Effect of embedment depth on the rocking isolation behavior of foundations: an experimental and numerical study

The study of soil-structure interaction effects has always been of interest to researchers in the past several decades. In this respect, rocking isolation, as one of the design concepts of foundations, is an essential soil-structure interaction issue. Considering the relatively limited knowledge of...

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Bibliographic Details
Published in:Arabian journal of geosciences 2022-02, Vol.15 (3), Article 286
Main Authors: Mousavi, Hossein, Naseri, Saman, Mir Mohammad Hosseini, Seyed Majdeddin
Format: Article
Language:English
Subjects:
Damping
Depth
Earth and Environmental Science
Earth science
Earth Sciences
Embedment
Foundation settlement
Original Paper
Plastic zones
Reduction
Rotation
Shallow foundations
Soil
Soil investigations
Soil-structure interaction
Width
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Summary:The study of soil-structure interaction effects has always been of interest to researchers in the past several decades. In this respect, rocking isolation, as one of the design concepts of foundations, is an essential soil-structure interaction issue. Considering the relatively limited knowledge of parameters affecting rocking motions and the effects of using rocking isolation on the soil-foundation response, the present study investigated the rocking behavior of rigid foundations by evaluating the embedment effect. The results indicated an increase in the embedment depth decreased the rotation and settlement of the foundation when subjected to rocking motions. However, this reduction rate decreased with the depth, and this effect almost disappeared at a depth of above nearly 15% of the foundation width. This suggests that considering a minimum embedment depth as large as 15% of the foundation width can effectively control two undesirable and problematic factors in the rocking isolation of rigid foundations. The increased foundation depth also reduced the plastic zone of the foundation’s beneath and system damping due to rocking isolation. Furthermore, the damping reduction, which is undesirable in rocking isolation, was considerably smaller than the reductions in the settlement and rotation. Overall, it could be concluded that low-depth rigid foundations would exhibit more acceptable behavior than shallow foundations under rocking isolation.
ISSN:1866-7511
1866-7538
DOI:10.1007/s12517-022-09570-w