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Seismic Deformation of Back-to-Back Mechanically Stabilized Earth (MSE) Walls
The continuing expansion of HOV lanes and limited right-of-way on urban freeways have led to increased use of back-to-back MSE walls. Because these lanes are often constructed in the existing median, many of the back-to-back structures have small aspect ratios, with the distance between the two walls often less than 0.7 times the wall height. There are no FHWA design guidelines for back-to-back walls closer than 1.2 times the wall height. In this paper, results from dynamic constitutive models are compared to those from the traditional Mononabe-Okabe pseudo-static approach. Compared to the results of conventional design methodology, data from the dynamic analyses show that walls with smaller aspect ratios exhibit greater deformation than walls having a higher aspect ratio, although this trend is obscured at lower accelerations. The study also shows that the current state-of-the-practice pseudo-static method is conservative.
Seismic Deformation of Back-to-Back Mechanically Stabilized Earth (MSE) Walls
The continuing expansion of HOV lanes and limited right-of-way on urban freeways have led to increased use of back-to-back MSE walls. Because these lanes are often constructed in the existing median, many of the back-to-back structures have small aspect ratios, with the distance between the two walls often less than 0.7 times the wall height. There are no FHWA design guidelines for back-to-back walls closer than 1.2 times the wall height. In this paper, results from dynamic constitutive models are compared to those from the traditional Mononabe-Okabe pseudo-static approach. Compared to the results of conventional design methodology, data from the dynamic analyses show that walls with smaller aspect ratios exhibit greater deformation than walls having a higher aspect ratio, although this trend is obscured at lower accelerations. The study also shows that the current state-of-the-practice pseudo-static method is conservative.
Seismic Deformation of Back-to-Back Mechanically Stabilized Earth (MSE) Walls
Hardianto, Fransiscus S. (author) / Truong, Kim M. (author)
Earth Retention Conference (ER) 2010 ; 2010 ; Bellevue, Washington, United States
Earth Retention Conference 3 ; 704-711
2010-07-26
Conference paper
Electronic Resource
English
Seismic Deformation of Back-to-Back Mechanically Stabilized Earth (MSE) Walls
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