Stochastic modelling of traffic-induced building vibration

Xu, You Lin; Hong, Xiao

doi:10.1016/j.jsv.2007.11.031

Cited by 32 publications

(19 citation statements)

References 15 publications

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“…where COORDS (2) is an array containing the Y coordinates of the load integration point; the direction of Y axis is perpendicular to the traffic direction; Y 0 is initial coordinate Y value of load; abs(X) ≤ (b/2) defines the length of the loading area; abs(Y) ≤ (c/2) defines the width of the loading area; a is the ratio of load amplitude, which is set as 1 for R3, 0.9 for R2 and R4, and 0.5 for R1 and R5; b is the length of the load distribution along the traffic direction, which is set as 18 cm for R3, 16 cm for R1, R2, R4, and R5; c is the width of the load distribution perpendicular to the traffic direction, which is set as 3 cm for each rib; S is the actual contact area that is the sum of the areas from R1 to R5; P(t) is the set of the surface pressure on the load integration point at TIME(1); and F(t) is the random load produced by the quarter vehicle model at TIME (1). e random nonuniform moving load is achieved by (9) and (11). e vehicle speed was set as 10 m/s, and the length of loading area was set as 3 m. erefore, the total time period was 0.3 s. e increment time was set as 0.001 s, which was consistent with the sampling frequency (1000 Hz) of stochastic load.…”

Section: Moving Loadmentioning

confidence: 99%

“…Ju [10] developed a finite element (FE) model to investigate the characteristics of the building vibrations induced by adjacent moving trucks. Xu and Hong [11] investigated the effects of both a single heavy truck flow and a two-way traffic flow on building vibration. e results showed that traffic-induced ground vibrations disrupted high-tech facilities.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the Pavement Vibration Response for Roadway Service Condition Evaluation

Wang

2018

Advances in Civil Engineering

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Dynamic response of pavement provides service condition information and helps with damage prediction, while limited research is available with the simulation of pavement vibration response for evaluating roadway service condition. This paper presents a numerical model for the analysis of the pavement vibration due to the dynamic load created by a passing vehicle. A quarter vehicle model was used for the determination of the vehicle moving load. Both random and spatial characteristics of the load were considered. The random nonuniform moving load was then introduced in a 3D finite element model for the determination of the traffic-induced pavement vibration. The validated numerical model was used to assess the effects of dynamic load, material properties, and pavement structures on pavement vibration response. Numerical analyses showed that the vibration modes changed considerably for the different roadway service conditions. The vibration signals reflect the level of road roughness, the stiffness of the pavement materials, and the integrity of pavement structure. The acceleration extrema, the time-domain signal waveform, the frequency distribution, and the sum of squares of Fourier amplitude can be potential indexes for evaluating roadway service condition. This provides recommendations for the application of pavement vibration response in early-warning and timely maintenance of road.

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Section: Moving Loadmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating the Pavement Vibration Response for Roadway Service Condition Evaluation

Wang

2018

Advances in Civil Engineering

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“…Three-dimensional traffic-induced ground motions generated with the method in [10] are used in this section to examine the functionality of high-tech equipments with vibration control of the proposed hybrid platform. The parameters for the hydraulic actuators proposed by Dyke et al [15] are adopted in this study: = 2.5; A/k q = 0.15; Ak q /k c = 25; V /(2 k c ) = 0.015.…”

Section: Microvibration Control With Hybrid Platformmentioning

confidence: 99%

“…For example, the significant mass eccentricity due to additional high-tech equipment may cause torsional vibration of buildings during earthquakes [9]. Moreover, Hong and Xu [10] studied the ground motions induced by nearby roadway traffic, which involves the effect of both Raleigh wave and body wave, and the results reveal that the floor vibration level of high-tech buildings may surpass the allowable tolerance specified by ultra-precision industry in all three directions (x-, y-and z-directions). Thereby, a three-dimensional model of coupled platformbuilding system under three-dimensional ground motion excitations is necessary to examine the practicality and effectiveness of vibration control scheme in all three directions.…”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional vibration control of high‐tech facilities against earthquakes and microvibration using hybrid platform

Hong

Zhu

2009

Earthq Engng Struct Dyn

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High-tech equipments engaged in the production of ultra-precision products have very stringent vibration criteria for their functionality in normal operation conditions and their safety during an earthquake. Most previous investigations were based on simplified planar models of building structures, despite the fact that real ground motions and structures are always three-dimensional. This paper hence presents a threedimensional analytical study of a hybrid platform on which high-tech equipments are mounted for their vibration mitigation. The design methodology of the hybrid platform proposed in this study is based on dual-level performance objectives for high-tech equipments: safety against seismic hazard and functionality against traffic-induced microvibration. The passive devices (represented by springs and viscous dampers) and the active actuators are designed, respectively, to meet vibration criteria corresponding to safety level and functionality level. A prototype three-story building with high-tech equipments installed on the second floor is selected in the case study to evaluate the effectiveness of the hybrid platform. The optimal location of the platform on the second building floor is determined during the design procedure in terms of the minimal H 2 cost function of absolute velocity response. The simulation of the coupled actuator-platformbuilding system subjected to three-dimensional ground motions indicates that the optimally designed hybrid platform can well achieve the dual target performance and effectively mitigate vibration at both ground motion levels.

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“…A technical review of the microvibration sources, criteria, measurements, and mitigations can be found in reference [3]. Over the last two decades, micro-vibration has been intensively studied in concerns of human comfort and production yield for office buildings, biotechnology or metrology labs, and semiconductor fabs [4][5][6][7][8][9][10][11][12][13][14][15][16]. Vibration control for sensitive equipment by using isolation devices or active control systems [14][15][16][17][18][19][20][21][22][23][24][25] has also been widely explored.…”

Section: Introductionmentioning

confidence: 99%

A study on AGV-induced floor micro-vibration in TFT-LCD high-technology fabs

Lee

Wang

2011

Struct. Control Health Monit.

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SUMMARY This study explores vertical floor micro‐vibration induced by the automated guided vehicles (AGVs) in thin‐film‐transistor liquid‐crystal‐display (TFT‐LCD) fabs. The state‐space procedure is adopted to compute the AGV‐induced floor vibration as it preserves the desired numerical stability and accuracy in high‐frequency responses. The dynamic analysis of an AGV moving on an equivalent three‐span beam model of a TFT‐LCD building is simulated by taking into account various AGV speeds and engine forces. Numerical simulations demonstrate that if proper engine forces and excitation frequency contents of the AGV moving loads are used, the peak AGV‐induced floor micro‐vibration level can be predicted by the proposed method. Moreover, the effectiveness of vibration control by span‐reduction as well as energy‐dissipation by viscoelastic dampers is also examined. In comparison with span‐reduction, application of energy‐dissipation devices is more effective in vibration suppression as they enhance the damping characteristics of the multi‐span floor system whose natural frequencies are potentially in resonance with the excitation frequencies of the AGV moving loads ranging in a broad bandwidth. Copyright © 2011 John Wiley & Sons, Ltd.

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Stochastic modelling of traffic-induced building vibration

Cited by 32 publications

References 15 publications

Investigating the Pavement Vibration Response for Roadway Service Condition Evaluation

Investigating the Pavement Vibration Response for Roadway Service Condition Evaluation

Three‐dimensional vibration control of high‐tech facilities against earthquakes and microvibration using hybrid platform

A study on AGV-induced floor micro-vibration in TFT-LCD high-technology fabs

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