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

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振动与冲击 ›› 2017, Vol. 36 ›› Issue (18) : 85-90.

论文

刘文光1 于维欣1 秦川1 何文福1

作者信息 +

Hardening Model for Leading Rubber Bearings of Base-isolated Nuclear Power Plants and Seismic Response on Structure

LIU Wenguang1, YU Weixin1, QIN Chuan1, HE Wenfu1

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文章历史 +

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。文中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。最后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 reflection of isolation bearings mechanical model on structure under exceeding design severe earthquake excitation is widely concerned after East Japan earthquake. An analytical nonlinear hardening model for leading rubber bearings (LRB) in the condition of large deformation, which is based on bilinear model, is proposed. The descending of yielding stiffness after hardening and the influence of vertical load on unloading curve are both considered in the model. To confirm the validity of the model, analyses are performed for actual static loading tests of leading rubber bearings by two control groups. The correlation between yielding stiffness and history of maximum deformation is also developed in the tests. Analyses with the new model are conducted to demonstrate the seismic response on base-isolated nuclear power plants in the condition of isolation bearings at large shear deformations. Study indicates that the shear force and acceleration of nuclear power plants structure predicted by new model are magnified compared with the ones of bilinear model. It also shows that the isolation effect will decline under severe earthquake.

导出引用

刘文光1 于维欣1 秦川1 何文福1. 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[J]. 振动与冲击, 2017, 36(18): 85-90

LIU Wenguang1, YU Weixin1, QIN Chuan1, HE Wenfu1. Hardening Model for Leading Rubber Bearings of Base-isolated Nuclear Power Plants and Seismic Response on Structure[J]. Journal of Vibration and Shock, 2017, 36(18): 85-90

参考文献

[1] 梅木芳人，足立高雄，杉田浩之，萩原哲也，宇賀田健，羽場崎淳. 3 次元モデルを用いた耐震設計手法の高度化に関する研究（その1）非線形応答解析手法の検討[C]. 日本建築学会大会学術講演梗概集. 近畿, 2014. 9, 1119-1120
[2] Robinson W.H., Tucker A.G.. Tset results for lead-Rubber bearing for the William M Clayton building, Toe Toe bridge and Waiotukupuna bridge[J]. Bull. New Zealand Nad. Soe Eng, 1983, 14(1): 21-33.
[3] Fujita T., Suzuki S., Fujita S.. High damping rubber bearings for seismic isolation of buildings (1st report, hysteretic restoring force characteristics and analytical models), Trans. Japan soc. Mech. Eng. C56, 658-666,1990 (in Japanese).
[4] Park Y.J., Wen Y.K., Ang Ah-S. Random Vibration of hysteretic systems under bi-directional ground motions[J]. 1986, 14(4): 543-557.
[5] Kikuchi M., Aiken I. D.. An analytical hysteresis model for elastomeric seismic isolation bearings[J]. Engineering and Structural Dynamics, 1997, 26(2): 215-231.
[6] Lizuka M.. A macroscopic model for predicting large-deformation behaviors of laminated rubber bearing[J]. Engineering Structures, 2000, 22(4): 323-334.
[7] Yamamoto S., Kikuchi M., Ueda M., Aiken I.D.. A mechanical model for elastomeric seismic isolation bearings including the influence of axial load[J]. Earthquake Engineering and Structural dynamics, 2009, 38(2): 157-180.
[8] Takaoka E.. Shaking table test and analysis method on ultimate behavior of slender base-isolated structure supported by laminated rubber bearings [J]. Earthquake Engineering and Structural Dynamics, 2011, 40(5): 551-570.
[9] 日本建筑协会.隔震结构设计[M].刘文光,译.北京:地震出版社,2006.