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  • Trans Tech Publications, Ltd.  (28)
  • Huang, Pei Yan  (28)
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  • Trans Tech Publications, Ltd.  (28)
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  • 1
    Online Resource
    Online Resource
    Experimental Study on Fatigue Life of Steel Beams Strengthened with a CFRP Plate
    Trans Tech Publications, Ltd. ; 2008
    In:  Advanced Materials Research Vol. 33-37 ( 2008-3), p. 163-168
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 33-37 ( 2008-3), p. 163-168
    Abstract: The adhesive bonding between the steel beam and carbon fibre reinforced polymer (CFRP) plate is the weakest link and fatigue performance is a major consideration. This paper gives details of a fatigue test programme of a series of small-scale steel beams bonded with a CFRP plate. Two phases of the fatigue life, including crack initiation life and crack propagation life, are considered. Backface-strain technique was applied to monitor crack initiation. An S-N curve was developed from the test results. The curve correlates the maximum principal interfacial stress at the plate end to the crack initiation life. The fatigue limit of the S-N curve was found to be about 30% of the ultimate static failure stress. In accordance with Paris Law, moreover, an equation was developed to predict the number of cycles during the crack propagation. The empirical coefficients of the equation were obtained from the fatigue test results. This equation can correctly predict the crack propagation life. The fatigue load range affects the fatigue life, but its significance is much less than the magnitude of the maximum load in the load range.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.33-37
    DOI: 10.4028/www.scientific.net/AMR.33-37.163
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2008
    detail.hit.zdb_id: 2265002-7
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Experimental Study on the Fatigue Properties of RC Beam Strengthened by Prestressed CFL
    Trans Tech Publications, Ltd. ; 2008
    In:  Advanced Materials Research Vol. 33-37 ( 2008-3), p. 169-173
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 33-37 ( 2008-3), p. 169-173
    Abstract: Bonding prestressed CFL to strengthen reinforced RC structures can improve the bending capability of structures and the working efficient of CFL. Base on the fatigue experiments of 4 RC beams strengthened by prestressed CFL, the present paper analyzes the fatigue properties of prestressed CFL reinforced RC beams. Comparing with the experimental results of strengthened RC beams without prestress, it can be concluded that the prestressed technology can improve the reinforcing effect and fatigue lives.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.33-37
    DOI: 10.4028/www.scientific.net/AMR.33-37.169
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2008
    detail.hit.zdb_id: 2265002-7
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  • 3
    Online Resource
    Online Resource
    Numerical Analysis of KI of Semi-Elliptical Surface Crack in Steel Structure Strengthened with FRP under Tensile Load
    Trans Tech Publications, Ltd. ; 2011
    In:  Applied Mechanics and Materials Vol. 137 ( 2011-10), p. 42-49
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 137 ( 2011-10), p. 42-49
    Abstract: Defects like surface crack often appear in steel structures. To ensure the structural integrity and security, the new material such as fiber reinforced polymer (FRP) was adopted for strengthening and repairing. In this paper, three dimensional semi-elliptic surface crack in steel tension specimen strengthened with carbon fiber laminate (CFL) was studied, and numerical analysis was undertaken by Abaqus finite element software to study the stress intensity factor (SIF, KI) of the surface crack for CFL reinforcement effect. The results showed that, strengthening effect of CFL in front side was better than the back side of the steel plate; Crack shape ratio, a/c, had greater influence on strengthening effect in front side compared with little effect in the back side; The changes of crack relative depth, a/B, affected strengthening effect.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.137
    DOI: 10.4028/www.scientific.net/AMM.137.42
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2011
    detail.hit.zdb_id: 2251882-4
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  • 4
    Online Resource
    Online Resource
    Prediction of Bond Strength of FRP-Concrete Based on Multiple Linear Regression Method
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 163-167 ( 2010-12), p. 3623-3628
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 163-167 ( 2010-12), p. 3623-3628
    Abstract: External bonding of fiber reinforced polymer (FRP) plates or sheets composites has become a popular technique for strengthening concrete structures all over the world. The bond strength between FRP and concrete is a key factor controlling debonding failure of various forms in FRP-strengthened concrete structures. Based on the test data, the bond strength model of FRP-concrete was proposed using multiple linear regression and dimensional analysis, in which the effect of multiple factors on dependent was considered. Finally, the proposed model was verified through the test data, and then compared with 12 bond strength models have been found in the existing literature. The result shows that the proposed model has a better accuracy. It can be used to predict the bond strength of FRP-concrete.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.163-167
    DOI: 10.4028/www.scientific.net/AMR.163-167.3623
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2010
    detail.hit.zdb_id: 2265002-7
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  • 5
    Online Resource
    Online Resource
    Debonding Prediction of RC Beam Flexurally Strengthened with Prestressed FPR
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 163-167 ( 2010-12), p. 3766-3771
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 163-167 ( 2010-12), p. 3766-3771
    Abstract: Intermediate crack debonding is a common failure mode of reinforced concrete (RC) beam flexurally strengthened with externally bonded prestressed fiber reinforced polymer (FRP). This study analyzes the effects of flexural cracks and interface softening behavior on the interface shear stress of RC beam strengthened with prestressed FRP under three-point bending loads, and presents an analytical solution for the FRP axial force at the flexural crack section of the strengthened beam. By regarding the interface fracture energy as the debonding criterion, a new theoretical model to predict the debonding load-carrying capacity of RC beam strengthened with prestressed FRP is proposed.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.163-167
    DOI: 10.4028/www.scientific.net/AMR.163-167.3766
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2010
    detail.hit.zdb_id: 2265002-7
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  • 6
    Online Resource
    Online Resource
    Thermal Fatigue Performance of Steel Fiber Reinforced Polymer High Strength Concrete
    Trans Tech Publications, Ltd. ; 2012
    In:  Applied Mechanics and Materials Vol. 174-177 ( 2012-5), p. 1060-1066
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 174-177 ( 2012-5), p. 1060-1066
    Abstract: To discover the fatigue behavior and durability of the new type fiber concrete named “steel fiber reinforced polymer high strength concrete (SFPHC)”, considering climatic conditions in Guangdong Province, using research method of theoretical analysis combined with experimental study, thermal fatigue behavior of SFPHC used in bridge superstructure in three different temperatures (20°C，50°C，80°C) is discussed and compared with concrete C60 which has similar static mechanical properties at room temperature. The results show that the thermal fatigue performance of SFPHC can be described effectively with the proposed computing formula, and the fatigue performance has been greatly enhanced compared with the C60 concrete.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.174-177
    DOI: 10.4028/www.scientific.net/AMM.174-177.1060
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2012
    detail.hit.zdb_id: 2251882-4
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  • 7
    Online Resource
    Online Resource
    Analysis of Mesoscopic Interfacial Mechanics of RC Beams Strengthened with FRP
    Trans Tech Publications, Ltd. ; 2010
    In:  Advanced Materials Research Vol. 97-101 ( 2010-3), p. 1713-1717
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 97-101 ( 2010-3), p. 1713-1717
    Abstract: Concrete is assumed as a three-phase composite material composed by aggregate, mortar matrix and the bond layer between them in mesoscopic. The damage constitutive relationships of the composed materials are determined. A local meso-model of reinforced concrete (RC) beams strengthened with hybrid FRP was established to investigate the crack propagation and failure modes. The results show that the deformation, damage and failure of the concrete occurred near the ends of the interface.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.97-101
    DOI: 10.4028/www.scientific.net/AMR.97-101.1713
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2010
    detail.hit.zdb_id: 2265002-7
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  • 8
    Online Resource
    Online Resource
    Study on Interfacial Shear Stress in RC Beams Strengthened with Prestressed FRP Laminates
    Trans Tech Publications, Ltd. ; 2008
    In:  Advanced Materials Research Vol. 33-37 ( 2008-3), p. 507-514
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 33-37 ( 2008-3), p. 507-514
    Abstract: Reinforced concrete (RC) beams strengthened with prestressed fiber-reinforced polymer (FRP) laminates has been proved to be a rather effective strengthening technique in the field of bridge engineering. However, debonding failure usually occurs at the end of FRP in the strengthened beams on releasing the prestress due to the high interfacial shear stress. Analytical method to calculate the interfacial stress is developed in this paper. Through the establishment of mathematical model for the interfacial shear stress, the distribution of the interfacial shear stress and the longitudinal stress of FRP are presented explicitly in an analytical way. Moreover, the maximum prestress level is estimated to prevent debonding failure on releasing the prestress. Finally, experimental results of eight strengthened beams validate the analytical solution for the FRP longitudinal stress.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.33-37
    DOI: 10.4028/www.scientific.net/AMR.33-37.507
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2008
    detail.hit.zdb_id: 2265002-7
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  • 9
    Online Resource
    Online Resource
    Experimental Study on Fatigue Stiffness of RC Beams Strengthened with CFL under Variable Amplitude Overloading
    Trans Tech Publications, Ltd. ; 2014
    In:  Applied Mechanics and Materials Vol. 578-579 ( 2014-7), p. 1317-1322
    Details
    In: Applied Mechanics and Materials, Trans Tech Publications, Ltd., Vol. 578-579 ( 2014-7), p. 1317-1322
    Abstract: This paper study the effects of stress amplitude on the fatigue performance of reinforced concrete (RC) beams strengthened with carbon fibre laminate (CFL). A total of 15 spcimens were tested under three point bending. Three load levels over 60% bending capacity of the strengthened beams with a stress ratio of 0.1 were applied to three groups of five specimens, respectively. The stress amplitudes of groups 2 and 3 are 10% and 15% larger than group 1, respectively. The loads and deflections during the tests were recorded. The fatigue stiffness of the strengthened RC beams with variable stress amplitude was discussed. The experimental results show that the rates of the bending stiffness deterioration of the retrofitted beams, which increase with the load level, under constant fatigue loading are smaller than those under variable fatigue loading.
    Type of Medium: Online Resource
    ISSN: 1662-7482
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMM.578-579
    DOI: 10.4028/www.scientific.net/AMM.578-579.1317
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2014
    detail.hit.zdb_id: 2251882-4
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  • 10
    Online Resource
    Online Resource
    Analysis of Interfacial Debonding of RC Beams Strengthened with CFL
    Trans Tech Publications, Ltd. ; 2008
    In:  Advanced Materials Research Vol. 33-37 ( 2008-3), p. 47-54
    Details
    In: Advanced Materials Research, Trans Tech Publications, Ltd., Vol. 33-37 ( 2008-3), p. 47-54
    Abstract: The interfacial bonding property between carbon fiber laminate (CFL) and concrete is a key issue in the application of RC beams strengthened with CFL. In this paper, fracture mechanics method is used to develop a calculation formula of stress intensity factor for the CFL-concrete interfacial crack. In combination with a series of tests, the interfacial fracture toughness is discussed, and the influencing factors and process of the intermediate crack-induced debonding (IC debonding) are also analyzed. The tests results show that IC debonding is generally induced by the flexural or flexural-shear cracks in the bottom of RC beams around the mid-span, and develop along the interface towards the end of the beam. A method to determine IC debonding derived from theoretic analysis and the tests results demonstrates that the interfacial failure can be effectively avoided by limiting CFL strain in the range of the debonding strain.
    Type of Medium: Online Resource
    ISSN: 1662-8985
    URL: Issue
    URL: Article
    DOI: 10.4028/www.scientific.net/AMR.33-37
    DOI: 10.4028/www.scientific.net/AMR.33-37.47
    Language: Unknown
    Publisher: Trans Tech Publications, Ltd.
    Publication Date: 2008
    detail.hit.zdb_id: 2265002-7
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