Vibration reduction and isolation system and method for building
By adopting a double raft-layered vibration isolation system on the basis of the building, the contradiction between the vibration isolation effect and the number of vibration isolators in the existing technology is solved, and effective reduction of the vibration of the subway environment is achieved.
Patent Information
- Application Number
- CN202411678439.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-02-25
AI Technical Summary
In the prior art, there is a contradiction between the vibration isolation effect and the number of vibration isolators in the vibration reduction design method, and it is difficult to effectively reduce the impact of environmental vibration such as subway operation on buildings.
A double raft-layered vibration isolation system is adopted, and is connected to the building through the first raft foundation, the bottom of the first raft foundation is connected to the second raft foundation, and the bottom of the second raft foundation is connected to the ground through the second vibration isolator, forming a double raft layered structure to reduce the impact of environmental vibration.
It effectively reduces the environmental vibration impact caused by surrounding subway operations, improves the vibration isolation effect of buildings, and avoids the contradiction between the number of vibration isolators and the effect.
Smart Images
Figure CN119507486A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of building vibration reduction, and in particular to a vibration reduction and isolation system and method for a building. Background Art
[0002] In the process of urban renewal, land resources in the urban core area are scarce, and the land around the subway is subject to the influence of subway environmental vibration, making it difficult to develop and utilize with high quality. Therefore, by carrying out reasonable vibration reduction and isolation design to reduce the influence of environmental vibration caused by subway operation, the land resources along the subway line can be greatly released and huge value can be created. At present, the commonly used vibration reduction and isolation design mostly uses vibration isolators, but the vibration reduction and isolation design and optimization of building complexes involving a large number of houses are still extremely challenging, and the commonly used methods face the contradiction between the vibration isolation effect and the number of vibration isolators. Summary of the invention
[0003] The technical problem to be solved by the present disclosure is to overcome the defect of the vibration reduction and isolation design mode in the prior art, which has the contradiction between the vibration isolation effect and the number of vibration isolators, and to provide a vibration reduction and isolation system and method for a building.
[0004] The present invention solves the above technical problems through the following technical solutions:
[0005] A first aspect of the present disclosure provides a vibration reduction and isolation system for a building, the vibration reduction and isolation system comprising a first raft foundation, a second raft foundation, a first vibration isolator and a second vibration isolator;
[0006] The top of the first raft foundation is connected to the building, the bottom of the first raft foundation is connected to the top of the second raft foundation through the first vibration isolator, and the bottom of the second raft foundation is connected to the ground through the second vibration isolator to form a double raft layered vibration reduction and isolation system.
[0007] Preferably, the first vibration isolator is built into the first raft foundation.
[0008] Preferably, there is a gap between the first raft foundation and the second raft foundation.
[0009] Preferably, the first vibration isolator is a first spring vibration isolator.
[0010] Preferably, the second vibration isolator is a second spring vibration isolator.
[0011] Preferably, when there are multiple buildings, the multiple buildings are respectively connected to the tops of the multiple first raft foundations.
[0012] Preferably, when there are multiple buildings, each building is connected to the common second raft foundation via a first vibration isolator built into the first raft foundation connected to each building.
[0013] The second aspect of the present disclosure provides a vibration reduction and isolation method for a building, the vibration reduction and isolation method is applicable to the vibration reduction and isolation system for the building described in the first aspect, and is characterized in that the vibration reduction and isolation method comprises:
[0014] Obtain the total stiffness matrix, total damping matrix, displacement value, velocity value, acceleration value of the vibration reduction and isolation system and the total mass matrix of the building;
[0015] Obtaining a total load vector of external vibration according to the total stiffness matrix, the total damping matrix, the displacement value, the velocity value, the acceleration value, and the total mass matrix of the building;
[0016] Parameters of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator are adjusted according to the total load vector.
[0017] Preferably, the vibration reduction and isolation method further comprises:
[0018] Obtain target first raft foundation, target second raft foundation, target first vibration isolator and target second vibration isolator corresponding to the adjusted parameters of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator.
[0019] Preferably, the step of obtaining the total stiffness matrix and the total damping matrix of the vibration reduction and isolation system includes:
[0020] Obtaining the connection stiffness value and connection damping value between the building and the first raft foundation;
[0021] Obtaining a stiffness value and a damping value of a first vibration isolator and a stiffness value and a damping value of a second vibration isolator;
[0022] Acquire a total stiffness matrix of the vibration reduction and isolation system according to the connection stiffness value, the stiffness value of the first vibration isolator, and the stiffness value of the second vibration isolator;
[0023] The total damping matrix of the vibration reduction and isolation system is obtained according to the connection damping value, the damping value of the first vibration isolator and the damping value of the second vibration isolator. Based on the common sense in the art, the above-mentioned preferred conditions can be combined arbitrarily to obtain the preferred embodiments of the present disclosure.
[0024] The positive and progressive effects of this disclosure are:
[0025] The present invention adopts a second raft foundation whose lower part is connected to the ground through a second vibration isolator, and whose upper part is connected to the first raft foundation connected to the building through a first vibration isolator, thereby forming a double-raft layered vibration reduction and isolation system, thereby reducing the impact of environmental vibration generated by the operation of surrounding subways. BRIEF DESCRIPTION OF THE DRAWINGS
[0026] Figure 1 A schematic structural diagram of a vibration reduction and isolation system for a building provided in Example 1 of the present disclosure;
[0027] Figure 2 This is a flow chart of the vibration reduction and isolation method for a building provided in Example 2 of the present disclosure.
[0028] Figure 3 This is a simplified schematic diagram of the vibration reduction and isolation method for a building provided in Example 2 of the present disclosure. DETAILED DESCRIPTION
[0029] The present disclosure is further described below by way of examples, but the present disclosure is not limited to the scope of the examples.
[0030] Prefixes such as "first" and "second" are used in the embodiments of the present disclosure only to distinguish different description objects, and have no limiting effect on the position, order, priority, quantity or content of the described objects. The use of prefixes such as ordinal numbers to distinguish description objects in the embodiments of the present disclosure does not constitute a limitation on the described objects. For the statement of the described objects, please refer to the description in the context of the claims or embodiments, and no unnecessary limitation should be constituted due to the use of such prefixes. In addition, in the description of the present embodiment, unless otherwise specified, the meaning of "plurality" is two or more.
[0031] In the embodiments of the present disclosure, the collection, storage, use, processing, transmission, provision and disclosure of user personal information involved are in compliance with the provisions of relevant laws and regulations and do not violate public order and good morals.
[0032] Example 1
[0033] Figure 1 A structural schematic diagram of a vibration reduction and isolation system for a building provided by an exemplary embodiment of the present disclosure is shown in FIG. Figure 1 As shown, the vibration reduction and isolation system includes a first raft foundation 2, a second raft foundation 1, a first vibration isolator 5 and a second vibration isolator 4;
[0034] The top of the first raft foundation 2 is connected to the building 3, the bottom of the first raft foundation 2 is connected to the top of the second raft foundation 1 through the first vibration isolator 5, and the bottom of the second raft foundation 1 is connected to the ground through the second vibration isolator 4 to form a double raft layered vibration reduction and isolation system.
[0035] In this embodiment, the first raft foundation 2 is usually a floating plate raft foundation 2 (i.e., a small raft foundation 2). The floating plate raft foundation 2 of each building is connected to the second raft foundation 1 (i.e., a large raft foundation 1) shared below through a first vibration isolator 5. The second raft foundation 1 is then connected to the rigid ground through a second vibration isolator 4 to form a double raft layered vibration isolation system to reduce the impact of environmental vibration generated by the operation of the surrounding subway.
[0036] In this embodiment, the lower part of the second raft foundation is connected to the ground through a second vibration isolator, and the upper part of the second raft foundation is connected to the first raft foundation connected to the building through a first vibration isolator, forming a double-raft layered vibration reduction and isolation system, thereby reducing the impact of environmental vibration generated by the surrounding subway operation.
[0037] In an optional embodiment, if Figure 1 As shown, the first vibration isolator 5 is built into the first raft foundation 2 .
[0038] In an optional embodiment, if Figure 1 As shown, there is a gap between the first raft foundation 2 and the second raft foundation 1 .
[0039] In this embodiment, a first vibration isolator 5 is built into the floating slab raft foundation 2 below the building, which is connected to the second raft foundation 1 below with a gap between them, allowing the building to move vertically to dissipate energy and reduce vibration.
[0040] In an optional embodiment, the first vibration isolator is a first spring vibration isolator.
[0041] In an optional embodiment, the second vibration isolator is a second spring vibration isolator.
[0042] In this embodiment, the first vibration isolator and the second vibration isolator are both spring vibration isolators.
[0043] In an optional embodiment, when there are multiple buildings, the multiple buildings are respectively connected to the tops of the multiple first raft foundations 2 .
[0044] In an optional embodiment, when there are multiple buildings, each building is connected to the common second raft foundation 1 via the first vibration isolators 5 built in the first raft foundation 2 connected to each building.
[0045] In this embodiment, a plurality of buildings may share the second raft foundation 1 to reduce uneven settlement, and may be connected thereto via the first vibration isolator 5 in the floating slab raft foundation 2 .
[0046] It should be noted that the floating slab raft foundation 2 and the first vibration isolator 5 under each building can be individually designed to adapt to changes in parameters such as the mass of the building.
[0047] In this embodiment, a double-raft layered vibration reduction and isolation system of the building complex is established by means of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator. On this basis, the upper building can be simplified into a mass block, the first raft foundation and the second raft foundation can be simplified into a generalized beam, the first vibration isolator and the second vibration isolator can be simplified into a spring damping unit, and the total stiffness matrix, the total mass matrix, the total damping matrix and the total load vector are established by the finite element method, so as to calculate the natural frequency and vibration response of the vibration reduction and isolation system, and then select appropriate vibration isolator parameters and optimize the design.
[0048] This embodiment adopts a double-layer raft foundation. The lower second raft foundation 1 (i.e., the large raft foundation 1) can effectively reduce the uneven settlement of the building and play the first vibration isolation effect. The upper first raft foundation 2 (i.e., the floating slab raft foundation 2) selects appropriate seismic isolation parameters according to the structural form of each building, which reflects the personalization of the vibration isolation system.
[0049] Example 2
[0050] The present disclosure also provides a vibration reduction and isolation method for a building, which is applicable to the vibration reduction and isolation system of the building in Example 1, such as Figure 2 As shown, the vibration reduction and isolation method includes:
[0051] S1. Obtain the total stiffness matrix, total damping matrix, displacement value, velocity value, acceleration value of the vibration reduction and isolation system and the total mass matrix of the building;
[0052] S2. Obtain the total load vector of the external vibration according to the total stiffness matrix, the total damping matrix, the displacement value, the velocity value, the acceleration value and the total mass matrix of the building;
[0053] S3. Adjust parameters of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator according to the total load vector.
[0054] In this embodiment, the first vibration isolator and the second vibration isolator are taken as nodes, and the space between the two nodes is simplified to a beam unit. The total stiffness matrix K of the vibration reduction and isolation system, the total mass matrix M of each building, the total damping matrix C of the vibration reduction and isolation system, and the total load vector P of the external vibration are established for each unit and node through the finite element method. According to formula (1), the parameters of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator are adjusted according to the acceleration minimization principle.
[0055]
[0056] In an optional embodiment, the vibration reduction and isolation method further includes:
[0057] Obtain target first raft foundation, target second raft foundation, target first vibration isolator and target second vibration isolator corresponding to the adjusted parameters of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator.
[0058] In this embodiment, a double raft layered vibration reduction and isolation system is established according to the acquired target first raft foundation, target second raft foundation, target first vibration isolator and target second vibration isolator.
[0059] In an optional embodiment, the step of obtaining the total stiffness matrix and the total damping matrix of the vibration reduction and isolation system in step S1 includes:
[0060] S11, obtaining a connection stiffness value and a connection damping value between the building and the first raft foundation;
[0061] S12, obtaining a stiffness value and a damping value of the first vibration isolator and a stiffness value and a damping value of the second vibration isolator;
[0062] S13, obtaining a total stiffness matrix of the vibration reduction and isolation system according to the connection stiffness value, the stiffness value of the first vibration isolator, and the stiffness value of the second vibration isolator;
[0063] S14, obtaining a total damping matrix of the vibration reduction and isolation system according to the connection damping value, the damping value of the first vibration isolator, and the damping value of the second vibration isolator.
[0064] In the specific implementation process, Figure 3 As shown in the figure, a typical section is selected, the isolator spacing (for example, the first isolator spacing or the second isolator spacing) is used as the calculation width, and the following two-dimensional simplification is performed: the upper building is simplified as a mass block m 1 ~m n , where n represents the total amount of buildings located on the same second raft foundation 1 (i.e. large raft foundation 1), and its connection stiffness value and connection damping score with the first raft foundation 2 (i.e. floating slab raft foundation 2) are k 1 and c 1 ;
[0065] The first raft foundation 2 (i.e., floating slab raft foundation 2) and the second raft foundation 1 (i.e., large raft foundation 1) are simplified as generalized beams, the first vibration isolator 5 and the second vibration isolator 4 are both used as nodes, and the space between the two nodes is simplified as a beam unit, and its mass value, stiffness value and damping value are respectively n 1 Indicates the number of units (from 1 to n) of the first raft foundation 2 (i.e., the floating slab raft foundation 2) 1 ), n 2 Indicates the number of units (from 1 to n) of the second raft foundation 1 (i.e., large raft foundation 1). 2 indivual);
[0066] The first vibration isolator 5 and the second vibration isolator 4 are simplified as spring damping units, and the upper and lower unit nodes are connected to the unit nodes of the first raft foundation 2 (i.e., the floating slab raft foundation 2) and the second raft foundation 1 (i.e., the large raft foundation 1). The stiffness and damping values of the first vibration isolator 5 built in the first raft foundation 2 (i.e., the floating slab raft foundation 2) are k 2 , c 2 , the stiffness and damping values of the second vibration isolator 4 are k 3 , c 3 ;
[0067] This embodiment simplifies the mass, damping and stiffness of the above-mentioned vibration reduction and isolation system, establishes a matrix operation formula, and realizes the rapid calculation of the natural frequency and vibration response of the vibration reduction and isolation system. Through the vibration reduction and isolation simplified calculation method, a scientific basis is provided for the optimization of vibration reduction and isolation design and the selection of vibration reduction and isolation device parameters.
[0068] As for the system embodiment, since it basically corresponds to the method embodiment, the relevant parts can refer to the partial description of the method embodiment. The system embodiment described above is only illustrative, wherein the units described as separate components may or may not be physically separated, and the components as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the disclosed solution.
[0069] Although the specific embodiments of the present disclosure are described above, those skilled in the art should understand that this is only an example, and the protection scope of the present disclosure is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present disclosure, but these changes and modifications all fall within the protection scope of the present disclosure.
Claims
1. A vibration reduction and isolation system for a building, characterized in that: The vibration reduction and isolation system comprises a first raft foundation, a second raft foundation, a first vibration isolator and a second vibration isolator; The top of the first raft foundation is connected to the building, the bottom of the first raft foundation is connected to the top of the second raft foundation through the first vibration isolator, and the bottom of the second raft foundation is connected to the ground through the second vibration isolator to form a double raft layered vibration reduction and isolation system.
2. The vibration reduction and isolation system for a building according to claim 1, characterized in that: The first vibration isolator is built into the first raft foundation.
3. The vibration reduction and isolation system for a building according to claim 1, characterized in that: There is a gap between the first raft foundation and the second raft foundation.
4. The vibration reduction and isolation system for a building according to claim 1, characterized in that: The first vibration isolator is a first spring vibration isolator.
5. The vibration reduction and isolation system for a building according to claim 1, characterized in that: The second vibration isolator is a second spring vibration isolator.
6. The vibration reduction and isolation system for a building according to claim 1, characterized in that: In case that there are plural buildings, the plural buildings are respectively connected to the upper parts of the plural first raft foundations.
7. The vibration reduction and isolation system for a building according to claim 1, characterized in that: In case that there are multiple buildings, each building is connected to the common second raft foundation through a first vibration isolator built in the first raft foundation connected to each building.
8. A vibration reduction and isolation method for a building, the vibration reduction and isolation method being applicable to the vibration reduction and isolation system for a building as claimed in any one of claims 1 to 7, characterized in that: The vibration reduction and isolation method comprises: Obtain the total stiffness matrix, total damping matrix, displacement value, velocity value, acceleration value of the vibration reduction and isolation system and the total mass matrix of the building; Obtaining a total load vector of external vibration according to the total stiffness matrix, the total damping matrix, the displacement value, the velocity value, the acceleration value, and the total mass matrix of the building; Parameters of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator are adjusted according to the total load vector.
9. The vibration reduction and isolation method for a building according to claim 8, characterized in that: The vibration reduction and isolation method further comprises: Obtain target first raft foundation, target second raft foundation, target first vibration isolator and target second vibration isolator corresponding to the adjusted parameters of the first raft foundation, the second raft foundation, the first vibration isolator and the second vibration isolator.
10. The vibration reduction and isolation method for a building according to claim 8, characterized in that: The step of obtaining the total stiffness matrix and the total damping matrix of the vibration reduction and isolation system comprises: Obtaining the connection stiffness value and connection damping value between the building and the first raft foundation; Obtaining a stiffness value and a damping value of a first vibration isolator and a stiffness value and a damping value of a second vibration isolator; Acquire a total stiffness matrix of the vibration reduction and isolation system according to the connection stiffness value, the stiffness value of the first vibration isolator, and the stiffness value of the second vibration isolator; A total damping matrix of the vibration reduction and isolation system is obtained according to the connection damping value, the damping value of the first vibration isolator, and the damping value of the second vibration isolator.