环境和疲劳荷载作用下开裂混凝土寿命预测研究进展  

Research Progress on Life Prediction of Cracked Concrete under Environment and Fatigue Load

作　　者：司秀勇 高青宇 潘慧敏[2] 赵庆新[2] SI Xiuyong;GAO Qingyu;PAN Huimin;ZHAO Qingxin(School of Road and Bridge Engineering,Tianjin Transportation Technical College,Tianjin 300380,China;Hebei Province Engineering Research Center for Harmless Synergistic Treatment and Recycling of Municipal Solid Waste,Yanshan University,Qinhuangdao 066004,China)

机构地区：[1]天津交通职业学院路桥工程学院,天津300380 [2]燕山大学城市固废无害化协同处置及利用河北省工程研究中心,秦皇岛066004

出　　处：《硅酸盐通报》2024年第1期1-15,共15页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(51608469,52078450)。

摘　　要：混凝土是一种准脆性材料,大量混凝土结构在设计使用寿命期间会不可避免地出现裂缝并带着裂缝工作。裂缝的存在会直接影响到混凝土结构使用寿命,特别是在侵蚀性环境因素或疲劳荷载作用下。本文对钢筋混凝土裂缝扩展过程进行了分析,对不同侵蚀环境作用下开裂混凝土结构劣化机制、寿命预测研究方法及预测模型等进行了系统的梳理和对比。阐述了疲劳裂纹扩展理论在开裂混凝土结构疲劳寿命预测中的应用现状与优势,并归纳了基于该理论的部分寿命预测方法及预测模型。此外,还对侵蚀环境与疲劳荷载耦合作用下开裂混凝土结构寿命预测方法进行了总结与讨论,指出了现有开裂混凝土结构寿命预测研究尚存在的问题,并对今后的研究方向提出了建议。Concrete is a quasi brittle material,and a large number of concrete structures inevitably experience cracks and work with them during their designed service life.The existence of cracks directly affects the service life of concrete structures,especially under erosion environmental factors or fatigue loads.The crack propagation process of reinforced concrete is analyzed.The deterioration mechanism,life prediction methods and prediction models of cracked concrete structures under different erosion environments are systematically reviewed and compared.The application status and advantages of fatigue crack propagation theory in fatigue life prediction of cracked concrete structures are described,and some life prediction methods and prediction models based on this theory are summarized.In addition,the life prediction methods of cracked concrete structures under the coupling action of erosion environment and fatigue load are summarized and discussed.In the end,the existing problems in the field of life prediction of cracked concrete structures are pointed out and some suggestions for future research are put forward.

关 键 词：开裂混凝土 裂缝 侵蚀性环境 疲劳荷载 寿命预测 

分 类 号：TU528.01[建筑科学—建筑技术科学]