BEHAVIOR OF PILE GROUP AGAINST CYCLIC LATERAL LOAD UNDER DIFFERENT SOIL CONDITION

Authors

Mr. PravinUdhavraoSabde
Department of Civil Engineering (Ph.D. Scholar), Oriental University, Indore (M.P), India.

Dr. Manish Patkar
Department of Civil Engineering (Ph.D. Guide), Oriental University, Indore (M.P), India.

Abstract

As part of a research project to develop a framework for quantifying cyclic effects on piles, centrifuge model tests on single piles and pile groups in dry silica sand have been carried out at the Centre for Offshore Foundation Systems (COFS) in Perth, Australia. The piles were subjected to lateral cyclic 1-way and 2-way loading investigating the vertical and horizontal load displacement behavior. Strain gauges located along the pile shaft provided information about the bending behavior. This Study considers the tests on single piles and highlights the influence of cyclic load amplitude and number of cycles on the observed response. Furthermore, the test results are compared to results from the Extended Strain Wedge Model.Mechanics of the behavior of group of laterally loaded piles is more complex than those of the axially loaded pile group. Pile group behavior under cyclic lateral loading is nonlinear and involves complicated group interaction. Piles in the group subjected to lateral loading are influenced by the existence of similarly loaded nearby piles due to pile-soil-pile interaction. Cyclic loading of pile foundations is of importance in various fields of civil engineering such as offshore and onshore wind turbines or structures for transport infrastructure. The behavior of soils, both fine and coarse grained, under cyclic loading is complex.