Dynamic behaviour of reinforced soil retaining wall under horizontal seismic loading

Abstract

Based on the status that the reinforced soil retaining wall (RSRW) is difficult to popularize in highway in high earthquake intensity region of China. The dynamic behavior of modular-block RSRW was investigated by large-scale shaking table tests. The standard soil was taken as the backfill. The concrete blocks were selected as panel. The geogrid was reinforcement. The failure mode of the wall was observed, and dynamic response and the displacements were measured. The results showed that, the middle of retaining wall panel was slightly bulged under the inputted earthquake motion, the mortar on the surface of wall was breaking down. When the input motion was WL2.0g (model scale: 1/2), the blocks at the top fell down, then the retaining wall was destroyed. The settlements of the soil and lateral displacement of the wall increased with the increase of the acceleration motion. The acceleration amplification factor is decreased with the increase of input acceleration. When the input acceleration was larger than 0.8g, the acceleration amplification factor of upper wall gradually is decreased less than 1. When model scale and inputting earthquake motion is different, the range of acceleration amplification factor is different. Shaking table tests results of RSRW with different panel forms and reinforced materials are summarized. The results show that seismic behaviour of RSRW is excellent. It is advise to revise some items of “Chinese Specification of Seismic Design for Highway Engineering” in order to promote the application of RSRW in highway.

Performance Comparison and Critical Finite Element Based Experimental Analysis of Various Forms of Reinforcement Retaining Structural System

“…e highest values of stress were observed in the arrangements with a more toe-less heel, whereas the highest values of horizontal deformation with more heel-less toe arrangement of the wall were observed. e highest compression (in reinforcement along with concrete) was deemed to be located close to the stem and toe junction, while peak tension was located close to the shear key and toe as well as stem and heel junctions [18,19].…”

Reinforcement Strain and Potential Failure Surface of Geogrid Reinforced Soil-Retaining Wall under Horizontal Seismic Loading

“…Disclosure is paper and the article "Dynamic Behaviour of reinforced soil retaining wall under horizontal seismic loading" (Li et al [13]) are the research results of different problems in the same experiment, so there are some similar text.…”

“…e earthquake force on the RSRW is shared by the geogrid, the blocks, and the backfill (Cai et al [12]). e acceleration has amplification effect along with the height inside the backfill (Li et al [13]). e dynamic soil pressure increment is generated under the earthquake motion.…”

Shaking Table Study on the Seismic Performance of Geogrid Reinforced Soil Retaining Walls

“…In the current study, the acceleration amplification of the RSRW is calculated based on the acceleration time history for two methods. In the first method, the acceleration amplification factors are calculated by dividing the peak acceleration measured during shaking at different elevations of the specimen based on the peak shaking table acceleration [19,22,43]. In the second method, the acceleration amplification factors are calculated using the root mean square (RMS) [2,15,24].…”