Coupled 3D discrete-continuum numerical modeling of pile penetration in sand  

作　　者：Jian ZHOU Qi-wei JIAN Jiao ZHANG Jian-jun GUO 

机构地区：[1]Department of Geotechnical Engineering, Tongji University, Shanghai 200092, China [2]School of Civil Engineering and Transportation, Shanghai Technical College of Urban Management, Shanghai 200432, China [3]Sichuan Provincial Chuanjian Investigation and Design Institute, Chengdu 610017, China

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2012年第1期44-55,共12页浙江大学学报（英文版）A辑（应用物理与工程）

基　　金：Project (No.90815008) supported by the National Natural Science Foundation of China

摘　　要：A coupled discrete-continuum simulation incorporating a 3D aspect and non-circular particles was performed to analyze soil-pile interactions during pile penetration in sand.A self-developed non-circular particle numerical simulation program was used which considered sand near the pile as interacted particles using a discrete element method;the sand away from the pile was simulated as a continuous medium exhibiting linear elastic behaviors.The domain analyzed was divided into two zones.Contact forces at the interface between the two zones were obtained from a discrete zone and applied to the continuum boundaries as nodal forces,while the interface velocities were obtained from the continuum zone and applied to the discrete boundaries.We show that the coupled discrete-continuum simulation can give a microscopic description of the pile penetration process without losing the discrete nature of the zone concerned,and may significantly improve computational efficiency.A coupled discrete-continuum simulation incorporating a 3D aspect and non-circular particles was performed to analyze soil-pile interactions during pile penetration in sand. A self-developed non-circular particle numerical simulation program was used which considered sand near the pile as interacted particles using a discrete element method; the sand away from the pile was simulated as a continuous medium exhibiting linear elastic behaviors. The domain analyzed was divided into two zones. Contact forces at the interface between the two zones were obtained from a discrete zone and applied to the continuum boundaries as nodal forces, while the interface velocities were obtained from the continuum zone and applied to the discrete boundaries. We show that the coupled discrete-continuum simulation can give a microscopic description of the pile penetration process without losing the discrete nature of the zone concerned, and may significantly improve computational efficiency.

关 键 词：Coupled numerical modeling Discrete-continuum Micro and macro 3D simulation Non-circular particles Pilepenetration mechanism 

分 类 号：TU473[建筑科学—结构工程]