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An efficient parameter identification procedure for soft sensitive clays |
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| Authors: | Liang Ye Yin-fu Jin Shui-long Shen Ping-ping Sun Cheng Zhou |
| Institution: | 1. Department of Civil Engineering, Zhejiang University of Science and Technology, Hangzhou, 310012, China 2. State Key Laboratory of Ocean Engineering, School of Naval Architecture, Ocean, and Civil Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China 3. LUNAM University, Ecole Centrale de Nantes, GeM UMR CNRS, 6183, Nantes, France 4. Department of Civil Engineering, Zhejiang University of Water Resources and Electric Power, Hangzhou, 310018, China 5. State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource & Hydropower, Sichuan University, Chengdu, 610065, China |
| Abstract: | The creep and destructuration characteristics of soft clay are always coupled under loading, making it difficult for engineers to determine these related parameters. This paper proposes a simple and efficient optimization procedure to identify both creep and destructuration parameters based on low cost experiments. For this purpose, a simplex algorithm (SA) with random samplings is adopted in the optimization. Conventional undrained triaxial tests are performed on Wenzhou clay. The newly developed creep model accounting for the destructuration is enhanced by anisotropy of elasticity and adopted to simulate tests. The optimal parameters are validated first by experimental measurements, and then by simulating other tests on the same clay. Finally, the proposed procedure is successfully applied to soft Shanghai clay. The results demonstrate that the proposed optimization procedure is efficient and reliable in identifying creep and destructuration related parameters. |
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