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- W2351834918 abstract "To study the influence of the crack-depth ratio on reinforced concrete fracture parameters such as the initiation fracture toughness,the unstable fracture toughness and the effect of the reinforcing bar on crack propagation in concrete,four groups three-point bending specimens with initial crack-depth ratios of 0.2,0.3,0.4 and 0.5 were designed and constructed.The fracture behavior of the beams was studied in details.A model for calculating fracture toughness of reinforced concrete was developed by analyzing crack propagation process of the three-point bending beams.Formula for calculating effective crack length of reinforced concrete was given.The research results show that crack propagation process of reinforced concrete can be described by double-K criterion after introducing fracture toughness,which is suitable for reinforced concrete.The values of initiation fracture toughness and unstable fracture toughness of reinforced concrete are independent of crack-depth ratio when crack-depth ratio is equal to or greater than 0.4.Acoustic emission parameters can accurately ascertain the crack initiation load of specimens.Compared with traditional stain gauge method,acoustic emission signal can better reflect the true state of fracture-initiation in the specimens." @default.
- W2351834918 created "2016-06-24" @default.
- W2351834918 creator A5056894183 @default.
- W2351834918 date "2013-01-01" @default.
- W2351834918 modified "2023-09-23" @default.
- W2351834918 title "Experimental study on double-K fracture characteristics of standard reinforced concrete three-point beam" @default.
- W2351834918 hasPublicationYear "2013" @default.
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