对立式圆筒形储罐标准GB 50341—2014中某些问题的探讨

On Some Issues of GB 50341-2014 for Vertical Cylindrical Storage Tanks

GB 50341—2014在执行过程中,被发现某些规定条款存在问题、个别计算公式存在笔误。文章结合工程实际,将该标准实施以来所遇到的主要问题以及个人的理解和修改建议归纳为八个部分,即自支撑式罐顶顶与壁的非弱连接属性、罐顶与罐壁连接处有效截面面积A计算公式对于不同材料的适用性、计算破坏压力P f计算公式错误、外压储罐在拱顶板计算厚度及其抗压(拉)环所需面积A r无需满足常压储罐的要求、标准正文与附录B关于罐壁稳定计算不一致、外压储罐罐壁的设计风压W计算值过小、外压增加时罐壁加强圈数量不增反降以及对带肋拱顶计算公式的修改建议等,并分别加以分析与讨论。

During the implementation of GB 50341 edition 2014,problems with certain provisions and some errors in several calculation formulas have been discovered gradually.Combining with engineering design practice,this paper summarizes the main issues encountered,personal understanding and revision suggestions into 8 parts for analysis and discussion,which includes the characteristic of none weak roof-to-shell attachment(frangible joint)of self-supporting roofs,suitability of the formula of the roof-to-shell joint cross-sectional area(A)to austenitic stainless steels,an error appeared in the formula of the calculated failure pressure Pf,no need of the calculation thickness of the roof and the total required cross-sectional area(Ar)in roof-to-shell junction region for external pressure tanks compliant to the requirements of atmospheric tanks,the inconsistency between the body text and Appendix B of the standard on the calculation of the shell stability,too small calculated value of the design wind pressure on shells of external pressure tanks,shell stiffener quantity decrease instead of increase along with the ascending of the external pressure,and the modification suggestions for the calculation formula of ribs-stiffening domes.