Study on vertical vibration control of long-span steel footbridge with tuned mass dampers under pedestrian excitation

Wang, Dayang; Wu, Chengqing; Zhang, Yongshan; Li, Shangwei

doi:10.1016/j.jcsr.2018.11.021

Cited by 33 publications

(19 citation statements)

References 20 publications

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“…A correlation of finite element method (FEM) solutions with measured dynamic properties as well as the structural health monitoring (SHM) of footbridges are other significant aspects of this type of structure. In paper [27], an experimental modal model was used for the validation of an FE model of the investigated structure. This approach made it possible to predict the reliable influence of the tuned mass dampers for the dynamic serviceability of the footbridge under pedestrian excitation, which was the main purpose of the analysis [27].…”

Section: Related Workmentioning

confidence: 99%

“…In paper [27], an experimental modal model was used for the validation of an FE model of the investigated structure. This approach made it possible to predict the reliable influence of the tuned mass dampers for the dynamic serviceability of the footbridge under pedestrian excitation, which was the main purpose of the analysis [27]. Vibration-based monitoring is also an efficient tool which is used for SHM procedures.…”

Section: Related Workmentioning

confidence: 99%

“…Taking into consideration the primary function of the pedestrian bridges, the risk of the resonance phenomenon occurring has to be discussed for this type of structure [11][12][13][14][15][16][17][18][19][20][21][22][23][24]. In general, the estimation of the modal properties of footbridges is the main component of the general dynamic evaluation of these structures [25][26][27][28]. It must be pointed out that this part of the dynamic investigation has significant value for the design stage of construction as well as being required prior to approval of the structure for public usage, i.e., proof load testing (conduct in order to validate that a structure can carry the design loads) and acceptance tests (conducted before a bridge structure is accepted for exploitation).…”

Section: Introductionmentioning

confidence: 99%

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Full-Scale Experimental and Numerical Investigations on the Modal Parameters of a Single-Span Steel-Frame Footbridge

Drygala

Dulińska

2019

Symmetry

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In this work, an examination on the modal properties of a single-span steel-frame footbridge is presented. The footbridge is situated in Jawornik (Lesser Poland). The footbridge is symmetrical since its main structure consists of two steel frames of the same shape. The boundary conditions for both frames are the same as well. The study was completed on the basis of numerical as well as experimental investigations. For finite element (FE) analysis, a 3-D model of the single-span steel-frame footbridge was created. For the experimental study, a research scheme for in situ tests was developed. Three kinds of excitation techniques were used during the in situ tests: shock excitation, operational vibration, and slow sine sweep testing. Different functions that estimate natural frequencies, i.e., the power spectral density function (PSD) and the frequency response function (FRF), were applied. The modal assurance criterion (MAC) was used as a mathematical tool for the verification of the mode shapes of natural vibrations obtained in experimental and numerical ways. Good compatibility was recognized between the results obtained for experimental and numerical procedures in terms of both the natural frequency and the mode of vibration. The identified and verified values of the five consecutive natural frequencies of the footbridge were smaller than 5 Hz, but they were recognized as being located outside the frequency range defined as having “maximum risk of resonance". The numerical and experimental modal analysis revealed that all modes corresponding to the natural frequencies from the 0–5 Hz range have both a symmetrical and an anti-symmetrical nature. In particular, the first vertical mode, which can play a central role from the serviceability of the footbridge point of view has a symmetrical shape. The results of the research might be applicable to the dynamic study of the structure type considered in the analysis, i.e., for the dynamic assessment of a single-span steel-frame footbridge with a relatively large mass as well as stiffness. The investigation proved that ambient vibration modal experiments are enough for the experimental investigation of the modal properties of the structure.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Full-Scale Experimental and Numerical Investigations on the Modal Parameters of a Single-Span Steel-Frame Footbridge

Drygala

Dulińska

2019

Symmetry

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“…Because of the beautiful architectural appearance, short construction period and high economy, slender steel footbridges became more and more popular than before and were common in urban areas [1][2][3][4][5][6][7][8]. With the development of high-performance materials, footbridges became slenderer and lighter [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, Li et al [6] proposed a numerical study of vibration control of a large-span pedestrian suspension bridge using an MTMD system. Wang et al [7] presented the vertical human-induced vibration control of a long-span steel footbridge using TMDs. Though they are both important contributions, however, the detail parametric study and optimal design method are absent in these two references.…”

Section: Introductionmentioning

confidence: 99%

Optimal Design and Application of a Multiple Tuned Mass Damper System for an In-Service Footbridge

Wang

Shi

2019

Sustainability

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Slender steel footbridges suffer excessive human-induced vibrations due to their low damping nature and their frequency being located in the range of human-induced excitations. Tuned mass dampers (TMDs) are usually used to solve the serviceability problem of footbridges. A multiple TMD (MTMD) system, which consists of several TMDs with different frequencies, has a wide application in the vibration control of footbridges. An MTMD system with well-designed parameters will have a satisfactory effect for vibration control. This study firstly discusses the relationship between the acceleration dynamic amplification factor and important parameters of an MTMD system, i.e., the frequency bandwidth, TMD damping ratio, central frequency ratio, mass ratio and the number of TMDs. Then, the frequency bandwidth and damping ratio optimal formulas are proposed according to the parametric study. At last, an in-service slender footbridge is proposed as a case study. The footbridge is analyzed through a finite element model and an in situ test, and then, an MTMD system is designed based on the proposed optimal design formulas. The vibration control effect of the MTMD system is verified through a series of in situ comparison tests. Results show that under walking, running and jumping excitations with different frequency, the MTMD system always has an excellent vibration control effect. Under a crowd-induced excitation with the resonance frequency, the footbridge with an MTMD system can meet the acceleration limit requirement. It is also found that the analysis result agrees well with the in situ test.

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Reducing human‐induced vibration of cross‐laminated timber floor—Application of multi‐tuned mass damper system

Huang

Chang

2020

Struct Control Health Monit

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Study on vertical vibration control of long-span steel footbridge with tuned mass dampers under pedestrian excitation

Cited by 33 publications

References 20 publications

Full-Scale Experimental and Numerical Investigations on the Modal Parameters of a Single-Span Steel-Frame Footbridge

Full-Scale Experimental and Numerical Investigations on the Modal Parameters of a Single-Span Steel-Frame Footbridge

Optimal Design and Application of a Multiple Tuned Mass Damper System for an In-Service Footbridge

Reducing human‐induced vibration of cross‐laminated timber floor—Application of multi‐tuned mass damper system

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