Details
| Original language | English |
|---|---|
| Article number | 04021002-1 |
| Journal | Practice Periodical on Structural Design and Construction |
| Volume | 26 |
| Issue number | 2 |
| Publication status | Published - May 2021 |
| Externally published | Yes |
Abstract
Earthquake response control of base-isolated bridges using supplementary passive dampers is presented. A benchmark highway overcrossing located in California is selected to indicate the effectiveness of such hybrid response control schemes. The bridge is modeled as a lumped mass three-dimensional stick model. The coupled differential equations of motion for the system are derived and solved using Newmark's step-by-step iteration method. Considering a bidirectional interaction of the seismic forces, the bridge responses are investigated using various combinations of base isolators and damper systems, called hybrid systems. Further, a parametric study is carried out to investigate the dynamic response of the highway bridge by changing the characteristic parameters of the control devices and the isolation period of the structure for different hybrid systems under various real earthquake ground motions. The variations in seismic responses, such as bearing displacement and base shear in the bridge pier, are computed and compared to study the effectiveness of the various damper-isolator combinations. The present study concludes better performance of the fluid viscous damper when used as supplementary dampers with the lead-core rubber bearing or friction pendulum system for the base isolation, leading to reduced bearing displacements and pier base shear.
Keywords
- Benchmark highway bridge, Bidirectional earthquake forces, Hybrid control system, Supplementary dampers
ASJC Scopus subject areas
- Arts and Humanities(all)
- Arts and Humanities (miscellaneous)
- Engineering(all)
- Building and Construction
- Engineering(all)
- Civil and Structural Engineering
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In: Practice Periodical on Structural Design and Construction, Vol. 26, No. 2, 04021002-1, 05.2021.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Earthquake Response Control of Isolated Bridges Using Supplementary Passive Dampers
AU - Talyan, Niharika
AU - Elias, Said
AU - Matsagar, Vasant
N1 - Publisher Copyright: © 2021 American Society of Civil Engineers.
PY - 2021/5
Y1 - 2021/5
N2 - Earthquake response control of base-isolated bridges using supplementary passive dampers is presented. A benchmark highway overcrossing located in California is selected to indicate the effectiveness of such hybrid response control schemes. The bridge is modeled as a lumped mass three-dimensional stick model. The coupled differential equations of motion for the system are derived and solved using Newmark's step-by-step iteration method. Considering a bidirectional interaction of the seismic forces, the bridge responses are investigated using various combinations of base isolators and damper systems, called hybrid systems. Further, a parametric study is carried out to investigate the dynamic response of the highway bridge by changing the characteristic parameters of the control devices and the isolation period of the structure for different hybrid systems under various real earthquake ground motions. The variations in seismic responses, such as bearing displacement and base shear in the bridge pier, are computed and compared to study the effectiveness of the various damper-isolator combinations. The present study concludes better performance of the fluid viscous damper when used as supplementary dampers with the lead-core rubber bearing or friction pendulum system for the base isolation, leading to reduced bearing displacements and pier base shear.
AB - Earthquake response control of base-isolated bridges using supplementary passive dampers is presented. A benchmark highway overcrossing located in California is selected to indicate the effectiveness of such hybrid response control schemes. The bridge is modeled as a lumped mass three-dimensional stick model. The coupled differential equations of motion for the system are derived and solved using Newmark's step-by-step iteration method. Considering a bidirectional interaction of the seismic forces, the bridge responses are investigated using various combinations of base isolators and damper systems, called hybrid systems. Further, a parametric study is carried out to investigate the dynamic response of the highway bridge by changing the characteristic parameters of the control devices and the isolation period of the structure for different hybrid systems under various real earthquake ground motions. The variations in seismic responses, such as bearing displacement and base shear in the bridge pier, are computed and compared to study the effectiveness of the various damper-isolator combinations. The present study concludes better performance of the fluid viscous damper when used as supplementary dampers with the lead-core rubber bearing or friction pendulum system for the base isolation, leading to reduced bearing displacements and pier base shear.
KW - Benchmark highway bridge
KW - Bidirectional earthquake forces
KW - Hybrid control system
KW - Supplementary dampers
UR - http://www.scopus.com/inward/record.url?scp=85099148128&partnerID=8YFLogxK
U2 - 10.1061/(asce)sc.1943-5576.0000563
DO - 10.1061/(asce)sc.1943-5576.0000563
M3 - Article
VL - 26
JO - Practice Periodical on Structural Design and Construction
JF - Practice Periodical on Structural Design and Construction
IS - 2
M1 - 04021002-1
ER -