Estimation of Settlement of Shallow Strip Foundation Resting on Soft Clay Subjected to Vertical Cyclic Loading

Das, Gobinda (2018) Estimation of Settlement of Shallow Strip Foundation Resting on Soft Clay Subjected to Vertical Cyclic Loading. MTech thesis.

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Abstract

The settlement of a shallow foundation under cyclic loading is strongly influenced by the response of soil whereas the response of soil largely depends on the cyclic loading. The foundations and the soil at the railway tracks are subjected to cyclic load as a form of pulse load due to the moving of wheel load.Therefore, it is necessary to study the soil response due to such type of cyclic loading. The present study focuses on investigating the settlement response of a strip foundation resting on soft clay subjected to vertical cyclic loading in the form of a rectangular pulse. A strip foundation-soil system is modeled and the settlement response is estimated using numerical programming tool Open System for Earthquake Engineering Simulation (OpenSees). Combinations of an allowable vertical safe static load and rectangular pulse load with a frequency of one cycle per second are applied to the footing.The magnitude of the allowable static load and the amplitude of cyclic load, depth of embedment are varied to observe the settlement response of the foundation. The effect of variation of above-mentioned parameters on the settlement pattern is explained. Based on the results obtained from the numerical study, the critical number of load cycles (ncr)after which the settlement becomes negligible for further cyclic loading, is estimated for each case. Using the database of present results,empirical equations are proposed to predict the settlement,using regression analysis.

Item Type:Thesis (MTech)
Uncontrolled Keywords:Settlement; Strip foundation; Soft clay; Embedment depth; Cyclic load; OpenSees
Subjects:Engineering and Technology > Civil Engineering > Geotechnical Engineering
Divisions: Engineering and Technology > Department of Civil Engineering
ID Code:9525
Deposited By:IR Staff BPCL
Deposited On:15 Feb 2019 12:40
Last Modified:15 Feb 2019 12:40
Supervisor(s):Behera, Rabi Narayan

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