微幅晃动下考虑地基效应的矩形贮液结构动力响应研究

发布时间：2018-08-12 17:05

【摘要】：一般情况下矩形贮液结构通过底板直接坐落在地基上,有必要在考虑地基效应的基础上研究其动力特;定义微幅晃动波高限值,并建立矩形贮液结构的简化模型。采用人工边界模拟地基效应,建立了有限元计算模型,对比两类模型对应的晃动波高以验证简化模型的合理性,基于势流理论在微幅晃动范围内研究在不同边界条件、不同地震波和不同地震加速度幅值下矩形贮液结构的动力响应。结果表明,两类模型得到的晃动波高趋势一致,且最大晃动波高相差较小。在微幅晃动范围,液体最大晃动波高和地震加速度幅值成线性关系,考虑土-结构相互作用后,壁板水平位移、壁板有效应力和液体晃动压力有较大程度的的减小,而地基效应对液体晃动波高影响很小。
[Abstract]:Generally, the rectangular liquid storage structure is directly located on the foundation through the bottom plate, so it is necessary to study its dynamic characteristics on the basis of considering the effect of the foundation, define the limit value of the wave height of the micro-amplitude sloshing wave, and establish a simplified model of the rectangular liquid storage structure. In order to verify the rationality of the simplified model, the finite element calculation model is established by using artificial boundary to simulate the foundation effect. The different boundary conditions are studied in the range of micro-amplitude sloshing based on the potential flow theory, and the sloshing wave height corresponding to the two models is compared to verify the rationality of the simplified model. The dynamic response of rectangular liquid storage structures with different seismic waves and different seismic acceleration amplitudes. The results show that the trend of sloshing wave height is the same and the difference of maximum sloshing wave height is small. In the range of micro-amplitude sloshing, the maximum wave height of liquid sloshing is linearly related to the amplitude of seismic acceleration. When the soil-structure interaction is considered, the horizontal displacement, effective stress and liquid sloshing pressure of the slabs decrease to a large extent. The foundation effect has little effect on the liquid sloshing wave height.
【作者单位】：兰州理工大学土木工程学院;
【基金】：国家自然科学基金(51368039;51478212) 教育部博士点基金(博导类)(20136201110003) 甘肃省科技支撑计划(144GKCA032)
【分类号】：TU311.3

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