WANG Ke-feng, ZHANG Qing, XIA Xiao-zhou. Modeling of Hydraulic Fracturing of Concrete Gravity Dam Considering Fluid-Structure Interaction[J]. Applied Mathematics and Mechanics, 2015, 36(9): 970-980. doi: 10.3879/j.issn.1000-0887.2015.09.008
Citation: WANG Ke-feng, ZHANG Qing, XIA Xiao-zhou. Modeling of Hydraulic Fracturing of Concrete Gravity Dam Considering Fluid-Structure Interaction[J]. Applied Mathematics and Mechanics, 2015, 36(9): 970-980. doi: 10.3879/j.issn.1000-0887.2015.09.008

Modeling of Hydraulic Fracturing of Concrete Gravity Dam Considering Fluid-Structure Interaction

doi: 10.3879/j.issn.1000-0887.2015.09.008
Funds:  The National Natural Science Foundation of China(51179064; 11132003; 11372099)
  • Received Date: 2014-11-19
  • Rev Recd Date: 2015-04-09
  • Publish Date: 2015-09-15
  • High-pressure hydraulic fracturing (HF) is an important part of the safety-assessment of high concrete dams. Fluid-structure interaction during the progress is the keypoint to accurately predict crack growth path and risk level. In this paper, the extended finite element method (XFEM) was used for numerical simulation of HF of concrete gravity dam. Water pressure distribution model was obtained from experimental results of the hydraulic fracturing test carried out by Brühwiler and Saouma, which embodied the coupling relationship between water pressure and crack width. The method loading water pressure on crack surfaces was also given in XFEM program and then hydraulic fracturing of gravity dam was simulated. Results show that: XFEM is a very convenient and effective tool to simulate hydraulic fracture propagation. In XFEM, crack can propagate without re-meshing and crack width can be easily gained with the enriched freedom degrees. When fluid-structure interaction is in consideration, the extension angle is bigger and the crack growth length is shorter than that in the condition without considering fluid-structure interaction.
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