【摘要】 以Penzien集中质量模型为基础建立了某圆柱形锚固储罐考虑桩-土-罐相互作用及罐壁柔性的简化分析模型,采用有限元软件ABAQUS建立了该桩-土-罐力学模型,分析了其自振特性及在水平基岩波激励下的动力响应。分析结果得知,相比于刚性地基,考虑桩土相互作用的储液罐对流频率几乎不变,第一阶柔性脉动频率略有减小;在动力响应方面,储液罐基底剪力和力矩最大值略有减小,但其对流分量和刚性脉动分量最大值均有增大,所以本文建议在储液罐进行设计时应充分考虑桩土相互作用后储罐动力响应的有利和不利变化,从整体上把握来确保储液罐的抗震安全性。更多还原

【Abstract】 Based on Penzien’s lumped mass model,the simplified mechanical model of a cylindrical anchored storage tank which has taken into account the effects of soil-pile interaction and tank wall flexibility was established,the FEM(finite element method) software ABAQUS was used to establish the soil-pile-tank mechanical model,the natural vibration properties and dynamic response under bedrock seismic wave was analyzed.Comparing with the resultant of storage tank mounted on rigid foundation,when considering the soil-pile interaction,the convective frequency was almost invariant,the first order flexible impulsive frequency was reduced slightly;for dynamic response,the maximum value of total base shear force and moment of the storage tank was decreased slightly,but the maximum value of its convective component and rigid impulsive component were increased.Therefore,the paper suggests that the favorable and unfavorable changes of dynamic response after considering soil-pile interaction should be fully considered in design of storage tank to ensure the seismic safety.更多还原