Calculating Method on Storage Side Pressure of Silo Structures under Earthquake

DOI：

 作者 单位 周长东?覮，张泳，邱意坤，梁立灿，阿斯哈 （北京交通大学 土木建筑工程学院，北京 100044）

为了对筒仓结构进行合理的抗震设计，得到实际工程中实用的贮料侧压力，引入“施卫星”地震作用下贮料侧压力计算方法，以工程设计中能够获得的材料参数为基础，确定贮料侧压力计算中所需要的修正参数；然后利用ABAQUS建立筒仓结构数值模型进行计算分析，根据获得的贮料侧压力变化曲线拟合得出相应参数的修正值；综合不同参数，归纳出考虑筒仓-贮料相互作用的贮料侧压力修正公式；最后，将贮料侧压力修正公式所得的计算值与既有试验数据及规范设计值进行对比分析. 结果表明，采用本文公式得到的计算值与试验值吻合较好，能够真实合理地反映实际地震作用下贮料侧压力分布；考虑强震作用下贮料侧压力按照规范设计值设计偏于危险，而按照本文计算公式设计更加经济可靠.

In order to get reasonable seismic design for silo structures and obtain the practical calculated value of storage side pressure, the “Shi Weixing” calculation method of storage side pressure under the earthquake is introduced at first. Based on the material parameters which can be obtained in engineering design, the revised parameters needed in the calculation of storage side pressure are determined. Then, the numerical model of silo structure is established with ABAQUS to calculate the side pressure variation curve and the correction values of the corresponding parameters are obtained by curve fitting. Modified formulas of side pressure considering silo-storage interaction are summarized by synthesizing different parameters. Finally, the calculated values obtained from the modified formula of storage side pressure are compared with the existing test data and the design values of the code. The results show that the calculated values are in good agreement with the experimental values and can reflect the real and reasonable storage side pressure. Compared with the results, the storage side pressure under the action of strong earthquake is dangerous according to the design value of the code, which means that the proposed calculation formula in this paper is more economical and reliable.