DocumentCode :
1902688
Title :
A New Slice Method for Seismic Stability Analysis of Reinforced Retaining Walls
Author :
Jianqing, Jiang ; Guolin, Yang
Author_Institution :
Sch. of Civil Eng., Hunan City Univ., Yiyang, China
Volume :
3
fYear :
2009
fDate :
10-11 Oct. 2009
Firstpage :
164
Lastpage :
167
Abstract :
According to the retaining wall that reinforced by extensible reinforcements such as geogrids and geotextiles, a new slice analysis methodology was developed to analyze its internal stability under horizontal and vertical seismic loads. The slide failure wedge of the reinforced retaning wall was divided into a number of soil slices parrallel to the reinforcements. Based on the single line shape assumption for the critical slip surface of the wall, the equilibrium equations for horizontal forces, vertical forces and moments of each soil slice were established. And then, the recurrence formulas for horizontal and vertical inter-slice forces, reinforcement tensile forces were derived consequently, in which the relationship between the inter-slice forces and the safety factor FS of the wall was included. The safety factor FS and the vertical bearing capacity qmax at the wall top were obtained by solving those recurrence formulas. This proposed slice method was applied to analyze the seismic stability of two reinforced retaining walls whose height was 5 m and 10 m respectively, and the results were compared with those of some conventional approaches such as strength reduction method and FLAC3D. The results show that: this method is simple, practical and good precision in calculation, so it can be used in actual seismic stability design of reinforced walls; the simplifed critcal slip surface is more feasible and convenient for engineering application than the log-spiral failure surface.
Keywords :
earthquake engineering; geotechnical engineering; mechanical stability; optimisation; soil; walls; critical slip surface; geogrids; geotextiles; horizontal forces; horizontal seismic loads; internal stability; log-spiral failure surface; reinforced retaining walls; reinforcement tensile forces; seismic stability analysis; single line shape assumption; soil slices; strength reduction method; vertical bearing capacity; vertical interslice forces; vertical seismic loads; Automation; Civil engineering; Computer architecture; Electronic mail; Equations; Optimization methods; Safety; Shape; Soil; Stability analysis; Reinforced soil; Seismic; Slice method; Stability; Structure optimization; retaining wall;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Intelligent Computation Technology and Automation, 2009. ICICTA '09. Second International Conference on
Conference_Location :
Changsha, Hunan
Print_ISBN :
978-0-7695-3804-4
Type :
conf
DOI :
10.1109/ICICTA.2009.507
Filename :
5287925
Link To Document :
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