A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Long term cyclic behavior of saturated soft clay under different drainage conditions
Abstract An alarming settlement has been observed during the operation of transport infrastructures built on soft clay areas. Considering the long duration of traffic load, analyzing the long-term cyclic behavior of saturated soft clay considering different drainage conditions is of considerable significance. In this study, a series of cyclic triaxial tests were conducted on undisturbed soft clay from Wenzhou under the partially drained and undrained conditions, respectively. The test results reveal that: (a) more permanent strain was generated of the soft clay specimen under partially drainage condition, which is due to the volume change caused by both the decrease of void ratio and the shape deformation of specimens; (b) under partially drained condition, the resilient strain and hysteretic loops both exhibit a sudden increase in strain due to transient softening induced by excess pore water generated in the early stage followed by a reduction until a steady value is attained; (c) it is obvious that the allowable cyclic stress ratio (CSR) under undrained condition is larger than that under partially drained condition, indicating that considering partially drained condition is necessary in practical engineering design.
Highlights A series of cyclic triaxial tests were performed to investigate the cyclic behavior of saturated soft clay under different drainage conditions. Considering the long-term nature of the traffic load, analyzing the long-term (30,000 cycles) cyclic behavior of saturated soft clay considering partially drained conditions is of considerable significance. However, in most previous studies, the drainage condition were usually defaulted to non-drainage. Results from the stress-strain hysteresis loops imply that there is a transitory strain softening under partially drained condition, but not under undrained condition. The soft clay under partially drained condition has lower allowable cyclic stress ratio (CSR) value, which makes the development of permanent strain more sensitive than that under undrained condition.
Long term cyclic behavior of saturated soft clay under different drainage conditions
Abstract An alarming settlement has been observed during the operation of transport infrastructures built on soft clay areas. Considering the long duration of traffic load, analyzing the long-term cyclic behavior of saturated soft clay considering different drainage conditions is of considerable significance. In this study, a series of cyclic triaxial tests were conducted on undisturbed soft clay from Wenzhou under the partially drained and undrained conditions, respectively. The test results reveal that: (a) more permanent strain was generated of the soft clay specimen under partially drainage condition, which is due to the volume change caused by both the decrease of void ratio and the shape deformation of specimens; (b) under partially drained condition, the resilient strain and hysteretic loops both exhibit a sudden increase in strain due to transient softening induced by excess pore water generated in the early stage followed by a reduction until a steady value is attained; (c) it is obvious that the allowable cyclic stress ratio (CSR) under undrained condition is larger than that under partially drained condition, indicating that considering partially drained condition is necessary in practical engineering design.
Highlights A series of cyclic triaxial tests were performed to investigate the cyclic behavior of saturated soft clay under different drainage conditions. Considering the long-term nature of the traffic load, analyzing the long-term (30,000 cycles) cyclic behavior of saturated soft clay considering partially drained conditions is of considerable significance. However, in most previous studies, the drainage condition were usually defaulted to non-drainage. Results from the stress-strain hysteresis loops imply that there is a transitory strain softening under partially drained condition, but not under undrained condition. The soft clay under partially drained condition has lower allowable cyclic stress ratio (CSR) value, which makes the development of permanent strain more sensitive than that under undrained condition.
Long term cyclic behavior of saturated soft clay under different drainage conditions
Guo, Lin (author) / Liu, Liguo (author) / Wang, Jun (author) / Jin, Hongxu (author) / Fang, Yuan (author)
2020-08-06
Article (Journal)
Electronic Resource
English
Undrained deformation behavior of saturated soft clay under long-term cyclic loading
| Online Contents | 2013
Undrained deformation behavior of saturated soft clay under long-term cyclic loading
| British Library Online Contents | 2013
Shakedown Model For Saturated Clay Behavior Under Long-Term Cyclic Loading
| British Library Online Contents | 2011
Cyclic behaviours of soft silty clay with long-term traffic loading considering drainage conditions
| DOAJ | 2024