DYNAMIC CENTRIFUGE MODELING OF SOUND WALLS SUPPORTED ON CONCRETECANTILEVER AND MECHANICALLY STABILIZED EARTH RETAINING STRUCTURES

Author(s)
SOON, D DEPT OF CIVIL ENGNG, UNIV OF CALIFORNIA, DAVIS, USA CASEY, JA DEPT OF CIVIL ENGNG, UNIV OF CALIFORNIA, DAVIS, USA KUTTER, BL DEPT OF CIVIL ENGNG, UNIV OF CALIFORNIA, DAVIS, USA ROMSTAD, KM DEPT OF CIVIL ENGNG, UNIV OF CALIFORNIA, DAVIS, USA
Year
Abstract

The results of a model study comparing the dynamic behavior of sound walls supported on concrete cantilever (Caltrans Standard Type 1) and mechanically stabilized earth (MSE) retaining structures are presented. Different backfills representing a loose sand, a dense sand, and a cohesive material were studied. An additional test was runwith the loose sand and inclined reinforcing. The models were tested on a servohydraulic shaking table mounted on a centrifuge. Realistic earthquakes with peak input base accelerations of 0.65 g to 0.75 g were simulated. The sound wall response on the MSE system involvedaccumulated tilting due to nonsymmetrical resistance, and in some cases lift-off and impact of the slab. The behavior of sound walls onType 1 systems was much less sensitive to the backfill type. The MSE systems were generally more ductile than the Type 1 walls; they suffered larger permanent deformations but transmitted smaller accelerations to the sound wall. Sound wall accelerations on the Type 1 wall system were approximately twice those on the MSE system.

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Publication

Library number
I 857755 IRRD 9306
Source

TRANSPORTATION RESEARCH RECORD WASHINGTON DC USA 0361-1981 REPORT 1992 1336 PAG: 9-16 T14

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