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Effect of Offset Distance on Tiered Reinforced Soil Retaining Wall Subjected to Dynamic Excitation

  • Sudipta Sikha SaikiaEmail author
  • Arup Bhattacharjee
Conference paper
Part of the Sustainable Civil Infrastructures book series (SUCI)

Abstract

The rapid growth in urbanization and demand for effective space lead to increase in application of geosynthetic reinforced soil (GRS) retaining walls in major infrastructure project like flyover etc. The researchers have conducted physical, analytical and numerical studies on performance of single tiered and multi-tiered reinforced soil wall and compared the responses. The study of multi-tiered GRS wall has not achieved the growth as the single tiered GRS wall due to its limited application. The objective of this paper is to understand the response of tiered reinforced soil retaining wall subjected to dynamic excitation. This paper emphasizes on comparative study of response of multi-tiered reinforced soil walls with single- tiered reinforced soil wall subjected to seismic excitations. A 2.8 m high finite element model of modular block facing reinforced soil wall is simulated using finite element software PLAXIS 2D. The numerical model is subjected to dynamic excitations of 0.4 g Kobe earthquake and results of the response of the numerical model are validated with shake table tests results of Ling et al. (2005). The two and three tiered walls of 9 m height with different offset distances of 0.75 m, 1.5 m and 3.0 m are simulated with validated model parameters. The construction sequence is followed in numerical model simulation and model is brought to equilibrium condition after each stage of construction. The acceleration histories of Kobe earthquake (1995) having PGA 0.4 g is applied at the base of all models. The variation of horizontal displacements, lateral pressures, maximum reinforcement loads and acceleration amplification factors of single tiered and multi-tiered walls with various offset distances are compared. It is found from the analyses that the horizontal deformation, acceleration amplification factor and maximum reinforcement load decreases with the increasing tier offset.

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Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  1. 1.Jorhat Engineering CollegeJorhatIndia

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