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Now showing items 1-6 of 6

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    A Study of Concrete Bridge Columns Using Innovative Materials Subjected to Cyclic Loading 

    O'Brien, Melissa; Saiidi, Mehdi S.; Sadrossadat-Zadeh, Mahmoud (1/1/2007)
    In an attempt to improve performance of concrete bridge columns subjected to strong earthquakes, three 0.2 scale circular columns using innovative materials in the plastic hinge zone were tested under cyclic loading. The ...
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    Analytical Study of NEESR-SG 4-Span Bridge Model Using OpenSees 

    Sadrossadat-Zadeh, Mahmoud; Saiidi, Mehdi S. (2/1/2007)
    This study focuses on the development of a 4-span bridge analytical model using OpenSees. Three ¼ -scale 4-span bridge models are included for testing on the University of Nevada, Reno (UNR) shake tables as a part of a ...
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    Effect of Strain rate on Stress-Strain Properties and Yield Propagation in Steel Reinforcing Bars 

    Sadrossadat-Zadeh, Mahmoud; Saiidi, Mehdi S. (1/1/2007)
    Dynamic loading due to earthquakes alters the stress-strain properties and strain distribution in steel reinforcement. Past research on dynamic load effects has been under constant strain rates, and the applicability of ...
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    Experimental Evaluation of Performance of Conventional Bridge Systems 

    Nelson, Robert; Saiidi, Mehdi S.; Sadrossadat-Zadeh, Mahmoud (10/1/2007)
    As part of a multi-university research project utilizing the Network for Earthquake Engineering Simulation (NEES), a quarter-scale 110 ft (33.5 m) long asymmetric conventional reinforced concrete bridge model was tested ...
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    Seismic Load Path in Steel Girder Bridge Superstructures 

    Sadrossadat-Zadeh, Mahmoud; Saiidi, Mehdi S.; Itani, Ahmad M.; Ladkany, Samaan (1/1/2005)
    Past earthquakes have shown that the inherent strength assumed in a bridge superstructure does not always prevent damage to components of steel plate girder superstructures during moderate to large earthquake excitation. ...
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    Seismic Vulnerability Evaluation and Retrofit Design of Las Vegas Downtown Viaduct 

    Sadrossadat-Zadeh, Mahmoud; Saiidi, Mehdi S.; Itani, Ahmad M.; Ladkany, Samaan (1/1/2005)
    This study focused on the seismic vulnerability assessment and development of retrofit methods for Las Vegas Downtown Viaduct. The viaduct was built in 1960�s and similar to other bridges designed prior to 1970, lacks the ...