Attenuation-type and Failure-type Curves of Cyclic Accumulated Deformation Models in Saturated Normal Consolidated Clay
Based on dynamic triaxial test results of saturated soft clay, influence factors and variations on accumulated deformation were analyzed. The Parrs equation on accumulated deformation was modified to create an attenuation-type curve model on accumulated deformation of saturated normal consolidation clay. In this model, dynamic strength was introduced and a new parameter called equivalent dynamic stress level was added. Besides, based on comparative analysis on variations between failure-type and attenuation-type curves, a failure-type curve model was created on accumulated deformation of saturated normal consolidation clay. The two models can take cycle number, coupling of static and dynamic deviator stress, consolidation way into consideration. The models were verified by test results. The correlation coefficients are more than 0.96 for optimization of test results based on the two models, and there is good agreement between optimized and test curves, which show that the two models are suitable to predict variations of accumulated deformation under different loading cases and consolidation ways. In order to improve prediction accuracy, it is suggested that loading cases and consolidation ways should be consistent with in-situ conditions when dynamic triaxial tests being used to determine the constants in the models.
Saturated Normal Consolidation Clay Equivalent Dynamic Stress Level Accumulated Deformation Model Attenuation-type Curve Failure-type Curve
Chunyan Zhao Guoyong Zheng
School of Civil Engineering, Central South University, Changsha 410075, China
国际会议
上海
英文
1539-1546
2011-10-21（万方平台首次上网日期，不代表论文的发表时间）