Displacement–Based Seismic Active
Assistant Professor, Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, India
Post Graduate Student, Department of Civil Engineering, Indian Institute of Technology Bombay, Powai, Mumbai, India
For designing retaining walls in earthquake prone region, knowledge of seismic active earth pressure is very important. Similar to the static case, during seismic condition also, the mobilization of seismic active earth pressure depends on the amount and mode of wall movement. Very few researchers have done studies on model retaining walls to estimate the mobilized seismic active earth pressure depending on the mode and amount of wall movement. Based on the available experimental data of earlier researchers, in this paper, a semi-empirical method is proposed that can easily be used in practice to compute the seismic active earth pressure for various magnitudes of wall movements for the walls rotating about the top and bottom. The practical use of the proposed equations is shown through a worked-out example and is compared with the conventional Mononobe-Okabe method.
Keywords: seismic active earth pressure, mobilization, mode of wall movement, semi-empirical method.
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