基于DIC技术的大粒径水工沥青混凝土断裂性能研究  

Research on Fracture Performance of Large-Diameter Hydraulic Asphalt Concrete Based on DIC Technology

作　　者：卢建南 LU Jiannan(Xinjiang Survey and Design Institute for Water Resources and Hydropower Limited Liability Company,Urumqi 830000,China)

机构地区：[1]新疆水利水电勘测设计研究院有限责任公司,新疆乌鲁木齐830000

出　　处：《云南水力发电》2024年第4期68-72,共5页Yunnan Water Power

基　　金：新疆维吾尔自治区自然科学基金项目(2021D01A100)。

摘　　要：在水工沥青混凝土中断裂主要以张开型(I型)为主,为研究不同油石比下大粒径水工沥青混凝土的断裂性能,通过预裂缝小梁弯曲试验,并基于数字图像相关(DIC)技术对试件从加载到破坏过程中的水平应变进行分析。结果表明:在试验范围内不同油石比对大粒径水工沥青混凝土的断裂性能影响并不显著。不同油石比下沥青混凝土的临界应力强度因子和J积分断裂韧度变化均不明显,利用DIC技术可以较好地反映出试件在断裂过程中的应变情况,为沥青混凝土的断裂性能提供量化依据。The fracture of hydraulic asphalt concrete is mainly characterized by open type(Type I).To study the fracture performance of large-diameter hydraulic asphalt concrete under different oil stone ratios,this paper conducts pre-crack small beam bending tests and analyzes the horizontal strain of the specimens from loading to failure based on digital image correlation(DIC)technology.The results indicate that different oil stone ratios have no significant impact on the fracture performance of large-diameter hydraulic asphalt concrete within the experimental range.The changes in critical stress intensity factor and J-integral fracture toughness of asphalt concrete under different oil stone ratios are not significant.The use of DIC technology can better reflect the strain situation of the specimen during the fracture process,providing a quantitative basis for the fracture performance of asphalt concrete.

关 键 词：水工沥青混凝土 大粒径骨料 油石比 DIC技术 J积分断裂韧度 

分 类 号：TV431.5[水利工程—水工结构工程]