Theory

SteelBridge is based on the AASHTO LRFD manual and the WSDOT Bridge Rating Manual.

Input

• Defining Members
• Finite Element Processor Error and Warning Messages
• Input Local Member Orientation

Shapes

• Shape Properties
• Computation of the Negative Area Values
• Shape Geometry Nomenclature

Members

• Truss Member End Releases
• Explanation of Member End Release Codes
• Explanation of Auto Connect Switch
• Explanation of Start and End Distances
• Bearing Seats

LFR Capacity and Rating Theory

• [SS-5.1.2] Compute Capacities
• [SS-5.2.1.1] Compactness of Type A(1)
• [SS-5.2.1.1] Compactness of Type A (2)
• [SS-5.2.1.3] Mu for Type A
• [SS-5.2] Cal. Capacity for Line Member
• [SS-5.2.1.3.1.1] Compute Mr for Section Type A, unbraced noncompact section
• [SS-5.2.1.3.1] Compute Mu for Type A, unbraced noncompact section
• [SS-5.2.1.3.1.2] Compute Rb for Section Type A, unbraced noncampact section
• [SS-5.2.1] Negative Moment Capacity
• [SS-5.2.2.4.1] Compute Mu for unbraced noncompact section Type A
• [SS-5.2.2.2] Compactness of Type B (2)
• [SS-5.2.2.1.1] Compactness of Type A (2) Unsymmetrical Member Check
• [SS-5.2.2] Positive Moment Capacity
• [SS-5.2.2.4] Mu for Type A
• [SS-5.2.2.2] Compactness of Type B (1)
• [SS-5.2.2.3.1] Compute Mp, Dcp, for Type C (B)
• [SS-5.2.3] Shear capacity
• [SS-5.2.2.4.1.2] Compute Rb for Section Type A
• [SS-5.2.2.5.2] Compute Mu, for Section Type C w/ non-compact negative moment
• [SS-5.2.2.1] Compactness of Type A (1)
• [SS-5.2.2.3.1] Compute Mp, Dcp, for Type C
• [SS-5.2.2.4.1.1] Compute Mr for Type A, unbraced noncompact section
• [SS-5.2.2.1] Compactness of Type A (2)
• [SS-5.2.2.5.1] Compute Mu, for Section Type C w/ compact negative moment
• [SS-5.2.2.5] Compute Mu for Section Type C
• [SS- 5.3] Compute Capacity of Non-line Member
• [SS-5.3.1] Compute Strength Ratio for Tension / Moment
• [SS- 5.3.2] Compute Mp, Fe, for compression members
• [SS-5.3.3] Compute Mu for Box Section
• [SS-5.3.4] Compute Mu for Open Section
• [SS-5.3.5] Compute Strength Ratio for Compression / Moment
• [SS-5.3.6] Check local Slenderness Ratio for Compression Members
• [SS-6.0] Compute Member Rating
• [SS-6.1] Compute Line Member Rating
• [SS-6.1.1] Compute Moment Rating Factor for WSDOT, Inventory, Operating Level
• [SS-6.1.2] Compute Shear Rating Factor for WSDOT Inventory, Operating
• [SS-6.3] Compute Bearing Rating
• [SS-6.3.1] Compute Column Capacity
• [SS-6.3.2] Compute Bearing on Stiffener
• [SS-6.3.3] Compute Connection to Web
• [SS-6.4] Compute Hinge Rating
• [SS-6.4.1] Link Plate Tension
• [SS-6.4.1.1] Compute Ag, An
• [SS-6.4.2] Link Plate Bearing
• [SS-6.4.3] Top & Bottom Pin Bearing
• [SS-6.4.4] Left & Right Web Plate Bearing
• [SS-6.4.5] Pin Shear (Double)