考虑散粒体与仓壁相互作用时筒仓的动力计算
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摘要
本文在计算地基运动时筒仓的动力响应时 ,考虑了仓内散粒体与仓壁的相互作用对其的影响。根据实验观测到的现象 ,将仓内上部占总质量 2 0 %～ 30 %的散粒体处理为几个集中质量并将其分别与仓壁均匀弹性连接 (弹性杆只承受压力而不承受拉力 ) ,分析地基运动时筒仓的动力响应 (仓壁位移值 )并与筒仓模型实测值进行了比较 ,两者结果吻合较好
This paper calculates the silo's dynamic response when foundation moves, taking into account the effect of interaction between the bulk solid and the silo wall. Based on the phenomena observed in the experiments conducted by the author and other researchers, it is supposed that the bulk solid in the upper part of the silo, which makes up about 20%~30% of the total mass, is equivalent into several concentrated masses. Furthermore, each concentrated mass is uniformly connected to the silo wall through elastic bars, which can only bear compressive force instead of tensile force. The calculated dynamic response (i.e. displacements of the silo wall) when foundation moves is compared with the experimental result, showing a good agreement between the two.
This paper calculates the silo's dynamic response when foundation moves, taking into account the effect of interaction between the bulk solid and the silo wall. Based on the phenomena observed in the experiments conducted by the author and other researchers, it is supposed that the bulk solid in the upper part of the silo, which makes up about 20%~30% of the total mass, is equivalent into several concentrated masses. Furthermore, each concentrated mass is uniformly connected to the silo wall through elastic bars, which can only bear compressive force instead of tensile force. The calculated dynamic response (i.e. displacements of the silo wall) when foundation moves is compared with the experimental result, showing a good agreement between the two.
引文
[1] GBJ117-88工业构筑物抗震鉴定标准[S].工程建设规范汇编45.结构设计与施工规范,北京:中国建筑工业出版社,1992.
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[3] 施卫星,米伯龙.地震动下煤仓贮料侧压力研究[J].特种结构,1993,(1):16—18.
[4] PeterKnoedel,ThomasUmmenhofer andUlrichSchulz.On the modelling of different types ofimperfections in silo shells[J].Thin- walledStructure,1995,23:283-293.
[5] 黄义,尹冠生,等.不同地基条件下筒仓的振动实验研究[A].第七届全国振动理论及其应用学术会议论文集[C],1999,佛山.
[6] 赵衍刚,吉田顺.振动时筒仓中散粒体流动状况的仿真[J].地震工程与工程振动,1993,13(3):17—27.
[7] 居荣初,曾心传.弹性结构与液体的耦联振动理论[M].北京:地震出版社,1983.
[8] Γ.Κ.克列因著,陈万佳译.散粒体结构力学[M].北京:中国铁道出版社,1983.
[2] 马英儒.筒仓抗震验算的简化方法.工程抗震[M],1988.
[3] 施卫星,米伯龙.地震动下煤仓贮料侧压力研究[J].特种结构,1993,(1):16—18.
[4] PeterKnoedel,ThomasUmmenhofer andUlrichSchulz.On the modelling of different types ofimperfections in silo shells[J].Thin- walledStructure,1995,23:283-293.
[5] 黄义,尹冠生,等.不同地基条件下筒仓的振动实验研究[A].第七届全国振动理论及其应用学术会议论文集[C],1999,佛山.
[6] 赵衍刚,吉田顺.振动时筒仓中散粒体流动状况的仿真[J].地震工程与工程振动,1993,13(3):17—27.
[7] 居荣初,曾心传.弹性结构与液体的耦联振动理论[M].北京:地震出版社,1983.
[8] Γ.Κ.克列因著,陈万佳译.散粒体结构力学[M].北京:中国铁道出版社,1983.
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