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基于铅芯橡胶支座,以某核电站核岛厂房为例,进行基础隔震技术在核电站结构设计中的应用研究,包括整体隔震方案的设计、隔震装置的选择、计算模型的确定等,并通过动力时程分析对比研究隔震支座布置间距和隔震层恢复力模型对结构加速度和位移响应的影响。研究结果表明:采用隔震措施后,结构自振周期明显增大,上部结构加速度响应明显减小,同时整体位移也会增加较多,但层间位移很小;相比隔震支座等效线性模型,双线性模型更符合支座的实际滞回特性,在实际设计中应优先考虑采用。
Based on the lead-rubber bearing, taking the nuclear island plant of a nuclear power plant as an example, this paper studies the application of base isolation technology in the design of nuclear power plant structure, including the design of the overall isolation scheme, the selection of isolation devices and the determination of calculation models, Through the dynamic time history analysis, the influence of the isolation distance and the restoring force of the isolation layer on the structure acceleration and displacement response are studied. The results show that the structure self-vibration period increases obviously and the acceleration response of the superstructure decreases obviously when the isolation measures are taken. Meanwhile, the overall displacement will increase more but the displacement between layers is smaller. Compared with the isolation bearing Linear model, bilinear model more in line with the actual bearing hysteresis characteristics, in the actual design should give priority to the use of.