کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
254582 | 503317 | 2016 | 9 صفحه PDF | دانلود رایگان |
Through pile defect generalization, a definite solution to the problem of longitudinal vibrations in a finite pile lying on an elastic stratum with variable section impedance is established using the δδ function. By separating variables and applying the boundary and continuity conditions of the pile–soil system, the characteristic equation for the problem is derived, and the corresponding eigenvalues are determined through numerical calculations. Then, the analytical solution for a pile subjected to steady sinusoidal excitation in the time domain is derived. The amplitude–frequency curves are analysed, and conclusions are drawn. An analytical solution for a pile subjected to transient excitation in the time domain is obtained using the principle of superposition. Then, a parametric study is conducted to investigate the characteristics of signals reflected from a defect, yielding several conclusions that are important for guiding practical defect detection. Finally, two engineering projects are described, and the theoretical and measured curves are compared.
Journal: Computers and Geotechnics - Volume 73, March 2016, Pages 170–178