The Experts below are selected from a list of 255 Experts worldwide ranked by ideXlab platform
Junsuk Kang - One of the best experts on this subject based on the ideXlab platform.
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Live Load Distribution Factor at the Piers of Skewed Continuous Multicell Box Girder Bridges Subjected to Moving Loads
Transportation Research Record, 2015Co-Authors: Iman Mohseni, A. R. Khalim, Junsuk KangAbstract:The multicell box girder bridge is a popular choice of designers because of its large torsional stiffness. The skewness at the support line of bridges has a significant influence on Distribution of live loads. The current American bridge design code, AASHTO load and resistance factor design (LRFD), defines several correction factor expressions to account for the skew effect in bridges. In addition, the effect of skewness on reactions of continuous multicell box girder bridges is obtained by using the skew correction factor of Shear or by the Shear Distribution factor of straight bridges, despite a significant disparity between the Shear and reaction that is observed in skewed bridges. This study investigated the effect of skewness on the reactions and Shear Distribution factors for three continuous multicell box girder bridges. There was a significant difference between reactions at the piers and the Shear Distribution factors of skewed bridges. Thus, a statistical analysis was used to propose new equatio...
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Live Load Distribution Factor at the Piers of Skewed Continuous Multicell Box Girder Bridges Subjected to Moving Loads
Transportation Research Record: Journal of the Transportation Research Board, 2015Co-Authors: Iman Mohseni, A. R. Khalim, Junsuk KangAbstract:The multicell box girder bridge is a popular choice of designers because of its large torsional stiffness. The skewness at the support line of bridges has a significant influence on Distribution of live loads. The current American bridge design code, AASHTO load and resistance factor design (LRFD), defines several correction factor expressions to account for the skew effect in bridges. In addition, the effect of skewness on reactions of continuous multicell box girder bridges is obtained by using the skew correction factor of Shear or by the Shear Distribution factor of straight bridges, despite a significant disparity between the Shear and reaction that is observed in skewed bridges. This study investigated the effect of skewness on the reactions and Shear Distribution factors for three continuous multicell box girder bridges. There was a significant difference between reactions at the piers and the Shear Distribution factors of skewed bridges. Thus, a statistical analysis was used to propose new equations for the skew correction factors and the external girder correction factor of Shear and reaction to improve the accuracy of the AASHTO LRFD specifications.
Iman Mohseni - One of the best experts on this subject based on the ideXlab platform.
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Live Load Distribution Factor at the Piers of Skewed Continuous Multicell Box Girder Bridges Subjected to Moving Loads
Transportation Research Record, 2015Co-Authors: Iman Mohseni, A. R. Khalim, Junsuk KangAbstract:The multicell box girder bridge is a popular choice of designers because of its large torsional stiffness. The skewness at the support line of bridges has a significant influence on Distribution of live loads. The current American bridge design code, AASHTO load and resistance factor design (LRFD), defines several correction factor expressions to account for the skew effect in bridges. In addition, the effect of skewness on reactions of continuous multicell box girder bridges is obtained by using the skew correction factor of Shear or by the Shear Distribution factor of straight bridges, despite a significant disparity between the Shear and reaction that is observed in skewed bridges. This study investigated the effect of skewness on the reactions and Shear Distribution factors for three continuous multicell box girder bridges. There was a significant difference between reactions at the piers and the Shear Distribution factors of skewed bridges. Thus, a statistical analysis was used to propose new equatio...
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Live Load Distribution Factor at the Piers of Skewed Continuous Multicell Box Girder Bridges Subjected to Moving Loads
Transportation Research Record: Journal of the Transportation Research Board, 2015Co-Authors: Iman Mohseni, A. R. Khalim, Junsuk KangAbstract:The multicell box girder bridge is a popular choice of designers because of its large torsional stiffness. The skewness at the support line of bridges has a significant influence on Distribution of live loads. The current American bridge design code, AASHTO load and resistance factor design (LRFD), defines several correction factor expressions to account for the skew effect in bridges. In addition, the effect of skewness on reactions of continuous multicell box girder bridges is obtained by using the skew correction factor of Shear or by the Shear Distribution factor of straight bridges, despite a significant disparity between the Shear and reaction that is observed in skewed bridges. This study investigated the effect of skewness on the reactions and Shear Distribution factors for three continuous multicell box girder bridges. There was a significant difference between reactions at the piers and the Shear Distribution factors of skewed bridges. Thus, a statistical analysis was used to propose new equations for the skew correction factors and the external girder correction factor of Shear and reaction to improve the accuracy of the AASHTO LRFD specifications.
Diego Pazó - One of the best experts on this subject based on the ideXlab platform.
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Collective synchronization in the presence of reactive coupling and Shear diversity
Physical Review E, 2011Co-Authors: Ernest Montbrió, Diego PazóAbstract:We analyze the synchronization dynamics of a model obtained from the phase reduction of the mean-field complex Ginzburg-Landau equation with heterogeneity. We present exact results that uncover the role of dissipative and reactive couplings on the synchronization transition when Shears and natural frequencies are independently distributed. As it occurs in the purely dissipative case, an excess of Shear diversity prevents the onset of synchronization, but this does not hold true if coupling is purely reactive. In this case, the synchronization threshold turns out to depend on the mean of the Shear Distribution, but not on all the other Distribution's moments.
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Shear diversity prevents collective synchronization
Physical review letters, 2011Co-Authors: Ernest Montbrió, Diego PazóAbstract:Large ensembles of heterogeneous oscillators often exhibit collective synchronization as a result of mutual interactions. If the oscillators have distributed natural frequencies and common Shear (or nonisochronicity), the transition from incoherence to collective synchronization is known to occur at large enough values of the coupling strength. However, here we demonstrate that Shear diversity cannot be counterbalanced by diffusive coupling leading to synchronization. We present the first analytical results for the Kuramoto model with distributed Shear and show that the onset of collective synchronization is impossible if the width of the Shear Distribution exceeds a precise threshold.
A. R. Khalim - One of the best experts on this subject based on the ideXlab platform.
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Live Load Distribution Factor at the Piers of Skewed Continuous Multicell Box Girder Bridges Subjected to Moving Loads
Transportation Research Record, 2015Co-Authors: Iman Mohseni, A. R. Khalim, Junsuk KangAbstract:The multicell box girder bridge is a popular choice of designers because of its large torsional stiffness. The skewness at the support line of bridges has a significant influence on Distribution of live loads. The current American bridge design code, AASHTO load and resistance factor design (LRFD), defines several correction factor expressions to account for the skew effect in bridges. In addition, the effect of skewness on reactions of continuous multicell box girder bridges is obtained by using the skew correction factor of Shear or by the Shear Distribution factor of straight bridges, despite a significant disparity between the Shear and reaction that is observed in skewed bridges. This study investigated the effect of skewness on the reactions and Shear Distribution factors for three continuous multicell box girder bridges. There was a significant difference between reactions at the piers and the Shear Distribution factors of skewed bridges. Thus, a statistical analysis was used to propose new equatio...
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Live Load Distribution Factor at the Piers of Skewed Continuous Multicell Box Girder Bridges Subjected to Moving Loads
Transportation Research Record: Journal of the Transportation Research Board, 2015Co-Authors: Iman Mohseni, A. R. Khalim, Junsuk KangAbstract:The multicell box girder bridge is a popular choice of designers because of its large torsional stiffness. The skewness at the support line of bridges has a significant influence on Distribution of live loads. The current American bridge design code, AASHTO load and resistance factor design (LRFD), defines several correction factor expressions to account for the skew effect in bridges. In addition, the effect of skewness on reactions of continuous multicell box girder bridges is obtained by using the skew correction factor of Shear or by the Shear Distribution factor of straight bridges, despite a significant disparity between the Shear and reaction that is observed in skewed bridges. This study investigated the effect of skewness on the reactions and Shear Distribution factors for three continuous multicell box girder bridges. There was a significant difference between reactions at the piers and the Shear Distribution factors of skewed bridges. Thus, a statistical analysis was used to propose new equations for the skew correction factors and the external girder correction factor of Shear and reaction to improve the accuracy of the AASHTO LRFD specifications.
Ernest Montbrió - One of the best experts on this subject based on the ideXlab platform.
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Collective synchronization in the presence of reactive coupling and Shear diversity
Physical Review E, 2011Co-Authors: Ernest Montbrió, Diego PazóAbstract:We analyze the synchronization dynamics of a model obtained from the phase reduction of the mean-field complex Ginzburg-Landau equation with heterogeneity. We present exact results that uncover the role of dissipative and reactive couplings on the synchronization transition when Shears and natural frequencies are independently distributed. As it occurs in the purely dissipative case, an excess of Shear diversity prevents the onset of synchronization, but this does not hold true if coupling is purely reactive. In this case, the synchronization threshold turns out to depend on the mean of the Shear Distribution, but not on all the other Distribution's moments.
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Shear diversity prevents collective synchronization
Physical review letters, 2011Co-Authors: Ernest Montbrió, Diego PazóAbstract:Large ensembles of heterogeneous oscillators often exhibit collective synchronization as a result of mutual interactions. If the oscillators have distributed natural frequencies and common Shear (or nonisochronicity), the transition from incoherence to collective synchronization is known to occur at large enough values of the coupling strength. However, here we demonstrate that Shear diversity cannot be counterbalanced by diffusive coupling leading to synchronization. We present the first analytical results for the Kuramoto model with distributed Shear and show that the onset of collective synchronization is impossible if the width of the Shear Distribution exceeds a precise threshold.