The Experts below are selected from a list of 2943 Experts worldwide ranked by ideXlab platform

M H Baluch - One of the best experts on this subject based on the ideXlab platform.

  • use of cfrp to maintain Composite action for continuous steel concrete Composite Girders
    Journal of Composites for Construction, 2016
    Co-Authors: Alfarabi Sharif, Mohammad A Samaaneh, A K Azad, M H Baluch
    Abstract:

    AbstractThe loss of Composite action at the negative moment region for a continuous Composite Girder reduces the Girder’s strength and stiffness. This paper presents an experimental investigation into the use of carbon fiber–reinforced polymer (CFRP) to maintain the Composite action at the negative moment region of continuous Composite Girders. This is achieved by bonding CFRP sheets to the top of a concrete slab at the negative moment region. Six two-span continuous Composite Girders were tested. CFRP sheet thickness was varied to assess its effect on Girder behavior. The Girders were designed to have full Composite action between the concrete slab and the steel Girder. Moment capacity at the positive and negative moment regions was evaluated experimentally and theoretically. A plastic analysis was conducted to evaluate the ultimate capacity of the Girders. Finite-element modeling evaluated Girder performance numerically. The experimental results confirmed the effectiveness of CFRP sheets in maintaining ...

Hamid Saadatmanesh - One of the best experts on this subject based on the ideXlab platform.

  • strengthening of steel concrete Composite Girders using carbon fiber reinforced polymers sheets
    Journal of Structural Engineering-asce, 2003
    Co-Authors: Mohammadreza Tavakkolizadeh, Hamid Saadatmanesh
    Abstract:

    The use of advanced Composite materials for rehabilitation of deteriorating infrastructure has been embraced worldwide. The conventional techniques for strengthening of substandard bridges are costly, time consuming, and labor intensive. Many new techniques have used the lightweight, high strength, and the corrosion resistance of fiber reinforced polymers ~FRP! laminates for repair and retrofit applications. The load-carrying capacity of a steel-concrete Composite Girder can be improved significantly by epoxy bonding carbon fiber reinforced polymers ~CFRP! laminates to its tension flange. This paper presents the results of a study on the behavior of steel-concrete Composite Girders strengthened with CFRP sheets under static loading. A total of three large-scale Composite Girders made of W355313.6 A36 steel beam and 75-mm thick by 910-mm wide concrete slab were prepared and tested. The thickness of the CFRP sheet was constant and a different number of layers of 1, 3, and 5 were used in the specimens. The test results showed that epoxy-bonded CFRP sheet increased the ultimate load-carrying capacity of steel-concrete Composite Girders and the behavior can be conservatively predicted by traditional methods.

Alfarabi Sharif - One of the best experts on this subject based on the ideXlab platform.

  • use of cfrp to maintain Composite action for continuous steel concrete Composite Girders
    Journal of Composites for Construction, 2016
    Co-Authors: Alfarabi Sharif, Mohammad A Samaaneh, A K Azad, M H Baluch
    Abstract:

    AbstractThe loss of Composite action at the negative moment region for a continuous Composite Girder reduces the Girder’s strength and stiffness. This paper presents an experimental investigation into the use of carbon fiber–reinforced polymer (CFRP) to maintain the Composite action at the negative moment region of continuous Composite Girders. This is achieved by bonding CFRP sheets to the top of a concrete slab at the negative moment region. Six two-span continuous Composite Girders were tested. CFRP sheet thickness was varied to assess its effect on Girder behavior. The Girders were designed to have full Composite action between the concrete slab and the steel Girder. Moment capacity at the positive and negative moment regions was evaluated experimentally and theoretically. A plastic analysis was conducted to evaluate the ultimate capacity of the Girders. Finite-element modeling evaluated Girder performance numerically. The experimental results confirmed the effectiveness of CFRP sheets in maintaining ...

Teruhiko Yoda - One of the best experts on this subject based on the ideXlab platform.

  • a comparative study between studs and pbls on mechanical behavior of Composite Girders subjected to hogging moment
    Australasian Structural Engineering Conference 2012: The past present and future of Structural Engineering, 2012
    Co-Authors: Weiwei Lin, Teruhiko Yoda
    Abstract:

    The purpose of the present study is to investigate an influence of different types of shear connectors on mechanical behaviour of Composite steel and concrete Girders under negative bending moment. Two overturned simply supported steel-concrete Composite Girders with different shear connectors including Studs and Perfo-Bond Strips (PBLs) were tested under point load in the mid-span. Based on the experimental observations, a three-dimensional FE model capable of analyzing the Composite Girders subjected to negative bending moment was built. Load and deformation response, concrete initial cracking and Composite Girder ultimate load bearing capacity, strain development process of reinforcing bars before and after concrete cracking were observed in the test and compared with the numerical values. Results predicted by this modelling method are in good agreement with those obtained from the tests. Furthermore, the “crack closure” or “through crack” load were recorded by π-gauges in the tests and compared with the code-specified ultimate load.

  • mechanical behavior of Composite Girder with perfobond shear connector under hogging moment
    Advanced Materials Research, 2012
    Co-Authors: Yuqing Liu, Airong Chen, Chen Zhao, Teruhiko Yoda
    Abstract:

    The mechanical behavior of the support regions for continuous Composite Girders with tensile stresses in the concrete slab and compressive stresses in the lower steel profile becomes strongly nonlinear under negative bending moments. A static test on four half-scale model of a steel and concrete Composite Girders with different shear connectors including studs and PBL under hogging moments was conducted and observed to evaluate the influence of shear connector on inelastic behavior such as flexural stiffness reduction, crack initiation and development in concrete slab. From the test results, the flexural stiffness and loading capacity of the Composite Girders were improved by PBL shear connector. Higher initial cracking load and crack resistance stiffness of Composite Girders with PBL shear connector under serviceability limit state was obtained during crack development process. The test specimen could be assumed as full Composite section until the ultimate state from load-slip relationship of shear connector. Analytical and experimental studies can serve as a basis for continuous Composite bridges design.

  • mechanical behaviour of Composite Girders subjected to hogging moment experimental study
    Journal of Japan Society of Civil Engineers Ser. A1 (Structural Engineering & Earthquake Engineering (SE EE)), 2011
    Co-Authors: Weiwei Lin, Teruhiko Yoda
    Abstract:

    In continuous Composite steel-concrete structures, cracking of the concrete slab in the hogging moment region decreases the global stiffness of Composite steel-concrete structures and reduces the effect of continuity, thus making the structural behaviour highly nonlinear even for low stress levels, so special consideration is necessary. An experimental investigation on the behaviour of steel-concrete Composite beams in hogging moment region is presented in this paper. A total of four specimens were tested under point load in the mid-span. Two of the Composite beams with headed studs as the shear connectors, while the other two specimens are using Perfo-Bond Strips (PBLs) as the connection devices between the steel Girder and the concrete slab. Ultimate load bearing capacity of Composite sections in negative moment region was calculated and compared with experimental values. Crack formation, crack widths development process and strain distribution of the Composite section before and after cracking were observed and presented in this study. Interface slip distribution was also given. Research results indicate that the current specifications such as AASHTO, JSCE, and EUROCODE-4 can provide appropriate values for ultimate strength of a Composite Girder under negative bending moment.

  • Analysis, design and construction of curved Composite Girder bridges: State-of-the-art
    International Journal of Steel Structures, 2010
    Co-Authors: Weiwei Lin, Teruhiko Yoda
    Abstract:

    The horizontally curved Composite Girder bridges have excellent properties, such as quick construction, good seismic performance, saving construction formwork and convenience in spatial arrangement.etc, which have greatly promoted the application of such bridges. The objective of this paper is to provide and summarize important references related to the analysis, design and construction of curved Composite Girder bridges. Subjects discussed in this review include (1) different curved Girder bridge configurations and their applied range; (2) current specifications; (3) construction issues; (4) design methods; (5) analytical methods; (6) load distribution; (7) torsional behavior; (8) warping stresses; (9) stability; (10) ultimate load-carrying capacity; (11) dynamic and seismic response; (12) loading test; (13) long-term behavior; and (14) design details. The literature survey presented herein mainly focuses on papers written in English, Japanese and Chinese in relation to curved Composite Girders.

Mohammadreza Tavakkolizadeh - One of the best experts on this subject based on the ideXlab platform.

  • strengthening of steel concrete Composite Girders using carbon fiber reinforced polymers sheets
    Journal of Structural Engineering-asce, 2003
    Co-Authors: Mohammadreza Tavakkolizadeh, Hamid Saadatmanesh
    Abstract:

    The use of advanced Composite materials for rehabilitation of deteriorating infrastructure has been embraced worldwide. The conventional techniques for strengthening of substandard bridges are costly, time consuming, and labor intensive. Many new techniques have used the lightweight, high strength, and the corrosion resistance of fiber reinforced polymers ~FRP! laminates for repair and retrofit applications. The load-carrying capacity of a steel-concrete Composite Girder can be improved significantly by epoxy bonding carbon fiber reinforced polymers ~CFRP! laminates to its tension flange. This paper presents the results of a study on the behavior of steel-concrete Composite Girders strengthened with CFRP sheets under static loading. A total of three large-scale Composite Girders made of W355313.6 A36 steel beam and 75-mm thick by 910-mm wide concrete slab were prepared and tested. The thickness of the CFRP sheet was constant and a different number of layers of 1, 3, and 5 were used in the specimens. The test results showed that epoxy-bonded CFRP sheet increased the ultimate load-carrying capacity of steel-concrete Composite Girders and the behavior can be conservatively predicted by traditional methods.