摘要
概率极限状态设计表达式中的抗力分项系数反映了结构抗力的主要影响因素的变异性,其取值合理与否直接关系到结构可靠度设计的精确性。由于我国现行公路钢桥设计规范已经过时,新的规范中采用概率极限状态设计方法势在必行。故本文在对现行规范下公路钢桥结构五种基本受力构件的可靠指标校准的基础上,优化计算了各类构件的抗力分项系数,并将结果与国内外相关规范的取值进行了比较和分析,给出了建议取值。
The resistance factor in the probability limit state design formula reflects the uncertainty of the major influence elements of structural resistant force. Whether the value of the resistance factor is reasonable closely links with the precision of the structural reliability design. The reliability based probability limit state design method will be covered in the new steel highway bridge design code because the current design code is outdated. Hence, in this paper, the resistance factors of members under five typical loads are optimized based on the calibration analysis of them. Then the results are contrasted to the values in other codes from China and abroad. At last, the recommended resistance factors of steel highway bridge are put forward.
出处
《华中科技大学学报（城市科学版）》
CAS
2008年第4期185-188,共4页
Journal of Huazhong University of Science and Technology
关键词
公路钢桥
可靠度
极限状态
抗力分项系数
steel highway bridge
reliability
limited state
resistant factors
