The designer guide to Box Girder by Bethlehem Steel Corporation also L ongitudinal warping stress range can be manually calculated as per BEF (Beam on Elastic Foundation) analogy User Input : Input the manually calculated longitudinal warping stress range for top and bottom flange.Ĭlick Apply to assign the shear connectors. Longitudinal warping stress range for the section withīox flange can be considered in two ways:Īuto Calculation : Fatigue vertical bending moment is increased by 10% for the longitudinal warping stress. Longitudinal Bending Stress and Longitudinal Warping Stress Range. Longitudinal Warping Stress Range : F or the verification of fatigue, flexure stress is calculated as the summation of Value can be taken from Table 6.6.1.2.5-2 N: Number of stress range cycles per truck passage. (ADTT) SL: Number of trucks per day in a single-lane averaged over the design life (3.6.1.4.2). Fracture toughness requirements mentioned in Article 6.10.5.2 are not checked in midas Civil.įrom the Main Menu select Design > Composite Design > Fatigue Parameterįirstly, select the members in the model and enter the following data:Ĭategory: Category defined by 75yr-(ADTT) SL equivalent to Infinite Life (Table 6.6.1.2.3-2) Specify the fatigue parameters required for fatigue check.įatigue resistance of steel composite beams is verified as per Article 6.10.5.1 of AASHTO-LRFD 2012.
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