JP3413584B2 - Construction method of frame structure - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the construction of a building having a pillar-free space without pillars in order to form a large space above the ground, for example. It relates to a suitable frame structure. 2. Description of the Related Art Conventionally, as shown in FIG. 4 , in order to form a large space 1 on the ground, pillars 2, 2,... The base floor 3 is installed in the base floor, and the upper floor 4 is provided thereon.
There is a building (frame structure) 5 having a column-free space 6 below. Needless to say, such buildings 5 are usually built up one by one from bottom to top. In such a building 5, since the load of the upper floor 4 above the base floor 3 is concentrated on the skeleton of the base floor 3, when the skeleton of the base floor 3 is designed, the load can be supported. Is well known. [0004] However, the conventional frame structure as described above has the following problems. That is, as described above, in order to support the entire load of the upper floor 4 by the frame of the reference floor 3, each member constituting the reference floor 3 has a large cross section capable of withstanding the load, There is a problem that it is very uneconomical. In addition, the combination of stress due to vibration during an earthquake and the like makes the design very complicated and difficult. This problem becomes more prominent as the building 5 becomes higher. In recent years, a structure has been adopted in which the load on the upper floor 4 is shared and supported by the reference floor 3 and the uppermost portion 5a by making the uppermost portion 5a of the building 5 a truss structure. Even in such a structure,
Until the construction of the uppermost portion 5a is completed, the entire load of the upper floor 4 is applied to the reference floor 3. For this reason, the reference floor 3 must have enough strength to support the load of the upper floor except for the uppermost portion 5a, and the stress due to the load of the upper floor 4 remains on the reference floor 3 even after the completion of the construction. Therefore, the above-mentioned problem has not been solved. The present invention has been made in consideration of the above points, and has as its object to provide a method of constructing a frame structure which is economical and can facilitate design. Means for Solving the Problems The invention according to claim 1 is:
An outer peripheral frame is composed of a core pillar erected on the outer peripheral portion, a reference truss structure of a truss structure provided above the ground surface by a certain dimension, and an uppermost truss structure of the truss structure. When constructing a frame structure consisting of a structure in which an intermediate layer frame is provided between the frame and the top layer frame
Then, the intermediate layer skeleton is divided into an upper layer and a lower layer, and the reference layer skeleton and the uppermost layer skeleton are joined to the core pillars at predetermined heights, respectively. A structure in which the load of the lower layer of the intermediate layer is supported, and the load of the upper layer of the intermediate layer is supported by the uppermost layer, and thereafter, the upper layer and the lower layer of the intermediate layer are joined. The construction method of the framed structure
Therefore, first, when the core pillar is constructed to a predetermined height, the reference layer frame is constructed at a predetermined height, and then the core pillar is constructed and the intermediate layer frame is constructed on the reference layer frame. After constructing the lower layer of the intermediate layer building,
When building the upper part of the inter-story building,
Without joining the upper column members, jack them between them
With the two pillars separated by a specified distance in the vertical direction
Was advance, after the person denominated to the top floor of the intermediate layer precursor is complete, the erection of the uppermost skeleton, after joining the upper part of the the top layer precursor intermediate layer precursor, said jack To
Operation to jack down the upper part of the middle structure
The distance between the upper column member and the lower column member
The dimensions will be the root gap for welding them
And then weld and join the column members together
It is characterized in that. According to the first aspect of the present invention, the reference layer frame and the uppermost layer frame are joined to the core pillar, and the reference layer frame supports the load of the lower layer of the intermediate layer frame. After the load of the upper layer portion of the intermediate layer body was supported, the upper layer portion and the lower layer portion of the intermediate layer frame were finally joined. This allows not only during construction, but also after joining the upper and lower layers of the intermediate layer skeleton,
It is possible to maintain a state in which the lower layer load is supported by the reference layer frame while the upper layer load is supported by the upper layer frame. In addition, an intermediate layer skeleton is built on the reference layer skeleton.
When building the upper part after building the lower part,
Without joining the lower column member and the upper column member
Insert a jack between them and separate them by a predetermined size.
After joining the upper layer of the middle layer to the upper layer
Jack down the upper part of the
The inter-dimension becomes the root gap for welding them
And then weld the column members together
It was configured to match. As a result, the lower layer
The load is supported, and the uppermost frame supports the upper layer load.
Finally, the upper and lower layers of the intermediate frame are joined
can do. Therefore, the load of the upper layer portion of the intermediate layer skeleton is supported by the uppermost layer skeleton, and the load of the lower layer portion is supported by the reference layer skeleton, not only during the construction but also after the completion of the construction. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the embodiments shown in FIGS. First, a frame structure to be constructed by applying the method for constructing a frame structure according to the present invention will be described.
As shown in FIG. 1, a building (frame structure) 10 is, for example, rectangular in a plan view, and has mega pillars (core pillars) 11, 11,... On both side surfaces 10a, 10a at both ends and an intermediate portion. Is erected. Each mega pillar 11 has a core wall structure mainly made of reinforced concrete, for example, having a rectangular shape in cross section that is continuous in the vertical direction, and accommodates, for example, elevators, various facilities, machine rooms, and the like. ing. The frame 12 of the building 10 supported by the mega pillars 11, 11,... Has a reference layer frame 13, which is the lowermost portion thereof, provided at a height corresponding to, for example, four floors above ground.
A large space 14 is formed below the large space 14. The reference layer frame 13 is provided, for example, between an upper chord member 13a and a lower chord member 13b which are arranged at a height of two floors.
It has a truss structure in which the column member 13c and the lattice member 13d are combined. Similarly, the uppermost frame 15 constituting the uppermost portion of the frame 12 has a height of, for example, two floors.
A truss structure in which a column member 15c and a lattice member 15d are combined between the upper chord material 15a and the lower chord material 15b. The reference layer frame 13 and the uppermost layer frame 15
In between, the intermediate layer skeleton 16 constituting each intermediate floor of the skeleton 12 is, for example, a steel frame, and usually includes columns 17 erected at regular intervals and beams 18 erected for each floor. It has a ramen structure. The above reinforced concrete mega column 1
1, a rigid megastructure (peripheral frame) 20 is composed of the reference layer frame 13 and the uppermost layer frame 15 of the steel frame truss structure. The frame 12 of the building 10 has an intermediate structure inside the megastructure 20. It has a configuration in which the layer frames 16 are arranged. Next, a method of constructing such a building 10 will be described with reference to FIGS. First, as shown in FIG. 2, mega pillars 11, 11,...
To build. After the construction work of these mega pillars 11 has progressed at least to the height above the height at which the reference layer frame 13 is to be built, the reference layer frame 13 is built at a predetermined height and Are joined to the columns 11, 11,... After the construction of the reference layer frame 13 is completed,
The construction work of each mega pillar 11 and the construction work of the intermediate layer frame 16 on the reference layer frame 13 proceed in parallel. Thus, the lower layer 1 of the intermediate layer frame 16 is formed.
When the predetermined floor F of the intermediate layer frame 16 is constructed by stacking and constructing the floor members 6a, the column member 17a constituting the floor F and the column member constituting the immediately lower floor F 'which has already been constructed are completed. 17′a is not joined. Then, after the assembly of the floor F is completed, as shown in FIG.
For example, jack mechanisms 22, 22 such as hydraulic jacks are interposed between 1 and the beam 18 on the lower floor F '. Then
The jack mechanisms 22 are extended at the same time so that the column members 17a and 17'a positioned above and below each other are separated by a predetermined dimension δ. Thereafter, as shown in FIG. 2, the construction of the mega pillar 11 and the construction of the upper layer portion 16b of the intermediate layer frame 16 are continued in the same manner as usual, and these are constructed up to the top. You. The uppermost frame 1 is placed on the intermediate layer 16.
The uppermost building 15 is joined to each of the mega pillars 11 and the intermediate building 16. At this point, the jack mechanisms 22, 22,...
The load on the lower portion 16a below the floor F where
It is supported by the reference layer frame 13. On the other hand, the load on the upper layer portion 16b above the floor F is also supported by the uppermost layer frame 15, but the jack mechanism 2
Are supported by the reference layer frame 13 via the lower layer portion 16a. Thereafter, all the jack mechanisms 22 are simultaneously contracted to lower the jacks. At this time, the initial separation dimension δ (see FIG. 3) of the column members 17a and 17′a before jack-down is reduced when the amount of flexing downward of the reference layer body 13 is reduced due to a decrease in the load at jack-down. , The separation dimension δ ′ of which is the upper and lower column members 17a, 17′a
Are set to be a root gap for welding to each other. That is, the pillar members 17 located at the top and bottom
a and 17'a are separated from each other by the distance δ 'without contact even after the jack-down. Then, the load on the lower portion 16a below the floor F on which these jack mechanisms 22 are installed is still supported by the reference layer frame 13, but the load on the upper portion 16b is The state is supported only by the uppermost frame 15. Therefore, as compared with the state before jack-down, the load supported by the reference layer frame 13 is reduced by the upper layer portion 16b, and the stress is released by that amount. After the jack-down is completed, the joints of the column members 17a and 17'a are welded and joined at this floor F. Thus, the construction of the frame 12 of the building 10 shown in FIG. 1 is completed. Thereafter, the lower layer portion 16 below the floor F on which the jack mechanism 22 is installed will be described.
a is supported by the reference layer frame 13 and the upper layer 1
The state where the load of 6b is supported by the uppermost frame 15 is maintained. In the construction method of the building 10 described above, the intermediate layer frame 16 is constructed on the reference layer frame 13, and when the intermediate layer frame 16 of the predetermined floor F is constructed, the floor F
Of each of the pillar members 17a and the pillar member 17'a of the immediately lower floor F 'previously constructed without joining the jack mechanism 2 between them.
After the upper layer 16b and the uppermost frame 15 are erected, the jack mechanism 22,
, Are removed, and the column members 17 located above and below are removed.
a, 17'a were welded and joined. Thus, after completion of the building 10, the load of the lower layer 16a below the floor F on which the jack mechanism 22 is installed is supported by the reference layer frame 13, and the load of the upper layer 16b is supported by the upper layer frame 15. Will be. In this way, the load of the intermediate layer frame 16 is shared and supported by the reference layer frame 13 and the uppermost layer frame 15 of the truss structure, respectively, so that the cross-sectional dimension of each member constituting the reference layer frame 13 is particularly reduced. And this can be economical. Further, when designing the reference layer frame 13 of the building 10, it is possible to support the load of the entire intermediate layer frame 16 during construction, and after completion, the lower layer 16a below the floor F on which the jack mechanism 22 is installed is completed. What is necessary is just to design so that it can support the said load. In addition, comparing the work in progress and after the work is completed, the load to be supported is drastically reduced, and the remaining stress is greatly reduced, so that the design can be simplified. Moreover, at least a part of the strength against the stress caused by the horizontal movement and the vertical movement of the earthquake can be secured by the reduced stress, so that the frame structure of the building 10 can be made economical also from this point. Moreover, the jack mechanisms 22, 22,...
When jacking up the column member 17a, the column member 17
a, 17'a is set in advance so that the spacing δ 'after jack-down becomes the root gap of welding, so that the welding work of the column members 17a, 17'a can be performed easily and reliably. Can be done. In the above embodiment , the floor F on which the jack mechanism 22 is installed is not limited.
For example, the lowest floor of the intermediate layer frame 16, that is, the reference layer frame 1
3 or another floor such as the top floor of the intermediate building 16. For example, jack mechanism 2
In the case where the floor F on which the second floor 2 is installed is the lowest floor of the intermediate layer frame 16, the load supported by the reference layer frame 16 was all loads above the reference layer frame 16 at the time of jacking up. After the jack-down, the load is drastically reduced only to the load of the reference layer frame 16 itself. Then, even if the load due to the finishing material, the stress due to the load of the equipment loaded on the standard floor, and the stress due to the horizontal and vertical movements of itself are combined, most or all of them are covered by the reduced load capacity. It is also possible to design very easily. In the above embodiment , the reference layer frame 1
3. The uppermost frame 15 is configured to have a height of, for example, two floors. However, if a truss structure is used, it is needless to say that the height is one floor or three or more floors. Needless to say, the configuration may be provided. The mega pillar 11 of the building 10 to be constructed,
Are arranged at regular intervals on both sides of the building 10, but the arrangement is not limited. For example, a configuration in which these are arranged only at the four corners, a configuration in which the entire both side surfaces of the building 10 are configured as mega columns, and a configuration in which mega columns are disposed at appropriate intervals over the entire outer peripheral portion may be employed. Good. In addition, although the tube-shaped mega pillar 11 having a rectangular cross section is made of a reinforced concrete structure, it may be made of a steel reinforced concrete structure, a steel tube structure, a filled steel tube concrete structure, or the like, or a steel frame formed in a tube shape. A three-dimensional truss structure or the like may be used. Further, when the reference layer frame 13 is located above a certain dimension,
That is, as long as the floor is located in the air, the set floor number is not limited. Further, not only when the building 10 has a basement floor, for example,
Even in a case where a reference floor is located at the fifth floor above the ground in a building having a three-story portion from the first floor, the above-described construction method can be similarly applied, and the same effects as above can be obtained. Furthermore, the execution timing of the floor concrete or the PC slab plate to be cast on each floor may be appropriately determined in consideration of the balance of the load to be supported by the reference layer frame 13 during and after the construction. As described above, according to the method for constructing a frame structure according to the first aspect, the reference layer skeleton and the uppermost layer skeleton are joined to the core pillar, and the reference layer skeleton is interposed between the core columns. After supporting the load of the lower layer of the layered structure and supporting the load of the upper layer of the intermediate layered structure with the uppermost layered structure, the upper layer and the lower layer of the intermediate layered structure are finally joined. , Special
Then, the lower column member and the upper column member of the intermediate layer frame are connected to each other.
It is a predetermined size with a jack interposed between them without joining
Separate the upper part of the intermediate layer structure into the uppermost layer structure.
After joining, jack down the upper part, and both pillars
The gap between the materials is the root gap for welding them.
So that the column members are
It was configured to be welded and joined. As a result, not only during construction but also after the upper and lower layers of the intermediate structure are joined, the load of the lower layer of the intermediate structure is supported by the reference structure and the load of the upper structure is minimized. The state supported by the upper frame can be maintained. In this way, the load of the intermediate layer skeleton is shared and supported by the reference layer skeleton of the truss structure and the uppermost layer skeleton, respectively, so that the cross-sectional dimensions of each member constituting the reference layer skeleton can be particularly reduced. And this can be economical. In addition, when the construction is completed and after completion, the load to be supported is drastically reduced, and the remaining stress is greatly reduced, so that the design can be simplified. In addition, at least a part of the strength against the stress caused by the horizontal and vertical motions of the earthquake can be secured by the reduced stress, so that the frame structure of the frame structure can be made economical from this point as well.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing an example of a building constructed by applying a method of constructing a frame structure according to the present invention, wherein (a) is a front view,
(B) It is a side view. FIG. 2 is a view showing an embodiment of a method for constructing a frame structure according to the present invention, and is a front view showing a building being constructed by applying the construction method. FIG. 3 is a front view showing a main part of the building. FIG. 4 is an elevation view showing an example of a building constructed by applying a conventional method of constructing a frame structure. [Description of Signs] 10 Building (frame structure) 11 Mega pillar (core pillar) 13 Reference layer frame 15 Top layer frame 16 Intermediate layer frame 16a, 16d, 16e Lower layers 16b, 16c, 16f Upper layers 17a, 17'a Column member 20 Mega structure (peripheral frame) 22 Jack

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-4-153460 (JP, A) JP-A-5-248009 (JP, A) JP-A-6-322827 (JP, A) JP-A-7- 26726 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) E04B 1/35 E04G 21/14

Claims (1)

(57) [Claims] [Claim 1] A core pillar erected on an outer peripheral portion, a reference truss structure of a truss structure provided a certain dimension above the ground surface, and a top truss structure of a truss structure A frame structure having a configuration in which an intermediate frame is provided between the reference layer frame and the uppermost frame of the outer frame.
When constructing, the intermediate layer skeleton is divided into an upper layer and a lower layer, and the reference layer skeleton and the uppermost layer skeleton are joined to the core pillars at predetermined heights, respectively, and the reference layer The frame supports the lower layer load of the intermediate layer frame, and the uppermost layer frame supports the upper layer load of the intermediate layer frame. Thereafter, the upper layer and the lower layer of the intermediate layer frame are It is a construction method of a frame structure having a configuration to be joined, at the time when the core column is first constructed to a predetermined height, after constructing a reference layer frame at a predetermined height, and constructing a core column, will conduct and erection of the intermediate layer precursor to the reference layer precursor on, after erection of the lower portion of the intermediate layer skeleton, on the intermediate layer precursor
When constructing the layer, the lower column member and the upper column member
Without connecting the material and jacks between them
Are separated by a predetermined dimension in the vertical direction, and after the construction up to the top floor of the intermediate building is completed, the top building is constructed and the top building and the middle building are constructed. After joining with the upper layer , the jack is operated to jack the upper layer of the intermediate layer frame.
By going down, the upper column member and the lower column member
The distance between the material and the root
So that the column members
A method of constructing a framed structure, characterized by welding and joining .