【摘要】 我国《起重机设计规范》GB3811-83和《钢结构设计规范》TJ17-74修订本征求意见稿,对单向压弯构件的平面内稳定计算各自提出了验算公式.本文剖析了这两个公式,比较了它们的推导过程和计算结果.认为《起重机设计规范》的公式较好,用它计算的结果更好地反映了实际应力情况,同时物理概念明确.为了便于公式运算,文中给出了新的轴压稳定系数表,供直接查用.更多还原

【Abstract】 The 《Design Norms for Cranes》 GB3811—83 and the revised edition of 《Code of Steel Structure》 TJ17—74 have submitted two different formulas to calculate the instability of axial compression and bending member. This paper has analysed both formulas and compared their processes of deduction and their results of calculation.It is pointed out that, GB3811—83 Norms’ formula is better than the other one. Its physical concept is clear, itsresults of calculation coincide with the actual stress. For the sake of convenience,this paper substitutes ables of new coefficient Φ for the tables of old coefficient ?.更多还原