摘要
采用拉丁超立方抽样(LHS)对多种混凝土时效模式的不确定性进行了模拟研究.首先总结了已有的混凝土时效模式不确定性的研究,比较了常用的三种混凝土时效模式的不确定性.然后介绍了不确定性分析的LHS模拟方法.最后采用LHS模拟了给定条件的混凝土时效计算模式、混凝土材料和外部环境的不确定性,并对不同混凝土时效模式的模拟结果进行了比较.研究结果表明:在对混凝土结构的收缩不确定性预测时,采用B3模式较好;在对混凝土结构的徐变不确定性预测时,采用CEB-FIP90模式较好.
Latin hypercube sampling based uncertainty simulation of different concrete time effect models was researched in this paper. Firstly, the past results of uncertainties of concrete time effect models were summarized. The three models uncertainties of the concrete time effect were compared. Then the simulation method of Latin Hypercube Sampling （LHS） was introduced. The uncertainties of the concrete time effect model, the given concrete properties and the given ambient environment were simulated by the LHS. And the simulated results were analysed. The results indicate that B3 model and CEB - FIP90 model are preferred to forecast the uncertainties of the concrete shrinkage and creep respectively.
出处
《南昌大学学报（工科版）》
CAS
2007年第1期83-86,90,共5页
Journal of Nanchang University(Engineering & Technology)
关键词
混凝土
时效
收缩
徐变
不确定性
拉丁超立方抽样
concrete
time effect
shrinkage
creep
uncertainty
latin hypercube sampling（LHS）
