摘要
采用非线性弹簧 -阻尼延迟器 -质量块系统模拟土工格栅与土动力相互作用 ,薄单元模拟土工格栅与土接触面的动力变形特性 .根据振动台试验结果推导出土工格栅纵肋与土的刚度和接触面的阻尼比 ,利用横肋锚定板试验结果确定土工格栅横肋与土的刚度 ,并且采用集中刚度法形成接触面总刚 .最后 ,基于该模型编制了模拟加筋材料与土动力相互作用的有限元分析程序 G- D,并与加州大学 U CL A加筋挡土墙实测值进行了比较 ,验证了分析模型的合理性 ,为研究动载作用下土工格栅与土动力相互作用机理提供了理论分析工具 .
Firstly,a system made up of nonlinear springs,dashpot and mass is used to simulate the dynamic interaction between soil and geogrid,and the thin layer element is used to simulate the dynamic deformation behavior of the soil geogrid interface.The equivalent stiffiness of the longitudinal ribs soil and the interface damping ratios can be determined in the shake table test.The stiffness of the transverse bars soil may be come into being by a method,named the concentration stiffness.Finally,based on the interface model,n FE procedure,the G D program,for simulation of the soil reinforcement material dynamic interaction is proposed.The results are compared with the observed data including acceleration time response from the UCLA reinforced soil retaining wall at the University of Califormia.The results show that the model and the G D program are correct.
出处
《天津大学学报（自然科学与工程技术版）》
EI
CAS
CSCD
北大核心
2001年第4期525-528,共4页
Journal of Tianjin University：Science and Technology
