CAJ | 학술논문

汾渭盆地是我国乃至世界上地裂缝最为发育，灾害最为严重的地区。考虑到地裂缝灾害对场地条件的影响，尤其是对场地土体的动力特性及动力响应的影响，本文在等压固结条件下，对西安地区地裂缝带黄土进行不同围压下的固结不排水（CU）动三轴试验，获取动力学参数，在此基础上分析了地裂缝带黄土动剪切模量随动剪应变变化特征曲线以及阻尼比随动剪应变变化特征曲线，并对所获得实验曲线进行回归拟合，进而建立了地裂缝带黄土的等效黏弹性动力本构模型，为进一步分析场地土体的动力响应奠定基础。
분위분지시아국내지세계상지렬봉최위발육，재해최위엄중적지구。고필도지렬봉재해대장지조건적영향，우기시대장지토체적동력특성급동력향응적영향，본문재등압고결조건하，대서안지구지렬봉대황토진행불동위압하적고결불배수（CU）동삼축시험，획취동역학삼수，재차기출상분석료지렬봉대황토동전절모량수동전응변변화특정곡선이급조니비수동전응변변화특정곡선，병대소획득실험곡선진행회귀의합，진이건립료지렬봉대황토적등효점탄성동력본구모형，위진일보분석장지토체적동력향응전정기출。
The Weihe Basin can be one of the most developed areas associated with ground fissures and geo-hazards in China and even in the world.This paper considers the ground fissure disasters on the influence of site condition,especially to the site soil of the dynamic characteristics and dynamic response.Under the condition of constant pressure consolidation,the consolidated undrained dynamic triaxial tests are carried out on the loess at the Xi′an area ground fissures belt with different confining pressures.The tests result in dynamical parameters.Based on the experimental results,the change laws of dynamic shear modulus with strain relationship and damping ratio with strain relationship are analyzed.And the equivalent visco-elastic constitutive model is established,which lays the foundation for the further analysis of dynamic response of soil field.