Abstract
In this study, a nonlinear model is presented for analysis of damage-cracking behavior in arch dams during strong earthquakes using different seismic input mechanisms. The nonlinear system includes a plastic-damage model for cyclic loading of concrete considering strain softening and a contact boundary model of contraction joint opening. Two different earthquake input mechanisms are used for comparison, including massless foundation input model and viscous-spring boundary model considering radiation damping due to infinite canyon. The results demonstrate that effects of seismic input mechanism and radiation damping on nonlinear response and damage-cracking of the dam are significant. Compared with the results of using massless foundation input model, the damage-cracking region and contraction joint opening are substantially reduced when using viscous-spring boundary model to take into account radiation damping. However, if the damping ratio of the dam is artificially increased to about 10%–15% for massless foundation input model, the joint opening and damage-cracking of the dam are comparable to the results obtained from the viscous-spring boundary model.
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References
Yuan Z J. Influence of high in-situ stress on stability of dam foundation rock (in Chinese). Sichuan Water Power, 1999, 18(3): 25–27
Wu Z R. Study on the effect of the substitution for faults in abutment of arch dam (in Chinese). J East China Tech U Water Res, 1985, 13(3): 31–41
Wu Z R, Li J, Gu C S, et al. Review on hidden trouble detection and health diagnosis of hydraulic concrete structures (in Chinese). Sci China Ser E-Tech Sci, 2007, 50(Suppl 1): 34–50
Gu C S, Wu Y, Su H Z, et al. A new method of estimating the equivalent elastic modulus of RCCD (in Chinese). Sci China Ser E-Tech Sci, 2007, 50(Supp 1): 136–143
Gu Y C, Zhang D J, Guo H Z, et al. Regression analysis of 3D initial geostress field for dam site of Xiaowan Hydropower Station (in Chinese). Rock Soil Mech, 2008, 29(4): 1015–1020
Gu Y C. Study on establishing methods of multistage deformation forecasting indexes of super high arch dam for high geo-stress zone (in Chinese). Dissertation of Doctoral Degree. Hohai: Hohai University, 2008
Wu Z R. Safety Monitoring Theory and Its Application of Hydraulic Structure (in Chinese). Beijing: Higher Education Press, 2003
Gu Y C, Cong P J, Jin Y Q, et al. Back analysis for dam base deformation modulus based on increment displacement model in construction (in Chinese). J Hydro Eng, 2008, 27(3): 54–59
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Supported by the National Natural Science Foundation of China (Grant Nos. 50539110, 50809025, 50539010, 50579010, 50539030) and the Science and Technology Support Plan (Grant Nos. 20006BAC14B03, 2008BAB29B03)
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Wu, Z., Gu, Y., Su, H. et al. Mechanical effects of excavation rebound of arch dam bedrock and better concreting time of dam body. Sci. China Ser. E-Technol. Sci. 52, 513–517 (2009). https://doi.org/10.1007/s11431-009-0043-2
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DOI: https://doi.org/10.1007/s11431-009-0043-2