The Experts below are selected from a list of 18 Experts worldwide ranked by ideXlab platform

Chul-min Cho - One of the best experts on this subject based on the ideXlab platform.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

Young-jun You - One of the best experts on this subject based on the ideXlab platform.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

Jang-ho Jay Kim - One of the best experts on this subject based on the ideXlab platform.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

Young-hwan Park - One of the best experts on this subject based on the ideXlab platform.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

  • Consideration of Creep coefficient of RC beam reinforced by GFRP rebar with minimum 900 MPa guaranteed tensile strength
    Materials and Structures, 2016
    Co-Authors: Young-jun You, Jang-ho Jay Kim, Young-hwan Park, Chul-min Cho
    Abstract:

    Since FRP rebars developed up to present are produced without specific guidelines on their content ratio, fiber type, and surface shape, the performance capacity of FRP reinforced concrete (RC) members cannot be fully guaranteed even though the concrete members were designed according to the existing design guidelines. Moreover, since investigations of FRP RC members have focused mainly on their short-term behavior, knowledge of their long-term behavior (i.e., Creep and shrinkage effects) of FRP RC members is greatly needed for a proper design of the members. In order to verify material and structural Creep behavior of a deformed glass FRP (GFRP) rebar with a guaranteed tensile strength of minimum 900 MPa manufactured from modified braidtrusion process, long-term material and structural Creep Tests of the GFRP rebar and GFRP RC beam, respectively, were conducted. The material Creep Test Result showed that a service life of 100 years can be guaranteed when the sustained load magnitude is less than 50 % of the maximum tensile load capacity of the rebar. The structural Creep Test Results showed that current design guidelines either overestimate or underestimate the long-term deflection of GFRP RC members. Therefore, a coefficient accounting for the time-dependent characteristics must be properly selected.

Zhang Qingjie - One of the best experts on this subject based on the ideXlab platform.

  • Theory and Experiment Research on MSP Evaluation Method for Si 3 N 4 Ceramic Creep Properties: Theory and Experiment Research on MSP Evaluation Method for Si 3 N 4 Ceramic Creep Properties
    Journal of Inorganic Materials, 2009
    Co-Authors: Chen Gang, Zhai Pengcheng, Zhang Qingjie
    Abstract:

    Theory research of MSP£¨Modified Small Punch£©Creep Test was performed based on the thin plate bending Creep model and the theory formula of Creep stress exponent was established. A numerical study was carried out to simulate MSP Creep Tests by using the finite element software MARC. The Creep stress exponent adopted in the numerical simulation was compared with the evaluation Result. It is found that differences are 1.6% and 2.7% for 12Cr1MoV steel and tungsten-alloyed 9% Cr steel, respectively. The difference between the MSP Creep Test Result of SUS304 stainless steel and the traditionally uniaxial Creep Test Result is only 2.9%. The validity of the theory formula is verified by the consistency of numerical simulation Results and by the excellent agreement with the experimental Results. Based on the research of the Creep properties of Si3N4 ceramic, it is found that there are both preferable ductibility and obvious Creep deformation at 1000¡䬠The Creep stress exponent of Si3N4 ceramic is obtained by using the theory formula. The Results indicate that the MSP Creep Test method has wide application for the evaluation of high temperature Creep properties of nonmetal materials.