Calculation Method of the Effects of Dam under Action of Typhoon Based on the Loading and Unloading Response Ratio Theory

The effects of typhoon on the dam include the effects of heavy rainfall and reservoir water level fluctuation caused by typhoon,and the typhoon wind load on the dam.According to the loading and unloading response ratio theory,the criteria of enhanced and sustaining dam effects under the action of typhoon were investigated.The calculation methods of water level loading and unloading response ratio(LURR) and wave LURR were proposed,which provided the evaluation criteria of enhanced and sustaining dam effects under the action of typhoon.The presented method and evaluation criteria were used to analyze the Number 10 typhoon Moranti on the Dongwu reservoir dam in 2010.The results showed that the typhoon has insignificant effects on the Dongwu reservoir dam and the dam is in stable.The introduction of LURR into the hydraulic engineering field can expand the application scope of the LURR theory and is also the new idea to study the dam stability under the action of typhoon.