ELASTODYNAMIC MODEL FOR LARGE-DIAMETER END-BEARING SHAFTS

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概要

• 論文の詳細を見る

• The dynamic response of large-diameter end-bearing cylindrical shafts is studied. First, the popular plane-strain model of Novak is reviewed and its limitations are discussed. An improved model is then developed which, while retaining the simplicity of the original model, accounts for the third dimension by considering the normal and shear stresses acting on the upper and lower faces of a horizontal soil slice. These stresses are incorporated in the analysis by impleminting a dynamic Vlasov-Leontiev approximation based on integrating the governing equations over the thickness of the soil layer. It is shown that this operation leads to a set of elastodynamic equations which are similar to those in the plane-strain model, yet properly incorporate the salient 3-D effects. Explicit closed-form solutions are obtained for : (i) the dynamic soil reaction along the shaft ; (ii) the dynamic impedance of the shaft ; (iii) the displacement field in the soil ; and (iv) the dynamic interaction factors between neighboring shafts. Both vertical and lateral oscillations are analyzed for single and grouped shafts. Results are presented in terms of dimensionless graphs which highlight the importance of soil-foundation interaction on the response. It is shown that the proposed model avoids the limitations of the plane strain model.

• 社団法人地盤工学会の論文
• 2001-06-15

著者

• Mylonakis G

  Assistant Professor City University Of New York New York 10031 Usa ; Mylonakis@ccny.cuny.edu

• MYLONAKIS GEORGE

  Assistant Professor, City University of New York, New York 10031, USA ; mylonakis@ccny.cuny.edu

• Mylonakis George

  Assistant Professor City University Of New York New York 10031 Usa ; Mylonakis@ccny.cuny.edu Manuscr

関連論文

• ELASTODYNAMIC MODEL FOR LARGE-DIAMETER END-BEARING SHAFTS
• A NEW ANALYTICAL MODEL FOR SETTLEMENT ANALYSIS OF A SINGLE PILE IN MULTI-LAYERED SOIL
• SIMPLIFIED MODEL FOR SEISMIC PILE BENDING AT SOIL LAYER INTERFACES

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