水泥混凝土道面可靠性设计指标计算方法OA
Calculation Method of Reliability Design Index of Cement Concrete Pavement
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.
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.
王占盛;杨淑梅;戎虎仁;杨定强
中铁二院工程集团有限责任公司,成都 610031山西大学电力与建筑学院,太原 030031中铁第六勘察设计院集团有限公司,天津 300308
土木建筑
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
cement concrete pavementreliability designreliable indexsub-coefficientsafety factorimproved algorithm
《路基工程》 2024 (004)
11-17 / 7
国家自然科学基金青年项目:微震与单向冻融耦合作用对川藏铁路层状岩石损伤累积效应及其失稳破坏机理研究(51908344);中国博士后基金项目:短周期多频次冻融岩石空隙结构演化规律及微观损伤机理研究(2018M643821XB);中铁二院科研项目:高原机场场道设计方法适用性研究(KSNQ213021-1)
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