柱承式立筒排仓贮料侧压力地震响应试验研究
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TU312;TU399

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河南省粮油仓储建筑与安全重点实验室开放课题(2016 KF-A01)


Experimental study on seismic response of lateral pressure of column-supported group silos
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    摘要:

    为研究立筒排仓贮料对仓壁动态侧压力的地震响应规律,设计制作了缩尺比例为1:25的柱承式立筒排仓和独立单仓模型,进行了3条地震波下不同地震动水准的振动台试验,分析获得两种模型的贮料地震响应特性、仓壁动态侧压力的变化规律与超压系数。研究结果表明:1)地震时仓内贮料与仓壁存在的相位差与仓体位置及测点位置相关;2)边仓与中仓仓壁动态侧压力的分布规律与地震波输入方向有关;排仓的超压系数总体上小于独立单仓;3)边仓的超压系数大于中仓,两者均大于规范采用值,现行规范中所采用的综合修正系数偏小;4)独立单仓不能全面反映立筒排仓的贮料地震响应特性,考虑排仓中不同位置单仓及地震作用方向进行仓壁结构的强度设计十分必要。

    Abstract:

    In order to study the seismic response of group silos stored materials to the dynamic lateral pressure of the silo wall, column-supported group silos and independent single silo models with a scale ratio of 1:25 were designed and manufactured, and shaking table tests with different ground motion levels under three seismic waves were carried out. The seismic response characteristics of the two models, the variation law of dynamic lateral pressure and over-pressure coefficient of the silo wall were obtained. The results show that:1) during the earthquake, the phase difference between the storage and the wall of the silo is relevant with the position of the silo body and the location of the measuring point; 2) the distribution law of the dynamic lateral pressure on the wall of the side silo and the middle silo is relevant with the direction of seismic wave input; on the whole, the over-pressure coefficient of the silo is generally smaller than that of the independent single silo; 3) the over-pressure coefficient of the side silo is larger than that of the middle silo, both of which are larger than the values adopted by the code, and the comprehensive correction coefficient adopted in the current code is relatively small; 4) the storage seismic response characteristics of the vertical silo cannot be fully reflected only via the independent single silo, therefore it is essential to consider the different positions of the silo and the direction of seismic action to design the strength of the silo wall structure.

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丁永刚,骆倩,许启铿,李学森,刘强.柱承式立筒排仓贮料侧压力地震响应试验研究[J].土木与环境工程学报(中英文),2021,43(3):167-173. DING Yonggang, LUO Qian, XU Qikeng, LI Xuesen, LIU Qiang. Experimental study on seismic response of lateral pressure of column-supported group silos[J]. JOURNAL OF CIVIL AND ENVIRONMENTAL ENGINEERING,2021,43(3):167-173.10.11835/j. issn.2096-6717.2020.181

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  • 收稿日期:2020-07-17
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  • 在线发布日期: 2021-04-09
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