Method for rapidly predicting shallow-water explosion impact damage level of concrete gravity dam

Abstract

The invention discloses a method for rapidly predicting the shallow-water explosion impact damage level of a concrete gravity dam.The method comprises the following steps that 1, a typical cross section of the concrete gravity dam is selected to establish a shallow-water explosion dam full-coupling model; 2, dam damage level classification indexes are selected; 3, corresponding damage destruction levels under the conditions of different detonating parameters are calculated; 4, damage curves and equations of junctions of different damage levels are obtained through nonlinear fitting; 5, a dam damage level prediction model is established.The method does not need a field explosion test and can predict the damage destruction level of the dam under the load effect of shallow-water explosion impact only by relying on a numerical model with the verified reliability.The method can rapidly predict the damage destruction level of the dam under the conditions of any detonating equivalent and any detonating distance and can be used for rapid rescue and reinforcement after the dam suffers from bomb attack and determine an antiknock safe protective distance of the dam.

Description

technical field [0001] The invention relates to a method for predicting damage and damage grades of concrete gravity dams under shallow water explosion impact loads such as local wars or terrorist attacks, in particular to a rapid prediction method for shallow water explosion impact damage grades of concrete gravity dams. Background technique [0002] In recent years, terrorist attacks and accidental explosions have occurred continuously around the world, especially after the "9.11" incident, making people realize that the explosion load will pose a huge threat to the safety of major water conservancy projects. And with the rapid development of precision-guided bomb technology, its hit accuracy and warhead charge quality have been greatly improved, and its ability to strike ground and underground targets has become stronger and stronger. Major water conservancy projects will face increasingly harsh explosion environments. [0003] Due to its significant political and economi...

AI Technical Summary

Problems solved by technology

Since the 20th century, there have been many bombing attacks on dams and their power generation facilities around the world: In 1943, the British Air Force used a specially developed "ricochet" to carry out underwater explosion attacks on the Minni Dam and the Ed Dam in Germany , and caused the dam to break; in 1952, the U.S. military conducted an air raid on my country's Shuifeng Hydropower Station. The bomb hit the downstream side of the dam and the power plant, and burned the plant; The war and the 1999 Kosovo war all carried out large-scale bombing of the hydroelectric power system, causing heavy losses

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