含非连续加强圈覆土卧式容器的屈曲安全评价及影响因素分析

外压失效是覆土卧式容器的重要失效模式。通常,在其内部设置加强圈以提高部件的刚度,但部分工况条件下需要对连续的加强圈进行切割,这将影响覆土卧式容器的外压强度。以含非连续加强圈的卧式储罐为研究对象,针对某给定加强圈切割角度,计算得到了该部件的外压强度。同时,开展了外压屈曲强度相关因素的敏感度研究,包括加强圈的切割角度、有无腹板等。结果表明,容器的屈曲强度随着切割角度的增大而不断降低,其降低程度与切割角度直接相关;在非连续加强圈处布置腹板,可显著提高容器的临界失稳压力。

Buckling Safety Evaluation and Analysis of Influencing Factors of Underground External Pressure Vessels Containing Non-Continuous Reinforcement Rings

External pressure failure is an important failure mode of underground horizontal vessels.Usually,a reinforcement ring is arranged inside it to increase the rigidity of the component.However,it is required to cut the continuous reinforcement ring under some working conditions.This will affect the external pressure strength of the underground horizontal vessels.With the horizontal storage tank with non-continuous reinforcement ring as the research object,the external pressure strength of the component was obtained through calculation for the cutting angle of a given reinforcement ring.At the same time,the sensitivity of the factors related to the external buckling strength was studied,including the cutting angle of the reinforcement ring,the presence or absence of webs,etc.The results show that the buckling strength of the vessel decreased with the increase of the cutting angle,and the degree of reduction was directly related to the cutting angle;the arrangement of the web at the non-continuous reinforcement ring could significantly increase the critical instability pressure of the vessel.