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Influence of interface thickness on twin fiber pull-out test of concrete(PDF)


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Influence of interface thickness on twin fiber pull-out test of concrete
Zhang Yafang Gao Zhao Liu Hao and He Juan
Faculty of Civil Engineering, Guangzhou University, Guangzhou 510006, Guangdong Province, P.R.China
concrete meso-mechanical double fiber pull-out test interface strength acoustic emission peak load toughness
TB 333
Meso-level heterogeneous distribution of interface mechanical parameters is investigated. Numerical models for twin fibers pull-out test are created by using 3D finite element method. Influence of interface thickness on damage pattern and mechanical properties is studied on twin fibers pull-out test specimens. By applying load with displacement control, load-displacement curves, acoustic emission (AE) accumulative curves and interface shear stress distribution curves of twin fibers and concrete matrix specimen are plotted. The damage pattern and AE pattern of pull-out test specimen vary along with the interface strength. The thicker the interface is, the higher the interface capacity for transferring stress and high shear strength. The splitting of fibers could happen later than the specimen with thin interface. In addition, appropriate thick interface benefits the improved peak load and toughness.


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Last Update: 2017-09-11