Evaluate standard AASHTO I-girders, box sections, planks, and custom sections with gross and transformed composite properties.
AASHTO LRFD bridge girder workflow
AASHTO LRFD Prestressed Concrete Girder Design Software
PaiaRetain provides structural engineers with a comprehensive prestressed concrete bridge girder design and analysis tool based on AASHTO LRFD provisions. Evaluate girder section properties, HL-93 live-load effects, prestress losses, transfer and service stresses, flexural and shear resistance, and deflection through a structured calculation workflow.
Prestressed Girder Design Features
Capabilities below reflect the current calculation module and detailed report workflow.
Evaluate truck, tandem, and lane effects with station-by-station envelopes and governing moment and shear results.
Calculate applicable moment and shear distribution factors for interior and exterior girder behavior, including section-family branches.
Review elastic shortening, approximate time-dependent losses, strand masking, and effective prestress force states.
Check initial, transfer, and final service stresses, flexural resistance, minimum flexural reinforcement, and modified compression field theory shear design.
Review anchorage-zone reinforcement, interface shear, strand development, deflection, camber, and numerical substitutions in the detailed report.
Calculation Workflow
PaiaRetain follows the calculation sequence from normalized inputs and section properties through live-load effects, prestress losses, service checks, strength, local detailing checks, and deflection summaries.
Implementation note: The current module does not expose a standalone longitudinal-reinforcement design routine. Review the generated calculation details and project-specific reinforcement requirements with a qualified bridge engineer.
For equations, assumptions, units, and implementation notes, see the Prestressed Girder Technical Reference.
Sample Prestressed Girder Calculations
Review a sanitized sample report showing section properties, HL-93 effects, prestress losses, stress checks, strength, detailing, and deflection results.
Start Prestressed Girder Design
Open the existing PaiaRetain project workflow to create or select a project, then open the prestressed-girder calculation. Login and registration behavior remain unchanged.