Mobile QR Code QR CODE : Journal of the Korean Society of Civil Engineers
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
Page pp.39-48
ISSN 10156348
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.