PVA纤维混凝土冻融循环损伤规律及模型研究  

Study on Freeze-thaw Cycle Damage Law and Model of PVA Fiber Reinforced Concrete

作　　者：赵小明 王新科 乔宏霞[2] 黄瑞 ZHAO Xiao-ming;WANG Xin-ke;QIAO Hong-xia;HUANG Rui(Gansu Sixth Construction Group Co.,Ltd.,Lanzhou 730046,China;West China Civil Engineering Disaster Prevention and Mitigation Engineering Research Center,Ministry of Education,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]甘肃第六建设集团股份有限公司,甘肃兰州730046 [2]兰州理工大学西部土木工程防灾减灾教育部工程研究中心,甘肃兰州730050

出　　处：《混凝土与水泥制品》2022年第1期53-57,共5页China Concrete and Cement Products

基　　金：兰州市科学技术局科技计划项目(2019-1-44)。

摘　　要：研究了PVA纤维的体积掺量(0.05%、0.10%、0.15%)和长度(8 mm、12 mm)对混凝土相对动弹性模量、质量损失率和力学性能的影响,分析了PVA纤维混凝土的冻融损伤规律,建立了以相对动弹性模量为对象的Weibull概率分布损伤模型。结果表明:随着冻融循环次数的增加,体积掺量为0.10%、长度为8 mm的PVA纤维对混凝土抗冻性能的提升效果最好;建立的Weibull概率分布损伤模型可以有效反映PVA纤维混凝土的冻融损伤劣化规律,可为实际工程应用提供参考。The effects of PVA fiber volume content(0.05%,0.10%,0.15%)and length(8 mm,12 mm)on the relative dynamic elastic modulus,mass loss rate and mechanical properties of concrete were studied,and the freeze-thaw damage law of PVA fiber reinforced concrete was analyzed,and the Weibull probability distribution damage model based on the relative dynamic elastic modulus was established.The results show that with the increase of freeze-thaw cycles,PVA fiber with volume content of 0.10%and length of 8 mm has the best effect on improving the frost resistance of concrete.The established Weibull probability distribution damage model can effectively reflect the freeze-thaw damage and deterioration law of PVA fiber reinforced concrete,and can provide a reference for practical engineering applications.

关 键 词：PVA纤维 混凝土 力学性能 冻融损伤 Weibull概率分布 

分 类 号：TU528[建筑科学—建筑技术科学]