Bridge-Foundation System Response

Bridge-Foundation

SystemResponse

Poster by A. Elgamal, J.-P. Conte, L. Yan, Z. Yang, and J. Lu (UC San Diego)

Stereoscopic Visualization

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.

The Pacific Earthquake Engineering Research Centerheadquarters at the University of California, Berkeley

for more information see http://peer.berkeley.edu

r

Original position Final position with residual deformation

#1 Pier & pile group

#2 Pier & pile group

#3 Pier & pile group

#4 Pier & pile group

#5 Pier & pile group

#6 Pier & pile group

#7 Pier & pile group

#8 Pier & pile groupLeft

abutmentRight

abutment

Original position

Final position with residual deformation

(a) Elevation view (exaggerated scale by a factor of 50)

(b) Plan view (exaggerated scale by a factor of 150)

Permanent Deformation of Bridge, Foundations, and Abutments

Reinforcing Steel

Unconfined concrete Confined concrete

0.61m2.13m0.61m

0.61m

0.61m

Nonlinear Fiber Bridge Pier & Foundation Pile Cross Sections

Reinforcing steel

Unconfined concreteConfined concrete

1.37m

PEER Humboldt Bay Bridge Testbed: Assessment of Ground Deformation Effects on Bridge System Response

Ground-Foundation-Bridge Computational Model

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.

PEER is contributing to the solution through high-fidelity computational simulation of actual bridge Testbed scenarios

http://opensees.berkeley.edu