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Composite steel bridges EXPERT

PONTI® compositesteel EXPERT - FEM-System for composite steel/concrete bridges including TRIMAS® fem

New features

In addition to the ability to run under Windows 11, the following new features are available in version 22:

  • For neck fillet welds of welded open or closed cross-sections, the required weld thickness in the ultimate limit states and fatigue is determined according to the simplified method, taking into account the minimum weld thicknesses.
  • For the fatigue check, the notch cases are specified separately for the top and bottom chords.
  • The required seam thicknesses are displayed graphically along the beam.
  • Optionally, the requirements according to RE-ING can be considered for tightly welded hollow boxes.
  • For rolled beams in concrete, the determination of shrinkage forces and shrinkage moments is made possible according to 3 different methods, which take into account the uncracked or cracked state or the average of both states.

The following new features are available since version 21:

  • Setting of variants for secondary construction stages is now done automatically. The n0 cross-section variants are replaced by the corresponding cross-section variants of the secondary construction stages.
  • When creating a new steel composite cross-section, the variants nP, nPT, nS and nD are generated automatically. For the new WiB cross sections, these are the corresponding variants for positive My.
  • For all cross-sections, it is now possible to specify an analysis and design time. The calculation of the creep and shrinkage coefficients and the reduction ratios can be optionally performed for this purpose. In the composite design, this time of consideration is displayed in the tree view.
  • For the longitudinal shear capacity of head bolt dowels in the composite joint, verification method 1 is now extended by verification method 2, which also takes into account the non-elastic composite behavior (MEd > Mel,Rd) between longitudinal shear force and shear force for class 1 and 2 cross-sections.

Overview 

  • Consideration of system, load and cross-section history
  • Determination of the cracking and the participating slab areas
  • Frame structures and general FEM solution
  • Different analysis options
  • Classic girder grid and surface models
  • Total cross-section method with time-dependent cross-section variants n0, nP, nPT, nD, nS
  • Rolled and welded steel profiles
  • Option for box and prefabricated girders
PONTIcompositesteel-Details

Basic module for the processing of steel composite bridges according to DIN-EN 1994, EN 1994 as well as DIN-FB 104 of mixed, spatial FE systems made of structural steel, steel composite or reinforced concrete. The program application supports in particular the special input, calculation and design possibilities for general systems of steel composite bridges and offers the following advantages:

  • Different types of cross-sections entered individually for each partial cross-section - structural steel, concrete chord and reinforcement.
  • Structural steel cross-section can be composed of 3 top chord, 3 web and 3 bottom chord partial cross-sections each
  • Concrete chord with up to 5 partial cross-sections with different inclinations
  • Reinforcement is entered in 2 layers
  • Creep and shrinkage is handled according to the total cross-section method
  • cross-section states (variants) for different load conditions (long-term loads, short-term loads and secondary loads)
  • for each cross-section state, both the total cross-section values and the contributing cross-section values of the concrete chord and the steel flanges are determined for edge and inner span or edge and inner column, respectively
  • Result graphics for geometry with dimensions, chord thicknesses and effective widths
  • Calculation of the transformed elastic cross-section values with corresponding reduction factors and the plastic cross-section values
  • Influence of the interacting plate areas according to DIN-EN, EN as well as DIN-FB are considered
  • Influence of cracking according to DIN-EN, EN as well as DIN-FB are considered
  • influence of load history according to DIN-EN, EN as well as DIN-FB are considered
  • influence of secondary effects according to DIN-EN, EN as well as DIN-FB are considered
  • automatic determination of equivalent temperature loads
  • secondary creep due to concreting and finishing loads (PT loads)
  • secondary creep due to column settlement or planned deformation (D loads)
  • primary and secondary shrinkage (S loads)
  • Variant technique, assigning the variants per line in the as-built condition
  • Variant technique, change of variants per line over all construction stages
  • superposition according to DIN-EN, EN as well as DIN-FB
  • Detailed graphical representation on the system

In the ultimate limit state, fatigue limit state, serviceability limit state and bond strength limit state, the following verifications are performed according to DIN-EN, EN and DIN-FB:
Ultimate limit state (except fatigue)

  • Cross-section classification
  • Plastic and elastic moment load capacity
  • Plastic and elastic shear force bearing capacity
  • Normal force - moment - shear force interaction (N-M-V/T interaction)
  • Flange-induced web buckling

Ultimate limit state Fatigue

  • damage-equivalent fatigue width structural steel
  • damage equivalent fatigue width reinforcement
  • Concrete fatigue in compression

Serviceability limit state

  • Stress Limitation Structural Steel
  • Stress limitation for reinforcing steel
  • Stress limitation for concrete in compression
  • Minimum reinforcement (initial cracking)
  • completed cracking
  • quasi-permanent deformations

Composite reinforcement

  • longitudinal shear resistance in the bonded joint
  • dowel bearing capacity
  • dowel cover line
  • Structural design of the dowel joint
  • Longitudinal shear capacity of the concrete belt
  • damage equivalent dowel fatigue

Cross-section optimization

  • Change partial cross-sections from existing cross-sections in the design
  • replace cross-sections in the design
  • create new cross-sections and then replace them in the design
  • immediate recalculation of the cross-section values and subsequently of the checks

 

Benefits of PONTI®compositesteel EXPERT

The programme system PONTI® compositesteel EXPERT also facilitates the analysis of mixed spatial wood, steel or reinforced concrete systems. PONTI® compositesteel EXPERT is a powerful FEM system for structural and bridge engineering and in particular offers the following advantages:

  • Graphic-oriented input with optimum control of all modifications
  • Graphic-oriented surface during design with an interactive optimisation of the cross section
  • Fast and safe processing of bridge systems on the basis of axial data
  • The calculation/design is performed in accordance with the overall cross section method
  • Simple acquisition of the system, cross-section and load histories of construction stages
  • Forces of the cracking in the concrete chord are considered
  • Automatic calculation of the secondary effects caused by creep and shrinkage
  • Powerful and economic design according to the DIN technical report, EC & EN with clear result graphics and specific detail information
  • Document output in the RTprint / RTF format in accordance with the user’s requirements
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