地震工程学报Issue(4)：963-967,5.DOI:10.3969/j.issn.1000-0844.2014.04.0963
对 UE 土体动力本构模型的修正
Correction of Unsymmetrical Exponential Dynamic Constitutive Model of Soil
摘要
Abstract
The unsymmetrical exponential (UE)dynamic constitutive model is used to describe the soil characteristics under dynamic loading.This model has the advantages of describing asymmet-ric cyclic loading,low memorization,explicit physical meanings of the model parameters,and sim-ple expressions.However,the UE model is asymmetric and is unable to appropriately fit the dis-tribution of soil damping ratio variation with changing strain when it is used to describe the soil hysteresis loop under constant amplitude cyclic loading.By introducing two transient variable pa-rameters in the skeleton curve of the UE model and using Massing’s method of doubling the stress and strain variables to structure the hysteretic curve,the correction model can accurately determine the shear modulus and damping ratio under different strains.The shear modulus and damping ratio were then used determine the expression of the transient parameter,and they were substituted in the hysteretic curve equation.Finally,the hysteretic curve expression and the actual skeleton curve were obtained.The results show that the correction model can overcome the limita-tions of the UE model and is in good agreement with the actual data.关键词
动力作用/UE 本构模型/修正模型/阻尼比/剪切模量Key words
dynamic load/UE constitutive model/correction model/damping ratio/shear modu-lus分类
天文与地球科学引用本文复制引用
阮璠,薄景山,齐文浩,沈园园,李煜东..对 UE 土体动力本构模型的修正[J].地震工程学报,2014,(4):963-967,5.基金项目
中国地震局工程力学研究所基本科研业务费专项(2013C02) （2013C02）
黑龙江省科学基金(QC2012C105) （QC2012C105）
国家自然科学基金项目(50978237) （50978237）
