Response of Pıle Foundatıons Under Cyclıc Loadıngs
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The aim of this thesis is to investigate effects of different soil, pile and ground motion parameters on lateral displacement of the piles embedded in homogeneous and clean sand under cyclic loading. For this purpose, an intensive numerical analyses scheme that includes three-dimensional, finite-difference based dynamic analyses on generic soil-pile combinations has been performed. The rigidity of the soils is defined by the shear wave velocities (Vs) of the soils. These shear wave velocities values are 100m/s and 200 m/s. In the analyses performed within this scope, the stiffness ratio between the pile and the soil (Ep/Es), spacing between piles (S), shear wave velocity (Vs) and peak ground acceleration (PGA) are selected as important parameters. In the analysis the PGA values of the three near fault recording (rupture distance is less than 20 km) on rock sites having a large range of variability in the ground shaking recorded on rock sites selected from PEER NGA-W1 database were used. The peak ground acceleration value varies between 0.1g and 1g. Thus, the effect of a wide range of acceleration values on the horizontal displacement of the pile was investigated. According to the results of the analysis performed, all parameters was found effective on lateral displacement of the pile.
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