摘要
本文通过引入荷载粗糙度指标，根据有关统计参数讨论了灾害荷载的特性，研究了灾害荷载下结构体系失效模式的相关性及可靠度的近似计算方法，得到了以下结论：灾害荷载下结构体系的失效模式近似完全相关，结构体系可靠度由结构的最弱失效模式决定。
The structural system reliability is an important factor of the structural overall performance. However, in civil engineering the concept of structural system reliability still stays at the stage of theoretical analysis, and there are hardly any practical applications due to the difficulties in calculation. With the high redundancy of civil engineering structures, the number of failure modes is numerous and the correlation between them is very complex. In the present paper, the property of hazard loads is studied by introducing the factor-load Roughness Index. Correlation between structural failure modes and the approximate approach of structural system reliability under hazard loads are studied. The following conclusions are reached: the structural failure modes under hazard loads are fully correlated and thus the structural system reliability under hazard loads can be determined by the weakest failure mode.
出处
《工程力学》
EI
CSCD
北大核心
2001年第3期1-9,共9页
Engineering Mechanics
基金
国家自然科学基金(59895410)
关键词
结构体系可靠度
灾害荷载
荷载粗糙度指标
相关性
Approximation theory
Civil engineering
Correlation methods
Failure analysis
Redundancy
