The Experts below are selected from a list of 231 Experts worldwide ranked by ideXlab platform

Yukihiro Matsumoto - One of the best experts on this subject based on the ideXlab platform.

  • Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates.
    Materials (Basel Switzerland), 2020
    Co-Authors: Fengky Satria Yoresta, Phan Viet Nhut, Yukihiro Matsumoto
    Abstract:

    This paper presented a non-linear finite element (FE) analysis to investigate the potential of unbonded carbon fiber-reinforced polymers (CFRP) strengthening in improving the axial Compression performance of Steel members. The FE model was firstly developed and validated against experimental works. Four parameters considered in the parametric study were the number of CFRP layers, CFRP length, slenderness ratio, and elastic modulus of CFRP. It was confirmed that the unbonded CFRP strengthening method is effective at enhancing the load-carrying capacity as well as delaying the overall buckling of the axial Steel members. The strength increase is highly affected by the first three parameters. In addition, the method of an equivalent slenderness ratio can be used for strength design.

  • Strengthening of Steel member using unbonded CFRP laminates
    E3S Web of Conferences, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Excellent mechanical and physical properties make carbon fiber reinforced polymer (CFRP) the best options for repair, retrofit, and rehabilitation of civil engineering structures. A great success on application of this material in reinforced concrete (RC) structures has attracted much attention from many researchers to develop it in combination with Steel. The number of studies on the use of CFRP composites for strengthening Steel structures has still been limited and needs to be more explored. To date, the research in this field has mainly focused on CFRP strengthening with adhesively-bonded technique. This paper reports an experimental study to investigate the performance of slender axial Compression Steel members partially strengthened with unbonded CFRP composites. The requirements for stiffener to prevent buckling occurred in stiffening region are derived from structural equilibrium conditions. Vacuum-assisted Resin Transfer Molding (VaRTM) method is adopted to form CFRP laminates in the strengthened specimens. Totally eight small scale specimens are tested, and it is clear from the test that improvement in load-carrying capacity can be achieved by using CFRP.

  • Unbonded CFRP strengthening method for buckling control of Steel members
    Construction and Building Materials, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Abstract This paper proposed a concept of unbonded CFRP strengthening method for buckling control of axial Compression Steel members. Totally eight Steel bar specimens, with slenderness ratio of 70 and 95, were tested for initial investigation purpose. The requirements for CFRP were derived from analytical study. A technique of Vacuum-assisted Resin Transfer Molding (VaRTM) was adopted to mold the CFRP to obtain zero clearance between CFRP and Steel. Experimental results showed that unbonded CFRP strengthening delayed buckling and increased the axial capacity of Steel members. A change in curvature was also confirmed for all strengthened members without any crushing on CFRP.

Fengky Satria Yoresta - One of the best experts on this subject based on the ideXlab platform.

  • Finite Element Analysis of Axial Compression Steel Members Strengthened with Unbonded CFRP Laminates.
    Materials (Basel Switzerland), 2020
    Co-Authors: Fengky Satria Yoresta, Phan Viet Nhut, Yukihiro Matsumoto
    Abstract:

    This paper presented a non-linear finite element (FE) analysis to investigate the potential of unbonded carbon fiber-reinforced polymers (CFRP) strengthening in improving the axial Compression performance of Steel members. The FE model was firstly developed and validated against experimental works. Four parameters considered in the parametric study were the number of CFRP layers, CFRP length, slenderness ratio, and elastic modulus of CFRP. It was confirmed that the unbonded CFRP strengthening method is effective at enhancing the load-carrying capacity as well as delaying the overall buckling of the axial Steel members. The strength increase is highly affected by the first three parameters. In addition, the method of an equivalent slenderness ratio can be used for strength design.

  • Strengthening of Steel member using unbonded CFRP laminates
    E3S Web of Conferences, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Excellent mechanical and physical properties make carbon fiber reinforced polymer (CFRP) the best options for repair, retrofit, and rehabilitation of civil engineering structures. A great success on application of this material in reinforced concrete (RC) structures has attracted much attention from many researchers to develop it in combination with Steel. The number of studies on the use of CFRP composites for strengthening Steel structures has still been limited and needs to be more explored. To date, the research in this field has mainly focused on CFRP strengthening with adhesively-bonded technique. This paper reports an experimental study to investigate the performance of slender axial Compression Steel members partially strengthened with unbonded CFRP composites. The requirements for stiffener to prevent buckling occurred in stiffening region are derived from structural equilibrium conditions. Vacuum-assisted Resin Transfer Molding (VaRTM) method is adopted to form CFRP laminates in the strengthened specimens. Totally eight small scale specimens are tested, and it is clear from the test that improvement in load-carrying capacity can be achieved by using CFRP.

  • Unbonded CFRP strengthening method for buckling control of Steel members
    Construction and Building Materials, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Abstract This paper proposed a concept of unbonded CFRP strengthening method for buckling control of axial Compression Steel members. Totally eight Steel bar specimens, with slenderness ratio of 70 and 95, were tested for initial investigation purpose. The requirements for CFRP were derived from analytical study. A technique of Vacuum-assisted Resin Transfer Molding (VaRTM) was adopted to mold the CFRP to obtain zero clearance between CFRP and Steel. Experimental results showed that unbonded CFRP strengthening delayed buckling and increased the axial capacity of Steel members. A change in curvature was also confirmed for all strengthened members without any crushing on CFRP.

Luciano Feo - One of the best experts on this subject based on the ideXlab platform.

  • An analysis of the stress–strain state of a timber–concrete T cross section
    Composites Part B: Engineering, 2013
    Co-Authors: Darius Zabulionis, Olga Kizinievič, Luciano Feo
    Abstract:

    Abstract The present paper analyzes a stress–strain state of a composite timber–concrete T cross section under a short-term pure bending. The behaviour of a bending moment in respect of a curvature of the cross section was investigated as well. It is assumed that the plane section hypothesis is valid and layers do not slip with respect to each other. The parabolic stress–strain diagram with a descending branch, according to MC90, was applied to the Compression concrete while a linear elastic relationship was applied to the timber. The stress–strain state of the cross section was investigated from the beginning of the loading up to the stage exceeding ultimate limit state. The analysis was conducted by applying control of the curvature of the considered cross section. The influence of the tension fibre-reinforced polymer (FRP) and Compression Steel reinforcements on the stress–strain state of the cross section was also considered. The obtained analytical equations of the layered members were solved numerically. It was found out that the bearing capacity of the cross section is restricted mainly due to low strength of the timber and the tension reinforcement is more effective than the Compression reinforcement.

Genki Mieda - One of the best experts on this subject based on the ideXlab platform.

  • Strengthening of Steel member using unbonded CFRP laminates
    E3S Web of Conferences, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Excellent mechanical and physical properties make carbon fiber reinforced polymer (CFRP) the best options for repair, retrofit, and rehabilitation of civil engineering structures. A great success on application of this material in reinforced concrete (RC) structures has attracted much attention from many researchers to develop it in combination with Steel. The number of studies on the use of CFRP composites for strengthening Steel structures has still been limited and needs to be more explored. To date, the research in this field has mainly focused on CFRP strengthening with adhesively-bonded technique. This paper reports an experimental study to investigate the performance of slender axial Compression Steel members partially strengthened with unbonded CFRP composites. The requirements for stiffener to prevent buckling occurred in stiffening region are derived from structural equilibrium conditions. Vacuum-assisted Resin Transfer Molding (VaRTM) method is adopted to form CFRP laminates in the strengthened specimens. Totally eight small scale specimens are tested, and it is clear from the test that improvement in load-carrying capacity can be achieved by using CFRP.

  • Unbonded CFRP strengthening method for buckling control of Steel members
    Construction and Building Materials, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Abstract This paper proposed a concept of unbonded CFRP strengthening method for buckling control of axial Compression Steel members. Totally eight Steel bar specimens, with slenderness ratio of 70 and 95, were tested for initial investigation purpose. The requirements for CFRP were derived from analytical study. A technique of Vacuum-assisted Resin Transfer Molding (VaRTM) was adopted to mold the CFRP to obtain zero clearance between CFRP and Steel. Experimental results showed that unbonded CFRP strengthening delayed buckling and increased the axial capacity of Steel members. A change in curvature was also confirmed for all strengthened members without any crushing on CFRP.

Ryotaro Maruta - One of the best experts on this subject based on the ideXlab platform.

  • Strengthening of Steel member using unbonded CFRP laminates
    E3S Web of Conferences, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Excellent mechanical and physical properties make carbon fiber reinforced polymer (CFRP) the best options for repair, retrofit, and rehabilitation of civil engineering structures. A great success on application of this material in reinforced concrete (RC) structures has attracted much attention from many researchers to develop it in combination with Steel. The number of studies on the use of CFRP composites for strengthening Steel structures has still been limited and needs to be more explored. To date, the research in this field has mainly focused on CFRP strengthening with adhesively-bonded technique. This paper reports an experimental study to investigate the performance of slender axial Compression Steel members partially strengthened with unbonded CFRP composites. The requirements for stiffener to prevent buckling occurred in stiffening region are derived from structural equilibrium conditions. Vacuum-assisted Resin Transfer Molding (VaRTM) method is adopted to form CFRP laminates in the strengthened specimens. Totally eight small scale specimens are tested, and it is clear from the test that improvement in load-carrying capacity can be achieved by using CFRP.

  • Unbonded CFRP strengthening method for buckling control of Steel members
    Construction and Building Materials, 2020
    Co-Authors: Fengky Satria Yoresta, Ryotaro Maruta, Genki Mieda, Yukihiro Matsumoto
    Abstract:

    Abstract This paper proposed a concept of unbonded CFRP strengthening method for buckling control of axial Compression Steel members. Totally eight Steel bar specimens, with slenderness ratio of 70 and 95, were tested for initial investigation purpose. The requirements for CFRP were derived from analytical study. A technique of Vacuum-assisted Resin Transfer Molding (VaRTM) was adopted to mold the CFRP to obtain zero clearance between CFRP and Steel. Experimental results showed that unbonded CFRP strengthening delayed buckling and increased the axial capacity of Steel members. A change in curvature was also confirmed for all strengthened members without any crushing on CFRP.