Transcript Slide 1

Ground-foundation interaction
dictates the level and
characteristics of earthquake
excitation. Lateral ground
deformation can unseat the
bridge deck, and/or damage the
bridge approach ramps. In
recent earthquakes, bridge
damage resulted in prolonged
traffic disruptions and Billion
Dollar level replacement
expenses.
BridgeFoundation
System
Response
PEER is contributing to the solution through high-fidelity computational
simulation of actual bridge Testbed scenarios
Ground-FoundationBridge Computational
Model
PEER Humboldt Bay Bridge Testbed:
Assessment of Ground Deformation Effects on
Bridge System Response
Unconfined concrete
Confined concrete
Confined concrete
0.61m
0.61m
Unconfined concrete
http://opensees.berkeley.edu
1.37m
Reinforcing Steel
2.13m
0.61m
0.61m
Reinforcing steel
Nonlinear Fiber Bridge Pier & Foundation Pile Cross Sections
Original position
Left
abutment
#1 Pier &
pile group
#2 Pier &
pile group
The PEER OpenSees simulation platform
enables large-scale earthquake simulations
employing state-of-the-art computational
models for ground materials, pile foundations,
and bridge structural elements.
Final position with residual deformation
#3 Pier &
pile group
#4 Pier &
pile group
#5 Pier &
pile group
#6 Pier &
pile group
#7 Pier &
pile group
#8 Pier &
pile group
Right
abutment
(a) Elevation view (exaggerated scale by a factor of 50)
Permanent Deformation of Bridge, Foundations, and Abutments
Final position with residual deformation
Original position
r
Stereoscopic Visualization
(b) Plan view (exaggerated scale by a factor of 150)
The Pacific Earthquake Engineering Research Center
headquarters at the University of California, Berkeley
for more information see http://peer.berkeley.edu
Poster by A. Elgamal, J.-P. Conte, L. Yan, Z. Yang, and J. Lu (UC San Diego)