基于加卸载响应比理论的大坝台风作用效应计算方法

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

台风对大坝的作用包括台风引起的强降雨对大坝的影响、台风引起的库水位波动(波浪)对大坝的影响以及台风风荷载对大坝的影响等。基于加卸载响应比理论,通过对台风作用下的大坝效应增强和维持判据进行深入研究,提出了库水位加卸载响应比和波浪加卸载响应比的计算方法,给出了台风作用下大坝效应增强与维持判据的评判准则。利用上述方法和评价准则,对受2010年10号台风"莫兰蒂"影响的东坞水库进行分析,结果表明,东坞水库大坝受台风影响不大,大坝处于稳定状态。将加卸载响应比理论引入到水利工程领域,是对加卸载响应比理论的应用范围的拓展,也是研究台风作用下大坝稳定性的新思路。

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 danx According to the loading and unloading response ratio theory, the criteria of en- hanced 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 Num- ber 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 ex- pand the application scope of the LURR theory and is also the new idea to study the dam stability under the action of typhoon.