Bridge-Foundation System Response

1. 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 group Left abutment Right abutment (a) Elevation view (exaggerated scale by a factor of 50) Final position with residual deformation Original position (b) Plan view (exaggerated scale by a factor of 150) Permanent Deformation of Bridge, Foundations, and Abutments 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. Bridge-Foundation System Response PEER is contributing to the solution through high-fidelity computational simulation of actual bridge Testbed scenarios Ground-Foundation-Bridge Computational Model PEER Humboldt Bay Bridge Testbed: Assessment of Ground Deformation Effects on Bridge System Response http://opensees.berkeley.edu 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. Nonlinear Fiber Bridge Pier & Foundation Pile Cross Sections Stereoscopic Visualization 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)