Simplified theoretical treatment of lateral structural properties under crowd excitation

Dong, Yun; Gao, Yan An; Zhu, Yan; Zhang, Peng

doi:10.21595/mme.2018.20177

Cited by 1 publication

(1 citation statement)

References 21 publications

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“…Even later, Yang and Gao [10] studied the lateral vibrational mechanism of footbridge under a bipedal walking robot with a lump mass and two massless spring-damping legs. Later, a simplified theory for structural vibration was proposed based on the assumptions of uniform distribution and synchronized walking of pedestrians [11], which has been used to describe the effect of the change in crowd size on lateral structural damping and the frequency of the structure. Although the lateral vibration of footbridge under walking pedestrian has comprehensively studied, the mechanism of alleviating vibration of structure under bipedal walking is rare explored.…”

Section: Introductionmentioning

confidence: 99%

Pedestrian traffic induced lateral vibration including the effect of TMD

Gao¹,

Zhang²,

Namdar³

et al. 2019

Math. models, eng.

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This study explores the dynamic behavior of beam induced by bipedal pedestrian traffic and corresponding vibration reducing method by tuned mass damper. Each pedestrian from motion crowd simplifies as a bipedal robot comprised of a lump mass and two massless spring-damping legs. In addition, the tuned mass dampers are installed on the bottom of structure to relieving the vibration of structure. The interactions among pedestrians, tuned mass dampers and structure are considered to establish a governing equation. Research indicates that both the tuned mass damper and pedestrian evidently alter the structural properties of the structure by affecting its frequency and damping capacity. The structure tends to be gently flexible at a lower frequency as pedestrian walk across its surface, but the corresponding damping capacity of the structure is improved. The tuned mass damper always improves both the vibration response and dynamic properties of structure. However, its self-dynamic characteristics of the tuned mass damper tend to deteriorate. The tuned mass damper relieves effectively the lateral vibration in a slender structure than the rigid structure. The change in the mass ratio of tuned mass damper to structure affects significantly the dynamic behaviors of structure. In addition, the layouts of the tuned mass dampers on structure also have remarkable influences on the behaviors. The results of this study provide potential pathways for understanding the vibratory mechanisms of slender structures such as footbridges, grandstands, or stations under crowd excitations.

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Section: Introductionmentioning

confidence: 99%