Program Main Features

This program calculates the response of bridge superstructures to dead loads, superimposed dead loads, post-tensioned loads, live loads, user-defined vertical loads, and temperature loads. Load combinations can be calculated based on LFD or LRFD specifications.

CIP RC/PT Girder also calculates individual girder and total width shear, moment and deflection, axial, support reactions (including live loads), displacements (deflections and rotations), and stresses at default points-of-interest (POI) or at user-specified POIs. CIP RC/PT Girdercan check the stresses (top and bottom of girders) and the ultimate strength of the section at various stages (i.e., Initial and Final,). This program can also check or design the shear capacity of the girders, analyze or determine the approximate level of post-tensioning force required to satisfy the stress requirements, and determine the amount of mild steel required for ultimate strength.

General

Dual design codes, AASHTO Standard (LFD) and LRFD. You can switch between the two specifications at any time during program execution.
Dual units, U.S. and Metric (S.I.). You can switch between the two units at any time during program execution.
Reduce input time using predefined libraries for AASHTO vehicle types, mild steel reinforcement, and post-tensioning tendons. You can modify or add data to each of the custom libraries. Select AASHTO Standard (LFD) design trucks from a predefined library (HS20 Truck, HS20 Lane, H20 Truck, H20 Lane, Military, etc.) or define unlimited new loads manually. Select LRFD design moving loads from a predefined library (Design Truck, Design Tandem, Design Lane, Double Truck, Double Tandem, etc.) or define unlimited new loads manually.

Analysis and Model Generation

Select from Initial and Final, or analysis cases.
User-specified points of interest (POI's).
Define piers, hinges, and abutment locations.
Define support conditions at the bottom of the columns (pin, fixed, or by stiffness).
Specify alignment information consisting of a combination of tangent, horizontal curves, and spirals.
Skew is included in the analytical model.
Create monolithic connection(s) between the superstructure and substructure, or specify Drop-Cap, with optional coupling and stiffness coefficients.
Create whole width or per girder/web models.
Analysis results viewable in text or XY graphic formats.
Pier types include drop-cap or integral/monolithic.
Input lump sum losses or specify from the following loss models (ultimate creep, shrinkage, and relational PT effects included): ACI-209, CEB-FIP, or AASHTO LRFD.
Input side-by-side LRFD permit vehicle effects.
Specify unlimited number of load combinations/limit states.
Analysis results include minimum and maximum effects.
Analysis results for full bridge and individual girders.
Analysis results include individual girder/web and whole width responses for the following: influence lines, shear, moment, axial, deflection/displacements, rotations, reactions, and stresses.
Check for AASHTO Standard and LRFD live load deflections.
Magnify exterior girder shear for effects of pier skew.

Design

Ultimate moment calculations based on equations or strain compatibility using AASHTO specifications.
Calculate capacity/demand ratio at each POI for stresses, ultimate moment, and shear strength.
Top and bottom flange stresses checked according to AASHTO specifications.
Automatic design or specifications check for shear capacity.
Calculation of the approximate level of post-tensioning force (Pjack) required to satisfy stresses.
Minimum compressive strength (f'ci and f'c) automatically computed to satisfy AASHTO compressive stress check.
Automatic computation of the amount of mild reinforcing for ultimate strength.
Design layout of top and bottom flange longitudinal reinforcing.
Specify design parameters for the allowable stress factors and resistance factors.
Program-computed or user-defined live load distribution factor(s).
Program includes multiple lane reduction factors based on AASHTO Standard and multiple presence factors according to AASHTO LRFD.
Serviceability/distribution check performed for reinforced concrete sections.

Loads

Specify uniform temperature loads (rise and fall).
Specify superimposed dead loads (FWS).
Specify pedestrian loads.
CIP RC/PT Girder automatically computes loads due self-weight if included.
Moving live loads consist of AASHTO-type vehicles (lane and truck) and Cooper E-80 train loads.
Define concentrated or distributed user-defined loads.

Post-Tensioning

Specify linear or parabolic tendon variations, or user-defined tendon layout.
User-defined friction and wobble coefficients.
Input anchor set.
Option to input the post-tensioning jacking force or enter as a percentage of the ultimate stress.
Jacking can be specified from the left, right, or both ends.

CIP RC/PT Girder computes additional losses due to horizontal curvature effects.

Automatic computation of tendon elongations.

Post-tensioning losses computed according to AASHTO specification equations, lump-sum method, and time-dependent models from either the ACI-209, CEB-FIP, or AASHTO LRFD models.

Bridge Types

Cast-in-place post-tensioned box girders.
Cast-in-place reinforced box girders.
Cast-in-place reinforced concrete slabs.
Cast-in-place reinforced concrete T-beam bridges
Cast-in-place post-tensioned T-beam bridges
Cast-in-place post-tensioned concrete slabs.

Superstructure Cross Section

Specify parametric or user-defined section properties.
Option for transformed section properties.
Includes cross section variation along the length of the bridge for web transitions and flange/soffit thickening.
Specify linear or parabolic depth variation.
Option to recall previously defined cross sections.
Define vertical or sloped exterior webs.
Input top and bottom fillets between the flange and web junctions.

Column Shapes

Select rectangular, circular, oblong/elliptical, octagonal, or general columns.
Specify linear or parabolic column variation.
Specify unlimited number of columns at a bent.

Export

All analysis results exported/saved to spreadsheets.
Graphics can be exported/saved to DXF/DGN file formats.