Local Crack Identification Technology of Concrete in Marine Environment Service
About the author:
1. CCCC Third Harbor Engineering Bureau Co., Ltd., Shanghai 200032,China;2. Ningbo Branch of CCCC Third Harbor Engineering Bureau Co., Ltd.,Ningbo, Zhejiang 315299,China
Abstract:
Aiming at the problem of quantitative monitoring of crack generation and propagation duringlong-term service of concrete structures in marine environment, the crack identification method isstudied. Based on the digital image correlation technology and the principle of local crack kinematics, atest technology that can obtain the full-field deformation information of concrete specimens andautomatically identify local cracks is proposed. The crack initiation and propagation process of hydraulicconcrete with different pebble content were measured by this technology, and the compressive strengthwas quantitatively evaluated. The results show that this method can accurately capture local cracks andjudge the expansion trend in time through crack parameters. With the increase of marine content, thecompressive strength of concrete decreases, but the crack morphology gradually changes from the throughtype to the dispersed type. The above method can provide effective technical support for the quantitativeevaluation and durability life prediction of concrete cracks in the marine environment.
