BDI Analysis, Modeling, and Data Processing Software

Description

The BDI Suite of analysis and modeling software (WinSac, WinGen and WinGRF) was designed to make the integrated approach a routine process.

WinSAC (Structural Analysis and Correlation)

Key Features:

• General purpose linear-elastic 3-D frame and finite element analysis program.
• Truck loading and truck path definition to simplify analysis of bridge systems.
• Computation of results at sensor locations (strain, rotation, displacement).
• Statistical comparison and error analysis of results with measured responses.
• Optimization process to calibrate model (minimize error between measured and computed responses).
• Generate response envelopes for series of load cases (truck path) and combine envelopes for multi-lane load conditions.
• Calculate Load Rating Factors and identify critical elements.
  

WinGRF (Data viewing, processing and comparison)

Key Features:

Modeling

• Simple parametric modeling of planar bridge structures.
• Import DXF files from AutoCAD or IntelliCAD for complex 3-D models.
• Visual implementation of all structural geometry, boundary conditions, cross-section definition and assignment, and loading.

Load Test Simulation

• Visual sensor placement on model. Strain gages, LVDTs, tilt meters can be applied to model at same locations as in field and identified with the same Intelliducer name to assure data comparisons are done accurately.
• Truck loading and truck path simulation.
• Association of load test data with modeled truck paths. STS data points that correspond to each analysis load case (truck position) are retrieved for data comparison.

WinGEN (Model generation for planar bridge structures)

Key Features:

Data management

• Load multiple STS data files.
• Store workspaces with STS data, WinSAC results, and graph settings.
• Edit STS load position markers.
• Associate load events with STS data files and series of WinSAC load cases.

Plotting

• Plot response histories as function of time, load position, or measured data.
• Calculate and plot common data functions (neutral axis, average, curvature, FFT)
• Plot measured responses with computed responses provided by WinSAC.

Data Processing

• Extract maximum and minimum values for each sensor and provide associated load position or event.
• Extract data for specified load position or event.
• Digital filter data to reduce noise or unwanted frequencies.
• Combine data files from multiple instrumentation setups with common loading.
• Average multiple data files with common load application.
• Perform and update stress cycle data (rainflow histograms) for fatigue analyses.