Numerical Supplementary Analysis Of Dynamic Rupture Of High Arch Dam Model Test

In order to alleviate the energy crisis and improve energy structure, China develops water resources vigorously. There are many water conservancy constructions in Southwest of China. Earthquakes occur frequently in this area. High dam seismic issues need special attention. Dynamic model test is a main method of dams seismic research. With the limits of the size and effective working range of shaking table, the test results and real structure response often are put in certain error. In order to make up the test, analyze the test results from numerical method.Firstly, when study the earthquake-resistant behavior of the high arch dam by dynamic test on shaking table, the predominant frequency of seismic waves maybe out of the effective working range of the shaking table. Harmonic waves are often used as shock waves. To explore the effects of this simplified method of test results, the test was analyzed by numerical simulation method. Finite element model corresponding to the test model was created with the same loads of harmonic waves. The comparison between the calculated results and the test results shows that the numerical simulation method is effective. Then solve the model again with artificial seismic waves instead of the harmonic waves. By comparison, we find that the locations of the damage areas are similar but the shapes of the areas are different. It shows that this alternative method is reasonable, and numerical simulation is significant to expend the test results to the real structure.Secondly, simulate the development of damage of the model with transverse joints by numerical method. By comparing the distribution maps of damage of the three models with different shear keys, evaluate the effect of simulation of shear keys. We found that the simulation is reasonable. By comparison, we find that the distributions of damage on the dam with transverse joints are different from that of the dam without the transverse joints. The transverse joints are benefit to reduce the level of damage at the dam abutment. But there are areas of damage at the bottom of the transverse joints.At last, make a finite element model to simulate the original dam. The original dam and the model dam have different boundary conditions. By comparing the distribution of damage on the two models, we find that the modes of the development of damage are different, but the locations of damage are the same. In general, the model test can reflect the actual structure of the failure mode, and the numerical supplementary analysis also plays a certain role.