填石料的动力特性及其弹塑性有限元分析  

Finite Element Analysis of Dynamical Characteristic and Elastic-plastic of Rockfill

作　　者：赵明华[1] 曾广冼[1] 彭文祥[1] 蒋冲[1] 

机构地区：[1]湖南大学土木工程学院,湖南长沙410082

出　　处：《矿冶工程》2007年第1期1-4,8,共5页Mining and Metallurgical Engineering

基　　金：交通部西部项目资助(200231800021)

摘　　要：通过对填石料动力特性的室内试验研究,探讨了填石料在振动压实中的沉降量和内部土压力变化,并采用D rucker-Prager弹塑性本构模型对填石路基的动力特性进行了有限元分析。结果表明,理论值与实测值吻合较好,即使在较大的动力荷载作用下,填石料内部产生的塑性区也只是暂时和局部的,仍可维持其整体稳定,并具有应变硬化的动力特性。The dynamical characteristic of rockfill is studied through indoor experiments, and the settlement and the inner soil pressure variation of the rockfill in the course of vibration compaction are discussed. A finite element analysis was made on the dynamical characteristic of rockfill roadbed using Drucker-Prager Elastic-plastic model. It showed that the theoretical results well conformed to the experimental data. Even under bigger dynamical load, the plastic area formed in the rockfill was just temporary and partial so that the rockfill could still keep stable and has a dynamical characteristic of strain hardening.

关 键 词：填石料 动力特性 弹塑性模型 有限元分析 

分 类 号：TU443[建筑科学—岩土工程]