Geomechanics and Engineering
Volume 44, Number 4
DOI: 557-577
Numerical investigation of soil-structure interaction in multi-layer liquefiable soil under far-field and near-field earthquakes
Khezr Mohammadamini , Sanan Hour Rokh , Amir Mohammad Roozbahani
Abstract
Soil liquefaction is a destructive phenomenon resulting from earthquakes that occur in saturated loose soil. When structures are built on such soil, liquefaction can lead to significant damage, including loss of life. Therefore, understanding the behavior of structures on liquefiable soil is crucial. This study investigated the interaction of two adjacent structures on liquefiable soil using a three-dimensional finite difference method. The structures have been modeled using beam and shell elements and the soil behavior has been simulated using the Dafalias-Manzari model for stress-strain behavior. Parameters such as the distance between structures, groundwater level, number of stories, and type of seismic excitation (near-field or far-field) have been examined. The results indicate that, when the distance between the structures was equal to or exceeded their width, there was no effect on the excess pore pressure coefficient or settlement. Additionally, a groundwater level of 0.67 times the height of the structure was found to nullify the effects of settlement caused by liquefaction. An increase in the number of stories decreased the liquefaction potential but increased settlement. Far-field earthquakes were found to cause less damage than near-field ones and resulted in less settlement and liquefaction.
Key Words
far-field; interaction; liquefaction; near-field; surface structure; three-dimensional analysis
Address
- Khezr Mohammadamini — School of Mining Engineering, University of Tehran, Tehran, Iran
- Sanan Hour Rokh — School of Civil Engineering, Iran Univ. of Science and Technology, Tehran, Iran
- Amir Mohammad Roozbahani — Department of Civil Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
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