水平振动荷载下颗粒运动的响应分析
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摘要
基于二维振动试验,通过检测小颗粒从大颗粒之间孔隙中下沉的坚果效应,研究了在水平振动荷载下砂石层中颗粒位移的动力响应情况。结果表明:散体材料垫层的耗散性能与颗粒位移量有关,颗粒位移动力响应的关键在于激振力大小及颗粒堆中剪阻强度的强弱。
Based on the two-dimensional vibration test,the dynamic response of granules displacement in the gravel layer is researched,in the case of the level vibration loads by detecting the nuts effect of small granules sinking through the pores between large granules.The findings indicate that energy dissipation properties of the granular material cushion are related to particle displacement,and the key of the dynamic response of particle displacement is the vibrating force and the shear resistance in the granules heap.
Based on the two-dimensional vibration test,the dynamic response of granules displacement in the gravel layer is researched,in the case of the level vibration loads by detecting the nuts effect of small granules sinking through the pores between large granules.The findings indicate that energy dissipation properties of the granular material cushion are related to particle displacement,and the key of the dynamic response of particle displacement is the vibrating force and the shear resistance in the granules heap.
引文
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[2]蒋红英,鲁进步,慕青松.颗粒材料结构自组织沉降细观研究[J].桂林理工大学学报,2010,30(4):556-560.
[3]蒋红英,刘杰,柯志华,等.正交试验法在颗粒材料堆自组织分析中的应用[J].甘肃科学学报,2008,20(3):122-125.
[4]Tsai J C,Voth G A,Gollub J P.Internal granular dynamics,shear-induced crystallization,and compaction steps[J].Physical Review Letters,2003,91(6):064301.
[5]蒋红英,杨小强,鲁进步,等.水平地震荷载下散体材料结构响应分析[J].四川建筑科学研究,2010(4):175-178.
[6]Hong D C,Quinn P V.Reverse Brazil nut problem:compe-tition between percolation and condensation[J].PhysicalReview Letters,2001,86(15):3423-3426.
[7]刘嘉焜,王公恕.应用随机过程[M].北京:科学出版社,2000.
[8]林元烈.应用随机过程[M].北京:清华大学出版社,2002.
[9]Nerone N,Aguirre M A,Calvo A,et al.Instabilities inslowly driven granular packing[J].Physical Review E,2003,67(1):011302.
[10]邹颖娴.砂砾石垫层隔震性能研究[D].西安:西安建筑科技大学,2006.
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