Abstract
Comprehensive parametric studies consisting of a number of real bridges are conducted using the refined approach described in part I of the paper. Important system parameters including span length, girder spacing, material strength, bridge skew, diaphragm, number of traffic lanes, bridge model, and analysis type are considered. Live-load distribution factors considering maximum moment condition and maximum shear condition are derived using various methods. The simplified methods of estimating the distribution factors are carefully examined with the refined method. Advantages of the proposed refined approach are demonstrated.
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