Measured and predicted time-dependent stress-strain behaviour of Hong Kong marine deposits

1999 ◽  
Vol 36 (4) ◽  
pp. 760-766 ◽  
Author(s):  
Jian-Hua Yin ◽  
Jun-Gao Zhu
Keyword(s):  
Hong Kong ◽  
Technical Note ◽  
Time Dependent ◽  
Practical Significance ◽  
Stress Strain ◽  
Analysis And Design ◽  
Marine Deposits ◽  
Modelling Framework ◽  
Strain Behaviour ◽  
Dependent Behaviour

Hong Kong marine deposits (HKMD) are considered to be difficult (or weak) soils for civil projects because of low shear strength and time-dependent high compressibility. Understanding and modelling the time-dependent stress-strain behaviour of HKMD are of practical significance in the analysis and design of civil structures on and in HKMD. In this technical note, test data on the time-dependent behaviour of a remoulded HKMD are presented and analysed. An existing elastic viscoplastic (EVP) modelling framework is used to describe the time-dependent stress-strain behaviour of HKMD. The modelling results are compared with the measured results.Key words: stress-strain, time dependent, creep, viscoplastic, triaxial, soil.

Stress-Strain behaviour of Cement-Stabilized Hong Kong marine deposits

2021 ◽  
Vol 274 ◽  
pp. 122103
Author(s):  
Tsz-On Ho ◽  
Wen-Bo Chen ◽  
Jian-Hua Yin ◽  
Pei-Chen Wu ◽  
Daniel C.W. Tsang
Keyword(s):  
Hong Kong ◽  
Stress Strain ◽  
Marine Deposits ◽  
Strain Behaviour

Time-Dependent Stress-Strain Behavior of Soft Hong Kong Marine Deposits

1999 ◽  
Vol 22 (2) ◽  
pp. 118 ◽  
Author(s):  
RC Chaney ◽  
KR Demars ◽  
J-G Zhu ◽  
J-H Yin ◽  
S-T Luk
Keyword(s):  
Hong Kong ◽  
Time Dependent ◽  
Stress Strain ◽  
Strain Behavior ◽  
Marine Deposits

Time-dependent stress?strain behaviour due to viscous properties of geogrid reinforcement

2003 ◽  
Vol 10 (6) ◽  
pp. 176-199 ◽  
Author(s):  
D. Hirakawa ◽  
W. Kongkitkul ◽  
F. Tatsuoka ◽  
T. Uchimura
Keyword(s):  
Time Dependent ◽  
Stress Strain ◽  
Geogrid Reinforcement ◽  
Strain Behaviour

Elastic viscoplastic modelling of the time-dependent stress-strain behaviour of soils

1999 ◽  
Vol 36 (4) ◽  
pp. 736-745 ◽  
Author(s):  
Jian-Hua Yin ◽  
James Graham
Keyword(s):  
Strain Rate ◽  
Creep Test ◽  
Triaxial Compression ◽  
Constant Strain Rate ◽  
Time Dependent ◽  
Model Parameters ◽  
Stress Strain ◽  
Equivalent Time ◽  
Strain Behaviour ◽  
Modified Cam Clay

This paper presents a new framework for elastic viscoplastic (EVP) constitutive modelling. In developing the model, a general one-dimensional elastic viscoplastic (1D EVP) relationship is first derived for isotropic stressing conditions using an "equivalent-time" concept. This 1D EVP model is then generalized into a three-dimensional EVP model based on Modified Cam-Clay and viscoplasticity. Fitting functions are proposed for fitting data when model parameters are being determined. Using these functions, a specific EVP model is developed which describes the time-dependent stress-strain behaviour of soils under triaxial stress states. This model has been calibrated using data from a densely compacted sand-bentonite mixture. The calibrated model is used to compute time-dependent (or strain rate dependent) stress-strain curves from a multistage shear creep test and a step-changed, constant strain rate undrained triaxial compression test. Predictions from the EVP model are in general agreement with measured values. It is demonstrated that the model can simulate accelerating creep when deviator stresses are close to the shear strength envelope in a q creep test. It can also model the behaviour in unloading-reloading and relaxation. Limitations and possible improvements are also indicated.Key words: equivalent time, stress-strain, time dependent, elastic, viscoplastic, triaxial.

Time-dependent stress–strain behaviour due to viscous properties of geogrid reinforcement

2003 ◽  
Vol 10 (6) ◽  
pp. 176-199 ◽  
Author(s):  
D. Hirakawa ◽  
W. Kongkitkul ◽  
F. Tatsuoka ◽  
T. Uchimura
Keyword(s):  
Time Dependent ◽  
Stress Strain ◽  
Geogrid Reinforcement ◽  
Strain Behaviour
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