Seismic Research On Reinforced Concrete Face Rock-Filldam Under Fluid-Structure Interaction Condition

The hydraulic facilities of Zhoushan are playing the important roles in the local infrastructure development during the integrative protection for ocean-river system. The safety of these facilities is also crucial for local water resources reserves. Most of these hydraulic facilities, however, were complete a long time ago when the construction technologies failed to meet the severe and advanced criteria nowadays. In particular, these hydraulic facilities have been eroded seriously with different degree of hazard. Some structures of them even confront sinister undermining from marine circumstances, such as wave impacting and seeping etc. Therefore, the advanced simulation on these hydraulic facilities is the necessary approach for ascertaining their working behaviors under such disadvantageous conditions as seismic shocking and wave impacting.Thereby, one typical reinforced concrete face rock-fill dam is chosen as the subject that will work with the interface non-linearity and fluid-structure interaction. The dynamic finite element method is the main approach to simulate this disadvantageous case. The user subroutines were developed based on abaqus software to realize the work. The main results are showed below:1. The eventual dam type and stuffing materials were determined based on the local hydro-geological circumstances; the general parameters for structures and boundary conditions were designed;2. The working conditions under seismic shocking and hydro-dynamic impacting were ascertained for the dam simulation;3. The comprehensive model was established to simulate the complicated structures including reinforced concrete face, rock-fill block, anchoring systems, concrete interface and rock basement etc. The seismic spectrum and hydro-static-dynamic boundary conditions were defined.4. The numerical algorithm was developed based on Lanczos and Newmark theory for fluid-structure interaction dynamic analyses; the mechanical non-linearity of stuffing materials was simulated with Drucker-Prager constitution;5. The work in this paper includes static and dynamic simulations for the typical dam numerical analyses, vibration mode calculation and fluid-structure interaction dynamic computation by which the comprehensively physical-mechanical fields were offered. These results are helpful for both academic study and engineering application because they have showed directly and effectively the true status of the reinforced concrete face rock-fill dam under disadvantageous conditions.