Analysis of dynamic response of axially loaded pile using nodal exact finite element model

14th International Conference on Concrete Engineering and Technology

Buachart, C.^1,2 ; Hansapinyo, C.^1

Center of Excellence for Natural Disaster Management, Faculty of Engineering, Department of Civil Engineering, Chiang Mai University, Thailand^1

Excellent Center in Infrastructure Technology and Transportation Engineering, Department of Civil Engineering, Chiang Mai University, Thailand^2

关键词: Axial vibrations;    Axially loaded piles;    Circular cross-sections;    Displacement-Based;    Energy principles;    Response parameters;    Shape functions;    Stiffness and damping;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/431/11/112010/pdf
DOI  :  10.1088/1757-899X/431/11/112010

来源: IOP

【 摘 要 】

This research work presents the adoption of proposed displacement based finite element model so-called nodal exact finite element to solve dynamic response of axially loaded pile. The pile is assumed to be circular cross section embedded in elastic soil. The shape functions satisfy homogeneous differential equation of uniform elasto-dynamic bar was constructed. The stiffness and mass matrices for axially loaded pile are then formulated using energy principle, incorporate with proposed shape function. The dynamic response parameters, such as dynamic pile-head stiffness and damping of pile's axial vibration were computed from proposed finite element model by iterative procedure. Illustrative examples show fairly accurate results and demonstrate an effectiveness of proposed finite element compared with available analytical solutions from literatures.