Numerical simulation of reinforcement strengthening for high‐arch dams to resist strong earthquakes |
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| Authors: | Yuchuan Long Chuhan Zhang Feng Jin |
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| Institution: | 1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, China;2. School of Civil Engineering, Chongqing University, Chongqing, China;3. Currently lecturer in Chongqing University. |
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| Abstract: | This paper focuses on analyzing the nonlinear seismic response of high‐arch dams with cantilever reinforcement strengthening. A modified embedded‐steel model is presented to evaluate the effects of the strengthening measure on alleviating the extension and opening of cracks under strong earthquakes. By stiffening reinforced steel, this model can easily consider the steel–concrete interaction for lightly reinforced concrete (RC) members without the need of dividing them into RC and plain concrete zones. The new tensile constitutive relations of reinforced steel are derived from the load–deformation relationship of RC members in direct tension. This model has been implemented in the finite element code and its applicability is verified by two numerical simulations for RC tests. Subsequently, numerical analyses for a 210‐m high‐arch dam (Dagangshan arch dam) are conducted with and without the presence of cantilever reinforcement. Numerical results show that reinforcement strengthening can reduce the nonlinear response of the arch dam, e.g. joint opening and crest displacement, and limit the extension and opening width of concrete cracks. Copyright © 2008 John Wiley & Sons, Ltd. |
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| Keywords: | high‐arch dam cantilever reinforcement damage analysis embedded‐steel model |
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