CN102680078B - Three-dimensional frequency-domain analysis method for adjacent construction vibration caused by metro traffic - Google Patents
Three-dimensional frequency-domain analysis method for adjacent construction vibration caused by metro traffic Download PDFInfo
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Abstract
The invention provides a three-dimensional frequency-domain analysis method for adjacent construction vibration caused by metro traffic. The three-dimensional frequency-domain analysis method comprises the following steps of: step 1, actually measuring a vibration acceleration of a track bed of a metro tunnel in situ; step 2, establishing a track bed-tunnel liner-ground layer-construction structure three-dimensional calculation model; step 3, calculating a transmission function of construction vibration caused when a unit simple harmonic load acts on the track bed of the metro tunnel at different frequencies; step 4, acquiring acceleration time intervals and vibration grades of a plurality of samples of a building by using a frequency domain-time domain conversion analysis method based on the track bed vibration acceleration which is actually measured in the step 1 as an excitation load; and step 5, analyzing and comparing a vibration grade calculation result and a control standard. The analysis method provided by the invention provides an optional estimation method for forecasting the adjacent construction vibration caused by the metro traffic, so that an analyzing and comparing method is provided for analyzing and estimating various vibration reduction measurements.
Description
Technical field
The present invention relates to field of civil engineering, it is mainly the develop rapidly for city underground track traffic in recent years, the ambient vibration that subway transportation causes is outwards propagated by stratum around, caused the secondary vibration of Adjacent Buildings, normal work of the mankind's work living environment and precision apparatus etc. has been produced to very large impact.The present invention proposes alternative analytical approach that a kind of subway transportation causes adjacent building vibration.
Background technology
Along with the development of urban construction modernization and the increase day by day of city size, the ambient vibration that the various mankind's activities such as surface road traffic and subway, engineering construction and millwork operation produce is on the rise, these ambient vibrations are outwards propagated by stratum, caused the secondary vibration of Adjacent Buildings, normal work of the mankind's work living environment, precision apparatus etc. has been produced to very large impact.Ambient vibration is classified as to one of seven overall situation public hazards to the impact of buildings in the world.As Japanese Tokyo, the big cities such as Beijing, Shanghai and Guangzhou of China, surface road traffic and Underground Rail Transit net are day by day intensive, from the distance of buildings more and more close to, add the continuous increase of traffic density, the ambient vibration problem that traffic loading is caused is day by day serious.Only, with regard to current Shanghai, along with increasing of subway line, underground reticulate texture becomes increasingly complex.Subway as public bus network master pulse, area-covered certainly will be dense population areas, subway inevitably will navigate within bulilt-up area, thereby it is day by day serious on the impact of surrounding enviroment, as Xizhimen, Beijing to Summer Palace Light Rail Rapid Transit system may produce vibration effect etc. near culture and scientific research institution.
In addition, people are also more and more higher to the requirement of quality of life, even the vibration of same degree may not be problem in the past, and caused more and more the public's kickback now.The control of these vibration of building that all road traffic and Underground Rail Transit cause has over the ground proposed new requirement, has caused countries in the world researchists' great attention.
The vibration of building causing due to subway transportation is subject to the impact of many factors, it is a very complicated Vibration propagation process, from railcar self vibration, to underground railway track, tunnel railway roadbed, tunnel structure, DRIFT AND SEPARATION-PILE condition, building foundation and superstructure, how comparatively reasonably to estimate vibration of building that subway transportation draws and be one quite difficulty and urgent problem.
Summary of the invention
The present invention proposes the adjacent building that a kind of subway transportation causes and vibrates three-dimensional frequency-domain analysis method, thereby the close to buildings vibration causing for prediction subway transportation provides a kind of new analytical approach.
In order to achieve the above object, the present invention proposes the adjacent building that a kind of subway transportation based on field measurement railway roadbed acceleration causes and vibrates three-dimensional frequency-domain analysis method, is applied to estimate the vibration of the close to buildings that subway transportation causes, it comprises the following steps:
First stage: field measurement subway tunnel ballast bed vibration acceleration;
Subordinate phase: set up railway roadbed-tunnel-liner-stratum-building structure three-dimensional computations model;
Phase III: when the unit Simple Harmonic Load of calculating different frequency acts on tunnel railway roadbed, the transport function of the vibration of building causing;
Fourth stage: using the ballast bed vibration acceleration of first stage actual measurement as excitation load, adopt the analytical approach of frequency domain-time domain conversion, try to achieve the acceleration time-histories of buildings multisample and the level of shaking.
Five-stage: vibration level meter is calculated to result and control criterion and analyze relatively.
The present invention proposes the adjacent building that a kind of subway transportation causes and vibrates three-dimensional frequency-domain analysis method, and in conjunction with the control criterion of relevant vibration of building, the vicinity causing for prediction subway transportation is built thing vibration provides a kind of analytical approach.
Accompanying drawing explanation
Figure 1 shows that the adjacent building that the subway transportation of preferred embodiment of the present invention causes vibrates three-dimensional frequency-domain analysis method process flow diagram.
Figure 2 shows that the subway tunnel ballast bed vibration acceleration field measurement schematic diagram of preferred embodiment of the present invention;
Figure 3 shows that railway roadbed-tunnel-liner-stratum-building structure three-dimensional computations model schematic diagram of preferred embodiment of the present invention.
The frequency-domain calculations that Figure 4 shows that preferred embodiment of the present invention is analyzed block diagram.
The implication of each label in Fig. 2: 1, railway roadbed, 2, tunnel-liner, 3, stratum, 4, track, 5, acceleration transducer.Fig. 2 is only schematic diagram, especially stratum is intercepted, and does not represent the thickness of actual formation and the range of horizontal direction.
Embodiment
In order more to understand technology contents of the present invention, especially exemplified by specific embodiment and coordinate appended graphic being described as follows.
The present invention proposes the adjacent building that a kind of subway transportation based on field measurement railway roadbed acceleration causes and vibrates three-dimensional frequency-domain analysis method, thereby the close to buildings vibration causing for prediction subway transportation provides a kind of predictor method of practicality.It comprises the following steps:
First stage S1: field measurement subway tunnel ballast bed vibration acceleration;
Subordinate phase S2: set up railway roadbed-tunnel-liner-stratum-building structure three-dimensional computations model;
Subordinate phase S3: when the unit Simple Harmonic Load of calculating different frequency acts on tunnel railway roadbed, the transport function of the vibration of building causing;
Fourth stage S4: using the ballast bed vibration acceleration of first stage actual measurement as excitation load, adopt the analytical approach of frequency domain-time domain conversion, try to achieve the acceleration time-histories of buildings multisample and the level of shaking.
Five-stage S5: vibration level meter is calculated to result and control criterion and analyze relatively.
To respectively each stage be described in detail below.
First stage S1: field measurement subway tunnel ballast bed vibration acceleration.
As shown in Figure 2, on railway roadbed 1, arrange a plurality of acceleration transducers 5, by field measurement, determine the vibration acceleration of subgrade of metro
as the excitation load of numerical simulation, guaranteed the reliability of excitation load.This is different from the train excitation load that adopts Train Track-railway roadbed model to calculate in conventional art, and the method that the present invention proposes has been guaranteed the consistance of train excitation load and actual conditions.
Subordinate phase S2: set up railway roadbed-tunnel-liner-stratum-building structure three-dimensional computations model.
As shown in Figure 3, choose exemplary position, set up the three-dimensional computations model of railway roadbed 20-tunnel-liner 2-stratum 3-building structure 7.Understandable, under different occasions, building structure and the discrepant level of railway roadbed tool and height distance.Accordingly, according to the difference of occasion, stratum 3 to be analyzed has different thickness and range.Stratum 3 adopts layered soil model, in figure, with different gray scales, represent the different layers of ground, in addition, different according to the influence degree of the 3 pairs of buildingss 7 in diverse location stratum, only the stratum 3 of necessary effective coverage is analyzed, i.e. the finite element region 31 at the middle part in figure, model boundary adopts infinite element to process, i.e. soil layer neighboring area 32 and bottom section 33 in figure, the problem that while having avoided adopting finite element analogy semi-infinite foundation medium, bring on manual intercept border.Building structure 7 is set up stratified model according to the nature layer of himself equally.
About how carrying out the finite element on stratum 3 and the division in infinite element region, can also at subway, cause the application > > in analysis of Environment Vibration with reference to the < < underground space and the paper < < infinite element border of engineering journal > > S1 phase in 2011.
Phase III S3: when the unit Simple Harmonic Load of calculating different frequency acts on tunnel railway roadbed, the transport function of the vibration of building causing.
According to the three-dimensional computations model shown in Fig. 3, the transfer function H of arbitrfary point vibration on buildings when the unit Simple Harmonic Load 6 that can be ω by humorous analysis calculated rate acts on railway roadbed 20 surperficial
xyz(ω), in formula, x, y, z is for locating a certain coordinate position at model to be analyzed on buildings, and the direction of x, y, z as shown in the figure.Or also available axial coordinate is located this point, the present embodiment does not limit this.Humorous analysis has been proven technique, and it is not this patent emphasis, therefore repeats no more.
Fourth stage S4: using the ballast bed vibration acceleration of first stage actual measurement as excitation load, adopt the analytical approach of frequency domain-time domain conversion, try to achieve the acceleration time-histories of buildings multisample and the level of shaking.
The transport function obtaining according to phase III S3, using the ballast bed vibration acceleration of first stage actual measurement as excitation load, adopts the analytical approach of frequency domain-time domain conversion, tries to achieve the acceleration time-histories of building floor multisample and the level of shaking.
Described fourth stage is on the basis of phase III, by the ballast bed vibration acceleration of first stage actual measurement
as excitation load, adopt the analytical approach of frequency domain-time domain conversion, try to achieve the vibration time-histories of buildings multisample
with the level of shaking, obtain the Vibration Condition of buildings, computing formula is suc as formula shown in (1), and block diagram is as shown in Figure 4; The analytical approach that adopts the conversion of frequency domain-time domain, the wide frequency range that can consider, is applicable to carrying out the sunykatuib analysis of great amount of samples input, can increase substantially counting yield; Calculate and adopt structural damping (complex damping), guaranteed the frequency-independent of damping ratio, the error of calculation of having avoided other damper model to bring.
In formula:
Five-stage S5: vibration level meter is calculated to result and control criterion and analyze relatively.
If do not meet vibration standard, need to take effective vibration reducing measure to reduce building vibration.The simplification analytical approach that can adopt the present invention to propose, carries out the analysis comparison of different vibration reducing measures.
In sum, the present invention proposes the adjacent building that a kind of subway transportation causes and vibrates three-dimensional frequency-domain analysis method, control criterion in conjunction with relevant vibration of building, the close to buildings vibration causing for prediction subway transportation provides a kind of predictor method of practicality, thereby provides a kind of analytical approach for the various vibration reducing measure of assay.
Although the present invention discloses as above with preferred embodiment, so it is not in order to limit the present invention.Persond having ordinary knowledge in the technical field of the present invention, without departing from the spirit and scope of the present invention, when being used for a variety of modifications and variations.Therefore, protection scope of the present invention is when being as the criterion depending on claims person of defining.
Claims (6)
1. the adjacent building that subway transportation causes vibrates a three-dimensional frequency-domain analysis method, is applied to estimate the vibration of the close to buildings that subway transportation causes, it is characterized in that comprising the following steps:
First stage: field measurement subway tunnel ballast bed vibration acceleration;
Subordinate phase: set up railway roadbed-tunnel-liner-stratum-building structure three-dimensional computations model;
Phase III: when the unit Simple Harmonic Load of calculating different frequency acts on tunnel railway roadbed, the transport function of the vibration of building causing;
Fourth stage: using the ballast bed vibration acceleration of first stage actual measurement as excitation load, adopt the analytical approach of frequency domain-time domain conversion, try to achieve the acceleration time-histories of buildings multisample and the level of shaking;
Five-stage: vibration level meter is calculated to result and control criterion and analyze relatively.
2. method according to claim 1, is characterized in that in the first stage, arranged a plurality of acceleration transducers on railway roadbed.
3. method according to claim 1, is characterized in that in described subordinate phase, and stratum adopts layered soil model.
4. method according to claim 1, is characterized in that, in described subordinate phase, only the stratum in finite element region being analyzed, and the border on model stratum adopts infinite element to process.
5. method according to claim 1, is characterized in that in described subordinate phase, and building structure adopts stratified model.
6. method according to claim 1, is characterized in that in the described phase III, while adopting the unit Simple Harmonic Load of humorous analytical calculation different frequency to act on tunnel railway roadbed, and the transport function of the vibration of building causing.
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| CN108268680B (en) * | 2016-12-30 | 2021-10-22 | 中国机械工业集团有限公司 | Multi-defense line concept design method for building structure vibration control |
| CN112414655A (en) * | 2020-10-23 | 2021-02-26 | 中信国安建工集团有限公司 | Detection device and detection method for reflecting influence of subway operation on building construction safety |
| CN112834018B (en) * | 2020-12-18 | 2022-11-04 | 哈尔滨工大正元信息技术有限公司 | Detection method of working state of navigation aid lamp, storage medium and electronic equipment |
| CN115262664B (en) * | 2022-07-18 | 2023-06-20 | 中煤江南建设发展集团有限公司 | Subway passing near-field engineering pile monitoring device and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1142047A (en) * | 1995-07-27 | 1997-02-05 | 财团法人铁道总合技术研究所 | Method for defining destructive degree of building destructed from earthquake and instrument thereof |
| CN101221066A (en) * | 2008-01-25 | 2008-07-16 | 太原理工大学 | Engineering nonlinear vibration detecting method |
| CN102147322A (en) * | 2011-01-13 | 2011-08-10 | 北京工业大学 | Multidimensional and multipoint anti-seismic experimental method for considering soil-structure interaction |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1142047A (en) * | 1995-07-27 | 1997-02-05 | 财团法人铁道总合技术研究所 | Method for defining destructive degree of building destructed from earthquake and instrument thereof |
| CN101221066A (en) * | 2008-01-25 | 2008-07-16 | 太原理工大学 | Engineering nonlinear vibration detecting method |
| CN102147322A (en) * | 2011-01-13 | 2011-08-10 | 北京工业大学 | Multidimensional and multipoint anti-seismic experimental method for considering soil-structure interaction |
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