Huntersafe508

B8 is suitable for the calculation of reinforced concrete beams and pre-tensioned girders (long-line method). The software performs all required verifications of the load-bearing capacity (also for the accidental and earthquake design situations) as well as serviceability verifications. The comprehensive>

The results are produced sepa-rately for the top and bottom of the girder.

In addition to this, you can find special features such as air-entrained concrete, aggregate for wear, decrease of the dimensional allowance for pre-fabricated components.

Verifications

Ultimate limit state (USL):
- Bending with longitudinal force (including resisting tensile force coverage)
- Shear resistance, for cast-in-place supplements inclusive bearing capacity of the joints
- Lateral buckling in the installed state and in the erecting state (method by Stiglat and Mann)
- Determination of the tensile splitting reinforcement
- Anchorage of the prestressing reinforcement

Serviceability limit state (SLS):

- Concrete stresses, steel stresses (prestressed steel, reinforcing steel)
- Crack width (loading, minimum reinforcement), verification of the decompression, if required
- Deflection for a selectable load combination of the SLS with consideration of state II includ-ing tension stiffening and shrinkage
- Changes in length due to temperature, creep and shrinkage

All verifications are performed at the beginning and the end of creep stages, which are determined by the casting and the usage of the girder. The creep factor and the shrinkage strain are calculated in detail and are taken into account in the verifications. The pretension remaining after the deduction of losses due to creep, shrinkage and relaxation is con-sidered effective.

Results

The calculation is based on a sec-tion grid laid over the girder. Every verification is performed on each individual cross section of the grid. The result list reveals the section with the highest utilization or the lowest safety reserve, which is the critical section for this verification.

A quick overview is available via the view of the critical cross sections, which also shows the utilization of the respective verification.

The graphical representation of the utilization behaviour allows the easy identification of points where a limit is exceeded. The values processed in the graphical representation can also be dis-played in the form of a table.

In order to find out why the limit in a verification was exceeded, you can display each calculation step in detail. An advisor suggests appropriate corrections.

Design settings

The user can control the inclusion of calculation assumptions that are permissible in particular cases of application. The control options include:

- Definition of independent imposed and live loads
- Combination of permanent loads for each span separately
- Verification of the crack width limitation without minimum reinforcement
- Definition of a gradual application of the pre-tensioning force
- Definition of reduced material safety coefficients for precast components
- The consideration of a thermal treatment allows the utilization of increased strength at the moment when tensioning force applies and the reduction of the creep factors.
- At the moment when the tensioning force applies, a higher permissible compressive stress and an increased compressive resistance of the concrete can be taken into account, if the corresponding prerequisites are satisfied.esults

• Reinforced concrete slab
• Reinforced concrete beam
• Steel girder
• Timber beam
• Beam without reinforcement analysis
• Aluminum girder

• Biaxial effect of actions, reinforced concrete beam, steel, timber, aluminum
• Reinforcement for reinforced concrete beam, interface to CAD

• The application performs the design and/or stress analysis for the pre-selected cross section dimensions for the material types concrete, steel and timber.

• Reinforced concrete design according to

• Steel design according to

• Timber construction standards:

• Aluminum:

• Calculation of the deformations in state II for reinforced concrete cross sections according to EN 1992 / DIN 1045-1.
• Crack width evidence (limiting diameter) and stress analysis.
• Consideration of the durability requirements.
• Calculation and consideration of the creep coefficient and the shrinkage strain in serviceability analyses.
• Optimization of the dimensioning and design with steel girders and timber beams.
• The rigidity within the span can be constant or variable.
• You can define hinges.

• You can optionally consider shear deformations with timber beams.
• Analysis of the shear joint for slabs and T-beams.
• You can perform an analysis of the connection of the compression flange (shear analysis) for T-beams.

Load import
You can import bearing loads (from DLT items) that you have calculated in other items (<F5> key).
Block-outs (holes)
You can define round or rectangular block-outs for reinforced concrete beams, the calculation is performed in accordance with Booklet 399 DAfStb.

Bearing reactions
The bearing reactions are put out for the simple and/or γ -fold loads depending on the application control and the task. In addition, the bearing reactions are put out according to groups of actions.
Interfaces

• The loads can be transferred to the column applications

• You can perform the torsional buckling resistance and elasticplastic analyses per data transfer toBT II (second-order
  bending torsion analysis) or ST7
  application.

• Suspension reinforcement is not considered.
• The anchorage of longitudinal bars is not analyzed at haunches and jumps