16
17 is the inner wall of the middle hallway, and 17 is each floor and floor slab.
The earthquake-resistant wall 13 and the door boundary wall 14 are walls made of reinforced concrete with the same structure, and have an outer column 3 and a middle column 4.
and between the studs 9 and 10, but since there is no girder between them, the shear wall 1
3 and the door boundary wall 14 are directly connected vertically in series. Since the structure of the lower-rise section 1A is a normal rigid-frame structure, a detailed explanation thereof will be avoided along with other detailed parts of the standard floor 2.

Figure b in Figure 2 is a plan view of the standard floor 2 of the building 1 that is the object of the specific invention of the present invention, or it is a more general high-level concept that does not have the intermediate frame 12 as shown in figure a. It shows Building 1, and is otherwise similar to Figure A, and the reference numbers are also the same for the corresponding parts.

Next, FIG. 3 is a drawing showing details of the earthquake-resistant wall 13, in which figure a is a front view and figure b is a vertical sectional view. Since the contents of door boundary walls 14 are all the same,
This will be explained as a seismic wall 13. The shear wall 13 has a thickness of
It is a reinforced concrete slab of 15 to 20 cm, and its vertical side edges are connected to the outer columns 3 and middle columns 4, and its upper and lower edges are connected to the upper and lower shear walls 13. A beam-shaped reinforcing bar assembly 20 is buried near the upper edge, and together with the lower one, it reinforces the upper and lower edges of the seismic wall 13 as a plate, and supports the load of the floor slab 17 connected at the upper edge. do. Rebar assembly 20
As shown in detail in Fig. 4, the main reinforcements are an upper chord member 21 made of two reinforcing bars assembled in parallel with an interval, and a similar lower chord member 22, and a lattice member 23 of corrugated steel bars. Such rebar assemblies are available as commercially available commercial products known as "MICCO slabs". Note that 25 is a vertical reinforcing bar of the earthquake-resistant wall 13.

[Operation] The operation of the present invention will be explained based on the construction process and structural analysis of the building 1. Low-rise section 1A, high-rise section 1B
The construction of the main frame 11 and intermediate frame 12 of steel-framed reinforced concrete construction is as usual, but since the present invention does not have a cast-in-place reinforced concrete girder between the outer column 3 and the middle column 4, Earthquake-resistant wall 13
It is preferable that the door boundary wall 14 and the floor slab 17 be formed as precast concrete components using a prefabricated method, and erected using a dry structure in accordance with the preceding steel frame work. The details of these connections may be selected as appropriate. The steel girder 7 that connects the middle columns 4 connects the frames on both sides of the middle corridor 5, transmits horizontal force smoothly, and structurally makes the entire building 1 an earthquake-resistant frame with high toughness. It is possible to replace the structure of the floor slab 17 that connects the parts 5 to each other by making it rigid, and the connection by the girder 7 is not essential. When this girder 7 is omitted, a margin is created in the ceiling height of the middle corridor, and sufficient height can be secured for the entrances and exits of each part.

The reinforcing bar assembly 20 built into the seismic wall 13 and the door boundary wall 14 uses deformed steel bars with a diameter of 16 mm as the upper chord members 21 and lower chord members 22, and the lattice members 23 as the main reinforcements.
Even if a 13 mm reinforcing bar is sandwiched between them, it will fit within the wall thickness with sufficient coverage, and the vertical reinforcing bars 25 of the wall will fit naturally between the main bars, and the structure is 22 mm.
cm, and unlike conventional girders, beam shapes are not formed on both sides of the upper part of the wall, eliminating complicated concrete forms and the hassle of their construction. This reinforcing bar assembly 20 supports the floor slabs on both sides and fully reinforces the horizontal sides of the wall. Moreover, when the floor slab 17 is made of a similar reinforcing bar assembly or a slab with ribs (the above-mentioned "MICCO slab"), the joints at the ends fit well and are applicable to the analysis of the earthquake-resistant frame of the present invention. Therefore, it is convenient to assume that the slab is a rigid body.

Now, when analyzing horizontal force as a pseudo three-dimensional model of a mid-to-high-rise building with shear walls according to the present invention, the finite element method is used to analyze cases with and without conventional large beams in the direction between the beams. I made a comparison based on the performance quality used. The assumed conditions were that the slabs on each floor were rigid floors with the above structure, and that the coefficient of the primary design shear force used for pressurization was set from 1 to 3.2. The results show that there is no noticeable difference in the elasto-plastic response when the standard floor 2 shown in the example has 8 floors, indicating that the beam has more bearing capacity in the relationship between horizontal force and deformation. The difference is very small. Furthermore, no major differences were observed in the crack pattern diagrams. In conclusion, the earthquake-resistant frame of the present invention that incorporates continuous shear walls does not generate stress at the girders on each floor, and has succeeded in reducing the number of girders that require a large amount of construction work for the intended purpose. It is something. According to the trial calculations for the example buildings, there are differences in the presence or absence of the intermediate frame 12, but in steel materials such as the steel frame for the frame and the brace reinforcing bars for the beams,
According to the present invention, it was 54 to 58 Kg/m ² compared to 68 to 74 Kg/m ² when using the conventional design method. In addition, a trial calculation showed that the amount of steel was reduced to 30 kg/m ² for standard floor 2 only. Regarding the entire building 1, the share of the earthquake resistance of the intermediate frame 12 was about 1/2 to 1/3 of that of the main frame 11. Also, regarding the mutual relationship between the two frames, it cannot be overlooked that the beam girder 8 acts as an axial spring.

[Effect of the invention] The high-rise building having the earthquake-resistant wall of the present invention has a framework frame in the direction between the beams of the high-rise section, with the outer column and the two walls sandwiching the middle corridor.
The central pillar of the book is connected to the main beam on the top floor, earthquake-resistant walls are erected on this structure, and these earthquake-resistant walls are connected in a series in the vertical direction to form an earthquake-resistant frame. As the second invention, an earthquake-resistant frame is constructed by applying it to a building having a main structure and an intermediate frame. Made it possible to handle it as a structure. As a result, the effect of reducing the number of girders on each floor is more than 20% in terms of the amount of work required for both steel and concrete, and the economic results should be extremely large. In addition, in the partition walls of guest rooms and residences, we not only ensure sound insulation through concrete walls, but also simplify the complicated construction work on beam-shaped sections, improve space utilization efficiency, and improve the floor height of the entire building. It is clear that it also contributes to the reduction of high costs and improves economic efficiency from other aspects.

[Brief explanation of the drawing]

The drawings show an embodiment of a high-rise building having earthquake-resistant walls according to the present invention, in which Fig. 1 is a sectional view of a standard frame frame structure, Fig. 2 is a plan view, and Fig. a shows a preferred example of a standard floor. , b are examples of more general standard floors. Figures a and b in Figure 3 are respectively a front view and a vertical sectional view of the bulkhead shown as a seismic wall, and Figure 4 is a detailed view of the reinforcing bar assembly. 1...Building, 1A...Low rise area, 1B...High rise area, 2...Standard floor, 3...Outer pillar, 4...Middle pillar, 5
... Middle corridor, 6 ... Top floor beam, 7 ... Steel beam, 8 ... Girder beam, 9 ... Stud of outer column, 10 ... Stud of middle column, 11 ... Main frame, 12 ... intermediate frame,
13... Earthquake-resistant wall, 14... Door boundary wall, 17... Floor slab, 20... Rebar assembly.

Claims (1)

[Scope of Claims] 1. In medium-to-high-rise buildings such as hotels that have shear walls arranged on a steel-framed reinforced concrete frame frame, the frame frame in the direction between the beams of the high-rise section, which is constructed by stacking standard floors, is constructed by using external columns. A pair of central pillars sandwiching the central corridor, a large beam on the top floor that connects the tops of these pillars continuously, and a structure built between the outer pillar and the central pillar for each floor within this structure. A high-rise building having an earthquake-resistant frame consisting of an earthquake-resistant wall, characterized in that floor-level beams are built into the earthquake-resistant wall, and the earthquake-resistant walls are connected in series in the vertical direction. 2. Claim 1, characterized in that the central pillars are connected by steel girders above the central corridor on each floor, and the seismic walls on both sides of the hallway are connected.
High-rise buildings with earthquake-resistant walls as described in Section 1. 3. Claim 1, characterized in that the earthquake-resistant wall incorporates a beam-type reinforcing bar assembly within the wall thickness of the upper edge for reinforcing the upper and lower edges of the wall and supporting the slab on the upper floor.
A high-rise building having a seismic wall as described in paragraph 2 or paragraph 2. 4 Medium-to-high-rise buildings such as hotels that have a steel-reinforced concrete framework with shear walls, and the framework structure in the direction between the beams of the high-rise section, which is composed of stacked standard floors, has external columns and A pair of central pillars across the hallway,
It is an earthquake-resistant structure consisting of a girder on the top floor that continuously connects the tops of those columns, and a seismic wall built between the outer column and the middle column for each floor within this structure.
In a high-rise building with a shear wall in which the floor-level beams are built into the shear wall and the shear walls are connected in a series in the vertical direction, this building has studs in the girder direction between the outer column and the middle column. A high-rise building having a seismic wall, characterized in that these studs and the door boundary wall form an earthquake-resistant intermediate frame similar to the earthquake-resistant frame including the outer column and the inner column. . 5. The seismic resistance according to claim 4, characterized in that the central pillar and the intervening pillars are connected by a steel girder above the central hallway of each floor, and the seismic walls on both sides of the hallway are connected. A high-rise building with walls. 6. A patent claim characterized in that the earthquake-resistant wall and the partition wall have a beam-type reinforcing bar assembly built-in within the wall thickness of the upper edge for reinforcing the upper and lower edges of the wall and supporting the slab on the upper floor. High-rise buildings having earthquake-resistant walls as described in scope 4 or 5.