Research Article
Oct 1982
Dynamic Tests and System Identification of Bridges
Publication: Journal of the Structural Division
Volume 108, Issue 10
Abstract
A five-span, four-hundred-foot long, reinforced concrete box girder birdge supported on single column piers that are pile-founded was subjected to extensive dynamic tests. The pullback and quick-release method of excitation was used. Two D-8 crawler tractors were used to apply total release loads that had a magnitude of about one-quarter of the earthquke design loads. The transverse mode shapes and natural frequencies obtained from these tests were used in conjunction with the system identification procedure outlined herein. By using these techniques, it is possible to identify the in situ dynamic stiffnesses of the pier foundations as well as the abutment structures. In addition, the dynamic bending and shear stiffness factors for the superstructure deck were also obtained. Thus, carefully conducted dynamic tests of full-scale highway bridges provide detailed information about the structure. At the same time, they shed much experimental light on the soil-structure interaction aspects of the problem, which in many cases greatly affects the distribution of seismic loads in bridges.
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Information
Published In
Journal of the Structural Division
Volume 108 • Issue 10 • October 1982
Pages: 2295 - 2312
Copyright
© 1982 American Society of Civil Engineers.
History
Published in print: Oct 1982
Published online: Feb 1, 2021
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Authors
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Bruce M. Douglas, M.ASCE
Prof., Dept. of Civ. Engrg., Univ. of Nevada, Reno, Nev. 89557
Wayne H. Reid, AM.ASCE
Grad. Student, Dept. of Civ. Engrg., Univ. of Nevada, Reno, Nev. 89557
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ASCE Library Cards let you download journal articles, proceedings papers, and available book chapters across the entire ASCE Library platform. ASCE Library Cards remain active for 24 months or until all downloads are used. Note: This content will be debited as one download at time of checkout.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.
Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.