A NEW COMPUTER PROGRAM FOR THE SEISMIC ANALYSIS OF ARCH DAMS INCLUDING JOINT NONLINEARITY AND FLUID-STRUCTURE INTERACTION

摘要

Several effects are important in an earthquake analysis of an arch dam. Among the most important ones are the interaction of the dam with the reservoir and the foundation, and the non-linear behaviour of contraction joints. While interaction problems typically have to be treated in the frequency domain, nonlinear problems in the dam have to be analysed in the time domain. Algorithms for solving the interaction problem in the time domain as well as algorithms for treating the nonlinear behaviour of joints have been developed earlier. These algorithms are now being implemented in a new computer program named CODA. The article starts with a brief review of the theoretical background. Then the main design and architecture are explained. This includes some innovative concepts like separating the model database from the algorithmic part and chaining several algorithms in a sequence with possible changes of the model between algorithms. Finally, the different software packages that build up the program are listed. Practical experience with the programming language C++ in this large software project is also given.