Issam Harik | University of Kentucky (original) (raw)

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Papers by Issam Harik

Journal of Performance of Constructed Facilities, Nov 1, 1990

Information drawn from national engineering magazines, a nationally distributed newspaper, and a ... more Information drawn from national engineering magazines, a nationally distributed newspaper, and a statewide newspaper in Kentucky is presented for 114 bridge failures in the continental U.S. Failures during the construction stage and bridges that were closed in order to avoid failure were not considered. Of the 35 bridge failures reported in the Kentucky newspaper, only one was reported nationally. The study of this literature indicates that the principal source of bridge failures in the United States involves ships, trains, trucks, and cars colliding with the structures. In Kentucky, trucks exceeding the posted weight limit appear to be the major cause. Due to the scattered nature of the information, the formationn of a new division of the Federal Highway Administration or the National Transportation and Safety Board should be considered, whose mission would be to gather data and identify potential deficiencies in bridge design and construction.

Mechanics Computing in 1990's and Beyond, 1991

An iterative finite difference technique is presented in this paper for the analysis of axisymmet... more An iterative finite difference technique is presented in this paper for the analysis of axisymmetric spherical shells with variable wall thickness. The proposed method of solution is based on the classical thin shell theory, and it overcomes the limitations of existing analytical techniques.

RASD 2013 11th International Conference on Recent Advances in Structural Dynamics 1st – 3rd July 2013, Apr 29, 2013

Rapid assessment of a transportation structures’ safety and functionality is a crucial procedure ... more Rapid assessment of a transportation structures’ safety and functionality is a crucial procedure in restoring vital lifeline routes after a hazardous events. However, executing preparatory actions before a hazardous event occurs, and conducting feasible remedial actions during and after such an event, is also essential to the structures safety. This paper introduces a process for hazard mitigation of transportation structures through the example of an application of earthquake mitigation to highway bridges. Earthquake mitigation consists of three components: pre-earthquake, during-earthquake, and post-earthquake mitigation. Pre-earthquake mitigation consists of a seismic evaluation of all applicable bridges and a prioritization of the seismic vulnerability of these bridges. Simultaneously, pre-earthquake mitigation requires the implementation of earthquake-response training programs for the necessary earthquake-response personnel. Unlike hazards such as hurricanes, floods, etc., the short duration and unpredictability of earthquakes, no form of “during-earthquake” mitigation is possible. Post-earthquake mitigation consists of the use of post-earthquake investigation methodologies that assigns a bridge safety-rating to effected bridges to assist in posting or closing bridges to traffic. The methodology and concepts presented herein can be extended to all forms of man-made and natural hazards.

Journal of Bridge Engineering, Aug 1, 2020

Abstract Corrosion increases the nominal stress of reinforcing bars and accelerates the fatigue c... more Abstract Corrosion increases the nominal stress of reinforcing bars and accelerates the fatigue crack propagation. The stress redistribution induced by bond degradation between concrete and rebars ...

Journal of Performance of Constructed Facilities, Nov 1, 1990

Information drawn from national engineering magazines, a nationally distributed newspaper, and a ... more Information drawn from national engineering magazines, a nationally distributed newspaper, and a statewide newspaper in Kentucky is presented for 114 bridge failures in the continental U.S. Failures during the construction stage and bridges that were closed in order to avoid failure were not considered. Of the 35 bridge failures reported in the Kentucky newspaper, only one was reported nationally. The study of this literature indicates that the principal source of bridge failures in the United States involves ships, trains, trucks, and cars colliding with the structures. In Kentucky, trucks exceeding the posted weight limit appear to be the major cause. Due to the scattered nature of the information, the formationn of a new division of the Federal Highway Administration or the National Transportation and Safety Board should be considered, whose mission would be to gather data and identify potential deficiencies in bridge design and construction.

Mechanics Computing in 1990's and Beyond, 1991

An iterative finite difference technique is presented in this paper for the analysis of axisymmet... more An iterative finite difference technique is presented in this paper for the analysis of axisymmetric spherical shells with variable wall thickness. The proposed method of solution is based on the classical thin shell theory, and it overcomes the limitations of existing analytical techniques.

RASD 2013 11th International Conference on Recent Advances in Structural Dynamics 1st – 3rd July 2013, Apr 29, 2013

Rapid assessment of a transportation structures’ safety and functionality is a crucial procedure ... more Rapid assessment of a transportation structures’ safety and functionality is a crucial procedure in restoring vital lifeline routes after a hazardous events. However, executing preparatory actions before a hazardous event occurs, and conducting feasible remedial actions during and after such an event, is also essential to the structures safety. This paper introduces a process for hazard mitigation of transportation structures through the example of an application of earthquake mitigation to highway bridges. Earthquake mitigation consists of three components: pre-earthquake, during-earthquake, and post-earthquake mitigation. Pre-earthquake mitigation consists of a seismic evaluation of all applicable bridges and a prioritization of the seismic vulnerability of these bridges. Simultaneously, pre-earthquake mitigation requires the implementation of earthquake-response training programs for the necessary earthquake-response personnel. Unlike hazards such as hurricanes, floods, etc., the short duration and unpredictability of earthquakes, no form of “during-earthquake” mitigation is possible. Post-earthquake mitigation consists of the use of post-earthquake investigation methodologies that assigns a bridge safety-rating to effected bridges to assist in posting or closing bridges to traffic. The methodology and concepts presented herein can be extended to all forms of man-made and natural hazards.

Journal of Bridge Engineering, Aug 1, 2020

Abstract Corrosion increases the nominal stress of reinforcing bars and accelerates the fatigue c... more Abstract Corrosion increases the nominal stress of reinforcing bars and accelerates the fatigue crack propagation. The stress redistribution induced by bond degradation between concrete and rebars ...

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