JP2000282711A - Damping structure of tower-like building - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent destruction and collapse of a reinforced concrete tower-like building due to rolling. SOLUTION: By filling a large number of energy absorbing members in the axial concrete of a reinforced concrete tower-like building, even if there is bending deformation due to rolling, the energy absorbing members can be deformed before destruction or collapse. Thus, a structure was adopted in which energy was absorbed in the axial direction of the tower body.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tower structure, and more particularly to a vibration control structure in a reinforced concrete tower structure.

[0002]

2. Description of the Related Art Some conventional buildings use low yield point steel, but they are used between columns such as columns and slabs or columns or beams. Therefore, the low-yield-point steel has an effect on the shear deformation caused by the roll of the building, and controls the shake of the whole building. In particular, it has been considered that it is difficult to incorporate an energy absorbing mechanism into a tower-shaped structure made of reinforced concrete.

[0003]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem. In a reinforced concrete structure having a weak bending deformation, particularly, a tensile strength, the vibration can be absorbed in the vertical axis direction. By doing so, we will prevent the collapse of buildings.

[0004]

DISCLOSURE OF THE INVENTION The present invention has been made in view of the above-mentioned object, and its gist is to provide a reinforced concrete tower-like building with a large number of vibration energy absorptions in the concrete of the building. There is provided a vibration damping structure in a tower-like structure in which members are formed by being filled in an axial direction so as to suppress bending deformation caused by a lateral swing of the tower-like structure.

Here, the reinforced concrete tower-like building includes an observation tower, a water tank, legs such as an expressway and a bridge, telephone poles, various turrets, a chimney, and the like with respect to the width of the PC structure. (Axial direction).

Here, the vibration energy absorbing member is not only a rod-shaped member made of a metal having a low yield point such as aluminum or lead, but also a synthetic resin having elasticity such as acrylic or rubber, silicone oil or high-viscosity oil. Viscous materials such as asphalt (bituminous materials) and other viscoelastic general-purpose materials having construction and the like are considered. All of these can be obtained at relatively low cost.

Since aluminum and lead have a high melting point, they cannot be poured directly into the voids of reinforced concrete due to the occurrence of cracks in the concrete. You can also.

[0008] For the above-mentioned high melting point, a melt is poured into a steel pipe with a bottom, such as a corrugated steel pipe, and is hardened into a bar shape. It is also possible to form a void with a mold or the like at the time of installation and insert the rod into the void, and then fill the gap in the void between the concrete and the rod with mortar.

[0009] Regardless of whether the arrangement in the reinforced concrete is solid or hollow, it is installed in consideration of the arrangement of the reinforcing bars. Of course, it is possible to control the bending deformation due to the rolling of the tower-like building regardless of whether it is continuous or intermittent in the height direction (axial direction) of the tower.

[0010] Between the low yield point member and concrete,
It is necessary to obtain sufficient adhesive force (fixation) in order to make the tower edge (surface) particularly effective in the compressive and tensile directions due to the bending deformation of the roll. It is preferable to provide unevenness or projections.

[0011]

According to the present invention, in the event of a large tower swaying due to an earthquake, tension and compression stresses are applied to the energy absorbing members arranged in the axial direction together with the tower. Before the reinforced concrete of the tower body is destroyed due to compression and deformation, the vibration energy absorbing member is deformed, thereby reducing the bending deformation in the axial direction of the entire tower (vibration damping). Prevent collapse.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments.

[0013]

Embodiment 1 FIG. 1 is a schematic view of a reinforced concrete tower-like building on the ground surface, and is a conceptual diagram showing a rolling state.
FIG. 2 is an explanatory view showing a method of manufacturing a plurality of lead bars buried at predetermined intervals in FIG. 1, FIG. 3 is a partial vertical sectional view of a tower thickness in which the lead bars of FIG. 2 are buried in concrete, FIG. 4 is a cross-sectional view showing a state in which a vibration energy absorbing member is disposed in a part of a RC tower of a hollow tower, and FIG. 5 is a partial longitudinal section of a tower buried in a reinforcing bar of another embodiment different from FIG. FIG. 6 shows the relationship between stress σ and deformation ε, in which lead is steel SS400.
It is a graph which shows that a yield point is lower than steel and steel PC bar.

FIG. 2 is an explanatory view in which aluminum melted in a furnace or the like is injected into a corrugated steel pipe 4 serving as a mold from an injection port 3. When the RC frame 5 of the building 1 is made, concrete is poured into the built frame together with a reinforcing bar (not shown) in a frame (not shown) for forming the frame, and the lead bar 6 is placed in the concrete. Buried (Fig. 3).

The reason why the outer periphery of the lead bar 6 is formed into a wavy shape is to increase the adhesion (fixation) to the concrete so as to be integrated with the deformation of the concrete during an earthquake or the like. FIG. 4 is a cross-sectional view showing that FIG. 3 is arranged at a predetermined position in a hollow tower. In addition, the length of the lead bar in the RC frame 5 in the direction of the tower axis is not determined, but the length is preferably the same as the reinforcing bar.

FIG. 5 does not necessarily have to be the deformed lead bar shown in FIG.
When casting concrete in a formwork (not shown), many voids are provided by an inner formwork (not shown), and a lead rod 6 is inserted into the void. Stick 6
It is conceivable that mortar is injected into the gap between the lead rod 6 and the RC body 5. The inner mold may be removed before the mortar is injected, or may be buried as it is.

[0017]

Embodiment 2 FIG. 7 is an explanatory view showing a method of manufacturing a large number of aluminum bars buried at predetermined intervals in FIG.
FIG. 9 is a partial vertical sectional view of the tower thickness in which the aluminum rod of FIG. 7 is embedded in concrete, and FIG. 9 is a partial vertical sectional view of the tower thickness in which the aluminum rod of FIG. The aluminum rod 10 in the RC skeleton 5 in FIG. 8 is disposed in the same manner as in FIG. 4 in which a lead rod is embedded.

FIG. 7 is an explanatory view in which aluminum melted in a furnace or the like is injected into the corrugated steel pipe 9 from the injection port 8. The corrugated lead bar 6 thus produced is connected to the tower-like building 1.
In order to embed the aluminum rod 10 in the concrete, a concrete bar (not shown) is built together with a reinforcing bar (not shown) in a form (not shown) for making reinforced concrete, and concrete is poured into the form. Bury (Fig. 8).

The outer periphery of the aluminum rod 10 is corrugated (irregular shape)
The reason for this is that the adhesion (consolidation) with concrete is increased so that the deformation during an earthquake is integrated with concrete. The length of the aluminum rods 10 can be set at the same length as the reinforcing bars arranged in the height direction (axial direction) of the tower at regular intervals as shown in FIG. It is convenient.

FIG. 9 is not the one having the deformed shape shown in FIGS. 3 and 5 (if the deformed shape is used, it is possible to integrally move against the sway by increasing the fixing force with the concrete). As a method of embedding in the RC frame, a number of voids are provided in the RC frame by arranging an inner frame (not shown) in the form when concrete is poured into the frame. It is conceivable that after inserting the aluminum rod 10 into the void, mortar is injected into a gap between the RC skeleton 5 and the aluminum rod 10 to integrate the aluminum rod 10 with the RC skeleton 5. The inner mold may be removed before mortar injection or may be buried as it is.

[0021]

Embodiment 3 FIG. 10 is an explanatory view showing a method of manufacturing a rod-shaped viscous body which is buried in a large number at predetermined intervals in FIG. 1, and FIG. 11 is a tower thickness in which the viscous body of FIG. 10 is buried in concrete. And FIG. 12 is a partial longitudinal sectional view of a tower thickness buried in a reinforcing bar and showing another embodiment different from FIG.

FIG. 10 shows that a rod-shaped corrugated viscous body 14 is obtained by injecting a material for an energy absorbing member which is in a liquid state at room temperature, such as silicone oil, from an inlet 12 into a corrugated steel pipe 13 as a mold. Instead, a viscoelastic body such as an acrylic thermoplastic resin or asphalt may be used.
The rod-shaped viscous body 14 is disposed together with a reinforcing bar (not shown) in a frame for a frame (not shown) when the RC frame 5 of the tower-like building 1 is formed, and is placed in the frame. Concrete is cast and the stick-shaped viscous material 14 is buried in the concrete (FIG. 11).

Separately from this, in the case of a Shincon oil or the like in which a viscous material as an energy absorbing member flows even at room temperature, when casting concrete for an RC skeleton, a large number of viscous materials are formed by an inner mold (not shown). The above-mentioned voids may be provided, and the low-temperature viscous liquid material may be directly injected into each void and filled (FIG. 12). Here, the reason that the solution of the viscous body is limited to a relatively low temperature such as room temperature is
This is because when the high-temperature liquid material of the above-mentioned lead, aluminum, or thermoplastic synthetic resin is poured into concrete, adverse effects on the frame such as cracks are avoided.

As shown in FIGS. 5 and 9, the viscous body 14 previously produced in a factory or the like in FIG. 10 is inserted into the above-described void, and the viscous body 14 is injected into the gap of the RC frame 5 by mortar. Then, it can be integrated with the RC skeleton 5.

As shown in FIG. 4, the viscous body 14 is disposed on a plane at a predetermined interval in the RC frame and is filled in the frame. The length of the tower in the axial direction is substantially the same as the tower length. A rod-shaped thing may be used, but since the tower body is to be connected from the lower part to the upper part, it is sufficient that the tower body has the same length as the joint.
Those using voids continue into the upper and lower RC frames.

[0026]

According to the reinforced concrete tower-like structure of the present invention, since the energy absorbing member is installed in the inner axial direction of the concrete, when the tower body rolls, the tower bends and the edge is bent. Tension and compression occur. For example, FIG.
Even if a compressive force is applied to one side of the tower and a tensile stress acts on the opposite side of the tower, before the reinforced concrete of the entire tower breaks, the rod-like viscous material such as a lead rod, aluminum rod, etc. Even if the energy absorbing member of the body is deformed and continues to sway, the energy is absorbed in the axial direction of the tower along the energy absorbing member, and the tower body does not shake significantly, so that it can be prevented from collapsing.

Further, by forming irregularities such as irregular shapes on the surface of the energy absorbing member, the adhesive force with concrete is increased, and the energy absorbing member is prevented from separating from the concrete at the time of rolling, thereby stabilizing the tower body. The obtained damping is obtained.

Furthermore, by using waste materials such as aluminum rods as the energy absorbing member, it is possible to obtain a vibration control structure in a tower-like building at lower cost.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram illustrating a deformed state in a tower-like building of the present invention.

FIG. 2 is an explanatory diagram for manufacturing a lead bar used in the present invention.

FIG. 3 is a partial longitudinal sectional view showing a state where the lead bar of FIG. 2 is buried in an RC frame of a tower-like building.

FIG. 4 is a partial cross-sectional view in which a lead rod is provided in a hollow tower body.

FIG. 5 is a partial vertical cross-sectional view showing a state in which a void provided in an RC frame is filled with a lead rod and mortar.

FIG. 6 is a graph showing that a lead bar is a member having a lower yield point than a PC steel bar or a steel material of SS400.

FIG. 7 is an explanatory diagram for manufacturing an aluminum rod as an energy absorbing member different from FIG. 2;

FIG. 8 shows the aluminum rod of FIG.
FIG. 4 is a partial vertical cross-sectional view of a state in which the terminal is buried in a C frame.

9 is a partial longitudinal sectional view in which an aluminum bar is used instead of the lead bar of FIG.

FIG. 10 is an explanatory view for producing a rod-shaped viscous body as another energy absorbing member different from FIG. 2;

FIG. 11 is a partial longitudinal sectional view showing a state in which the viscous body made in FIG. 10 is buried in an RC skeleton of a tower-like building.

FIG. 12 is a partial longitudinal sectional view showing a state in which a viscous material of a fluid is injected and filled at room temperature into a void provided in an RC skeleton.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Tower-like building 5 RC frame 6 Lead bar (energy absorption member) 7,11 Mortar 10 Aluminum rod (energy absorption member) 14 Viscous material (energy absorption member)

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Claims (4)

[Claims] In a reinforced concrete tower-like building, a large number of vibration energy absorbing members are axially filled in concrete of the building to form a tower-like building. I tried to dampen,
Damping structure in tower-like buildings. 2. The reinforced concrete formed by filling the plurality of vibration energy absorbing members in the axial direction is formed by filling a plurality of voids provided at a predetermined interval in the axial direction of the reinforced concrete with a viscous material. Item 2. A vibration damping structure for a tower-like building according to item 1. 3. A structure in which the plurality of vibration energy absorbing members are formed by filling the plurality of vibration energy absorbing members in an axial direction, wherein a lead rod is inserted into a plurality of voids provided at predetermined intervals in the axial direction of the reinforced concrete, and The damping structure of a tower-like building according to claim 1, wherein a mortar is filled in a gap between the reinforced concrete. 4. A method in which the plurality of vibration energy absorbing members are formed by filling the plurality of vibration energy absorbing members in the axial direction, wherein an aluminum rod is inserted into a plurality of voids provided at predetermined intervals in the axial direction of the reinforced concrete, and The damping structure of a tower-like building according to claim 1, wherein a mortar is filled in a gap between the reinforced concrete.