Vibration performance of arch prestressed concrete truss girder under impulse excitation

Liang Cao, Jiepeng Liu, Yohchia F. Chen

Research output: Contribution to journalArticle

Abstract

In this study, laboratory testing and theoretical analysis were carried out to investigate the human-induced vibration issues for a relatively new structural form, i.e. the arch prestressed concrete truss (APT) girder system. Ambient vibration was performed on the APT girder to capture its natural frequencies, damping ratios, and mode shapes. The APT girder system possesses high frequency and low damping. Heel-drop and jumping impact excited by a single person and dual persons were considered to evaluate the vibration performance and peak acceleration distributions for the APT girder system. The mid-span of the APT girder was selected as the key location for the vibration evaluation. It is found that the additional tester contributes to the acceleration attenuation. A reasonable shape function for the APT girder was proposed. The validity for the fundamental natural frequency was verified. The theoretical accelerations determined by the modal decomposition method with the proposed shape function agree generally well with the test results.

Original languageEnglish (US)
Pages (from-to)386-395
Number of pages10
JournalEngineering Structures
Volume165
DOIs
StatePublished - Jun 15 2018

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Prestressed concrete
Arches
Natural frequencies
Damping
Forms (concrete)
Decomposition
Testing

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering

Cite this

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title = "Vibration performance of arch prestressed concrete truss girder under impulse excitation",
abstract = "In this study, laboratory testing and theoretical analysis were carried out to investigate the human-induced vibration issues for a relatively new structural form, i.e. the arch prestressed concrete truss (APT) girder system. Ambient vibration was performed on the APT girder to capture its natural frequencies, damping ratios, and mode shapes. The APT girder system possesses high frequency and low damping. Heel-drop and jumping impact excited by a single person and dual persons were considered to evaluate the vibration performance and peak acceleration distributions for the APT girder system. The mid-span of the APT girder was selected as the key location for the vibration evaluation. It is found that the additional tester contributes to the acceleration attenuation. A reasonable shape function for the APT girder was proposed. The validity for the fundamental natural frequency was verified. The theoretical accelerations determined by the modal decomposition method with the proposed shape function agree generally well with the test results.",
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Vibration performance of arch prestressed concrete truss girder under impulse excitation. / Cao, Liang; Liu, Jiepeng; Chen, Yohchia F.

In: Engineering Structures, Vol. 165, 15.06.2018, p. 386-395.

Research output: Contribution to journalArticle

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