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Seismic damage-cracking analysis of arch dams using different earthquake input mechanisms 被引量:19
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作者 jianwen pan ChuHan Zhang +1 位作者 JinTing Wang YanJie Xu 《Science China(Technological Sciences)》 SCIE EI CAS 2009年第2期518-529,共12页
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 mo... 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. 展开更多
关键词 EARTHQUAKE input mechanism damage-cracking radiation DAMPING CONTRACTION JOINTS ARCH DAM
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