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A platform for research: civil engineering, architecture and urbanism
Theoretical Evaluation of Guided Wave in Deep Foundations
A theoretical approach to non-destructive evaluation of deep foundations using guided waves has been formulated. Guided wave propagation is an infinitely long cylindrical pile embedded in soil is developed from dynamic equations of elasticity. Considering axisymmetric motion in the pile, the frequency equation of longitudinal modes is derived. The frequency equation represents a transcendental relationship between the non-dimensional frequency, and non-dimensional wave number. The solution to the frequency equation is satisfied by an infinite number of modes that form branches in non-dimensional frequency-non-dimensional wave number space. The first five branches of the longitudinal family of modes in a concrete pile embedded in soft/loose and hard/dense soils were numerically evaluated. Sensitivity analyses show that the real branches in the non-dimensional frequency-non-dimensional wave number plane are essentially independent of the shear modulus and density of the surrounding soil, and correspond closely to the branches of longitudinal modes in a free-standing pile.
Theoretical Evaluation of Guided Wave in Deep Foundations
A theoretical approach to non-destructive evaluation of deep foundations using guided waves has been formulated. Guided wave propagation is an infinitely long cylindrical pile embedded in soil is developed from dynamic equations of elasticity. Considering axisymmetric motion in the pile, the frequency equation of longitudinal modes is derived. The frequency equation represents a transcendental relationship between the non-dimensional frequency, and non-dimensional wave number. The solution to the frequency equation is satisfied by an infinite number of modes that form branches in non-dimensional frequency-non-dimensional wave number space. The first five branches of the longitudinal family of modes in a concrete pile embedded in soft/loose and hard/dense soils were numerically evaluated. Sensitivity analyses show that the real branches in the non-dimensional frequency-non-dimensional wave number plane are essentially independent of the shear modulus and density of the surrounding soil, and correspond closely to the branches of longitudinal modes in a free-standing pile.
Theoretical Evaluation of Guided Wave in Deep Foundations
A. A. Hanifah (author)
1999
212 pages
Report
No indication
English
Construction Equipment, Materials, & Supplies , Soil & Rock Mechanics , Structural Analyses , Foundations , Wave propagation , Pile structure , Soil properties , Concretes , Strain tests , Shear modules , Sensitivity analysis , Density , Dynamic response , Velocity , Elastic waves , Evaluation , Attenuation
Nondestructive Evaluation of Existing Deep Foundations
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