JPH0415877Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] This invention relates to a floor structure having a seismic isolation floor and slab that has a seismic isolation function and is used in buildings such as computer centers.

[Conventional technology]

In general, in buildings such as computer centers, many electrical cables are routed on the floor, so another floor is placed above the building slab to create a double floor structure. It has a structure. In addition, in order to protect precision machinery such as computers from vibrations caused by earthquakes, measures are taken such as providing seismic resistance or seismic isolation functions to the upper floor legs.

One such floor structure is one in which a seismic isolation floor is placed on top of a slab, as shown in Figure 3.

In FIG. 3, reference numeral 1 indicates a slab. Slab 1 is not a flat plate, but is a slab with wavy ribs 2, 2, etc. at the bottom as shown in the figure, and was constructed without using any floor support for formwork construction or gantry for support. has been done. Furthermore, the slab will be explained using FIG. In the slab 1, truss-shaped reinforcing bars 3, 3, ... are arranged at regular intervals, and bottom plates 5, 5, ... are bolted to the bottom of the truss-shaped reinforcing bars 3, 3, ... via spacers 4, 4, ... 6, 6, . . . , frame bodies 7, 7, . . . are arranged between the mutually adjacent bottom plates 5, 5, . After placing the welded wire mesh 8 and pouring concrete 9 into the frames 7, 7, . . . and hardening the concrete 9, the bottom plates 5, 5, . . . and the frames 7, 7, . It has been removed.

As shown in FIG. 3, a seismic isolation floor 10 is provided above the slab 1. The seismic isolation floor 10 is the floor part 11
A structure is known that is composed of a base plate and leg parts 12, 12, . . . having a seismic isolation function.

[The problem that the idea attempts to solve]

However, in the above-mentioned conventional floor structure with a seismic isolation floor and a slab, the upper surface of the slab is flat and the legs of the seismic isolation floor have a seismic isolation function, so the legs are long. Because of this, this double structure floor had the disadvantage that the height from the bottom of the slab to the top of the seismic isolation floor was high, increasing the floor height of the building.

In other words, when building a double floor structure with a seismic isolation function using springs or the like, in addition to the weight of the seismic isolation floor itself placed on top of the slab, there is also the weight of the objects placed on the seismic isolation floor. In order to support large amounts of weight and absorb lateral vibrations, it is necessary to equip springs with large diameters and lengths from a safety design perspective, and as a result, the length of the legs inevitably increases. However, there is a problem in that the upper surface of the seismic isolation floor becomes high.

This idea was made in view of the above circumstances, and its purpose is to reduce the height from the bottom of the slab to the top of the seismic isolation floor, thereby reducing the floor height of the building.

[Means to solve the problem]

The floor structure with a seismic isolation floor and slab based on this idea consists of a seismic isolation floor with legs with a seismic isolation function on the lower surface, and a slab with grooves that loosely fit into the legs of the seismic isolation floor. The seismic isolation floor includes a plurality of cross beams and a floor panel fixed above the cross beams via a support member, and the leg portion is located in the groove and extends horizontally. a base part having an elastic member that absorbs the shaking of the cross beam; and a base part disposed between the base part and the floor panel, the upper end of which is located above the lower surface of the cross beam, and The connecting member includes a cylindrical body fixed to the cross beam, and an elastic member disposed within the cylinder to form a space between the cross beam and the slab by its own elastic force, and the connecting member includes: The slab is composed of a disc body horizontally fixed to the upper end of the cylindrical body, and a frame body suspended downward from the disc body and fixed to the cross beam.
The device is characterized in that it includes a horizontal floor portion, and a rib portion and a recessed portion whose bottom surfaces protrude below the horizontal floor portion, and the recessed groove is formed by the upper surface of the recessed portion.

〔Example〕

This invention will be described below with reference to embodiments shown in the drawings.

In FIG. 1, reference numeral 15 is a slab. The slab 15 is formed from a horizontal floor part 16, a rib part 17 protruding from the lower part of the horizontal floor part 16, and a recess part 18 provided in parallel with the rib part 17. The recess 18 consists of a groove floor 18a and groove walls 18b, 18b on both sides of the groove floor 18a. The bottom surface of the groove floor portion 18a is at the same height as the bottom surface of the rib portion 17, and the groove wall portions 18b, 18b are integrated with the horizontal floor portion 16 at their upper ends.

Moreover, the upper surface of the groove floor part 18a, the groove wall part 18b,
The inner surface of 18b forms a groove 18c. Seismic isolation floors 19, 19, . It consists of leg parts 21, 21 having.

The seismic isolation floor 19 will be explained in more detail using FIG. 2. The floor section 20 consists of a floor panel 22, a cross beam 23, and support members 24, 24, . . . , and the floor panel 22 is fixed above the cross beam 23 by the support members 24, 24. The leg portion 21 is connected to the groove floor portion 18
The main components are a base part 25 placed on the top of a, a spring (elastic member) 26 fixed to the top, and a disc body 27 placed on the top of the spring 26. . The disc body 27 is edged off from the base portion 25 by a spring 26 that absorbs vibrations in the vertical direction. A frame body 28 and a cylindrical body 29 having the same axis as the central axis of the disc body 27 are fixed to the lower surface of the disc body 27. The frame 28 connects the legs 21 to the floor 20
The cylindrical body 29 is a stopper that covers the periphery of the spring 26 and prevents the spring 26 from deforming more than necessary. Here, the disc body 27 and the frame body 28 are connected to the cross beam 23 and the cylindrical body 2.
It constitutes a connecting member that connects 9. Base 25
Springs (resilient members) 30, 30, . The leg portion 21 is formed in the groove 18c of the slab 15.
It is loosely fitted. In this way, by disposing the leg portion 21 in the groove 18c, there is a space between the leg portion 21, the groove floor portion 18a, and the groove wall portion 18b, and the floor portion 2
A space 31 for wiring electric cables and the like is formed between 0 and the horizontal floor 16.

Seismic isolation floor 19 and slab 15 configured in this way
In the floor structure having the floor part 20 and the slab 1
5 is divided into two vibration systems by the spring 26 of the leg portion 21. Therefore, the natural period of the floor 20 deviates significantly from that of the seismic wave, and even if an earthquake occurs and the slab 15 vibrates, only a small seismic force will be input to the floor 20.
Since the structure of the legs 21 of the seismic isolation floor 19 is a seismic isolation structure, the legs 21 have long legs. Because it is provided in 18c,
The position of the floor portion 20 can be lowered by the depth of the groove 18c.

Therefore, in the floor structure consisting of the seismic isolation floor 19 and the slab 15, it is possible to protect precision machines such as computers installed on the upper part of the seismic isolation floor 19 from vibrations caused by earthquakes, etc. It is possible to secure wiring space for electrical cables, etc., and to lower the floor height of the building.

[Effect of idea]

As described above, the floor structure having a seismic isolation floor and a slab according to this invention provides the following excellent effects.

In a so-called double floor structure in which a seismic isolation floor is provided on top of a slab, the slab structure is configured to include a horizontal floor portion, and rib portions and recesses whose bottom surfaces protrude below the horizontal floor portion, respectively. Since the concave grooves that loosely fit into the legs of the seismic isolation floor are formed by the upper surface of the concavity, the strength of the slab will not be reduced in any way compared to, for example, simply providing a concavity in a flat slab. The groove depth of the concave groove can be increased without causing any damage. Therefore, even if the length of the legs is inevitably long due to its structure, the upper surface position of the seismic isolation floor can be made sufficiently low.

In this case, the ribs have the function of a so-called beam that reinforces the entire slab, but the recesses can also have the same function as the ribs, and in this way, the recesses can be used together with the ribs. Since they also perform the function of beams, even if they are formed to protrude downward from the horizontal floor, the floor height of the building will not be increased thereby.

In addition, the legs with a seismic isolation function are placed between the base and the floor panel located in the groove, and the upper end of the leg is located above the bottom surface of the cross beam. Since the supporting cross beam is fixed, it is possible to ensure a sufficient length of the cylindrical body, that is, the length of the elastic member (spring) disposed within the cylindrical body. In other words, while ensuring the length of the cylindrical body that accommodates the elastic member is sufficient in terms of design,
The cross beam can be lowered below the upper end of the cylindrical body, and therefore, the upper surface position of the seismic isolation floor can be lowered from this point as well, and as a result, both the configuration of this leg part and the configuration of the recessed part can be lowered. As a result, the upper surface position of the seismic isolation floor can be further lowered, and the floor height of the building can be lowered, thereby reducing costs.

[Brief explanation of drawings]

Figure 1 is a perspective view showing an embodiment of this invention;
The figure is a side view of the main part of a seismic isolation floor, FIG. 3 is a perspective view showing a conventional floor structure having a seismic isolation floor and a slab, and FIG. 4 is a detailed sectional view of a conventional slab. 15...Slab, 16...Horizontal floor section, 17...
Rib portion, 18... Concave portion, 18c... Concave groove, 19...
... Seismic isolation floor, 21 ... Legs, 22 ... Floor panel, 2
3... Horizontal beam, 24... Supporting member, 25... Base part, 26, 30... Resilient member, 29... Cylindrical body, 3
1...Space part.

Claims (1)

[Scope of utility model registration request] The base isolation floor includes a base isolation floor having legs with a base isolation function on the lower surface, and a slab in which a groove is formed to fit loosely into the legs of the base isolation floor, and the base isolation floor has a plurality of horizontal beams and , a floor panel fixed above the cross beams via a support member, the leg portion having a base portion located in the groove and having an elastic member that absorbs horizontal shaking; a cylindrical body disposed between the base portion and the floor panel, the upper end of which is located above the lower surface of the cross beam, and fixed to the cross beam via a connecting member; and a resilient member for forming a space between the cross beam and the slab by its own resilient force, and the connecting member includes a disc body horizontally fixed to the upper end of the cylinder body; , and a frame that hangs downward from the disc body and is fixed to the cross beam, and the slab includes:
A seismic isolation floor and slab comprising a horizontal floor, and a rib and a recess whose bottom surface protrudes below the horizontal floor, and the groove is formed by the upper surface of the recess. Floor structure with.