摘要
通过进行应力控制的循环三轴试验,研究了湛江钢铁海漫滩、海积平原区域淤泥质土的震陷特性,充分考虑了土体围压、固结比、循环应力比的大小对残余应变的影响,得到了软粘土残余应变随振动次数、围压、固结比、循环应力比而变化的规律。结果发现不同因素的影响存在耦合的作用,残余应变的发展主要表现为衰减型曲线和破坏型曲线,可分别用对数关系曲线模型和指数关系曲线模型进行预测,对该区域的防震建设提供了有价值的参考。
Through the dynamic triaxial tests under controlling the stress,the characteristics of seismic settlement of soft soil in Zhanjiang were analyzed.Considering the influence of the confined pressure,consolidation ratio,dynamic stress ratio,the laws of residual strain changing with cyclic number,confined pressure,consolidation ratio,dynamic stress ratios were obtained respectively.The results show that there is a coupling relationship among different factor＇s influences of the residual strain,and it can be subdivided into types of attenuation curves and failure curves which could be forecasted by logarithmic relationship curve model and exponential relationship curve model separately.The results in this paper is of great value to the earthquake prevention construction of the region.
出处
《低温建筑技术》
2012年第9期84-87,共4页
Low Temperature Architecture Technology
基金
国家自然科学基金资助项目(40872178)
上海市重点学科建设项目资助(B308)
关键词
循环荷载
震陷
GDS动三轴试验
残余应变
cyclic loading
seismic settlement
GDS dynamic triaxial test
residual strain
