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本文用基于有限元分析的数学规划法探讨了重力坝断面抗震优化的有关理论和方法.在抗震分析中,取坝体、浅层弹性地基及满库水体的综合体系作为研究对象;用直接滤频法计算结构的自振特性;用反应谱法求解地震反应.优化方法采用不求灵敏度的可变容差法.编制了计算机程序.算例表明,成果是合理的.本文所建议的方法和程序可直接用于重力坝断面的抗震优化设计.对程序作相应的修改,也可用于其它结构的抗震优化设计.
In this paper, based on the mathematical programming method of finite element analysis, the relevant theories and methods of gravity dam section anti-seismic optimization are discussed. In the seismic analysis, the comprehensive system of the dam body, shallow elastic foundation and the full reservoir water body is taken as the research object; Frequency method is used to calculate the natural vibration characteristics of the structure and the response spectrum method is used to solve the seismic response.The optimization method uses a variable tolerance method without any sensitivity and a computer program is compiled.The example shows that the result is reasonable.The proposed method and The program can be directly applied to the seismic design optimization of the gravity dam section, and the program can be modified accordingly. It can also be used to optimize the seismic design of other structures.