东南大学学报（自然科学版）2023，Vol.53Issue(6)：965-972,8.DOI:10.3969/j.issn.1001-0505.2023.06.002
混凝土结构预应力服役离散性分析与性能评价方法
Service dispersion analysis and performance evaluation method of prestress of concrete structure
摘要
Abstract
The probability distribution characteristics of effective prestress in single-bar prestressed concrete structures based on engineering field data was verified.A Gaussian mixture theory-based probabilistic analysis model for structural prestress systems was proposed.The criterion for normal significance controlled by kurto-sis,skewness,and function difference was determined and a simplified normal analysis method based on Gaussian mixture modeling was proposed for engineering sampling.An evaluation method for the effective prestress state and service performance of structures based on the data was established with the constraint pa-rameter of a 95％guarantee rate.The results show that the probability distribution of effective prestress of structure can be approximated by a single normal or several sub distribution Gaussian mixture model.Imposing 95％guarantee rate as a constrained parameter can resolve the contradiction between estimation accuracy and measured efficiency,and meet the requirements of engineering testing,which achieves a scientific and quanti-tative analysis of prestressed service dispersion.关键词
预应力混凝土结构/服役离散性/高斯混合模型/判定准则/性能评价方法Key words
prestressed concrete structure/service dispersion/Gaussian mixture model/normality criterion/performance evaluation methods分类
建筑与水利引用本文复制引用
曾滨,许庆,徐晓达,李嘉伟..混凝土结构预应力服役离散性分析与性能评价方法[J].东南大学学报（自然科学版）,2023,53(6):965-972,8.基金项目
十四五国家重点研发计划资助项目(2022YFC3801800)、国家自然科学基金资助项目(52038010,52178184). （2022YFC3801800）
