| Title |
Natural Frequency Characteristics of Vertically Loaded Barrettes |
| Authors |
이준규(Lee, Joon Kyu) ; 고준영(Ko, Jun Young) ; 최용혁(Choi, Yong Hyuk) ; 박구병(Park, Ku Byoung) ; 김재영(Kim, Jae Young) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.1.0039 |
| Keywords |
barrette 말뚝;고유진동수;진동형;수치해석 Barrettes;Natural frequency;Mode shape;Numerical analysis |
| Abstract |
In this paper, an analytical model is proposed for assessing the natural frequency of barrettes subjected to vertical loading. The differential equation governing the free vibration of rectangular friction piles embedded in inhomogeneous soil is derived. The governing equation is numerically integrated by Runge-Kutta technique and the eigenvalue of natural frequency is computed by Regula-Falsi method. The numerical solutions for the natural frequency of barrettes compare well with those obtained from finite element analysis. Illustrated examples show that the natural frequencies increase with an increase of the cross-sectional aspect ratio, the friction resistance ratio and the soil stiffness ratio, and decrease with an increase of the friction aspect ratio, the slenderness ratio and the load factor, respectively. |