Parameter determination method in wind-induced building micro-vibration control design

Abstract

The invention provides a parameter determination method in wind-induced building micro-vibration control design. The method comprises the following steps: determining a vibration control index; site actual measurement is carried out, and a vibration response actual measurement result is obtained; simulation calculation is carried out, and a vibration response simulation result and soil parameters are obtained; obtaining a correction coefficient based on the vibration response actual measurement result and the vibration response simulation result; carrying out a wind tunnel test to obtain wind load excitation; obtaining a predicted vibration result based on the soil parameters, the wind load excitation and the correction coefficient; and comparing the predicted vibration result with the vibration control index, when the predicted vibration result is greater than the vibration control index, adjusting the target parameter of the model until the predicted vibration result is not greater than the vibration control index, and obtaining the target parameter meeting the requirement. The configuration is combined with the structural design process, so that the cost of materials, construction period and the like is saved; and by optimizing related parameters of the upper structure and the foundation at the same time, the vibration reduction efficiency is maximized, and therefore the cost of related materials of vibration reduction control measures is reduced.

Description

Technical Field

[0001] The invention relates to the field of building design, in particular to a parameter determination method in wind-induced building micro-vibration control design. Background Art

[0002] With the rapid development of science and technology, in various technical fields, especially in the field of optics, the vibration control standards for test equipment and instruments are constantly improving, and the standards are gradually increasing from the micron level to the nanometer level, and the analysis time is also shortened from 10 minutes to 1 second. For this high-precision vibration control standard under such a short analysis time, in addition to the vibration response analysis under the influence of rail transit and road traffic that has been widely studied, it is also necessary to further analyze and understand the vibration response in the natural environment, in which wind loads exist all the time. Therefore, wind vibration response analysis is crucial.

[0003] At present, there are few studies on wind-induced building foundation vibration, and there is a serious lack of experience in foundation vibration control engineering design under wind-induced vibration. Based on this, how to determine the structural parameters and foundation parameters that meet the vibration control indicators in the design of wind-induced building micro-vibration control has become a technical problem that technicians in this field need to solve. Summary of the invention

[0004] The purpose of the present invention is to provide a method for determining parameters in the design of wind-induced building micro-vibration control, so as to solve the problem in the prior art that structural parameters and foundation parameters that meet vibration control indicators cannot be accurately determined.

[0005] In order to achieve the above object, the present invention provides a method for determining parameters in the design of wind-induced building micro-vibration control, comprising:

[0006] Determine vibration control indicators based on building functions and design requirements;

[0007] Conduct field measurements on the proposed site and obtain the vibration response measurement results;

[0008] Carry out soil vibration simulation calculation to obtain vibration response simulation results and soil parameters;

[0009] Obtaining a correction coefficient based on the vibration response measured result and the vibration response simulation result;

[0010] Conduct wind tunnel tests to obtain wind load excitation;

[0011] Based on the soil parameters, the wind load excitation and the correction coefficient, a soil-building interaction model is established, and simulation calculation is performed to obtain predicted vibration results;

[0012] The predicted vibration result and the vibration control index are compared. When the predicted vibration result is greater than the vibration control index, the target parameters of the soil-building interaction model are adjusted, and the simulation calculation is repeated until the predicted vibration result is less than or equal to the vibration control index, and the target parameters that meet the requirements are obtained.

[0013] Optionally, the carrying out of actual measurement of the proposed site to obtain actual measurement results of vibration response includes:

[0014] At least two observation points are arranged in the proposed site, different test conditions are set based on the surrounding road conditions of the proposed site, and the vibration response measurement results at different observation points are obtained.

[0015] Optionally, the observation point is set at a control point of the proposed building, at a peripheral road of the proposed site, at the proposed building and / or between the peripheral road of the proposed site and the proposed building.

[0016] Optionally, the performing of soil vibration simulation calculation to obtain vibration response simulation results and soil parameters includes:

[0017] Determine corresponding parameters based on actual geological survey data, establish a soil analysis model for the proposed site, and set the boundary of the soil analysis model for the proposed site outside the surrounding roads of the proposed site;

[0018] Finite element analysis is performed on the soil analysis model of the proposed site to obtain the vibration response simulation results and the soil parameters.

[0019] Optionally, obtaining the correction coefficient based on the vibration response measurement result and the vibration response simulation result includes:

[0020] Acquire the vibration response simulation result at a position consistent with the observation point actually measured at the proposed site, and compare the vibration response simulation result with the vibration response actually measured result;

[0021] If the error between the vibration response simulation result and the vibration response measured result is greater than 25%, adjusting the preset soil parameters in the soil vibration simulation calculation within a preset range, and repeating the soil vibration simulation calculation until the error between the vibration response simulation result and the vibration response measured result is less than or equal to 25%;

[0022] Based on the time history analysis results of the vibration response simulation results and the vibration response measured results, the peak ratio of the one-third octave band RMS curve is calculated, and the average of the ratios of each observation point is used as the correction coefficient.

[0023] Optionally, the peak point of the one-third octave band RMS curve is located at the natural frequency of the soil, and the natural frequency of the soil is in the range of 3 Hz to 10 Hz.

[0024] Optionally, the conducting of a wind tunnel test to obtain wind load excitation includes:

[0025] Based on the actual shape of the proposed building, a wind tunnel test model is designed, and the tops of the columns or the upper and lower chord nodes of the trusses at the roof position of the wind tunnel test model are selected as wind vibration response observation points;

[0026] A wind load that returns once in ten years or once in a year is applied to the wind tunnel test model to obtain the wind load excitation.

[0027] Optionally, the soil-building interaction model is established based on soil parameters, wind load excitation and correction coefficient, and simulation calculation is performed to obtain predicted vibration results, including:

[0028] Based on the soil parameters, a soil model is established;

[0029] Establishing an above-ground structure-foundation model and forming the soil-building interaction model;

[0030] Inputting the wind load excitation into the soil-building interaction model, determining the vibration observation points, and calculating the vibration response results of the building base plate under various working conditions;

[0031] The predicted vibration result is obtained based on the correction coefficient and the building base plate vibration response result.

[0032] Optionally, obtaining the predicted vibration result based on the correction coefficient and the building base plate vibration response result includes:

[0033] The building base plate vibration response result is multiplied by the correction coefficient to obtain the predicted vibration result.

[0034] Optionally, the target parameters include: strength of the ground structure material, elastic modulus, structural stiffness, pile foundation density, pile foundation diameter and pile foundation base plate range.

[0035] In summary, this embodiment provides a method for determining parameters in the design of wind-induced micro-vibration control of buildings, including: determining vibration control indicators based on building functions and design requirements; conducting actual measurements of the proposed site to obtain actual vibration response results; conducting soil vibration simulation calculations to obtain vibration response simulation results and soil parameters; obtaining correction coefficients based on the actual vibration response results and the vibration response simulation results; conducting wind tunnel tests to obtain wind load excitations; establishing a soil-building interaction model based on the soil parameters, the wind load excitations and the correction coefficients, and performing simulation calculations to obtain predicted vibration results; comparing the predicted vibration results with the vibration control indicators, and when the predicted vibration results are greater than the vibration control indicators, adjusting the target parameters of the soil-building interaction model, repeating simulation calculations until the predicted vibration results are less than or equal to the vibration control indicators, and obtaining the target parameters that meet the requirements. Compared with existing building micro-vibration control design methods, this application has the following advantages:

[0036] (1) This application obtains the corresponding correction coefficient by combining the actual measurement of the proposed site and the simulation calculation of soil vibration, obtains the wind load excitation through wind tunnel test, and then obtains the predicted vibration result by establishing a soil-building interaction model for simulation calculation. Finally, the predicted vibration result and the vibration control index are compared until the target parameters that meet the requirements are obtained. Such configuration, combined with actual measurement and simulation, improves the accuracy of the model; at the same time, when the predicted vibration result obtained does not meet the requirements, the corresponding parameters of the model are adjusted for optimization, and the simulation is repeated to ensure that the obtained parameters meet the requirements of the vibration control index; in addition, the parameter determination method provided by this application is combined with the structural design process, and reasonable vibration reduction measures can be proposed in the early stage of building construction, saving materials, construction period and other costs; and by simultaneously optimizing the relevant parameters of the superstructure and foundation, the vibration reduction efficiency is maximized, thereby further reducing the material cost related to the vibration reduction control measures;

[0037] (2) This application compares the vibration response simulation results with the vibration response measured results. When the error between the two is greater than a preset range, the preset soil parameters in the soil analysis model of the proposed site are readjusted, and the simulation is performed again until the error is less than the preset range, thereby further improving the accuracy of the soil analysis model of the proposed site and making it closer to the actual soil performance of the proposed site;

[0038] (3) This application further improves the accuracy of the vibration response simulation results by controlling the peak point of the one-third octave band RMS curve to be located at the natural frequency of the soil, and the natural frequency of the soil is in the range of 3 Hz to 10 Hz, thereby making the soil analysis model of the proposed site more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 A flow chart of a method for determining parameters in the design of wind-induced building micro-vibration control provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0040] In order to make the purpose, advantages and features of the present invention clearer, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the drawings are all in a very simplified form and are not drawn to scale, and are only used to conveniently and clearly assist in explaining the purpose of the embodiments of the present invention. In addition, the structure shown in the drawings is often a part of the actual structure. In particular, the emphasis of each drawing is different, and sometimes different scales are used.

[0041] As used in this specification, the singular forms "a", "an" and "the" include plural objects, the term "or" is generally used to include the meaning of "and / or", the term "several" is generally used to include the meaning of "at least one", and the term "at least two" is generally used to include the meaning of "two or more". In addition, the terms "first", "second" and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, "one end" and "the other end" and "the proximal end" and "the distal end" generally refer to two corresponding parts, which include not only the endpoints, and the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. In addition, as used in this specification, an element disposed on another element generally only indicates that there is a connection, coupling, cooperation or transmission relationship between the two elements, and the connection, coupling, cooperation or transmission between the two elements may be direct or indirect through an intermediate element, and it cannot be understood as indicating or implying the spatial position relationship between the two elements, that is, one element may be in any orientation such as inside, outside, above, below or on one side of another element, unless the content clearly indicates otherwise. The terms "upper", "lower", "top" and "bottom" are generally relative position relationships arranged in the direction of gravity; the terms "vertical, vertical direction" generally refer to the direction of gravity, which is generally perpendicular to the ground, and "horizontal, horizontal plane direction" generally refers to the direction parallel to the ground; for ordinary technicians in this field, the specific meanings of the above terms in this specification can be understood according to specific circumstances.

[0042] The purpose of the present invention is to provide a method for determining parameters in the design of wind-induced building micro-vibration control, so as to solve the problem in the prior art that structural parameters and foundation parameters that meet vibration control indicators cannot be accurately determined.

[0043] Please refer to Figure 1 The present invention provides a method for determining parameters in the design of wind-induced building micro-vibration control, comprising:

[0044] Step S1: Determine vibration control indicators based on building functions and design requirements;

[0045] Step S2: Conduct actual measurement of the proposed site to obtain actual measurement results of vibration response;

[0046] Step S3: Conduct soil vibration simulation calculation to obtain vibration response simulation results and soil parameters;

[0047] Step S4: obtaining a correction coefficient based on the vibration response measurement result and the vibration response simulation result;

[0048] Step S5: Conduct wind tunnel test to obtain wind load excitation;

[0049] Step S6: Based on soil parameters, wind load excitation and correction coefficient, a soil-building interaction model is established, and simulation calculation is performed to obtain predicted vibration results;

[0050] Step S7: Compare the predicted vibration result and the vibration control index. When the predicted vibration result is greater than the vibration control index, adjust the target parameters of the soil-building interaction model, repeat the simulation calculation until the predicted vibration result is less than or equal to the vibration control index, and obtain the target parameters that meet the requirements.

[0051] With such configuration, the corresponding correction coefficient is obtained by combining the actual measurement of the proposed site and the simulation calculation of soil vibration, and the wind load excitation is obtained through wind tunnel test. Then, the predicted vibration results are obtained by establishing a soil-building interaction model for simulation calculation, and finally, the predicted vibration results and vibration control indicators are compared until the target parameters that meet the requirements are obtained. The combination of actual measurement and simulation improves the accuracy of the model; at the same time, when the predicted vibration results obtained do not meet the requirements, the corresponding parameters of the model are adjusted for optimization, and the simulation is repeated to ensure that the obtained parameters meet the requirements of the vibration control indicators; in addition, the parameter determination method provided in this application is combined with the structural design process, and reasonable vibration reduction measures can be proposed in the early stage of building construction, saving materials, construction period and other costs; and by optimizing the relevant parameters of the superstructure and foundation at the same time, the vibration reduction efficiency is maximized, thereby further reducing the material cost related to the vibration reduction control measures.

[0052] A specific embodiment is given below to illustrate the whole process of the parameter determination method in the wind-induced building micro-vibration control design proposed by the present invention. It can be understood by those skilled in the art that the ranges, values, calculation methods, etc. mentioned below are only examples. In other embodiments, the relevant contents can be reasonably configured according to the actual situation, and this embodiment does not limit this.

[0053] In step S1, the designer can determine the vibration control index of different areas of the proposed building in combination with the building function and the requirements of the process task book, and match the internationally accepted vibration standard (Viberation Criterion) curve definition standard. Among them, the vibration control standard index can be the vibration frequency, or the displacement per unit time, speed, etc., and technicians in this field can select the corresponding vibration control index according to the actual situation.

[0054] In step S2, at least two observation points are arranged in the proposed site, different test conditions are set based on the surrounding road conditions of the proposed site, and the vibration response measured results at different observation points are obtained. Further, the observation points are set at the control point of the proposed building, the surrounding roads of the proposed site, the proposed building and / or between the surrounding roads of the proposed site and the proposed building. It should be noted that the proposed site usually includes the location of the proposed building and the surrounding roads. In this embodiment, the proposed site includes the location of the proposed building and four surrounding roads. At least two observation points are arranged in the proposed site, and several measuring points are arranged around each observation point, and the spacing between each measuring point is less than or equal to 50m. If the surrounding road is a proposed road, a sports car test is performed according to the traffic conditions of the surrounding proposed roads, and by setting different sports car conditions, a vibration response test is performed on the observation point to obtain the vibration response measured results of the corresponding observation point; if the surrounding road is a used road, an actual test is performed according to the traffic conditions of the surrounding used roads, and a vibration response test is performed on the observation point to obtain the vibration response measured results of the corresponding observation point. For both tests, it is necessary to set the quiet period working condition and the noisy period working condition. The vibration frequency range of the quiet period working condition is 1Hz~10Hz, and the vibration frequency range of the noisy period working condition is 10Hz~100Hz. By setting different working conditions, the measured results are closer to the actual situation and more valuable for reference.

[0055] In step S3, carrying out soil vibration simulation calculation may include the following steps:

[0056] Step S3-1: Determine corresponding parameters based on actual geological survey data, establish a soil analysis model for the proposed site, and set the boundary of the soil analysis model for the proposed site outside the surrounding roads of the proposed site;

[0057] Step S3-2: Perform finite element analysis on the soil analysis model of the proposed site to obtain vibration response simulation results and soil parameters.

[0058] In step S3-1, determining the corresponding parameters and establishing the soil analysis model of the proposed site may include the following:

[0059] 1) Reasonably determine the model size range;

[0060] In this embodiment, the Abaqus software is used to perform finite element analysis on the soil of the proposed site. It can be understood by those skilled in the art that the soil itself is a semi-infinite space body. In order to save calculation time in the actual modeling process, it is necessary to reasonably determine the surrounding range. For the calculation model under the general rail transit vibration source, the reasonable boundary should at least include the surrounding road range. At the same time, in order to facilitate the acquisition of the vibration transmission law between the vibration source and the building, the model size range in this embodiment is selected on the outside of the surrounding road of the proposed site. Since the attenuation of soil vibration in the thickness direction increases exponentially with increasing depth, according to the attenuation law of environmental vibration in the thickness direction of natural soil, it is determined by taking 1 times the wavelength of Rayleigh wave from the shear wave velocity of the soil layer and the site frequency.

[0061] 2) Determine the model boundary conditions;

[0062] In this embodiment, infinite elements are used at the model boundary to simulate the energy dissipation of the soil boundary. Those skilled in the art can understand that in order to avoid soil energy reflection caused by boundary truncation, infinite elements are used around the truncation range. Such elements provided by Abaqus can effectively solve the boundary reflection problem; and fixed boundary conditions are used at the bottom of the model. Since the thickness dimension value has been taken according to theoretical research, the reflection effect of this range on the bottom boundary is weak enough. Therefore, in actual application, the reflection effect of the bottom boundary of the model will not be considered.

[0063] 3) Input model parameters;

[0064] In this embodiment, the operator can determine the thickness of the soil layer of the proposed site, as well as parameters such as the dynamic elastic modulus and density of each layer based on actual geological survey data, and input the corresponding parameters into the model.

[0065] 4) Determine the damping value of the soil layer;

[0066] In this embodiment, the soil damping value can be calculated according to the site sweep frequency test results and the Rayleigh damping calculation method.

[0067] 5) Determine the unit size;

[0068] In this embodiment, the model unit size is determined according to 1 / 6 of the wavelength of the shear wave of the soil layer. Those skilled in the art will appreciate that the proposed site is usually large in scope, and the soil modeling range is about several hundred meters. If the grid is too dense, the calculation time will be too long and the cost will be too high; if the grid is too sparse, the calculation accuracy will be too poor, so the grid size needs to be reasonably selected. Based on a large amount of theoretical research, the grid unit size of the soil body is determined according to 1 / 6 of the wavelength of the shear wave of the soil layer, which can achieve reasonable accuracy without taking too long to calculate.

[0069] In step S3-2, it is also possible to determine whether the soil analysis model of the proposed site in step S3-1 is reasonable by comparing whether the calculated soil natural frequency is within a reasonable range. In this embodiment, the soil natural frequency is in the range of 3Hz to 10Hz. If the calculated soil natural frequency is not within the above range, it means that the parameters of the soil analysis model of the proposed site are unreasonable. The soil parameters in the input model can be adjusted to form an optimized soil analysis model of the proposed site, and the finite element analysis can be repeated until the obtained soil natural frequency is within the above range. Such a configuration further improves the accuracy of the vibration response simulation results and makes the soil analysis model of the proposed site more accurate.

[0070] In step S4, based on the vibration response measurement result and the vibration response simulation result, obtaining the correction coefficient may include the following steps:

[0071] Step S4-1: obtaining a vibration response simulation result at a position consistent with an observation point actually measured at the proposed site, and comparing the vibration response simulation result with the vibration response actually measured result;

[0072] Step S4-2: if the error between the vibration response simulation result and the vibration response measured result is greater than 25%, adjusting the preset soil parameters in the soil vibration simulation calculation within a preset range, and repeating the soil vibration simulation calculation until the error between the vibration response simulation result and the vibration response measured result is less than or equal to 25%;

[0073] Step S4-3: Based on the time history analysis results of the vibration response simulation results and the vibration response measured results, the peak ratio of the one-third octave band RMS curve is calculated, and the average of the ratios of each observation point is used as the correction coefficient.

[0074] It should be noted that in step S4-2, the threshold value of the error between the vibration response simulation result and the vibration response measured result is 25%. In other embodiments, those skilled in the art may increase or decrease the accuracy requirement according to the actual situation, and this embodiment does not limit this. In step S4-3, based on the vibration response simulation result and the vibration response measured result, the peak value of the one-third octave band RMS curve of each working condition and each observation point is calculated, wherein the peak point of the one-third octave band RMS curve is located near the natural frequency of the soil. If the peak point of the one-third octave band RMS curve is far away from the natural frequency of the soil, the preset soil parameters in the soil analysis model of the proposed site can be adjusted, and the finite element simulation can be re-performed so that the peak point of the one-third octave band RMS curve meets the requirements.

[0075] In step S5, conducting a wind tunnel test to obtain wind load excitation may include the following steps:

[0076] Step S5-1: Based on the actual shape of the proposed building, a wind tunnel test model is designed, and the tops of columns or the upper and lower chord nodes of trusses at the roof position of the wind tunnel test model are selected as wind vibration response observation points;

[0077] Step S5-2: Apply a wind load of once in ten years or once in one year to the wind tunnel test model to obtain wind load excitation.

[0078] It should be noted that in step S5-1, the size of the wind tunnel test model can be determined according to the Standard for Wind Tunnel Test Methods for Building Engineering JGJ / T 338-2014. In step S5-2, 15° is used as a load condition under a wind direction angle, and a total of 24 wind direction angles are obtained as the wind vibration corresponding result conditions as the finite element model time-history excitation load. Of course, in some other embodiments, other angles can also be used as load conditions under a wind direction angle, and those skilled in the art can configure this according to actual conditions, and this embodiment does not limit this.

[0079] In step S6, based on soil parameters, wind load excitation and correction coefficients, a soil-building interaction model is established, and simulation calculation is performed to obtain predicted vibration results, which may include the following steps:

[0080] Step S6-1: Establishing a soil model based on soil parameters;

[0081] Step S6-2: Establishing a ground structure-foundation model and forming a soil-building interaction model;

[0082] Step S6-3: Input the wind load excitation into the soil-building interaction model, determine the vibration observation points, and calculate the vibration response results of the building base under various working conditions;

[0083] Step S6-4: Based on the correction coefficient and the building floor vibration response result, a predicted vibration result is obtained. Specifically, the building floor vibration response result is multiplied by the correction coefficient to obtain the predicted vibration result.

[0084] It should be noted that in step S6-1, the technician can establish a soil model based on the soil parameters obtained in step S3, and the relevant parameters of the soil model are consistent with the model parameters and dimensions adjusted in step S3. In step S6-2, the soil and the structural raft are modeled as a whole, and the material parameters of different regions are defined by component segmentation to distinguish the soil and raft regions; the superstructure is modeled according to the structural design drawings, and the natural frequency of the superstructure is calculated separately to determine the Rayleigh damping of the superstructure; the superstructure and the foundation raft are rigidly connected; the pile foundation and the foundation raft are rigidly connected; the pile foundation and the soil are embedded in contact; the superstructure, foundation and soil all adopt elastic constitutive models. Those skilled in the art can understand that since the structural raft is buried in the soil in actual engineering, for buildings without basements, the top of the bottom plate is basically consistent with the ground elevation of the surrounding soil; the structural raft is modeled directly by dividing the soil components and defining the corresponding material parameters; this method assumes that the soil and the structural raft are a whole, because in micro-vibration design, it is almost impossible for the soil and the structure to be separated; therefore, this method is basically consistent with the stiffness using the contact boundary condition, and this method has little effect on the results. From the upper structure to the main structure, that is, the main beams, columns, and trusses, all components are rigidly connected; Abaqus is used to calculate the natural frequency of the structure, and the Rayleigh damping parameters of the structure are calculated according to the relevant formulas. In step S6-3, the wind load excitation of each working condition obtained in step S5-2 is input into the soil-building interaction model to determine and define the vibration observation points, thereby calculating the vibration response results of the building bottom plate under each working condition. In step S6-4, the RMS value within 10s is calculated according to the vibration response time history results of the target position under each wind load condition obtained in step S6-3; the RMS value within 10s is corrected according to the correction coefficient calculated in step S4, specifically, the RMS value within 10s is multiplied by the correction coefficient to obtain the predicted vibration result. In other embodiments, the process of correction using the correction coefficient can also be performed in other ways, such as using the fitted formula to realize the correction of the vibration result of a specific position.

[0085] In step S7, according to the predicted vibration result obtained in step S6-4, compared with the vibration control index, if the predicted vibration result is greater than the vibration control index, the preset target parameters in the soil-building interaction model in step S6-2 are continuously modified, and the finite element simulation is repeated until the predicted vibration result obtained by simulation is less than or equal to the vibration control index, and finally the target parameters that meet the vibration control index are obtained. It should be noted that the target parameters include: superstructure parameters and foundation parameters, wherein the superstructure parameters include: strength of the ground structure material, elastic modulus, and structural stiffness; the foundation parameters include: pile foundation density, pile foundation diameter, and pile foundation base plate range. Of course, in other embodiments, the target parameters may also be other reasonable parameters, which are not limited in this embodiment.

[0086] In summary, a parameter determination method in the design of wind-induced building micro-vibration control provided in an embodiment of the present invention includes: determining a vibration control index based on building functions and design requirements; conducting actual measurements of the proposed site to obtain actual vibration response results; conducting soil vibration simulation calculations to obtain vibration response simulation results and soil parameters; obtaining correction coefficients based on the actual vibration response results and the vibration response simulation results; conducting wind tunnel tests to obtain wind load excitation; establishing a soil-building interaction model based on soil parameters, wind load excitation and correction coefficients, and performing simulation calculations to obtain predicted vibration results; comparing the predicted vibration results with the vibration control index, and when the predicted vibration result is greater than the vibration control index, adjusting the target parameters of the soil-building interaction model, repeating the simulation calculations until the predicted vibration result is less than or equal to the vibration control index, and obtaining target parameters that meet the requirements.

[0087] With such a configuration, the corresponding correction coefficient is obtained by combining the actual measurement of the proposed site and the simulation calculation of soil vibration, and the wind load excitation is obtained through wind tunnel tests. Then, the soil-building interaction model is established for simulation calculation to obtain the predicted vibration results. Finally, the predicted vibration results and vibration control indicators are compared until the target parameters that meet the requirements are obtained. The combination of actual measurement and simulation improves the accuracy of the model; at the same time, when the predicted vibration results obtained do not meet the requirements, the corresponding parameters of the model are adjusted for optimization, and the simulation is repeated to ensure that the obtained parameters meet the requirements of the vibration control indicators; in addition, the parameter determination method provided in this application is combined with the structural design process, and reasonable vibration reduction measures can be proposed in the early stage of building construction, saving materials, construction period and other costs; and by simultaneously optimizing the relevant parameters of the superstructure and foundation, the vibration reduction efficiency is maximized, thereby further reducing the material cost related to the vibration reduction control measures;

[0088] Furthermore, by comparing the vibration response simulation results with the vibration response measured results, when the error between the two is greater than a preset range, the preset soil parameters in the soil analysis model of the proposed site are readjusted, and the simulation is performed again until the error is less than the preset range, thereby further improving the accuracy of the soil analysis model of the proposed site and making it closer to the actual soil performance of the proposed site;

[0089] Furthermore, by controlling the peak point of the one-third octave band RMS curve to be located at the natural frequency of the soil, and the natural frequency of the soil is in the range of 3 Hz to 10 Hz, the accuracy of the vibration response simulation results is further improved, and the soil analysis model of the proposed site is made more accurate.

[0090] The above description is only a description of the preferred embodiments of the present invention, and is not intended to limit the scope of the present invention. Any changes or modifications made by a person skilled in the art in the field of the present invention based on the above disclosure shall fall within the scope of protection of the claims.

Claims

1. A method for determining parameters in the design of wind-induced micro-vibration control of buildings, characterized in that: include: Determine vibration control indicators based on building functions and design requirements; Conduct field measurements on the proposed site and obtain the vibration response measurement results; Carry out soil vibration simulation calculation to obtain vibration response simulation results and soil parameters; Obtaining a correction coefficient based on the vibration response measured result and the vibration response simulation result; Conduct wind tunnel tests to obtain wind load excitation; Based on the soil parameters, the wind load excitation and the correction coefficient, a soil-building interaction model is established, and simulation calculation is performed to obtain predicted vibration results; The predicted vibration result and the vibration control index are compared. When the predicted vibration result is greater than the vibration control index, the target parameters of the soil-building interaction model are adjusted, and the simulation calculation is repeated until the predicted vibration result is less than or equal to the vibration control index, and the target parameters that meet the requirements are obtained.

2. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 1, characterized in that: The proposed site measurement is carried out to obtain vibration response measurement results, including: At least two observation points are arranged in the proposed site, different test conditions are set based on the surrounding road conditions of the proposed site, and the vibration response measurement results at different observation points are obtained.

3. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 2, characterized in that: The observation points are arranged at the control point of the proposed building, at the peripheral roads of the proposed site, at the proposed building and / or between the peripheral roads of the proposed site and the proposed building.

4. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 1, characterized in that: The soil vibration simulation calculation is performed to obtain vibration response simulation results and soil parameters, including: Determine corresponding parameters based on actual geological survey data, establish a soil analysis model for the proposed site, and set the boundary of the soil analysis model for the proposed site outside the surrounding roads of the proposed site; Finite element analysis is performed on the soil analysis model of the proposed site to obtain the vibration response simulation results and the soil parameters.

5. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 1, characterized in that: The obtaining of the correction coefficient based on the vibration response measured result and the vibration response simulation result includes: Acquire the vibration response simulation result at a position consistent with the observation point actually measured at the proposed site, and compare the vibration response simulation result with the vibration response actually measured result; If the error between the vibration response simulation result and the vibration response measured result is greater than 25%, adjusting the preset soil parameters in the soil vibration simulation calculation within a preset range, and repeating the soil vibration simulation calculation until the error between the vibration response simulation result and the vibration response measured result is less than or equal to 25%; Based on the time history analysis results of the vibration response simulation results and the vibration response measured results, the peak ratio of the one-third octave band RMS curve is calculated, and the average of the ratios of each observation point is used as the correction coefficient.

6. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 5, characterized in that: The peak point of the one-third octave band RMS curve is located at the soil natural frequency, and the soil natural frequency is in the range of 3 Hz to 10 Hz.

7. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 1, characterized in that: The wind tunnel test is carried out to obtain wind load excitation, including: Based on the actual shape of the proposed building, a wind tunnel test model is designed, and the tops of the columns or the upper and lower chord nodes of the trusses at the roof position of the wind tunnel test model are selected as wind vibration response observation points; A wind load that returns once in ten years or once in a year is applied to the wind tunnel test model to obtain the wind load excitation.

8. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 1, characterized in that: The soil-building interaction model is established based on soil parameters, wind load excitation and correction coefficient, and simulation calculation is performed to obtain predicted vibration results, including: Based on the soil parameters, a soil model is established; Establishing an above-ground structure-foundation model and forming the soil-building interaction model; Inputting the wind load excitation into the soil-building interaction model, determining the vibration observation points, and calculating the vibration response results of the building base plate under various working conditions; The predicted vibration result is obtained based on the correction coefficient and the building base plate vibration response result.

9. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 8, characterized in that: The step of obtaining the predicted vibration result based on the correction coefficient and the vibration response result of the building base plate includes: The building base plate vibration response result is multiplied by the correction coefficient to obtain the predicted vibration result.

10. The method for determining parameters in the design of wind-induced building micro-vibration control as claimed in claim 1, characterized in that: The target parameters include: strength of the ground structure material, elastic modulus, structural stiffness, pile foundation density, pile foundation diameter and pile foundation base plate range.

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