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工程力学  2013 

偏心卸料下大直径浅圆仓侧压力计算

DOI: 10.6052/j.issn.1000-4750.2012.04.0251, PP. 67-77

Keywords: 混凝土筒仓,偏心卸料,库伦土压力,侧压力,不对称性

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Abstract:

为了研究偏心卸料下浅圆仓侧压力的计算方法,该文基于Coulomb土压力理论,结合《钢筋混凝土筒仓设计规范》(GB50077-2003)中附录C关于满仓时浅圆仓的侧压力计算方法,给出并分析了可能出现的5种工况,针对各工况下的计算公式进行详细的推导。考虑偏心卸料下筒仓仓壁的侧压力沿环向分布的不均匀性,提出了侧压力环向分布的力学模型。最后结合两个计算实例,将公式计算结果与有限元结果进行了对比,分析了偏心卸料对筒仓内力的不利影响。理论解与有限元结果吻合较好,检验了该文所推公式的正确性;偏心卸料下筒仓仓壁的水平弯矩较满载下更为不利,而环向轴力也有可能出现比满载下更不利的结果,结果验证了筒仓设计考虑偏心卸料作用的必要性。所提计算方法可供相关实际工程参考。

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