Comments for Baja California Earthquake Clearinghouse http://www.eqclearinghouse.org/20100404-baja Magnitude 7.2 on April 4, 2010 Thu, 29 Apr 2010 18:23:46 +0000 hourly 1 http://wordpress.org/?v=3.0 Comment on Hwy. 2 Overcrossing, Intermediate Bent Damage by Majid Sarraf http://www.eqclearinghouse.org/20100404-baja/reports-from-the-field/hwy-2-overcrossing-intermediate-bent-damage/comment-page-1#comment-4 Majid Sarraf Thu, 29 Apr 2010 18:23:46 +0000 http://www.eqclearinghouse.org/20100404-baja/?p=184#comment-4 In Highway 2 Overcrossing, the transverse seismic component of ground motion was predominant causing shear key failures. As the steel dowels providing shear-friction resistance of the key are very close to the exterior portion of bent cap, tension cracks had developed and extended down into the bent cap, causing damage in weakly confined potion of the cap. This photo clearly shows the damaged shear key and bent cap at the intermediate bent. In Highway 2 Overcrossing, the transverse seismic component of ground motion was predominant causing shear key failures.

As the steel dowels providing shear-friction resistance of the key are very close to the exterior portion of bent cap, tension cracks had developed and extended down into the bent cap, causing damage in weakly confined potion of the cap. This photo clearly shows the damaged shear key and bent cap at the intermediate bent.

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