基于污染分布可靠度分析中分项系数的确定

周冲^1,2, 寇新建¹

1.上海交通大学船舶海洋与建筑工程学院;2.中国建筑上海设计研究院有限公司



摘要:

为研究人因误差影响下的结构可靠性设计分项系数,应用污染分布模型来确定随机误差和人因误差作用下的结构参数变量X的均值与方差.并在此定量分析的基础上合理地确定结构可靠度分析中的分项系数值.研究结果表明:目前的可靠度分项系数研究中没有考虑施工过程中人因误差这一不确定性因素的影响,其研究结果与实际情况存在偏差.在不确定性因素的影响下,为保证建筑结构可靠度达到即定的安全水平,在相应的目标可靠度指标β下,必须合理准确地确定其安全分项系数.

关键词:  结构可靠度  分项系数  人因误差  污染分布模型

DOI：10.11918/j.issn.0367-6234.2011.02.025

分类号:TU311.2

基金项目:



Determination of partial safety coefficients of structural reliability based on contaminated distribution

ZHOU Chong^1,2, KOU Xin-jian¹

1.School of Naval Architecture,Ocean and Civil Engineering,Shanghai Jiao Tong University,200240 Shanghai,China;2.China Shanghai Architectural Design & Research Institute Co.,Ltd.,200063 Shanghai,China)

Abstract:

In order to study the partial safety coefficient concerned the effect of human error in construction.The contaminated distribution model was employed to obtain the realistic mean value and standard variance of variable X of structural parameters which coexisted with random error and human error.The reasonable partial safety coefficient can be calculated based on the realistic value of structural parameters concerned the effects of random error and gross error.The results show that the current studies of partial safety factors do not consider human error in construction for structural reliability.It is not comply with the real situation.Partial safety factors must be evaluated precisely for the given target β to ensure the certain level of structural reliability due to uncertain factors.

Key words:  structural reliability  partial safety factors  human error  contaminated distribution model