Experimental Research and Numerical Investigation of High-Strength Concrete Structure Strengthened with CFRP

The shear resistance at the interface between FRP sheet and concrete is a key problem for the application of fiber-reinforced plastic (FRP) plates, which has emerged as a popular method for the strengthening of reinforced concrete structures. The objective of this study is to discuss the interfacial shear ultimate bearing capacity of a high-strength concrete structure strengthened by carbon fiber-reinforced polymer composites under static loads. Considering the different strength of concretes, double-shear tests were conducted. Based on the test results, considering of the adhesive layer, explicit finite element is used for simulating the shear failure of CFRP-strengthened concrete, obtain the whole process of structure deformation development, describe the conformation and development of crack and the failure mode. The FE result coincides with the experimental result.

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High-Strength Concrete Structure Strengthened with CFRP: Experimental Study and Nonlinear FE Analysis

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.255-260.3087 ◽

2011 ◽

Vol 255-260 ◽

pp. 3087-3090

Author(s):

Hong Hai ◽

Ying Hua Zhao ◽

Li Ye Sun

Keyword(s):

Experimental Study ◽

Failure Mode ◽

Concrete Structure ◽

High Strength Concrete ◽

High Strength ◽

Fe Analysis ◽

Fiber Reinforced ◽

Concrete Member ◽

Strength Concrete ◽

Nonlinear Fe Analysis

This paper deals with high-strength concrete structure with carbon fiber reinforced plastic (CFRP) strips bonded to the shear face. The first part deals with an experimental study. The fiber reinforced plastics strengthened concrete member test presents a failure mode with debonding of the external CFRP strips from the concrete member. The second part deals with a nonlinear FE analysis with LS-DYNA . Considering of the adhesive layer, explicit finite element is used for simulating the shear failure of CFRP-strengthened concrete, obtain the whole process of structure deformation development and describe the conformation and development of crack and the failure mode. The FE results are compared with the experimental results.

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Experimental Research and Nonlinear Finite Element Analysis of CFRP-Strengthened High-Strength Concrete Structure

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.250-253.2234 ◽

2011 ◽

Vol 250-253 ◽

pp. 2234-2237

Author(s):

Hong Hai ◽

Ying Hua Zhao

Keyword(s):

Finite Element Analysis ◽

Finite Element ◽

High Strength Concrete ◽

Shear Failure ◽

High Strength ◽

Nonlinear Finite Element Analysis ◽

Nonlinear Finite Element ◽

Experimental Result ◽

Element Analysis ◽

Strength Concrete

The debonding behavior at the interface between fiber-reinforced plastic (FRP) sheet and concrete is a key problem for the application of FRP plate, which has been widely applied in the civil engineering for rehabilitation and retrofitting of conventional structures. This paper presents the experimental and nonlinear finite element analysis results of the CFRP-strengthened high-strength concrete member. On the basis of the test, considering of the adhesive layer, explicit finite element is used for simulating the shear failure of CFRP-strengthened concrete, obtain the whole process of structure deformation development, describe the conformation and development of crack and the failure mode. The FE result coincides with the experimental result.

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Transfer Mechanism of Steel Fiber Reinforced High Strength Concrete Three-Pile Caps

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.71-78.981 ◽

2011 ◽

Vol 71-78 ◽

pp. 981-987

Author(s):

Dan Ying Gao ◽

Hui Hai ◽

Jie Lei

Keyword(s):

High Strength Concrete ◽

Shear Failure ◽

Steel Fiber ◽

High Strength ◽

Transfer Mechanism ◽

Fiber Reinforced ◽

Strength Concrete ◽

Space Truss ◽

Pile Cap ◽

Pile Caps

Based on the experiments on 10 specimens of steel fiber reinforced high strength concrete three-pile caps with the ratio of the model to the real of 1:5, the developing of cracks and failure of caps were described, the transfer mechanism of pile caps was analyzed in detail and the principle of space truss model of the thick three-pile cap was proposed. The test results suggested that the destruction of thick pile cap belongs to punching or shear failure, which is different from that of the general bending member.

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