| 地震作用下柱承式筒仓仓壁侧压力试验研究 |
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| 引用本文： | 丁永刚,,骆倩,许启铿,,李学森,刘强,周志耀.地震作用下柱承式筒仓仓壁侧压力试验研究[J].世界地震工程,2021,0(3):119-128. |
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| 作者姓名： | 丁永刚 骆倩 许启铿 李学森 刘强 周志耀 |
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| 作者单位： | 1. 河南工业大学土木工程学院, 郑州 450001;2. 河南省粮油仓储建筑与安全重点实验室, 郑州 450001 |
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| 摘 要： | 地震作用下贮料对筒仓产生的超压是造成筒仓损伤破坏的原因之一。为研究地震作用下贮料的地震响应特性及变化规律，对缩尺比例为1∶25的柱承式筒仓模型开展了单向和双向地震作用下的振动台试验，揭示了筒仓仓壁动态侧压力分布规律和超压系数，建立了仓壁动态侧压力的计算方法。研究表明:（1）地震时筒仓内贮料的运动滞后于仓壁，随着地震动持续滞后逐渐明显，且沿仓壁顶部至底部滞后不断减弱；（2）动态侧压力分布规律与测点布置位置、地震波的输入方式相关；（3）仓体顶部范围内超压系数试验值大于规范采用值，现行规范中采用的修正系数偏小；（4）仅依据单向地震激励，尚不足以真实反映地震作用下筒仓贮料的动力学特性，筒仓结构强度设计时不应忽略双向地震作用。研究成果可为柱承式筒仓的抗震设计提供参考和依据。
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| 关 键 词： | 柱承式筒仓 仓壁侧压力 振动台试验 贮料 动力响应 |
Experimental study on lateral pressure of column-supported silo under earthquake |
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| DING Yonggang,' target="_blank" rel="external">,LUO Qian,XU Qikeng,' target="_blank" rel="external">,LIXuesen,LIU Qiang,ZHOUZhiyao.Experimental study on lateral pressure of column-supported silo under earthquake[J].World Information On Earthquake Engineering,2021,0(3):119-128. |
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| Authors: | DING Yonggang " target="_blank">' target="_blank" rel="external"> LUO Qian XU Qikeng " target="_blank">' target="_blank" rel="external"> LIXuesen LIU Qiang ZHOUZhiyao |
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| Affiliation: | 1. School of Civil Engineering, Henan University of Technology, Zhengzhou 450001, China;2. Grain and Oil Storage Construction and Safety Key Laboratory of Henan Province, Zhengzhou 450001, China |
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| Abstract: | The over-pressure of storage material on silo under earthquake is one of the reasons for silo damage. In order to study the seismic response characteristics and variation law of stored materials under earthquake, shaking table tests were carried out on the column-supported silo model with a scale of 1∶25 under unidirectional and bidirectional earthquake.The dynamic lateral pressure distribution law and over-pressure coefficient of silo wall are revealed, and the calculation method of dynamic lateral pressure of silo wall is established. The results show that: (1) during the earthquake, the movement of the stored material in the silo lags behind the silo wall, and the lag is gradually obvious with the continuous earthquake motion. and the lag along the top to the bottom of the silo wall continues to weaken; (2) the law of dynamic lateral pressure distribution is related to the location of measuring points and the input mode of seismic waves; (3)The test value of the over-pressure coefficient at the top of the silo is larger than that adopted by the code, and the correction coefficient adopted in the current code is too small. (4) only based on unidirectional seismic excitation, it is not enough to truly reflect the dynamic characteristics of silo storage under earthquake, and bidirectional seismic action should not be ignored in silo structure strength design. The research results can provide reference and basis for the seismic design of column-supported silos. |
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| Keywords: | column supported silo lateral pressure of silo wall shaking table test stored material dynamic response |
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