Load distribution in girder bridges
How deck loads are shared between longitudinal girders.
In development
Technical notes
Derivations, conventions, and practical context that make the calculations transparent.
Start with the fundamentals: Introduction to Structural Analysis
Simply supported beam under a moving point load
Influence lines for support reactions, shear force, and bending moment.
Read note 2Simply supported beam under a uniform load
Support reactions and internal-force diagrams for a full-span uniform load.
Read note 3Simply supported beam subject to three moving concentrated loads
Support reactions, shear force, and bending moment at a beam section, using influence-line ordinates.
Read note 4Moving load models for bridges
Axle loads and distributed lane loads: influence-line ordinates, signed areas, and a worked example of reactions and internal forces.
Read note 5Maximum bending moment at a section under three moving loads
Find the maximum using the influence line, including loads entering and leaving the span.
Read note 6Maximum bending moment under three moving loads with unequal spacings
Evaluate the three load-at-section candidates for different load magnitudes and spacings.
Read note 7Maximum and minimum shear under three moving loads
Evaluate six one-sided candidates and distinguish the complete-vehicle response from same-sign envelopes.
Read noteEnvelope computation
Determining governing maximum and minimum structural effects.
In developmentSteel beam resistance
Fundamentals for checking steel beam resistance.
In development