核电厂隔震支座硬化模型及其对结构地震响应的影响分析

发布时间：2018-05-10 05:54

本文选题：核电厂 + 铅芯橡胶支座　；参考：《振动与冲击》2017年18期

【摘要】：超设计特大地震下,橡胶支座的力学模型对结构响应的影响在东日本大地震后得到了广泛的关注;在双线性模型的基础上提出了一种适合铅芯橡胶隔震支座在大变形条件下的非线性硬化模型,该模型考虑了支座硬化后的刚度退化现象以及压应力对于卸载曲线的影响。通过两组试验数据来验证模型的准确性,并得出屈服刚度与最大剪切应变之间的关系;采用数值分析方法研究隔震支座在特大地震下进入硬化后核电厂结构的地震响应。研究表明相比双线性模型,核电厂结构采用硬化模型计算得出剪切力和加速度都出现显著增加的现象,且在特大地震下隔震效果有所衰减。
[Abstract]:The influence of the mechanical model of rubber bearing on the structural response was widely concerned after the earthquake in East Japan. On the basis of bilinear model, a nonlinear hardening model for lead-rubber isolation bearing under large deformation is proposed. The stiffness degradation phenomenon after bearing hardening and the influence of compressive stress on unloading curve are considered in this model. The accuracy of the model is verified by two sets of test data, and the relationship between yield stiffness and maximum shear strain is obtained. The results show that compared with bilinear model, the shear force and acceleration of the nuclear power plant structure are significantly increased by using the hardening model, and the isolation effect is attenuated under the earthquake.
【作者单位】：上海大学土木工程系;
【基金】：国家自然科学基金项目(51278291;51478257) 教育部博士点基金项目(20133108110024)
【分类号】：TU311.3;TU352.12

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