[1]刘兆正,张合朋,吉庆伟,等.冻融环境下水工混凝土结构碳化时变可靠度分析[J].江苏水利,2021,(06):17-22.
　LIU Zhaozheng,ZHANG Hepeng,JI Qingwei,et al.Time-varying reliability analysis of carbonation of hydraulic concrete structures under freeze-thaw conditions[J].JIANGSU WATER RESOURCES,2021,(06):17-22.
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冻融环境下水工混凝土结构碳化时变可靠度分析()
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《江苏水利》[ISSN:1006-6977/CN:61-1281/TN]

卷:
期数:
2021年06期
页码:
17-22
栏目:
水利工程建设
出版日期:
2021-06-23

文章信息/Info

Title:
Time-varying reliability analysis of carbonation of hydraulic concrete structures under freeze-thaw conditions
文章编号:
1007-7839(2021)06-0017-06
作者:
刘兆正1;  张合朋1;  吉庆伟1;  侯利军2;  周元斌1
(1.江苏省骆运水利工程管理处, 江苏 宿迁 223800; 2.河海大学 港口海岸与近海工程学院, 江苏 南京 210098)
Author(s):
LIU Zhaozheng1;  ZHANG Hepeng1;  JI Qingwei1;  HOU Lijun2;  ZHOU Yuanbin1
(1.Luoyun Hydraulic Project Management Division of Jiangsu Province, Suqian 223800, China; 2.College of Harbor, Coastal and Offshore Engineering, Hohai University, Nanjing 210098, China)
关键词:
混凝土; 冻融; 碳化; 碳化模型; 可靠性
Keywords:
concrete;  freeze-thaw;  carbonation;  carbonation model;  reliability
分类号:
TU528.01
文献标志码:
A
摘要:
碳化作用是水工混凝土结构最为普遍的耐久性劣化因素。在寒冷地区,混凝土冻融损伤进一步加剧了碳化作用,特别在干湿交替部位更为严重。针对冻融环境下混凝土碳化问题,分析了服役龄期内冻融损伤混凝土的碳化时变可靠水平。结合已有混凝土碳化模型、混凝土冻融损伤模型、实验室与自然环境冻融相关关系等建立了冻融环境下混凝土碳化深度模型,进而结合相关变量的统计模型和数字特征,建立了碳化时变可靠度分析方法。然后,通过参数分析,研究了冻融、碳化残量、环境影响系数和混凝土部位对碳化时变可靠度的影响规律。该研究为寒冷地区水工混凝土结构碳化时变可靠度分析和碳化寿命预测提供参考。
Abstract:
Carbonation is the most common durability deterioration factor for hydraulic concrete structures. In cold regions, concrete freeze-thaw damage has further aggravated the carbonization effect, especially in the alternately wet-dry parts. In view of the carbonation problem of concrete in freeze-thaw environment, time-varying reliability level of carbonation of freeze-thaw damaged concrete during service life was analyzed. Combined with existing concrete carbonation model, concrete freeze-thaw damage model, and freeze-thaw correlation between laboratory and natural environment, a concrete carbonation depth model under freeze-thaw environment was established, and a time-varying reliability analysis method for carbonation was established by combining statistical model and numerical characteristics of related variables. Then, through parameter analysis, effects of freeze-thaw, carbonation residue, environmental influence coefficient and concrete position on time-varying reliability of carbonation were studied, which could provide a reference for time-varying reliability analysis and carbonation life prediction of hydraulic concrete structures in cold regions.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2020-11-26
基金项目:江苏省水利科技项目(2017025、2020016),水利部公益性行业科研专项(201501036)
作者简介:刘兆正(1962—),男,高级工程师,研究方向为水利工程管理。
更新日期/Last Update: 2021-06-23