摘要
结构抗浮可靠度与自重变异系数、联合抗浮时自重与总抗拔力的比值和锚固构件抗拔力变异系数有密切的关系。首先建立极限状态方程,采用蒙特卡罗法,分析了使用期内甲级、乙级、丙级的抗浮工程,在压重法抗浮下的不同自重变异系数、联合抗浮时自重与总抗拔力的不同比值和不同锚固构件抗拔力变异系数下的可靠指标。结果表明,可靠指标随自重变异系数的增大而减少;自重与总抗拔力的比值在0.80以下时,可靠指标变化不大,自重与总抗拔力的比值大于0.8时,可靠指标随自重与总抗拔力的比值的增大而显著减小;可靠指标随锚固构件抗拔力变异系数的增大而减少,且减少的幅度较大。
The reliability of structural anti-floating is closely related to the variation coefficient of gravity loads,the ratio of gravity loads to total pullout resistance as well as the variation coefficient of pullout resist-ance.In this paper,the limit state equation was established by the Monte Carlo method.And the anti floating works with Class A,class B and class C during the service life were studied by gravity anti-floating based on variation coefficient of gravity loads,the ratio of gravity loads to pullout resistance as well as the variation coeffi-cient of pullout resistance of.It can be concluded that the reliability index decreases with the coefficient of vari-ation of gravity loads.The reliability index changes little,if the ratio of gravity loads to total pullout resistance below 0.80.Otherwise,it would be decreases significantly.The reliability index decreases significantly with the increasing of variation coefficient of pullout resistance.
作者
宋欢艺
Song Huanyi(Guangzhou Municipal Engineering Design and Research Institute Co.,Ltd.,510060,China)
出处
《特种结构》
2023年第2期21-24,共4页
Special Structures
关键词
蒙特卡罗法
结构抗浮
可靠度
变异系数
可靠指标
The Monte Carlo method
Structural anti-floating
Reliability
Variation coefficient
Reliability index
