A. 可靠度水平的设置应根据结构构件的安全等级、失效模式和经济因素等确定
B. 对结构的安全性和适用性应采用相同的可靠度水平
C. 当有充分的统计数据时，结构构件的可靠度宜采用可靠的指标β度量
D. 结构构件设计时采用的可靠指标，可根据对现有结构构件的可靠度分析，并结合使用经验和经济因素等确定
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