Location

Arlington, Virginia

Session Start Date

8-11-2008

Session End Date

8-16-2008

Abstract

Soil-structure interaction (SSI) effects when evaluating seismic response of deep bridge foundations to earthquake loading are complex and sometimes intriguing. The main factors in soil-structure interaction considerations that govern the seismic design of deep bridge foundations include interactive inertial forces, soil-pile kinematic forces in particular in liquefied sands or strain-softened clays due to seismic shaking, and the loss of soil support to the piles due to soil liquefaction. To evaluate these three key effects for the design of bridge foundations in seismic regions, soil-structure interaction analyses are normally required. Such analyses become more complex when soils supporting the bridge foundations are liquefiable and the effects of soil liquefaction need to be considered. Soil-structure interaction effects are routinely considered in seismic design, however, the way of incorporating the effects of soil liquefaction can be different depending on the project specific seismic design requirements and performance criteria. This paper explores how soil-structure interaction analyses have been incorporated into the design of three bridges in the seismically active Greater Vancouver area.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Sixth Conference

Publisher

Missouri University of Science and Technology

Publication Date

8-11-2008

Document Version

Final Version

Rights

© 2008 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

 
COinS
 
Aug 11th, 12:00 AM Aug 16th, 12:00 AM

Soil-Structure Interaction Considerations in Seismic Design for Deep Bridge Foundations

Arlington, Virginia

Soil-structure interaction (SSI) effects when evaluating seismic response of deep bridge foundations to earthquake loading are complex and sometimes intriguing. The main factors in soil-structure interaction considerations that govern the seismic design of deep bridge foundations include interactive inertial forces, soil-pile kinematic forces in particular in liquefied sands or strain-softened clays due to seismic shaking, and the loss of soil support to the piles due to soil liquefaction. To evaluate these three key effects for the design of bridge foundations in seismic regions, soil-structure interaction analyses are normally required. Such analyses become more complex when soils supporting the bridge foundations are liquefiable and the effects of soil liquefaction need to be considered. Soil-structure interaction effects are routinely considered in seismic design, however, the way of incorporating the effects of soil liquefaction can be different depending on the project specific seismic design requirements and performance criteria. This paper explores how soil-structure interaction analyses have been incorporated into the design of three bridges in the seismically active Greater Vancouver area.