JPH03183875A - Building construction - Google Patents

Abstract

PURPOSE:To reduce horizontal and vertical response in the event of an earthquake by hanging and bearing a suspended structural body on a suspension member suspended from a main structural body, fixing the lower end of the suspension member to a floor of the lower layer of the suspended structural body, and making it possible to vibrate the suspended structural body. CONSTITUTION:A suspended structural body S2 constituted of floorss separated from a construction and a bearing column 5 is hung and born on a suspension member 1 suspended from a main structural body S1. After that, the upper end of the suspension member 1 is fixed to a bearing beam 2 of the hollow section of a column C, and a bearing plate 8, base isolation element 7 and anchoring plate 3 are fixed with a nut 4. Then, the suspension member 1 is penetrated in the vertical direction a plurality of the floorss, and the lower end thereof is fixed to the floorss of the lowest floor. The structural body S2 is separated from the main structural body S1 at a clearance in the horizontal direction. According to the constitution, the suspended structural body is vibrated with a fixed point of the lower end of the suspension member as an intersecting point, and a natural period can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) This invention relates to a building structure that suppresses horizontal and vertical vibrations during disturbances such as wind and earthquakes.

(Prior art and the problem to be solved by the invention) In order to suppress the vibration and shaking of structures caused by wind loads and earthquake forces and improve livability, seismic isolation devices such as laminated rubber are installed under structures. The seismic isolation construction method insulates the structure, the restraint construction method in which a vibrating body that resonates with the vibration is installed at the top of the structure, and uses this device to consume the vibration energy input to the structure, and the construction method in which the floor of the structure is A floor seismic isolation method is currently becoming popular, in which the bridge is supported separately from the floor of the bridge to block the transmission of vibrations from the main structure to the floor.

On the other hand, although there have been proposals for a long time to utilize the suspension method of suspending the floor from the structure for seismic isolation structures, it has not yet been put to practical use.

This construction method has the following advantages: the columns supporting the suspended floor are replaced with tension members, so the cross section of the members can be made smaller, and a large span of space can be obtained below the floor of the lowest floor of the suspended structure. It has structural and planning characteristics.

However, in this suspended structure, if the suspended floor is not completely separated from the main frame, the horizontal force acting on the structure will not be reduced and will be equal to or greater than that of a normal structure, and the cross section of the member will be It becomes quite large. Therefore, if the suspended floor is separated from the main frame, the horizontal force generated by the suspended floor will be reduced, and the horizontal force borne by the main frame will also be reduced.However, if multiple layers of suspended floors are simply suspended continuously, the higher mode Short-period vibrations are excited, and sufficient vibration isolation effect against seismic motion cannot be obtained.

Furthermore, the main bridge and the suspended floor vibrate separately when external forces are applied, but once the suspended floor begins to shake, it takes a relatively long time to come to rest, which is a problem unique to suspended structures. ing.

Furthermore, in response to vertical vibrations, the suspended floor is not separated from the main frame, so the response acceleration is the same as that of a normal structure.

This invention was made with a focus on the above-mentioned problems faced by suspended structures, and aims to propose a new structure that reduces horizontal and vertical responses during earthquakes and at the same time attenuates shaking at an early stage. It is something.

(Means for Solving the Problems) In the present invention, a hanging member is suspended from a main structure composed of columns, beams, walls, or foundations, or a combination of these, and suspends and supports a suspended structure. By positioning the support point for the structure downward and increasing the length of the pendulum when the hanging material vibrates, the natural period of the hanging structure can be made longer, and the natural period of the main structure, which has a relatively short period, can be made longer. Increasing the difference and making the entire suspended structure a single mass point system (rigid body)
By suspending the suspended structure so as to form a vibration mode such as , the response of the entire suspended structure is uniformly reduced, and the horizontal force borne by the main structure is reduced.

In addition, by interposing a member with low rigidity in the vertical direction such as a spring at the anchoring point of the hanging material to the main structure, the anchoring point to the hanging structure, or the intermediate point of the hanging material, it is possible to directional vibrations are suppressed from being transmitted to the suspended structure.

The suspension structure swings effectively in three directions: between the main structure and the suspension structure, between the foundation or the ground and the suspension structure, or inside the suspension structure, or at the anchoring point of the hanging material. Early damping is achieved by intervening a damping device.

If the pendulum length of the hanging material is not sufficient during vibration,
By interposing a member with low rigidity and deformability in the horizontal direction at the anchoring point of the hanging material, the period of the hanging structure is made longer.

(Example) The present invention will be described below based on drawings showing an example in which the main structure S1 is composed of columns C and beams G.

Architectural structure B of the present invention includes, for example, as shown in FIG. 1, a main structure S with a large cross section consisting of columns C and beams G, hanging members 1 that are suspended, and a floor S that is structurally separated from the main structure S. The suspension structure formed by suspending and supporting the suspension structure St consisting of the support columns 5 suppresses or damps the horizontal vibration of the suspension structure S2, and further reduces the vertical vibration of the suspension structure S2. It has a structure that insulates the

The example shows a double-core type building with cores on both sides, but as shown in Figures 1 and 2-■, the main structure SI has a hollow pillar C9C that constitutes the core and a hollow pillar C9C that forms the core. The suspension structure S2 is formed, for example, into a rigid frame shape from the connecting beam G, and the hanging structure S2 is structurally separated from the beam G and is supported in a suspended manner from the beam G.

Further, in this embodiment, the main structure S1 is constructed of a composite of columns C and beams G;

Depending on the scale of building structure B and the construction location, column C1 beam G,
Alternatively, each of the foundations F can be constructed independently.

FIG. 7 shows an embodiment in which the main structure S is constructed by the beam G alone, and the entire building structure B is constructed underground.

As shown in Fig. 1 and Fig. 3-■, the hanging material 1 is supported by the hollow part of the column C or the support beam 2 installed between the parallel beams G and G, and its upper end is fixed. The main structure S of l,
Become a fulcrum for.

As shown in FIG. 3, in this fixed part, a support plate 8 is installed on support beams 2, 2 installed at intervals,
A seismic isolation device 7 made of a coil spring or the like having low rigidity in the vertical direction is installed thereon, and a fixing plate 3 is further installed so as to sandwich the seismic isolation device 7.

and support plate 8. Seismic isolation device7. The hanging material 1 is fixed by passing the hanging material 1 through the fixing plate 3 and tightening a nut 4 from the threaded head thereof. At this time, the hanging member 1 is kept unrestricted by the clearance between the supporting beams 2, 2 spaced apart from each other.

This seismic isolation device 7 has a main structure S,
It has a structure that blocks vertical vibration of the hanging material 1, and may be installed at the anchoring point of the hanging material 1 to the hanging structure S2, or at the intermediate point of the hanging material 1.

On the other hand, hanging structure S! As shown in FIG. 1-2, it is separated from the main structure S with a clearance in the horizontal direction, and has a structure that vibrates separately from the main structure S.

As shown in Fig. 2-■, the hanging material 1 vertically penetrates multiple floors S of this hanging structure St, and its lower end is fixed to the floors S below the top floor, especially the floor S of the lowest floor. The suspension structure St is suspended and supported at the anchor point at the lower end.

The hanging structure S2 is also separated from the hanging material 1, and vibrates with respect to the hanging material 1 using the anchor point at the lower end as a fulcrum. The distance between the image fixing points at the upper end and the lower end of this hanging member 1 becomes the pendulum length when the hanging structure St vibrates.

The vibration period of the hanging structure S2 can be made longer as the pendulum length of the hanging material 1 is longer, that is, the lower the anchoring point of the hanging material 1 to the hanging structure S2 is set.

In general, when a structure has a disturbance with a period shorter than its natural period, the larger the difference in period, the greater the vibration isolation effect. Therefore, by making the period of the structure sufficiently long by increasing the length of the hanging members 1 as described above, it is possible to realize a structure with extremely small acceleration response to external disturbances such as earthquake motion.

Figure 2-■ is placed around the hanging material between each floor s and s.

As shown in FIG. 4, a cylindrical support column 5 is installed with a clearance from the hanging material l, and while the load of the floor S above it is borne by the support column 5, the vertical load of the suspension structure S2 is is supported at the anchor point at the lower end of the hanging material 1.

As shown in FIG. 4, the lower end of the hanging member 1 is fixed by placing a support plate 8 under the floor S in the same way as the upper end, and tightening the nut 4 from below the hanging member 1.

In addition, if the number of floors of the hanging structure S2 is small and the distance between the image fixing points at the upper and lower ends of the hanging member 1, that is, the length of the pendulum, cannot be maintained sufficiently, the hanging member should be 1
In order to allow the upper end fixing section to slide with respect to the support beam 2 without resistance, a sliding support 6 having a small coefficient of friction with the support beam 2 is placed under the support plate 8, and a sliding support 6 with low rigidity in the horizontal direction is placed below the support plate 8. By connecting a horizontal movable device 6w having deformability, such as a spring, the natural period of the hanging structure S2, that is, the period of the pendulum, can be made longer.

This structure can also be applied to the fixing part at the lower end of the hanging member 1, as shown in FIG.

Further, a damping device 9 is connected between the main structure SI and the suspension structure 52, as shown in FIG.

The damping device W9 is, for example, a damper made of an elastoplastic material such as high damping rubber or a viscous material, which operates effectively in each of three directions, horizontal and vertical. It exerts an energy absorption ability against the relative movement of S2, and quickly stops the vibration of the hanging structure S2.

In addition to the damping device 9 between the hanging structure S2 and the main structure S1,
It may be installed between the hanging structure St and the foundation F or the ground.

FIG. 6 shows an embodiment of the structure of the invention as claimed in claim 6, in which the main structure S as shown in FIGS.
This is a case where a new building structure B is constructed by stacking a plurality of independent building structures B each consisting of a hanging structure S1 and a hanging structure S2 in a plurality of stages in the vertical direction.

In this case, hanging members 1 and 1 of building structure B are independent of each other.
are separated from each other, and each building structure B is separated from the first
It is constructed with the structure of any one of the inventions recited in claims to claims 5.

(Effects of the Invention) The present invention is as described above, and has a structure in which the anchoring point at the lower end of the hanging material that supports the hanging structure is set downward, and the hanging structure is vibrated using this anchoring point as a fulcrum. Since the natural period of the structure is made longer, the horizontal force generated in the suspended floor part is reduced, and the response of the main structure and suspended structure to vibration can be effectively suppressed. .

In addition, vertical vibration of the suspended structure is suppressed by interposing a seismic isolation device that operates vertically at the anchor point position of the suspended material or at an intermediate point, and furthermore, the vertical vibration of the suspended structure is suppressed, and The vibrations in three directions are quickly attenuated by the damping device connected between the hanging structure and the hanging structure, or inside the hanging structure, or at the anchor point of the hanging material.
The livability of the suspended structure can be improved.

Furthermore, even if the hanging structure is low-rise and the pendulum length is not sufficient, the hanging structure can be improved by using a sliding support for the hanging material anchorage and at the same time interposing a member with low horizontal rigidity and deformability. Since the natural period of the body can be made longer, it can be applied to all types of buildings, including low-rise, medium-rise, and high-rise buildings.

[Brief explanation of drawings]

Fig. 1-1 and U are plan views of an upper layer portion and a middle portion, respectively, showing an embodiment of the present invention, and Fig. 2-■. ■ is a cross-sectional view taken along the X-X line and Y-Y line in Figure 1-■, respectively;
Figures 3-1 and II are an elevational view and a plan view showing the anchoring part at the upper end of the hanging material, respectively. Figure 4 is an elevational view showing the anchoring part at the lower end of the hanging material, and Figure 5-■■ 6-I and II are elevational views of the hanging material fixing portion showing an embodiment of the invention described in the fourth claim, and FIGS.
Cross-sectional views in two directions showing an embodiment of the claimed invention, No. 7
The figure is a sectional view showing an embodiment of the present invention constructed as an underground structure. B... Building structure, S... Main structure, St... Hanging structure, C... Column, G
...Beam, S...Floor, 1...Hanging material, 2...Support beam, 3...Fixing plate, 4... ...Natsuto, 5...Support pillar, 6
...Sliding support, 6" ... Horizontal movable device, 7 ... Seismic isolation device, 8 ... Support plate, 9 ... Damping device, F...Basic. Fig. 5■ Fig.■

Claims (6)

[Claims] (1) A suspended structure separated from the main structure is suspended and supported by a hanging material that is suspended from the main structure composed of columns, beams, walls, or foundations, or a combination of these. An architectural structure characterized in that the lower end of the hanging material is fixed to a floor below the top floor of the hanging structure, and the hanging structure can freely vibrate with respect to the main structure. (2) Another hanging material is suspended below the hanging structure to which the hanging material is fixed, and this hanging material suspends and supports another hanging structure separated from the main structure. Architectural structure according to claim 1. (3) The first claim characterized in that a member with low rigidity is interposed in the vertical direction at the anchoring point of the hanging material to the main structure, the anchoring point to the hanging structure, or the intermediate point of the hanging material. section,
Or an architectural structure as described in claim 2. (4) The architectural structure according to any one of claims 1 to 3, wherein a member having low rigidity and deformability in the horizontal direction is interposed at the anchoring point of the hanging material. (5) A damping device is interposed between the main structure and the suspended structure, between the foundation or the ground and the suspended structure, inside the suspended structure, or at the anchoring point of the suspended structure. Architectural structures according to claims 1 to 4. (6) An architectural structure characterized in that it is constructed by vertically stacking two or more of the architectural structures according to claims 1 to 5.