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Steel and Composite Structures
  Volume 39, Number 6, June25 2021 , pages 737-750
DOI: https://doi.org/10.12989/scs.2021.39.6.737
 


Nonlinear dynamic analysis of soil nail walls considering different modeling approaches
Mahdi Bayat, Amir Homayoon Kosarieh and Mehran Javanmard

 
Abstract
    Soil nailing is one of the most common and important techniques to exchange conventional retaining systems for deep excavation. This approach contains a significant saving in cost and time of construction compared to conventional retaining systems. In this paper, an attempt has been made to evaluate the dynamical response of a deep vertical excavation on ground of 8 m height using soil nail wall. It has been tried to investigate the effects of different modeling approaches on the dynamic response of soil-nailed walls by considering the three behavioral methods; Mohr Coulomb (MC), hardening soil (HS) and hardening soil model with Small-Strain stiffness ensued from small strains (HSS). Nonlinear time history analysis has been implemented to compare the displacements under the sinus excitation with 0.5, 1, and 1.5 Hz with PGA= 0.3 g. Different points along the height of the wall are selected and considered. At the last part of this paper, incremental dynamic analysis (IDA) was implemented to the soil nail wall to consider the effect of the different earthquake records on the response of the wall. The IDA curve is also presented for the considered soil nail wall.
 
Key Words
    soil nail walls; MC model; HS model; HSS model; PLAXIS 2D; dynamic analysis; Incremental dynamic analysis (IDA)
 
Address
Mahdi Bayat and Amir Homayoon Kosarieh: Department of Civil Engineering, Roudehen Branch, Islamic Azad University, Roudehen, Iran
Mehran Javanmard: Department of Civil Engineering, Faculty of Engineering, University of Zanjan, Zanjan, Iran
 

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