The Experts below are selected from a list of 57 Experts worldwide ranked by ideXlab platform

Nadeem A Siddiqui - One of the best experts on this subject based on the ideXlab platform.

  • seismic behavior of as built aci complying and cfrp Repaired exterior rc beam column joints
    Journal of Composites for Construction, 2011
    Co-Authors: Yousef A Alsalloum, Tarek H Almusallam, Saleh H Alsayed, Nadeem A Siddiqui
    Abstract:

    In this paper, the efficiency and effectiveness of carbon-fiber-reinforced polymer (CFRP) sheets for upgrading the shear strength and ductility of a seismically deficient exterior beam-column joint were studied and compared with an American Concrete Institute (ACI)-based design joint Specimen. One as-built joint Specimen, representing the preseismic code design and construction practice for joints and one ACI-based design joint Specimen, satisfying the seismic design requirements of the current code of practice were cast. The as-built Specimen was used as baseline (control) Specimen. These two Specimens (i.e., the as-built control and the ACI-based Specimens) were subjected to cyclic lateral load histories to induce damage equivalent to damage expected from a severe earthquake. The damaged control Specimen was then Repaired by filling its cracks with epoxy and externally bonding CFRP sheets to the joint, the beam, and part of the column regions. This Specimen was identified as the Repaired Specimen. The Repaired Specimen was subjected to a similar cyclic lateral load history, and its response history was recorded. The response histories of the as-built control, the Repaired, and the ACI-based design Specimen were then compared. The test results demonstrated that externally bonded CFRP sheets can effectively improve both the shear strength and the deformation capacity of seismically deficient and damaged beam-column joints to a state comparable to the ACI-based design joint.

Yousef A Alsalloum - One of the best experts on this subject based on the ideXlab platform.

  • seismic behavior of as built aci complying and cfrp Repaired exterior rc beam column joints
    Journal of Composites for Construction, 2011
    Co-Authors: Yousef A Alsalloum, Tarek H Almusallam, Saleh H Alsayed, Nadeem A Siddiqui
    Abstract:

    In this paper, the efficiency and effectiveness of carbon-fiber-reinforced polymer (CFRP) sheets for upgrading the shear strength and ductility of a seismically deficient exterior beam-column joint were studied and compared with an American Concrete Institute (ACI)-based design joint Specimen. One as-built joint Specimen, representing the preseismic code design and construction practice for joints and one ACI-based design joint Specimen, satisfying the seismic design requirements of the current code of practice were cast. The as-built Specimen was used as baseline (control) Specimen. These two Specimens (i.e., the as-built control and the ACI-based Specimens) were subjected to cyclic lateral load histories to induce damage equivalent to damage expected from a severe earthquake. The damaged control Specimen was then Repaired by filling its cracks with epoxy and externally bonding CFRP sheets to the joint, the beam, and part of the column regions. This Specimen was identified as the Repaired Specimen. The Repaired Specimen was subjected to a similar cyclic lateral load history, and its response history was recorded. The response histories of the as-built control, the Repaired, and the ACI-based design Specimen were then compared. The test results demonstrated that externally bonded CFRP sheets can effectively improve both the shear strength and the deformation capacity of seismically deficient and damaged beam-column joints to a state comparable to the ACI-based design joint.

Tung M Tran - One of the best experts on this subject based on the ideXlab platform.

  • retrofitting nonseismically detailed exterior beam column joints using concrete covers together with cfrp jacket
    Construction and Building Materials, 2014
    Co-Authors: Muhammad N S Hadi, Tung M Tran
    Abstract:

    Abstract This paper introduces a new method for retrofitting reinforced concrete (RC) exterior beamcolumn T joints, using segmental circular concrete covers together with Carbon Fibre Reinforced Polymer (CFRP). Two RC T connections without transverse reinforcement at the joints were cast and tested. The first connection (Strengthened Specimen, TS) was glued with the concrete covers around the column at the joint area to modify it from a square to a circular section and then it was wrapped with CFRP to strengthen its capacity. A load was first applied on the second connection (Repaired Specimen, TR) to cause a serious failure then it was Repaired. The repair scheme of the second connection was identical to the first connection. Results of testing the two connections have shown that the performances of both the strengthened and the Repaired connections were improved significantly. The glued concrete covers worked well with the existing concrete to resist shear load. Moreover, the wrap on the modified circular sections helped in increasing the effectiveness of CFRP by increasing the confinement effect on the concrete and reduce the possibility of debonding of CFRP at the joints.

Tarek H Almusallam - One of the best experts on this subject based on the ideXlab platform.

  • seismic behavior of as built aci complying and cfrp Repaired exterior rc beam column joints
    Journal of Composites for Construction, 2011
    Co-Authors: Yousef A Alsalloum, Tarek H Almusallam, Saleh H Alsayed, Nadeem A Siddiqui
    Abstract:

    In this paper, the efficiency and effectiveness of carbon-fiber-reinforced polymer (CFRP) sheets for upgrading the shear strength and ductility of a seismically deficient exterior beam-column joint were studied and compared with an American Concrete Institute (ACI)-based design joint Specimen. One as-built joint Specimen, representing the preseismic code design and construction practice for joints and one ACI-based design joint Specimen, satisfying the seismic design requirements of the current code of practice were cast. The as-built Specimen was used as baseline (control) Specimen. These two Specimens (i.e., the as-built control and the ACI-based Specimens) were subjected to cyclic lateral load histories to induce damage equivalent to damage expected from a severe earthquake. The damaged control Specimen was then Repaired by filling its cracks with epoxy and externally bonding CFRP sheets to the joint, the beam, and part of the column regions. This Specimen was identified as the Repaired Specimen. The Repaired Specimen was subjected to a similar cyclic lateral load history, and its response history was recorded. The response histories of the as-built control, the Repaired, and the ACI-based design Specimen were then compared. The test results demonstrated that externally bonded CFRP sheets can effectively improve both the shear strength and the deformation capacity of seismically deficient and damaged beam-column joints to a state comparable to the ACI-based design joint.

Saleh H Alsayed - One of the best experts on this subject based on the ideXlab platform.

  • seismic behavior of as built aci complying and cfrp Repaired exterior rc beam column joints
    Journal of Composites for Construction, 2011
    Co-Authors: Yousef A Alsalloum, Tarek H Almusallam, Saleh H Alsayed, Nadeem A Siddiqui
    Abstract:

    In this paper, the efficiency and effectiveness of carbon-fiber-reinforced polymer (CFRP) sheets for upgrading the shear strength and ductility of a seismically deficient exterior beam-column joint were studied and compared with an American Concrete Institute (ACI)-based design joint Specimen. One as-built joint Specimen, representing the preseismic code design and construction practice for joints and one ACI-based design joint Specimen, satisfying the seismic design requirements of the current code of practice were cast. The as-built Specimen was used as baseline (control) Specimen. These two Specimens (i.e., the as-built control and the ACI-based Specimens) were subjected to cyclic lateral load histories to induce damage equivalent to damage expected from a severe earthquake. The damaged control Specimen was then Repaired by filling its cracks with epoxy and externally bonding CFRP sheets to the joint, the beam, and part of the column regions. This Specimen was identified as the Repaired Specimen. The Repaired Specimen was subjected to a similar cyclic lateral load history, and its response history was recorded. The response histories of the as-built control, the Repaired, and the ACI-based design Specimen were then compared. The test results demonstrated that externally bonded CFRP sheets can effectively improve both the shear strength and the deformation capacity of seismically deficient and damaged beam-column joints to a state comparable to the ACI-based design joint.