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SUMMARY:Terzaghi Lecture: Ground Deformation Effects on Subsurface Pipelin
 es and Infrastructure Systems - Professor Tom O'Rourke\, Thomas R. Briggs 
 Professor of Engineering\, Cornell University
DTSTART:20160310T173000Z
DTEND:20160310T183000Z
UID:TALK64192@talks.cam.ac.uk
CONTACT:Jen Fusiello
DESCRIPTION:There are tens of millions of km of pipelines worldwide used i
 n water supplies\, gas and liquid fuel delivery systems\, electric power n
 etworks\, and wastewater conveyance facilities. An overview of these criti
 cal infrastructure assets is provided. Soil-structure interaction affectin
 g pipeline and underground conduit response to externally imposed ground d
 eformation is examined\, starting with stress transfer from soil to the ci
 rcular surface of the pipe. Various models for soil-pipeline interaction a
 re described\, and a methodology is proposed for evaluating soil-pipeline 
 interaction in granular soils for any direction of pipe movement at any de
 pth. Suction-enhanced soil reaction to relative soil-pipe movement is disc
 ussed.  Guidance is provided regarding soil-pipeline interaction modeling 
 in which the pipeline is represented as a beam vs a three-dimensional shel
 l. Large-scale laboratory testing and numerical modeling for the next gene
 ration hazard-resilient pipelines are described\, and innovative ways of a
 ccommodating ground deformation are illustrated. Water supply system respo
 nse to widespread liquefaction-induced ground deformation during the Cante
 rbury Earthquake Sequence in New Zealand is evaluated with high density Li
 DAR and GIS analyses\, and a methodology is presented for estimating pipel
 ine damage as the combined response to liquefaction-induced differential s
 ettlement and lateral ground strain. The community impact of pipeline syst
 em performance is illustrated with respect to the role that the water supp
 ly plays in fire suppression in San Francisco.  
LOCATION:Cambridge University Engineering Department\, Lecture Room 3
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