KR102332393B1 - The tuned liquid damper for mixed-use apartment building - Google Patents

Abstract

The present invention relates to a synchronized liquid damper for a mixed-use building, in which a water tank and a unit part containing a liquid accommodated in the water tank are provided, and the unit part is a middle part of a building made of a wall-type upper structure and a ramen frame-type building. , Multiple layers are included in the transition floor to the lower level, enabling reduction in the number of members and their own weight, and also enables vibration absorption and control in the transition floor section, thereby ensuring the stability of the building through efficient control. .

Description

The tuned liquid damper for mixed-use apartment building

The present invention relates to a synchronized liquid damper for a mixed-use building, and more particularly, to the surplus space of a transition structure of a transition beam or transition slab formed between a structure of a high-rise part of a wall structure and a structure of a structure of a low-rise part of a column structure. It relates to a synchronized liquid damper of a residential/commercial complex that is installed and reduces vibration of a building using the sway of liquid and enables reduction of the number of members and its own weight.

In general, in the construction of high-rise buildings, usability for the convenience of residents and securing the safety of structures should be prioritized against irregular dynamic loads such as earthquakes and winds. These control devices absorb vibration energy transferred to the building from external loads and dissipate energy in various forms. There are Viscous Damper using the viscosity of liquid, Friction Damper using friction of materials, and a synchronous mass damper using installed mass and rigidity. (Tuned Mass Damper; TMD) and Tuned Liquid Damper (TLD) using the kinetic energy of the liquid inside the tank. Among them, the Synchronized Mass Damper (TMD) adjusts the stiffness of the spring to synchronize it with the cycle of the structure and requires additional equipment, but the Synchronized Liquid Damper (TLD) controls the level of the liquid inside the tank to reduce the vibration of the building through swaying. It is easy to install and maintain by reducing it.

Among high-rise buildings, residential and commercial complex buildings have the characteristics of residential space in the upper part and commercial space in the middle and lower floors depending on the purpose of the building. Accordingly, the upper part is designed as a wall structure and the lower part is a ramen frame structure, so the structural properties of the upper and lower parts are different. A transfer layer structure using a transfer plate is installed.

In order to block the vibration of the residential-commercial complex as described above, in Republic of Korea Patent Registration No. 10-1323588, as a transition layer installed between the upper shear wall structure and the lower ramen structure of the residential-residential complex, it is constructed on the upper part of the lower ramen structure. Transition layer consisting of a lower transition layer and an upper transition layer constructed under the upper shear wall structure of the residential complex. Made of steel to restrict the horizontal movement of the lower and upper transition layers due to earthquakes or wind loads, the lower and upper transition layers, respectively Embedded steel embedded shear key is fixed to the vibration-proof pad installed between the lower and upper transition layers and the lower and upper transition layers to absorb vibrations inside the lower and upper transition layers, and absorbs vertical displacement to constrain the vertical load An integrated columnar composite transition layer structure for vibration isolation comprising a tensile restraining material has been published.

However, in the prior art, stress is concentrated in the transition layer due to the abrupt difference in stiffness in the transition layer where the wall and the transition beam meet in the upper wall type and the lower frame type and the discontinuity of the structural system, and the flow of this stress concentration and load transfer is the overall behavior of the structure. Transition beams and transition slabs used in the transition layer are lowered by dominating the fracture mode, and the beams and slabs used in the transition layer are relatively deep compared to general buildings, so there is a limit that the transition structure must be designed as a whole. .

Republic of Korea Patent Registration No. 10-1323588 (2013.10.24)

As described above, a tuned liquid damper (TLD) is installed in the transition layer section installed between the upper shear wall structure and the lower ramen frame structure, such as a mixed-use building, to reduce lateral vibrations generated in the structure, thereby reducing the need for the transition part. An object of the present invention is to provide a synchronized liquid damper for a residential-commercial complex that ensures stability by reducing rigidity and enables reduction of the number of members and their own weight.

As a configuration for achieving the object, in the synchronized liquid damper of a residential-commercial complex having a water tank and a unit portion containing a liquid accommodated in the water tank, the unit portion is a building composed of a wall-type upper structure and a ramen frame type. It is a synchronized liquid damper of a mixed-use building, characterized in that a plurality of them are included in the transition layer to the middle and low-rise parts of the middle part.

As described above, the present invention reduces the number of members and their own weight by installing a tuning liquid damper (TLD) in the transition structure surplus space in the transition layer section installed between the high-rise structure of the wall-type structure and the ramen frame structure of the middle and low-rise section. It is possible to simultaneously enable the effect of securing the stability of the building through efficient control by enabling vibration absorption and control in the transition floor section.

1 is an elevation view of a three-story mixed-use building.
2 is a top view of a transition beam before a tuned liquid attenuator according to an embodiment of the present invention is installed;
3 is a plan view of a transition beam installed with a tuned liquid attenuator according to an embodiment of the present invention;
4 is an elevational view of a transition beam installed with a tuned liquid damper according to an embodiment of the present invention;
5 is a conceptual diagram of a tuned liquid attenuator according to an embodiment of the present invention.
6 is an equation using a tuned liquid attenuator design according to an embodiment of the present invention.
7 is a three-dimensional view of a three-story residential and commercial complex.
8 is an installation view of a tuned liquid attenuator according to an embodiment of the present invention.
9 is a comparison diagram of the layer shear force for the ground motion before and after the installation of the synchronized liquid damper according to an embodiment of the present invention.
10 is an elevation view of a mixed-use building in which a synchronized liquid damper is installed according to an embodiment of the present invention.

1 to 11 are diagrams and drawings illustrating a synchronized liquid damper of a residential/commercial complex according to an embodiment of the present invention. The detailed configuration of the present invention will be described with reference to this.

In the synchronized liquid damper of a residential-commercial complex having a water tank 11 and a unit portion 10 including a liquid 12 accommodated in the water tank, the unit portion 10 includes an upper structure composed of a wall type of the building and The middle and low-rise parts, which are middle and low-rise parts of a building made of a ramen frame type, include a plurality of them in the transition layer 21, and the unit part 10 is provided in the hollow part 31, which is an surplus space of the transition layer 21. characterized in that Through this configuration, the natural period of the building and the natural period of the unit unit 10 installed on the transition layer 21 are mismatched, and at the same time, the frictional force is maintained at a certain level or more, thereby efficiently coping with seismic force or vibration.

FIG. 2 is a view for explaining the concept of a transitional structure of a residential and commercial complex in which a synchronized liquid damper, which is the unit unit 10, is installed. As such, it can be seen as an inefficient configuration in which the hollow portion 31, which is an surplus space of the transition layer 21, is generated but not used.

The synchronized liquid damper of the mixed-use building of the present invention does not require a separate design for a space for installation or a new installation of the uppermost floor, but a hollow part 31 formed in the existing transition layer as shown in FIGS. 4 and 5 . is assumed to be used. Accordingly, the unit unit 10 according to an embodiment is easy to install in a building, and is easy to apply during design and construction in that it does not increase the floor height or the building height.

In detail, the design method for the unit part 10 installed in the hollow part 31 of the present invention is as follows.

과 고유진동수

은 그림과 같이 표현할 수 있다. 그림에서, n은 출렁임 모드,

은 n차모드의 물질량,

물의 출렁임 진동수

는 액채의 총 질량이다.

은 h/2a로 h는 물의 높이, 2a는 가진 방향으로의 액체의 길이를 뜻한다.

와 a는 유효질량과 진동수를 결정하는 데 가장 중요한 변수로 동일한

의 경우에도 a가 다르면 진동수가 달라진다.6 is a formula used for designing a tuned liquid damper applied to modeling, and the effective mass

and natural frequency

can be expressed as in the figure. In the figure, n is the sway mode,

is the amount of material in the nth mode,

oscillation frequency of water

is the total mass of the liquid.

is h/2a, where h is the height of the water and 2a is the length of the liquid in the excitation direction.

and a are the most important variables for determining the effective mass and frequency.

In the case of , if a is different, the frequency will be different.

로는 Fujino(1992) 가 제안한 식을 적용하였다. 여기서,

는 물의 점도이고 (

=0.01

/s), h는 수심,

는 h/2a, g는 중력가속도이다. 앞에서 유효 질량

과 고유진동수

, 감쇠비

통해 물탱크 내의 액체의 감쇠계수

및 강성

를 구하였다.damping ratio

For this, the equation proposed by Fujino (1992) was applied. here,

is the viscosity of water (

=0.01

/s), h is the depth,

is h/2a, g is the gravitational acceleration. effective mass in front

and natural frequency

, damping ratio

damping coefficient of the liquid in the water tank through

and stiffness

was saved.

＝4.664[rad/s], 감쇠비

는 = 1.155×1

, 감쇠계수

는 = 5.3011[N·s/mm], 강성

는 = 10700.515[N/mm], 그리고 댐퍼(물탱크)의 체적은 1.3*1.3*0.880[

]와 같이 가정하여 모델링을 진행했다.6, the natural frequency of the tuned liquid attenuator is

= 4.664 [rad/s], damping ratio

is = 1.155×1

, damping factor

is = 5.3011 [N s/mm], stiffness

= 10700.515 [N/mm], and the volume of the damper (water tank) is 1.3*1.3*0.880[

] was assumed and modeling was carried out.

For modeling, the mixed-use structure was assumed as a one-story frame (column) structure, a transitional layer, and a two- and three-layer wall structure as shown in FIG. 7 . Modeling of the transition layer was carried out assuming that it was thick.

Referring to FIG. 9 , it can be seen the effect according to the arrangement state when the unit unit 10 according to an embodiment is installed on the transitional floor of the residential-commercial building. 9(a) shows a case in which a synchronized liquid damper, which is the unit unit 10, is installed on the transition floor of the 3-story residential/commercial building A, and FIG. 13(b) is a building (a) for the same ground motion as above. ) represents the interlayer displacement.

9 (a') shows a case in which the unit part 10 is not installed in a three-story mixed-use building, and (b') shows the inter-floor displacement of the mixed-use building with respect to the ground motion in the above case.

In the above experiment, when the unit part 10 was not installed in the residential/commercial building, the displacement with respect to the ground motion of the highest part of the building was 90.5mm as shown in (b'), but the unit part 10 ), the displacement with respect to the ground motion of the highest part is 73.5mm as shown in (b).

In the above experiment, if the maximum displacement of each layer is arranged for each layer, the effect of reducing the first-floor frame from 63.20mm to 56.00mm, from the second-floor shear wall from 12.10mm to 7.40mm, and from the third-floor shear wall from 10.70mm to 6.40mm , and in the case of the third floor, which is the highest floor, a displacement reduction effect of 40.19% was shown.

In the above experiment, when the synchronized liquid damping device, which is the unit unit 10, is not installed, the total floor shear force of the mixed-use building is 308.99KN, but when the synchronized liquid damper is installed on the transition floor of the residential-residential complex, the floor shear force of the building is 284KN showed an 8% reduction effect.

Therefore, it can be seen that the vibration of the building due to the ground motion can be effectively reduced when the unit part 10 is installed in the transition part of the residential/commercial building compared to the case where it is not installed.

Although the present invention has been shown and described with reference to specific embodiments and applications, it is common knowledge in the art that various modifications and changes are possible without departing from the spirit and scope of the invention as defined by the appended claims. Anyone who has , can easily find out.

10. Unit part 11. Water tank
12. Liquid 21. Transition Layer
31. Hollow part 41. Wall structure
51. Frame structure

Claims (2)

In the synchronized liquid damper of a residential/commercial building,
The unit unit 10 has a structure including a water tank 11 and a liquid 12 accommodated in the water tank, and the unit unit 10 is an upper structure composed of a wall type of a building and a middle part of a building composed of a ramen frame type. Synchronized liquid damper of a mixed-use building, characterized in that a plurality of them are included in the hollow part 31, which is the surplus space of the transition layer 21 to the middle and low-rise parts.
delete

Images