Undrained monotonic shear behavior of marine soft clay after long-term cyclic loading |
| |
| Authors: | Lin Guo Hongxu Jin Li Shi |
| |
| Institution: | 1. College of Architecture and Civil Engineering, Wenzhou University Chashan University Town, Wenzhou, China;2. Key Laboratory of Engineering and Technology for Soft Soil Foundation and Tideland Reclamation of Zhejiang Province, China;3. Innovation Centre of Tideland Reclamation and Ecological Protection, Wenzhou University, Wenzhou, Zhejiang, China;4. Department of Civil Engineering, Zhejiang University of Technology, Hangzhou, China |
| |
| Abstract: | AbstractIn the coastal area, nearshore and offshore structures have been or will be built in marine soft clay deposits that have experienced long-term cyclic loads. Therefore, the mechanical behavior of marine clay after long-term cyclic loading needs to be investigated. In this research, a series of monotonic and cyclic triaxial tests were carried out to investigate the postcyclic mechanical behavior of the marine soft clay. The postcyclic water pore pressure, shear strength and secant stiffness are discussed by comparing the results with the standard monotonic test (without cyclic loading). It is very interesting that the postcyclic behavior of marine soft clay specimen is similar to the behavior of overconsolidated specimen, that is, the specimen shows apparent overconsolidation behavior after long-term cyclic loading. Then relationship between the overconsolidation ratio and the apparent overconsolidation ratio is established on the basis of the theory of equivalent overconsolidation. Finally, a validation formula is proposed which can predict the postcyclic undrained shear strength of marine soft clay. |
| |
| Keywords: | Marine clay postcyclic shear behavior stiffness degradation apparent overconsolidation |
|
|
