摘要
利用英国进口的GDS标准应力路径三轴测试系统对南京地区有代表性的粉质粘土进行了等向固结-侧向排水卸荷试验研究,得出土体侧向卸荷时轴向应力-应变之间关系。根据应力-应变关系曲线性状,在修正剑桥模型的基础上,运用弹塑性理论,推导出土体在保持轴压不变侧向卸荷条件下的轴向应力-应变关系模型,模型的理论计算结果与试验结果吻合较好。
By using the GSD Standard Stress Path Triaxial Testing System imported from U. K., the isotropically consoli- dated and laterally drained unloading tests are conducted for the representative silt in Nanjing, and the curves of axial stress-strain under lateral unloading are gotten. Then, based on the modified Cambridge model, the axial stress-strain re- lationship model of the soil body under invariantly axial compression and lateral unloading is derived with elastic-plastic theory, simultaneously, it is proved that the theoretical calculation results of the model could agree well with experimental results.
出处
《水利与建筑工程学报》
2013年第1期56-59,共4页
Journal of Water Resources and Architectural Engineering
关键词
侧向卸荷
应力应变关系
GDS试验
弹塑性
lateral unloading
stress-strain relation
GDS experiment
elastoplasticity
