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Behaviour of rigid piles in marine clays under lateral cyclic loading
S. Narasimha Rao
Published in
1993
Volume: 20
   
Issue: 3
Pages: 281 - 293
Abstract
In the field of ocean engineering, pile foundations are extensively used in supporting several structures. In many cases, piles are subjected to significant lateral loads. The environment prevalent in the ocean necessitates the piles to be designed for cyclic wave loading. In this investigation, the behaviour of rigid piles under cyclic lateral loading has been studied through an experimental programme carried out on model piles embedded in a soft marine clay. Static tests were also conducted on piles embedded in a clay bed prepared at different consistencies suitable to field situations. Cyclic load was applied by using a specially designed pneumatic controlled loading system. Tests were conducted on model piles made of mild steel (MS), aluminium and PVC with wide variation in pile soil relative stiffness. For cyclic load levels less than 50% of static lateral capacity, the deflections are observed to increase with number of cycles and cyclic load level and stabilise after a certain number of cycles. For cyclic load levels greater than 50% of static lateral capacity, the deflections are observed to increase enormously with number of cycles. The results of post-cyclic load tests indicate that the behaviour under static load can improve for cyclic load levels less than 40% of the static lateral capacity. The variations in the load capacity due to cyclic loading are explained in terms of the changes in strength behaviour of soil. © 1993.
About the journal
JournalOcean Engineering
ISSN00298018
Open AccessNo
Concepts (27)
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    Clay
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    Clays
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    Cyclic loading
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    MARINE ENGINEERING
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    Pile
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    Pile foundation
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    Soil-structure interaction
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    Aluminum
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    Carbon steel
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    Mathematical models
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    Mechanical testing
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    Ocean engineering
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    Polyvinyl chlorides
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    Soil structure interactions
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    Steel structures
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    Structural loads
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    Underwater soils
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    WATER WAVE EFFECTS
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    LATERAL CYCLIC WAVE LOADING
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    Marine clays
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    RIGID PILE FOUNDATIONS
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    Pile foundations
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    LATERAL CYCLIC
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    Loading
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    MARINE
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    OFFSHORE PLATFORMS
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    PILES(FOUNDATIONS