基于检测数据的在役水工钢闸门主梁可靠度分析  

Reliability analysis of main beam for in-service steel gate based on detection data

作　　者：刘云俊 杨建明[1] 叶小强[2] 

机构地区：[1]苏州市水利设计研究院有限公司,江苏苏州215004 [2]南京水利科学研究院,江苏南京210024

出　　处：《人民长江》2010年第17期88-91,共4页Yangtze River

摘　　要：对在役水工钢闸门进行安全评估时,往往采用传统的、单一的"锈蚀速度"来表征结构抗力变化过程,方法过于简单。以某平原水利枢纽的节制闸平面钢闸门服役10 a后的检测为例,提出采用DM4DL型超声波金属厚度检测仪测量钢板蚀余厚度,并对检测数据当量正态化,获得供可靠度分析用的厚度分布函数,通过蒙特卡罗抽样随机有限元分析,计算当前钢闸门主梁的可靠度指标,以此判定当前的钢闸门是否安全。In the safety assessment of in-service steel gate,only corrosion rate is used to indicate the change process of structural resistance traditionally,which is rather simple.Taking the detection data of plane steel gate for a regulation sluice that has been serving for 10 years as an example,we detect the residual thickness of steel plate with DM4DL ultrasonic metal thickness detector,and then perform the equivalent normalization for the detection data to provide thickness distribution function for reliability analysis.Through Monte Carlo sampling stochastic finite element analysis,the reliability indicator of main beam of the current steel gate is calculated,according to which we can make judgment on whether the steel gate is safe or not.

关 键 词：当量正态化 可靠度分析 蒙特卡罗法 钢闸门 

分 类 号：TV663.4[水利工程—水利水电工程]