基于附加质量法的大型固定顶储液罐基底隔震分析

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振动与冲击 ›› 2012, Vol. 31 ›› Issue (23) : 32-38.

论文

基于附加质量法的大型固定顶储液罐基底隔震分析

张兆龙，高博青，杨宏康

作者信息 +

Seismic analysis of large base-isolated storage tank with fixed roof based on added mass method

ZHANG Zhao-long, GAO Bo-qing, YANG Hong-kang

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文章历史 +

摘要

鉴于目前储液罐基底隔震研究多采用一维简化的Haroun-Housner模型，本文基于附加质量法，考虑液体对流质量和脉冲质量，建立了储液罐三维简化的附加质量模型。通过分析比较相同地震激励下不同高径比储液罐罐的Haroun-Housner模型、附加质量模型和流固耦合模型的动力响应，验证了附加质量模型的合理性。针对某大型固定顶储液罐，基于此简化模型，基底引入FPS隔震支座，系统地研究了基底隔震储液罐在不同场地条件下的非线性地震动力响应。分析结果表明：FPS隔震支座对储液罐地震响应有很好的控制作用，有效地降低了液体脉冲分量的运动，避免了罐壁发生屈曲破坏，但放大了液体对流分量的运动。

Abstract

The simplified one-dimensional Haroun-Housner model was used widely in the seismic isolation study of storage tank. A simplified three-dimensional mechanical model was established on the basis of added mass method, which considered liquid convective and impulsive mass. Validity of the model was verified by dynamic responses of Haroun-Housner model and fluid-solid coupling model under same seismic excitations. Using the model, nonlinear seismic response of a large base-isolated storage tank with fixed roof and friction pendulum system bearing was studied systematically under different site conditions. Results showed that FPS isolation bearing was effective in controlling the seismic response of storage tank, which decreased liquid impulsive motion and avoided the buckling failure of tank shell, but increased convective motion.

导出引用

张兆龙;高博青;杨宏康. 基于附加质量法的大型固定顶储液罐基底隔震分析[J]. 振动与冲击, 2012, 31(23): 32-38

ZHANG Zhao-long;GAO Bo-qing;YANG Hong-kang. Seismic analysis of large base-isolated storage tank with fixed roof based on added mass method[J]. Journal of Vibration and Shock, 2012, 31(23): 32-38