Location
San Diego, California
Presentation Date
26 May 2010, 1:30 pm - 2:15 pm
Abstract
Rocking foundations provide many desirable characteristics for a yielding dynamic system; they are economical, they provide a ductile (energy dissipating) moment limiting hinge, and they have a natural re-centering tendency. In order to take advantage of these characteristics in routine practice, simplified design procedures for bridge systems with rocking foundations are required. Two performance targets for deterministic seismic bridge design are: collapse should not occur during the “Maximum Credible Earthquake”, and, the serviceability of the bridge should not be compromised during smaller events that are expected during the lifetime of the structure (Functional Evaluation Earthquakes). The crux of the design procedure is the estimation of maximum and permanent displacements with rocking foundations. This paper describes a few candidate procedures, including (1) finite element analysis of a soil-foundation-column-deck-abutment system, (2) modeling the deck-column-foundation as a nonlinear single degree of freedom system, and (3) spectral displacement at an appropriate period of the system.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th International Conference on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 2010 Missouri University of Science and Technology, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Kutter, Bruce L.; Deng, Lijun; and Kunnath, Sashi, "Estimation of Displacement Demand for Seismic Design of Bridges with Rocking Shallow Foundations" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 3.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session10/3
Included in
Estimation of Displacement Demand for Seismic Design of Bridges with Rocking Shallow Foundations
San Diego, California
Rocking foundations provide many desirable characteristics for a yielding dynamic system; they are economical, they provide a ductile (energy dissipating) moment limiting hinge, and they have a natural re-centering tendency. In order to take advantage of these characteristics in routine practice, simplified design procedures for bridge systems with rocking foundations are required. Two performance targets for deterministic seismic bridge design are: collapse should not occur during the “Maximum Credible Earthquake”, and, the serviceability of the bridge should not be compromised during smaller events that are expected during the lifetime of the structure (Functional Evaluation Earthquakes). The crux of the design procedure is the estimation of maximum and permanent displacements with rocking foundations. This paper describes a few candidate procedures, including (1) finite element analysis of a soil-foundation-column-deck-abutment system, (2) modeling the deck-column-foundation as a nonlinear single degree of freedom system, and (3) spectral displacement at an appropriate period of the system.
