Nonlinear Dynamic Analysis of Concrete Gravity Zavin Dam

In recent decades, the issue of seismic safety of concrete dams, attention has been paid. The main reason for this may be economic plan and also the lifetime of existing dams. Thus fondness engineering community to develop and use a powerful process for nonlinear analysis and as much as possible close to reality as concrete dams under different loads, especially dynamic loads generated by earthquakes can be seen. In this paper, nonlinear dynamic analysis of concrete gravity dams before cracking with regard to interaction Dam - Lake - the foundation is done. The Smeared crack model for nonlinear analysis of concrete gravity dams and cracks has been used to determine the position and orientation. The research has been modeled Zavin Dam, in North-East of Iran. Nonlinear Dynamic Analysis of this research under three different earthquake with same PGA around 0.5g and frequency varies done and PGA been given that the earthquake in almost same vibration and power can have a different story and this suggests that factors other than PGA in the destructive power of earthquakes are effective. Dynamic interaction of dam and lake, with Zangar method is the model and for nonlinear model of concrete In Nonlinear Dynamic Analysis of Rupture criterion Drucker - Prager has been used. After dynamics analyzing in Zavin dam in the cracked presence the horizontal and the vertical crown displacement and tensile stress major at the end and leave amounts of strain plastic bottom left along x and y obtained. Fissuring results show that the tensile cracking of concrete dams’ behavior important factor is nonlinear. Responses obtained from nonlinear analysis Zavin dam, crack without and after crack completely left disagree.