水泥混凝土道面可靠性设计指标计算方法
Calculation Method of Reliability Design Index of Cement Concrete Pavement
王占盛 1杨淑梅 1戎虎仁 2杨定强3
作者信息
- 1. 中铁二院工程集团有限责任公司,成都 610031
- 2. 山西大学电力与建筑学院,太原 030031
- 3. 中铁第六勘察设计院集团有限公司,天津 300308
- 折叠
摘要
基于水泥混凝土道面可靠性设计指标的计算方法,分析目前计算方法存在的问题与不足,并提出算法的改进.我国工程结构设计标准提供的可靠指标基本采用安全系数换算、分项系数基本采用安全系数或可靠指标换算,该算法可能存在不同设计状况的设计结果不符合可靠性宏观规律、不同设计指标的设计结果不具有一致性的问题,原因在于可靠性设计指标的计算忽视了设计变量之间的相关性;将变量间相关性纳入工程整体可靠度考虑,改进得到的可靠指标与分项系数计算式具有更好的适用性;应用到水泥混凝土道面工程,通过抗力性质判断变量之间是否具有相关性,再分别定量统计相关系数值,最后通过改进算法计算可靠性指标的适宜值.
Abstract
Based on the calculation method of reliability design index of cement concrete pavement,the problems and shortcomings of the current calculation method are analyzed,and the improvement of the algorithm is proposed.The reliability index provided by engineering structure design standard in China is basically converted by safety factor,and the sub-coefficient is basically converted by safety factor or reliability index.There may be problems that the design results of different design conditions do not conform to the macro law of reliability,and the design results of different design indexes are inconsistent.The reason is that the calculation of reliability design index neglects the correlation between design variables.Taking the correlation between variables into consideration of the overall reliability of the project,the improved reliability index and the sub-coefficient calculation formula have better applicability.Applied to the cement concrete pavement engineering,the correlation between the variables is judged by the resistance property,and then the quantitative statistics of related coefficient value is carried out respectively,and finally the appropriate value of the reliability index is calculated by the improved algorithm.
关键词
水泥混凝土道面/可靠性设计/可靠指标/分项系数/安全系数/改进算法Key words
cement concrete pavement/reliability design/reliable index/sub-coefficient/safety factor/improved algorithm引用本文复制引用
基金项目
国家自然科学基金青年项目(51908344)
中国博士后基金项目(2018M643821XB)
中铁二院科研项目(KSNQ213021-1)
出版年
2024
国家科技期刊平台
NSTL
万方数据