The Experts below are selected from a list of 47421 Experts worldwide ranked by ideXlab platform

Ian M. Friedland - One of the best experts on this subject based on the ideXlab platform.

  • Seismic Performance OF TIMBER BRIDGES
    Transportation Research Record, 2000
    Co-Authors: John B. Mander, Dion R. Allicock, Ian M. Friedland
    Abstract:

    Compared with the Seismic Performance of concrete and steel highway bridges, the Seismic Performance of timber bridges is not well understood. This is because, historically, little effort has been spent on documenting the Seismic Performance of timber bridges in past earthquakes or conducting research to develop an improved understanding of the Seismic design or retrofit requirements for timber bridges. Research work sponsored by FHWA and conducted at the University at Buffalo in conjunction with the Multidisciplinary Center for Earthquake Engineering Research to (a) document the Seismic Performance of timber bridges in past earthquakes, (b) experimentally assess the strength and ductility capabilities of timber pile substructures, and (c) conduct a Seismic vulnerability analysis of timber bridges (principally with shaking in the longitudinal direction) to assess the expected modes of failure is presented. Finally, with a particular emphasis on the 1964 Alaska earthquake, conclusions demonstrating why cer...

  • Seismic Performance of Timber Bridges
    Transportation Research Record: Journal of the Transportation Research Board, 2000
    Co-Authors: John B. Mander, Dion R. Allicock, Ian M. Friedland
    Abstract:

    Compared with the Seismic Performance of concrete and steel highway bridges, the Seismic Performance of timber bridges is not well understood. This is because, historically, little effort has been spent on documenting the Seismic Performance of timber bridges in past earthquakes or conducting research to develop an improved understanding of the Seismic design or retrofit requirements for timber bridges. Research work sponsored by FHWA and conducted at the University at Buffalo in conjunction with the Multidisciplinary Center for Earthquake Engineering Research to ( a) document the Seismic Performance of timber bridges in past earthquakes, ( b) experimentally assess the strength and ductility capabilities of timber pile substructures, and ( c) conduct a Seismic vulnerability analysis of timber bridges (principally with shaking in the longitudinal direction) to assess the expected modes of failure is presented. Finally, with a particular emphasis on the 1964 Alaska earthquake, conclusions demonstrating why certain types of behavior lead to failures in timber bridges are drawn.

Jongwha Bai - One of the best experts on this subject based on the ideXlab platform.

  • Seismic retrofit of a reinforced concrete flat slab structure part i Seismic Performance evaluation
    Engineering Structures, 2007
    Co-Authors: Mary Beth D Hueste, Jongwha Bai
    Abstract:

    An evaluation of Seismic Performance was conducted for a reinforced concrete (RC) frame structure representative of 1980s construction in the Central United States. The case study building is a five-story RC flat-slab office building designed for the code requirements used in this region. The structural response was predicted using nonlinear static analysis and nonlinear dynamic analysis with synthetic ground motion records. The FEMA 356 criteria were used to evaluate the Seismic Performance of the case study structure. Because the case study building does not meet the FEMA 356 basic safety objectives for the Memphis motions, three Seismic retrofit techniques were applied to enhance the Seismic Performance including the addition of shear walls, the addition of RC column jackets, and confinement of the column plastic hinge regions using externally bonded steel plates. Finally, the predicted Seismic Performance for the three retrofitted structures was compared to that for the unretrofitted structure. Varying levels of improvement in the Seismic Performance were demonstrated through the use of the selected Seismic retrofits. Based on the Seismic evaluation with the FEMA 356 criteria, the addition of shear walls provided the greatest improvement in the Seismic Performance of the case study building.

  • Seismic retrofit of a reinforced concrete flat-slab structure: Part I — Seismic Performance evaluation
    Engineering Structures, 2007
    Co-Authors: Mary Beth D Hueste, Jongwha Bai
    Abstract:

    An evaluation of Seismic Performance was conducted for a reinforced concrete (RC) frame structure representative of 1980s construction in the Central United States. The case study building is a five-story RC flat-slab office building designed for the code requirements used in this region. The structural response was predicted using nonlinear static analysis and nonlinear dynamic analysis with synthetic ground motion records. The FEMA 356 criteria were used to evaluate the Seismic Performance of the case study structure. Because the case study building does not meet the FEMA 356 basic safety objectives for the Memphis motions, three Seismic retrofit techniques were applied to enhance the Seismic Performance including the addition of shear walls, the addition of RC column jackets, and confinement of the column plastic hinge regions using externally bonded steel plates. Finally, the predicted Seismic Performance for the three retrofitted structures was compared to that for the unretrofitted structure. Varying levels of improvement in the Seismic Performance were demonstrated through the use of the selected Seismic retrofits. Based on the Seismic evaluation with the FEMA 356 criteria, the addition of shear walls provided the greatest improvement in the Seismic Performance of the case study building.

Daming Luo - One of the best experts on this subject based on the ideXlab platform.

  • Seismic Performance of steel reinforced recycled concrete columns under low cyclic loads
    Construction and Building Materials, 2013
    Co-Authors: Jianyang Xue, Xicheng Zhang, Daming Luo
    Abstract:

    Abstract This paper describes an experimental study of the Seismic Performance of steel-reinforced recycled concrete (SRRC) columns. Based on low cyclic loading tests of seven 1:2.5-scaled column specimens, the failure modes, hysteresis loops, skeleton curves, ductility, energy dissipation capacity, and stiffness degradation of SRRC columns were analyzed. The influence of recycled coarse aggregate (RCA) replacement percentages, axial compression ratios, and stirrup ratios on the Seismic Performance of SRRC columns was investigated in detail. The test results show that the Seismic Performance of SRRC columns decreases slightly as the RCA replacement percentage increases. The results also indicate that appropriate design of the axial compression ratio and stirrup ratio can improve the Seismic Performance of SRRC columns. The average values of the ductility factor and the equivalent viscous damping coefficient with respect to the loop of ultimate load of the columns were 3.47 and 0.217, respectively, which reflect the SRRC columns’ good Performance in terms of earthquake resistance.

John B. Mander - One of the best experts on this subject based on the ideXlab platform.

  • Seismic Performance OF TIMBER BRIDGES
    Transportation Research Record, 2000
    Co-Authors: John B. Mander, Dion R. Allicock, Ian M. Friedland
    Abstract:

    Compared with the Seismic Performance of concrete and steel highway bridges, the Seismic Performance of timber bridges is not well understood. This is because, historically, little effort has been spent on documenting the Seismic Performance of timber bridges in past earthquakes or conducting research to develop an improved understanding of the Seismic design or retrofit requirements for timber bridges. Research work sponsored by FHWA and conducted at the University at Buffalo in conjunction with the Multidisciplinary Center for Earthquake Engineering Research to (a) document the Seismic Performance of timber bridges in past earthquakes, (b) experimentally assess the strength and ductility capabilities of timber pile substructures, and (c) conduct a Seismic vulnerability analysis of timber bridges (principally with shaking in the longitudinal direction) to assess the expected modes of failure is presented. Finally, with a particular emphasis on the 1964 Alaska earthquake, conclusions demonstrating why cer...

  • Seismic Performance of Timber Bridges
    Transportation Research Record: Journal of the Transportation Research Board, 2000
    Co-Authors: John B. Mander, Dion R. Allicock, Ian M. Friedland
    Abstract:

    Compared with the Seismic Performance of concrete and steel highway bridges, the Seismic Performance of timber bridges is not well understood. This is because, historically, little effort has been spent on documenting the Seismic Performance of timber bridges in past earthquakes or conducting research to develop an improved understanding of the Seismic design or retrofit requirements for timber bridges. Research work sponsored by FHWA and conducted at the University at Buffalo in conjunction with the Multidisciplinary Center for Earthquake Engineering Research to ( a) document the Seismic Performance of timber bridges in past earthquakes, ( b) experimentally assess the strength and ductility capabilities of timber pile substructures, and ( c) conduct a Seismic vulnerability analysis of timber bridges (principally with shaking in the longitudinal direction) to assess the expected modes of failure is presented. Finally, with a particular emphasis on the 1964 Alaska earthquake, conclusions demonstrating why certain types of behavior lead to failures in timber bridges are drawn.

Mary Beth D Hueste - One of the best experts on this subject based on the ideXlab platform.

  • Seismic retrofit of a reinforced concrete flat slab structure part i Seismic Performance evaluation
    Engineering Structures, 2007
    Co-Authors: Mary Beth D Hueste, Jongwha Bai
    Abstract:

    An evaluation of Seismic Performance was conducted for a reinforced concrete (RC) frame structure representative of 1980s construction in the Central United States. The case study building is a five-story RC flat-slab office building designed for the code requirements used in this region. The structural response was predicted using nonlinear static analysis and nonlinear dynamic analysis with synthetic ground motion records. The FEMA 356 criteria were used to evaluate the Seismic Performance of the case study structure. Because the case study building does not meet the FEMA 356 basic safety objectives for the Memphis motions, three Seismic retrofit techniques were applied to enhance the Seismic Performance including the addition of shear walls, the addition of RC column jackets, and confinement of the column plastic hinge regions using externally bonded steel plates. Finally, the predicted Seismic Performance for the three retrofitted structures was compared to that for the unretrofitted structure. Varying levels of improvement in the Seismic Performance were demonstrated through the use of the selected Seismic retrofits. Based on the Seismic evaluation with the FEMA 356 criteria, the addition of shear walls provided the greatest improvement in the Seismic Performance of the case study building.

  • Seismic retrofit of a reinforced concrete flat-slab structure: Part I — Seismic Performance evaluation
    Engineering Structures, 2007
    Co-Authors: Mary Beth D Hueste, Jongwha Bai
    Abstract:

    An evaluation of Seismic Performance was conducted for a reinforced concrete (RC) frame structure representative of 1980s construction in the Central United States. The case study building is a five-story RC flat-slab office building designed for the code requirements used in this region. The structural response was predicted using nonlinear static analysis and nonlinear dynamic analysis with synthetic ground motion records. The FEMA 356 criteria were used to evaluate the Seismic Performance of the case study structure. Because the case study building does not meet the FEMA 356 basic safety objectives for the Memphis motions, three Seismic retrofit techniques were applied to enhance the Seismic Performance including the addition of shear walls, the addition of RC column jackets, and confinement of the column plastic hinge regions using externally bonded steel plates. Finally, the predicted Seismic Performance for the three retrofitted structures was compared to that for the unretrofitted structure. Varying levels of improvement in the Seismic Performance were demonstrated through the use of the selected Seismic retrofits. Based on the Seismic evaluation with the FEMA 356 criteria, the addition of shear walls provided the greatest improvement in the Seismic Performance of the case study building.