Mechanism Analysis In Concrete Face Rupture Of Shibianyu Dam

Owing to the advantages in safety economics and applicability ,the Concrete Faced Rockfill Dam (CFRD) has developed rapidly since the 70s 20th century .With the height gradually increasing and the extent becoming larger and larger, the CFRD has been the world's fastest-growing type of dam and the focus to promote by Chinese water conservancy and hydropower industry. As the main part of impervious ,concrete face plays a key role in dam safety and regular operation. Once it cracks, water would leak under the high pressure and serious damage would be caused by the infiltration of dam.Combined with practical engineering, Shibianyu CFRD is simulated with an Duncan E-B model. The calculations are done by the large finite element software ANSYS. Through the analysis of the stress deformation rule, the main reason for dam's crack is summed up. Work and conclusions of the paper is as follows,1,Shibianyu Asphalt Concrete Faced Rockfill Dam is simulated, and non-linear finite element calculation is done. With comparative study of four different results of end of construction,water storage period,operating period and the designed water level, it's found that as the water level rise, the value of principal stress increase correspondingly, but the rules are the same. Strains at the location near the 700m elevation which is the interface of artificial and bursting rockfill material is larger than those at adjacent region and cracks easily develop here.2,Comparing results between the simulation and the indoor material test, it is found that the quality of asphalt concrete is the potential reason for cracks. Stress concentration caused by material stratification is the main reason.