Abstract
This paper is presented the lateral dynamic response of pile groups embedded in dry sand under influence of vertical loads and the pile shape in-group, which are subjected to the lateral two-way cyclic loads. The laboratory typical tests with pile groups (2×1) have an aluminum-pipe (i.e. circular, square) pile, embedded length to diameter of pile ratio (L/D=40) and spacing to diameter ratio (S/D) of 3, 5, 7 and 9 are used with different cyclic-load ratio (CLR) 0.4, 0.6 and 0.8. The experimental results are revealed that both the vertical and lateral pile capacity and displacement is significantly affected by the cyclic-loading factors i.e. (number of cycles, cyclic load ratio, and shape of pile) .In this study, important design references are presented. Which are explained that the response of the pile groups under cyclic lateral loading are clear affected by the attendance of vertical load and pile shape. Where, it is reduction the lateral displacement of group piles head and increase lateral capacity about (50) % compared without vertical loads. On the other side, the pile shape is a well affected to the pile response where the level of decline in lateral displacement at the pile groups head in the square pile is more than circular pile about 20 % at the same load intensity.
Highlights
Large structures, for example offshore platforms, high-rise buildings, bridges, wind turbine foundations and railway embankments is resting on compressible soil and supporting by piles foundation
Apart from the usual loads applied by these structures, the piles are subjected to vertical, lateral, and torsional types of cyclic loading arising from the actions of waves, ship impacts, and moving vehicles [1]
Laboratory typical tests with steel pile group embedded in soft cohesive soil were exposed and compared with a numerical model that was based on a two-dimensional (2D) dynamic finite-element approach were used to study the response of Pile Group in Soft Clay under Cyclic Lateral Loading
Summary
For example offshore platforms, high-rise buildings, bridges, wind turbine foundations and railway embankments is resting on compressible soil and supporting by piles foundation. Laboratory typical tests with steel pile group embedded in soft cohesive soil were exposed and compared with a numerical model that was based on a two-dimensional (2D) dynamic finite-element approach were used to study the response of Pile Group in Soft Clay under Cyclic Lateral Loading. In an environment where the pile group is subjected only to cyclic lateral load without any static component (i.e., Hs = 0), a symmetric two-way cyclic lateral loading is imparted (e.g., pile groups supporting an offshore construction sufficiently away from the shoreline). The prevalent pattern of wave loading to offshore structures, of traffic loading to transport infrastructures, and of wind loading to high-rise buildings are random in nature, in ideal states, such random periodic load is deduced into normalized harmonic (sinusoidal) patterns for suitable engineering design [7]
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