桩-土-LNG 储罐振动台试验与数值仿真分析
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TU352.1;TU473.1

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国家自然科学基金资助项目(51678107);中央财政自主基金资助项目(wd01121)


Pile-soil-LNG storage tank shaking table test and numerical simulation analysis
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    摘要:

    采用振动台试验与数值仿真两种方法对桩-土-LNG储罐的地震响应展开了分析,分析结果接近,实现了相互验证。研究结果表明:地震波沿土体和桩基的传播具有放大效应,土体会改变地震动的加速度峰值和频谱特性。在所选地震动作用下,软土层的场地放大效应更为明显,不同位置的桩基在各方向的加速度响应不同,中间位置桩基的加速度大于两侧桩,两侧桩基轴力方向相反,桩土储罐与刚性基础储罐的地震响应在波形和峰值上差异较大。基于上述研究结果,建议在研究LNG储罐的地震响应时考虑桩土对储罐的影响,并根据基础类型选择合理的地震动进行分析。

    Abstract:

    At present,thereis no experimental support for the seismic response research of pilesoil-LNG storage tanks.In this paper,shaking table test and numerical simulation method are used to carry out in-depth analysis of the pile soil-LNG storage tanks.The results of the two methods are similar,and the mutual verification can be realized.The results show that the propagation ofseismic waves along soil and pile foundation has amplification effect,and the soil will change the acceleration peak value and spec-trum characteristics of ground motion.Under the earthquake action selected in this paper,the site amplification effect of soft soillayer is more obvious.The acceleration response of pile foundation in different positions is diferent in alldirections.The acceleration of pile foundation in the middle position is greater than that of on both sides,and the axial force direction of pile foundation onboth sides is opposite.The seismic response of pile-soil storage tank and rigid foundation storage tank is quite different in waveformand peak value.Based on the above research results,it is suggested that the influence of pile soil on LNG storage tanks should beconsidered when studying the seismic response of LNG storage tanks,and reasonable ground motion should be selected for analysis according to the foundation type.

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罗东雨,孙建刚,柳春光,崔利富,王 振.桩-土-LNG 储罐振动台试验与数值仿真分析[J].振动工程学报,2021,34(3):515~527.[LUO Dong-yu, SUN Jian-gang, LIU Chun-guang, CUI Li-fu, WANG Zhen. Pile-soil-LNG storage tank shaking table test and numerical simulation analysis[J]. Journal of Vibration Engineering,2021,34(3):515~527.]

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  • 在线发布日期: 2025-04-09
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