摘要
作为一种新型储粮仓,半地下双层浅圆仓可以保证粮食品质,具有节地、节能、低碳的优势。本文采用数值模拟的方法分析了半地下双层浅圆仓在正常使用阶段时不同工况条件下的应力与位移,并分别对上下两层在不同静态储粮高度下的力学性能进行了研究。结果表明:全仓空仓为最不利工况,根据位移云图分析应优先在地下仓装粮;地上层仓壁受力随着储粮高度的增加而增加,在仓壁距中间层1/4处至中间层处显著增大;地下层仓壁受力随着储粮高度的增加而减小,在仓壁与仓底接触处达到最大值;中间层在中心筒和外侧处应力最大,仓底在距外侧1/3处应力最大。该研究可为半地下双层浅圆仓工程设计与安全储粮提供理论支持与技术指导。
A new type of grain silo,the semi-underground,double-storey squat silo(SUDSSS)can ensure grain quality and offers the advantage of saving land and energy,besides producing low carbon emission.Numerical simulations were used to analyze the stress and displacement of the SUDSSS under different working conditions during normal operation.The mechanical properties of the upper and lower storeys of the SUDSSS were studied under different static grain storage heights.The results show that an empty silo is the most unfavorable condition and that the underground silo should be prioritized during grain loading,according to the displacement cloud analysis.The stress on the silo wall of the upper storey(above the ground surface)increases as the grain storage height increases,and this stress increases significantly from 1/4 the wall to middle layer.The stress on the underground silo wall of the lower storey(underground)decreases as the grain storage height rises,and the maximum value is reached at the contact point between the wall and the bottom of the silo.The stress on the middle layer is the largest at the center cylinder and on the outer side,and the stress at the bottom of the silo is the largest at 1/3 the distance from the outer side.Our study provides theoretical support and technical guidance for the optimal engineering design of an SUDSSS.
作者
金立兵
张为博
吴强
王振清
李闯
焦鹏飞
JIN Libing;ZHANG Weibo;WU Qiang;WANG Zhenqing;LI Chuang;JIAO Pengfei(Institute of Long-term Performance on Concrete Structures,Henan University of Technology,Zhengzhou 450001,China;Design and Research Academy,Henan University of Technology,Zhengzhou 450001,China)
出处
《现代食品科技》
CAS
北大核心
2023年第8期142-147,共6页
Modern Food Science and Technology
基金
国家自然科学基金项目(51509084)
河南省省重点研发与推广专项(212102110191,212102110200)。
关键词
双层浅圆仓
半地下
正常使用阶段
装粮高度
数值分析
混凝土结构
double-storey squat silo
semi-underground
regular service stage
grain height
numerical simulation
reinforced concrete
