关于建筑结构可靠度指标β计算公式的讨论

The Discussion of Calculating Formula of Building Structure Reliability Index

通过对建筑结构可靠度指标β计算精度的分析讨论,阐述了计算可靠度指标β时,由于忽略了相关系数而产生的局限性。给出了该公式的计算误差,并用实例进行了验证,说明了在建筑结构可靠度分析中,大多数情况下考虑混合项使分析计算更加精确、合理。

Through the analysis and discussion of calculating accuracy ofstructural reliability index β,the limitation of using this formula forcalculation reliability index is expounded.The calculation error of this formulais given and the checking work is done by an practical example.It shows thatthe mixed term β is more accurate and reasonable in some cases.