基于Weibull模型的混凝土冻融损伤寿命预测及应用  

Prediction and application of freezing-thawing damage life of concrete based on Weibull model

作　　者：杨冬鹏 郭卫民 王宝民[3] YANG Dongpeng;GUO Weimin;WANG Baomin(Liaoning Water Conservancy and Hydropower Survey and Design Research Institute Co.,Ltd.,Shenyang 110006,China;Liaoning Transportation Planning and Design Institute Co.,Ltd,Shenyang 110166,China;School of Civil Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]辽宁省水利水电勘测设计研究院有限责任公司,辽宁沈阳110006 [2]辽宁省交通规划设计院有限责任公司,辽宁沈阳110166 [3]大连理工大学土木工程学院,辽宁大连116024

出　　处：《水利学报》2022年第8期977-983,共7页Journal of Hydraulic Engineering

基　　金：辽宁省重点研发计划项目(2020JH210100016)。

摘　　要：对北方严寒和寒冷地区水工混凝土结构而言,其抗冻性能是混凝土耐久性最具代表性的指标,也是影响工程实体服役寿命的关键因素。为了能够准确预测既有混凝土构筑物的使用寿命,本文以冻融损伤理论为基础,采用棱柱体试件进行了混凝土快速冻融物理模型试验,建立了基于Weibull模型和混凝土快速冻融试验的混凝土冻融损伤模型。基于该模型提出一种迭代逼近的混凝土寿命预测方法,通过室内试验和实际工程案例进行验证。结果表明:通过所建立损伤模型得到的冻融损伤预测值和试验实测值基本吻合,提出的寿命预测方法得到的预测数据较为可靠。For hydraulic concrete structures in the cold region of north China,the frost resistance is the most representative indicator of concrete durability and a key factor affecting the service life of engineering entities.In order to accurately predict the service life of existing concrete structures,based on the freeze-thaw damage theory and prism specimens,a concrete freeze-thaw damage model based on Weibull model and concrete rapid freeze-thaw test is established in this paper.Based on this model,a life prediction method based on iterative approximation is proposed,which is verified by laboratory tests and actual engineering cases.The results show that the predicted value of freezing-thawing damage obtained by the damage model established in this paper is basically consistent with the measured value,and the predicted data obtained by the proposed life prediction method is relatively reliable.

关 键 词：水工混凝土 Weibull模型 冻融损伤 寿命预测 

分 类 号：TV431[水利工程—水工结构工程]