208. earthquake performance of mechanically stabilized earth bridge abutments
Name: Yewei Zheng
Grad Year: 2017
A series of shaking table tests has been conducted for half-scale MSE bridge abutments subjected to longitudinal and transverse shaking. Experimental design of the scale model followed established similitude relationships for shaking table testing in a 1 g gravitational field, including scaling for geometry, geosynthetic reinforcement stiffness, backfill soil stiffness, bridge load, and characteristics of the earthquake motions. Experimental results indicate that the shaking table performed well in displacement-control mode for the earthquake motions, and the steel connection beams and sliding platform successfully synchronized the table motion to the base of the support wall. The seismic-induced bridge seat settlements are relatively small for all longitudinal tests, ranging from 0.06 in to 0.28 in, which would not be expected to cause significant damages to bridge structures. Reduced reinforcement spacing and increasing reinforcement stiffness are the most effective means to reduce the deformations for both static and seismic loading.
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