基于DIC技术的混凝土全场变形破坏试验研究

Experimental Study of Concrete Deformation and Failure Based on DIC Technology

混凝土凭借其高强度、耐久性好、取材方便等众多优点使得其在工程结构中得到大量的应用与发展,而对混凝土的破坏失效机理的研究,如何更充分有效的利用混凝土是行业一直重点关注的领域。将混凝土看作是由粗骨料和水泥砂浆基质组成的两相复合材料,基于均匀化思想将骨料考虑成圆形,设计出二维平面模型混凝土试件,借助数字图像相关方法观察研究模型混凝土试件在单轴压缩作用下全场变形破坏过程。

Concrete has been widely used and developed in engineering structures by virtue of its high strength,good durability,convenient materials and many other advantages.However,the research on the failure mechanism of concrete and how to make full and effective use of concrete have been the key areas of the industry.The concrete was regarded as a two-phase composite material composed of coarse aggregate and cement mortar matrix.Based on the idea of homogenization,the aggregate was considered as a circle,and a two-dimensional plane model concrete specimen was designed.The full-field deformation and failure process of the model concrete specimen under uniaxial compression was observed by means of digital image correlation method.