Influence of foundation pinning and deck resistance on the response of a Chilean bridge abutment to lateral spreading

摘要

The 2010 Maule earthquake in Chile caused extensive lateral spreading at the site of the Mataquito river bridge. The surface soil deformation patterns and relatively minor structural damage to the bridge observed at this site suggest that foundation pinning effects played a prominent role in the overall response of the bridge abutments to the lateral spreading. 3D finite element analysis of a Mataquito river bridge abutment is used to examine the role of foundation pinning, lateral bridge deck resistance, and the deck expansion gap on the response of the abutment and approach embankment to a simulated lateral spreading event.