Click on a project for more information and screenshots:
- Incident Tracking System
- AASHTO LRFD Bridge Design Electronic Spec
- AASHTOWare Bridge Design
- AASHTOWare Bridge Rating
- BRASS™ Suite of Programs
- BT Beam
- CRSI Slab Bridge Designer
- KDOT Sign Support Structure Software
- NCHRP 12-62/12-62 A
- NCHRP 12-50
- PCA National Bridge Inventory User Interface
Bridgetech developed and is maintaining an incident tracking system at: http://www.wydot-brass.com for the Wyoming Department of Transportation’s BRASS™ Suite of Programs.
Users of the BRASS™ software can visit this site to report any issues they may find. From there, we promptly receive notice and can efficiently assign who will work with you to resolve the issue.
This project was a pilot study to determine the feasibility of supporting an electronic version of AASHTO LRFD Bridge Design Specifications. The intent was to modernize the specifications and allow for automated version control. This provides the benefit of being able to easily track changes to the specifications across multiple versions.
Other requirements of the project included: the ability to print a hard copy of the same quality as the current specifications, the ability to store user-created margin notes, the ability to link directly to external reports/references, the use of dynamic graphics in SVG format, and automated bookmarks.
Principle engineers and programmers. Developed a structural analysis engine that was ultimately implemented for the pier substructure analysis within BrD. Verifying the pier loading and analysis for solid shaft piers. This project involved significant application of the AASHTO LRFD Specifications. This program was formerly known as Opis.
Principle engineers and programmers. Developing and maintaining the BRASS™ export and import modules for superstructures. This project involved significant application of the planning for AASHTO LRFD and LRFR. This program was formerly known as Virtis.
Teaming with the Wyoming Department of Transportation (WYDOT), BridgeTech designs, develops, maintains, and supports users for several programs associated with highway transportation structures. These programs are distributed by WYDOT.
Click a link for descriptions and screenshots:
BT Beam is a simple-to-use analysis engine for the analysis of simple and continuous girders using the AASHTO LRFD Specifications. It provides influence lines, computes distributed dead loads, and computes factored loads. Finally, load envelopes are reported. Output is ASCII and a delimited table for importing results into a spreadsheet is provided.
For details and pricing, please contact us.
- * Simple to use
- * Easily paste data into spreadsheet
- * Reasonably priced
An application was developed that aids in the design of reinforced concrete slab bridges according to the AASHTO LRFD method. Based on a minimum amount of user input, the application performs a beam-line analysis in order to determine shear and moment values at all points within the structure. The loads are appropriately factored according to the LRFD method. Influence lines as well as unfactored, factored, and critical values are plotted for both shear and moment. The user is then led through a series of iterative steps for rebar selection and specification checking.
An application was developed to aid in the design and specification checking of sign truss structures designed for over-highway use. The application was modeled on the current design practice of the Kansas DOT office. A Three-dimensional structural model is generated and passed to STAAD for structural analysis. The results are used to perform simple specification checking. The entire sign truss (including the signs themselves) can be viewed in 3D using the OpenInventor visualization library.
Principle engineers and programmers. Implemented the AASHTO LRFR Specifications in BRASS-GIRDER(LRFD)™. Used the NCHRP 12-50 process for parametric studies and reporting.
The objective of this project was to develop a methodology for bridge-design software validation. This objective has been achieved with the development of “Process 12-50”, a systematic method of comparing and evaluating bridge design and analysis software. Process 12-50 also provides a standardized report format for presenting and comparing results for a specific bridge design and a powerful method for formally reviewing specification changes.
Michael Baker Jr., Inc., assisted by BridgeTech, Inc., Modjeski and Masters, Inc., and Paul D. Thompson, performed the research.
Simple “S-over” live load distribution factors for shear and moment have been used for bridge design since the 1930s. The traditional factors, which are included in the AASHTO Standard Specifications, are easy to apply, but can be overly conservative and even unconservative in some parameter ranges.
New, more accurate, and more complex, live load distribution factor equations were developed under NCHRP Project 12-26 and were included in the AASHTO LRFD Bridge Design Specifications (LRFD specifications). The “S-over” factors are not included in the LRFD specifications. The new distribution factor equations have limited ranges of applicability. When the ranges of applicability are exceeded the LRFD specifications mandate that refined analysis is required.
Designers find the complexity of the current equations troubling. Simpler live load distribution factor equations would be welcomed by the design community. The objective of this research was to develop new LRFD live load distribution factor design equations for shear and moment that are simpler to apply and have a wider range of applicability than those in the current LRFD specifications and reduce the need for refined analysis.
This research and the companion NCHRP Project 12-62A was performed by BridgeTech, Inc., with contributions from Tennessee Technological University, HDR, Inc., and Dennis Mertz. The report fully documents the research leading to the recommended live load distribution factors.
A user interface was developed to query and format National Bridge Inventory (NBI) data stored within an Access database. The application is used to obtain information based on many user-specified criteria including material type, construction year, the US state in which the bridge resides, etc. Reports based on the resultant data are automatically generated. These reports include numerical as well as plotted data.
Solutis is an object-oriented framework for carrying out finite element analyses. The software is modular in nature, allowing it to easily accommodate different analysis types, constraint handlers, and solution algorithms. Solutis has the capability to perform non-linear analyses, supporting both material and geometrically non-linear elements, within its library of 2D and 3D elements. The framework is written in standard C++ and can be compiled on various platforms.