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Dynamic Load Sharing of Combined Pile Raft Foundation (CPRF) for Reinforced Concrete Structures

Author

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  • Soubhagya Karmakar

    (Homi Bhabha National Institute, Department of Atomic Energy, Mumbai, India)

  • Rajiv Ranjan

    (Nuclear Power Corporation of India Limited, Department of Atomic Energy, Mumbai, India)

  • Vedula Srinivasa Phanikanth

    (Bhabha Atomic Research Centre, Department of Atomic Energy, Mumbai India)

Abstract

Combined pile raft foundation (CPRF) is one of the emerging concepts for providing a cost-effective and efficient solutions for heavily-loaded structures. However, predicting the behaviour of such foundations, especially the load sharing between raft and pile is a challenge due to its inherent complex interactions. Existing analysis methods are either bound within a range of simplifying assumptions or sometimes computationally demanding. Hence, an attempt has been made to evolve a simple and easily implementable methodology, considering non-linear degrading behaviour of soil in a rational manner. The approach has first been validated with measured response during an experimental centrifuge testing of a CPRF in soft Malaysian kaolin clay and an instrumented bridge (Impulsora) founded in soft clayey soil. Subsequently, a range of comparative parametric evaluation of load sharing and settlement characterstics has been carried out which has indicated the importance of pile layout, length and numbers to arrive at a safe and economic design.

Suggested Citation

  • Soubhagya Karmakar & Rajiv Ranjan & Vedula Srinivasa Phanikanth, 2020. "Dynamic Load Sharing of Combined Pile Raft Foundation (CPRF) for Reinforced Concrete Structures," International Journal of Geotechnical Earthquake Engineering (IJGEE), IGI Global, vol. 11(1), pages 17-44, January.
    • Handle: RePEc:igg:jgee00:v:11:y:2020:i:1:p:17-44
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