CN111576495B - A seismic isolation system combining foundation and interlayer - Google Patents
A seismic isolation system combining foundation and interlayer Download PDFInfo
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- CN111576495B CN111576495B CN202010427676.4A CN202010427676A CN111576495B CN 111576495 B CN111576495 B CN 111576495B CN 202010427676 A CN202010427676 A CN 202010427676A CN 111576495 B CN111576495 B CN 111576495B
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- 238000002955 isolation Methods 0.000 title claims abstract description 159
- 239000011229 interlayer Substances 0.000 title claims abstract description 17
- 239000010410 layer Substances 0.000 claims abstract description 118
- 230000035939 shock Effects 0.000 claims abstract description 79
- 238000009413 insulation Methods 0.000 claims description 52
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 abstract description 5
- 238000004364 calculation method Methods 0.000 description 9
- 239000002689 soil Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000009933 burial Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000011150 reinforced concrete Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/08—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against transmission of vibrations or movements in the foundation soil
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/92—Protection against other undesired influences or dangers
- E04B1/98—Protection against other undesired influences or dangers against vibrations or shocks; against mechanical destruction, e.g. by air-raids
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H9/00—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate
- E04H9/02—Buildings, groups of buildings or shelters adapted to withstand or provide protection against abnormal external influences, e.g. war-like action, earthquake or extreme climate withstanding earthquake or sinking of ground
- E04H9/021—Bearing, supporting or connecting constructions specially adapted for such buildings
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- Environmental & Geological Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The invention discloses a shock isolation system combining a foundation and an interlayer. The vibration isolation system provided by the invention comprises a base vibration isolation layer and a layer vibration isolation layer, wherein the base vibration isolation layer is arranged on a base plate of a building, and the layer vibration isolation layer is arranged on the top of a floor with the same elevation as the base vibration isolation layer. The foundation vibration isolation support and the interval vibration isolation support are at the same elevation, so that the coordination and the synchronism of the deformation of the support are ensured, the foundation vibration isolation support is suitable for buildings of local basements and buildings with different basement layers, and a good vibration isolation effect can be realized.
Description
Technical Field
The invention relates to the technical field of building engineering shock insulation, in particular to a shock insulation system combining a foundation and an interlayer.
Background
The vibration isolation technology achieves the purpose of shock absorption by prolonging the self-vibration period of the structure, and after the vibration isolation technology is adopted, the earthquake resistance of the building is obviously improved, and the method is suitable for various buildings such as disaster prevention and relief buildings, school buildings, important infrastructure buildings, houses, offices and the like in high-intensity earthquake areas. The position of the shock insulation layer can be arranged on a foundation bottom plate, a basement top plate, a large chassis skirt roof and the like, and fig. 1 and 2 are the positions of the shock insulation layer which are commonly adopted.
The shock insulation layer sets up in the shock insulation structure of foundation pad promptly for the foundation shock insulation (like figure 1), and the advantage of foundation shock insulation lies in that the main floor of building all is above the shock insulation layer, and the shock resistance of building above the shock insulation layer all obtains improving, and vertical transportation and equipment pipeline need not to pass through the shock insulation layer simultaneously, avoids setting up the flexonics. For a structure with a basement, a base shock insulation groove needs to be arranged, and a retaining wall is arranged outside the groove.
The foundation isolation is mainly suitable for buildings with regular vertical structures, and for vertical irregular buildings (such as large chassis, large platform multi-tower structures, complex high-rise buildings with structural conversion layers, and the like), buildings with special geographic positions (such as buildings built on hillsides, and the like), and additional-layer buildings with old structures which need to keep the original appearance of the buildings, the structure is suitable for adopting layer isolation at this time, namely, the isolation layer is arranged between floors (such as between a basement top plate and a first-layer bottom plate, between a large chassis top plate and a tower bottom plate, and the like) (such as fig. 2).
In practical engineering, in order to meet the functional requirements, a local basement or a building with different basement layers exists, at this time, a cross-layer vibration isolation mode is often adopted, namely, a vibration isolation layer in a local basement area is also arranged at a base plate position (as shown in fig. 3) to form a lower vibration isolation layer, and thus, the elevation of the upper vibration isolation layer and the elevation of the lower vibration isolation layer are different to form a cross-layer vibration isolation. For cross-layer isolation, the deformation of the upper and lower isolation layer supports is asynchronous and the vibration characteristic is complicated due to insufficient rigidity and bearing capacity of the local basement, and the isolation layer of the local basement is arranged on the foundation base plate, so that the retaining wall at the outer side of the local basement is separated from the basement structure due to the existence of isolation joints, and the retaining wall cannot act with the vertical members of the local basement together to resist soil pressure, so that the retaining wall has large reinforcement and poor economical efficiency.
Therefore, for the buildings with different local basements or basement layers, when the local basements or basement layers are different in areas, the lateral rigidity and the bearing capacity of the areas are insufficient to ensure that the deformation of the upper and lower shock insulation layer supports is asynchronous, and the areas are difficult to strengthen (for example, the local basements are of frame structures, the cross section of the frame beam columns is limited, and the shear walls and other lateral resistant members cannot be arranged), the above-described basic shock insulation, the interval shock insulation or the cross-layer shock insulation cannot meet the shock insulation requirements of the buildings.
Disclosure of Invention
Accordingly, the present invention is directed to a seismic isolation system with a foundation and layers combined, which is helpful for solving the problem of arranging seismic isolation layers of buildings with local basements or different basement layers.
To achieve the above object, according to one aspect of the present invention, there is provided a shock insulation system in which a foundation is combined with an interlayer.
The invention provides a shock isolation system, which comprises a base shock isolation layer and an interlayer shock isolation layer, wherein:
the foundation shock insulation layer is arranged on a foundation slab of the building;
the floor isolation layer is arranged at the top of the floor with the same elevation as the basic isolation layer.
The base isolation layer comprises a base isolation support, the inter-layer isolation layer comprises a layer isolation support, and the base isolation support and the inter-layer isolation support are located at the same elevation.
For a building with a local basement, the base isolation layer is arranged in a basement-free area, and the interlayer isolation layer is arranged at the top of the basement.
The foundation vibration isolation support is arranged on a foundation bottom plate of the basement-free area, the interval vibration isolation support is arranged on a column top or a shear wall top or a top plate of the local basement, and the foundation vibration isolation support and the interval vibration isolation support are located at the same elevation.
For the whole building, the basement is arranged, but the basement layers of different areas are different, the basic shock insulation layer is arranged in the area with less basement layers, and the interlayer shock insulation layer is arranged in the area with more basement layers.
The foundation isolation bearing is arranged on a foundation bottom plate of an area with few basement layers, and the interlayer isolation bearing is arranged on the top of the basement floor with the same elevation as the foundation isolation bearing.
The top of the basement floor is a column top or a shear wall top or a top plate with the same elevation as the basic shock insulation support.
The shock isolation system combining the foundation and the interlayer has the following beneficial effects:
The earthquake isolation system combining the foundation and the layers can solve the problem of arrangement of the earthquake isolation layers of buildings with local basements or basement layers in different areas (basement foundation soleplates are not at the same elevation). The floor top of the same elevation with the basic shock insulation layer is arranged on the layer isolation layer, so that the adverse conditions of asynchronous support deformation and complicated vibration characteristics caused by insufficient rigidity and bearing capacity of a local basement are avoided.
The base shock insulation support and the interval shock insulation support are at the same elevation, so that the harmony and the synchronism of the deformation of the support are ensured, and a good shock insulation effect can be realized.
For buildings where localized basements exist, the present invention may reduce the requirements for localized basement stiffness and load-bearing capacity. For example:
1) For cross-layer isolation, the bearing capacity of the vertical members of the local basement needs to meet the requirement of large earthquake elasticity, and the side-shifting rigidity meets the requirement of not more than 1/1500 under the large earthquake;
2) For the vertical members of the local basement in the earthquake isolation mode, only the shearing elasticity and bending non-yielding under the heavy earthquake are required to be met, the lateral movement rigidity is only required to be met, and the requirement of not more than 1/700 under the fortification earthquake is also required (1/700 is that the local basement is a reinforced concrete earthquake-resistant wall, a slab column-earthquake-resistant wall structure, and the lateral movement rigidity requirement for other structure types is lower, as shown in table 1), so that the structure cost is greatly reduced.
TABLE 1 limit of the displacement angle between elastic layers under the influence of a protective earthquake for the lower structure
For a building with a local basement, if a seismic isolation layer of the local basement is arranged on a foundation slab, a plurality of elevation setting seismic isolation trenches can be caused, and seismic isolation joints are reserved. The invention only needs to arrange the shock insulation groove and reserve the shock insulation seam at the same elevation, thereby greatly reducing the construction difficulty.
For a building with a local basement, such as a seismic isolation layer of the local basement is arranged on a foundation base plate, the retaining wall at the outer side of the local basement is separated from the basement structure due to the existence of the seismic isolation joint, and the retaining wall cannot act together with the vertical members of the local basement to resist the soil pressure. The vibration isolation ditch is not positioned in the local basement, so that the structure of the local basement and the retaining wall can form a whole to resist soil pressure, the thickness and reinforcement of the retaining wall of the local basement are reduced, and the manufacturing cost is reduced.
Drawings
For purposes of illustration and not limitation, the invention will now be described in accordance with its preferred embodiments, particularly with reference to the accompanying drawings, in which:
FIG. 1 is a schematic view of a base seismic isolation.
Fig. 2 is a schematic view of a layer separation shock.
FIG. 3 is a cross-layer seismic isolation schematic.
Fig. 4 is a schematic diagram of a seismic isolation system of the present invention in combination between floors in a local basement building.
FIG. 5 is a schematic diagram of a seismic isolation system of the invention combining foundation and floors in a building having different floors.
Wherein, 1-basic shock insulation layer, 2-interval isolation layer, 3-basic shock insulation support, 4-isolation ditch, 5-foundation slab in basement area, 6-foundation slab in basement area, 7-isolation layer roof beam, 8-structure column or shear wall (or basement roof) of basement, 9-retaining wall, 10-layer isolation support.
Detailed Description
Example 1 vibration isolation System for combining foundations and floors in a local basement building
Referring to fig. 4, a shock isolation system for combining foundations with floors in a local basement building is shown. Wherein, the foundation isolation layer 1 is arranged in the basement-free area, and the foundation isolation support 3 is arranged on the foundation bedplate 5 in the basement-free area. The layer isolation bearing 2 is arranged in the area of the local basement, the layer isolation bearing 10 is arranged on the column top or the shear wall top or the top plate 8 of the area of the local basement, and the base isolation bearing 3 and the layer isolation bearing 10 are positioned at the same elevation. The foundation vibration isolation support and the interval vibration isolation support are at the same elevation, so that the coordination and the synchronism of the deformation of the supports are ensured, the foundation vibration isolation support is suitable for the building of a local basement, and a good vibration isolation effect can be realized. The isolation trench 4 is located between the base isolation layer 1 or the interval isolation layer 2 and the retaining wall 9, between the isolation layer beam 7 and the retaining wall 9, and between the base isolation bearing 3 and the retaining wall 9, the isolation trench 4 is separated from the base isolation layer 1 or the interval isolation layer 2, the isolation trench 4 is separated from the base isolation bearing 3, and the isolation trench 4 is separated from the isolation layer beam 7, the width of the isolation trench is determined by the maximum horizontal displacement of the isolation bearing under an earthquake.
Example 2 vibration isolation System for Foundation and layer-to-layer combination in buildings with different regional basement layers
Referring to fig. 5, a seismic isolation system is shown for combining foundations and floors in a building with different numbers of basement floors in different areas. Wherein, the base isolation layer 1 is arranged in the area with few basement layers, and the base isolation support 3 is arranged on the base plate 5 in the area with few basement layers. The layer isolation bearing 10 is arranged at the top of the basement floor with the same elevation as the base isolation bearing 3, and can be a column top or a shear wall top or a top plate with the same elevation as the base isolation bearing, wherein the base isolation bearing 3 and the layer isolation bearing 10 are positioned at the same elevation. The foundation vibration isolation support and the interval vibration isolation support are at the same elevation, so that the coordination and the synchronism of the deformation of the supports are ensured, the foundation vibration isolation support is suitable for the building of a local basement, and a good vibration isolation effect can be realized.
The isolation trench 4 is positioned between the base isolation layer 1 or the interval isolation layer 2 and the retaining wall 9, between the isolation layer beam 7 and the retaining wall 9, and between the base isolation bearing 3 and the retaining wall 9, the isolation trench 4 is separated from the base isolation layer 1 or the interval isolation layer 2, the isolation trench 4 is separated from the base isolation bearing 3, the isolation trench 4 is separated from the isolation layer beam 7, and the width of the isolation trench is determined by the maximum horizontal displacement of the isolation bearing under the earthquake.
The design of the shock insulation structure comprises the steps of long-term surface pressure control of a shock insulation support, eccentricity control of the shock insulation layer, recovery force checking calculation and deformation difference among the shock insulation supports, horizontal damping coefficient calculation under the action of a middle shock, horizontal displacement control of the shock insulation support under the action of rare earthquakes, short-term minimum and maximum surface pressure checking calculation, horizontal shearing force checking calculation and the like, wherein the shock insulation structure provided with a damper is required to be subjected to damper stroke and maximum output force checking calculation, the structure provided with a tensile device is required to be subjected to tensile device bearing force checking calculation, wind resistance bearing force checking calculation of the shock insulation layer under the action of wind load, deformation calculation of the shock insulation layer under the action of temperature, and bearing force checking calculation of a conversion beam, a shock insulation support pier, a support column and connecting components. Besides the problems, the bearing capacity and the rigidity of the related components for directly supporting the shock insulation support in the structure below the shock insulation layer (such as a basement) are checked, so that the bearing capacity and the deformation requirements under large shock are met.
The shock isolation system combining the foundation and the interlayer provided by the invention has the following characteristics and beneficial effects:
(1) The foundation isolation support is positioned on the foundation base plate in the basement-free area;
(2) The layer isolation bearing is positioned at the top of the basement and can be supported at the top of a column or a shear wall or a top plate of the local basement;
(3) The foundation shock insulation support arranged on the foundation bottom plate and the interlayer shock insulation support arranged at the top of the local basement are positioned at the same elevation;
(4) The foundation vibration isolation support and the interlayer vibration isolation support are at the same elevation, so that the coordination and the synchronism of the deformation of the supports are ensured, the foundation vibration isolation support is suitable for the construction of a local basement, and a good vibration isolation effect can be realized;
(5) The invention is suitable for the earthquake-proof buildings with local basements, and is also suitable for the earthquake-proof forms (shown in figure 5) of the buildings with different basement layers in different areas (with different elevations of the basement foundation slab). The basement is characterized in that a foundation shock insulation is adopted in a region with shallow basement burial depth (the basement layer number is small), a foundation shock insulation support is positioned on a foundation bottom plate, a layer shock insulation is adopted in a region with deep basement burial depth (the basement layer number is large), and a layer shock insulation support is positioned at the top of a basement floor with the same elevation as the foundation shock insulation.
The above embodiments do not limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications, combinations, sub-combinations and alternatives can occur depending upon design requirements and other factors. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of the present invention.
Claims (4)
1. A shock isolation system comprising a base shock isolation layer and an inter-spacer shock isolation layer, wherein:
the foundation shock insulation layer is arranged on a foundation slab of the building;
the floor isolation layer is arranged at the top of the floor with the same elevation as the basic isolation layer;
The foundation isolation layer comprises a foundation isolation support, the interval isolation layer comprises a layer isolation support, and the foundation isolation support and the layer isolation support are located at the same elevation;
The shock isolation system is a shock isolation system which combines the foundation and the layer in a local basement building or a shock isolation system which combines the foundation and the layer in a building with different basement layers in different areas,
For a building with a local basement, the base shock insulation layer is arranged in a basement-free area, and the interlayer shock insulation layer is arranged at the top of the basement;
for the whole building, which has basements but different basement layers in different areas, the basic shock insulation layer is arranged in the area with less basement layers;
The shock isolation system is also provided with a shock isolation ditch, and the width of the shock isolation ditch is determined by the maximum horizontal displacement of the shock isolation support under the earthquake.
2. The shock isolation system of claim 1, wherein:
The foundation vibration isolation support is arranged on a foundation bottom plate of the basement-free area, the interval vibration isolation support is arranged on a column top or a shear wall top or a top plate of the local basement, and the foundation vibration isolation support and the interval vibration isolation support are located at the same elevation.
3. The shock isolation system of claim 1, wherein:
The foundation isolation support is arranged on a foundation bottom plate of an area with few basement floors, and the interlayer isolation support is arranged on the top of the basement floor with the same elevation as the foundation isolation support.
4. The shock isolation system of claim 3, wherein the basement floor top is a roof or shear wall top or roof of the same elevation as the base shock isolation mount.
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| CN202010427676.4A CN111576495B (en) | 2020-05-19 | 2020-05-19 | A seismic isolation system combining foundation and interlayer |
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| CN202010427676.4A CN111576495B (en) | 2020-05-19 | 2020-05-19 | A seismic isolation system combining foundation and interlayer |
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| CN113565138A (en) * | 2021-06-30 | 2021-10-29 | 上海核工程研究设计院有限公司 | Separated anti-swing three-dimensional shock isolation structure |
| CN115787700A (en) * | 2022-09-19 | 2023-03-14 | 沙焕焕 | LNG storage tank box foundation form's structural system |
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| CN213836761U (en) * | 2020-05-19 | 2021-07-30 | 北京市建筑设计研究院有限公司 | Shock insulation system combining foundation and interlayer |
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| JP3690438B2 (en) * | 1997-01-16 | 2005-08-31 | 清水建設株式会社 | Damping structure |
| DE19734993A1 (en) * | 1997-08-13 | 1999-03-11 | Friedhelm Bierwirth | Earthquake protection through vibration-decoupled storage of buildings and objects via virtual pendulums with a long period |
| JP6489057B2 (en) * | 2015-04-28 | 2019-03-27 | Ｕａｏ株式会社 | Extension method of existing building and earthquake-resistant repair method |
| JP6970489B2 (en) * | 2015-05-07 | 2021-11-24 | ヤクモ株式会社 | Multi-tiered seismic isolation floor |
| JP6895729B2 (en) * | 2016-10-03 | 2021-06-30 | 大成建設株式会社 | How to build a seismic isolated building on the middle floor and a seismic isolated building on the middle floor |
| CN107152099B (en) * | 2017-05-25 | 2020-10-02 | 广州容柏生建筑结构设计事务所(普通合伙) | Method for arranging interlayer shock insulation structures with different elevations |
| CN107191047B (en) * | 2017-06-29 | 2021-11-12 | 北京市建筑设计研究院有限公司 | Shock insulation design method for arranging shock insulation support in cross-layer mode |
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