Geomechanics and Engineering
Volume 43, Number 3, 2025, pages 243-257
DOI: 10.12989/gae.2025.43.3.243
Evaluation of kinematic bending moment for seismically loaded piles at the interface in layered ground
Ruping Luo , Jie Li , Bitang Zhu , Xuehui Jiang
Abstract
The importance of the kinematic effects, especially at the interface in the layered ground, on the behavior of seismically loaded piles, has been recognized well by academia and industry. In this paper, several widely utilized simplified models for estimating the maximum kinematic pile bending at the interfaces in the layered ground are reviewed, and a series of three-dimensional (3D) numerical models for piles with various spacings, pile numbers, ground conditions, and pile dimensions are employed to examine the kinematic interactions between soil and pile foundations. Based on the extensive numerical parametric study, the group reduction effects for kinematic bending moment are discussed, and the feasibility and reliability of the reviewed simplified models under different ground conditions are evaluated sufficiently. Finally, several empirical formulas for estimating the maximum kinematic pile bending moment under different ground conditions are proposed in this study. Notably, this study presents the first attempt to validate and modify these simplified models specifically for triple-layered ground through comprehensive 3D numerical parametric analysis. Compared with existing models that are mainly applicable to uniform or double-layered ground, the empirical formulas proposed in this study demonstrate applicability for both double-layered and triple-layered ground conditions, significantly enhancing the prediction accuracy of kinematic bending moments of piles under seismic loading in complex ground systems.
Key Words
empirical model; feasibility evaluation; kinematic bending moments; numerical modeling; pile group; seismic analysis
Address
- Ruping Luo and Bitang Zhu — State Key Laboratory of Safety and Resilience of Civil Engineering in Mountain Area, East China Jiaotong University, Nanchang, 330013, P.R. China; School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, P.R. China; Engineering Research & Development Centre for Underground Technology of Jiangxi Province; East China Jiaotong University, Nanchang 330013, P.R. China
- Jie Li and Xuehui Jiang — School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang 330013, P.R. China
PDF Viewer
Preview is limited to the first 3 pages. Sign in to access the full PDF.
Loading…
