Location
San Diego, California
Presentation Date
26 May 2010, 4:45 pm - 6:45 pm
Abstract
While seismic codes do not allow plastic deformation of piles, the Kobe earthquake has shown that limited structural yielding and cracking of piles may not be always detrimental. This paper focuses on the influence of soil compliance, pile-to-pile interaction, intensity of seismic excitation, pile diameter, above–ground height of the pile, location of plastic hinges (above or below ground development), on the seismic response of pile supported bridge structures. Evaluation of the bridge pier behaviour is achieved through key performance measure indices, as is: the displacement (global) and curvature (local) ductility demands and the maximum drift ratio. It is shown that the ductility demand of a bridge pier decreases with both (a) increasing soil compliance, and (b) below-ground location of plastic hinges development. By exploiting the results, a new performance based design method is developed that allows for soil and pile yielding instead of over-designing the foundation to behave nearly elastically and forcing the potentially developed plastic hinges to occur in the pier (as with conventional capacity design).
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
Gerolymos, Nikos; Drosos, Vassilis; and Gazetas, George, "Seismic Response of Inelastic Pile Foundations: A New Performance Based Design Philosophy" (2010). International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics. 46.
https://scholarsmine.mst.edu/icrageesd/05icrageesd/session05/46
Included in
Seismic Response of Inelastic Pile Foundations: A New Performance Based Design Philosophy
San Diego, California
While seismic codes do not allow plastic deformation of piles, the Kobe earthquake has shown that limited structural yielding and cracking of piles may not be always detrimental. This paper focuses on the influence of soil compliance, pile-to-pile interaction, intensity of seismic excitation, pile diameter, above–ground height of the pile, location of plastic hinges (above or below ground development), on the seismic response of pile supported bridge structures. Evaluation of the bridge pier behaviour is achieved through key performance measure indices, as is: the displacement (global) and curvature (local) ductility demands and the maximum drift ratio. It is shown that the ductility demand of a bridge pier decreases with both (a) increasing soil compliance, and (b) below-ground location of plastic hinges development. By exploiting the results, a new performance based design method is developed that allows for soil and pile yielding instead of over-designing the foundation to behave nearly elastically and forcing the potentially developed plastic hinges to occur in the pier (as with conventional capacity design).
