See the BGS Support Information document, linked in the same manner as the BGS User Guide, for instructions on how to report bugs and wishes about program functionality or get technical support. Technical support is available to all TxDOT BGS users and any consultant BGS users designing bridges for TxDOT.IMPORTANT NOTE: This 2/20/2020 release of BGS, Version 9.1.6 is a technical release intended to address Windows 10 compatibility and the false positives for malware by malware scanning software issues. The false positive for malware issue has persisted since shortly after the 02/12/2016 posting of BGS 9.1.6, as malware detection software began becoming increasingly more sensitive. The repackaging of the installer includes revised names and content for some documentation. The functionality of the compiled elements of the BGS software have not changed, hence the compile program version remains 9.1.6.
This TxDOT-customized version of PGSuper is versatile, user friendly, Windows-based software for the design, analysis, and load rating of multi-span precast-prestressed concrete bridge beams/girders in accordance with the AASHTO LRFD Bridge Design Specifications (thru the 9th Edition, 2020) and by TxDOT design policies and guidelines. Properties of TxDOT standard I-girders (TxGirders), U beams, slab beams, decked slab beams, box beams, and X-beams and TxDOT specific design criteria are included in templates and libraries published by TxDOT on a server accessible via the Internet. Thus, the software is capable of periodically updating the installed templates and libraries with the most current versions published by TxDOT. Though these templates and libraries are subject to change, the user may save PGSuper project data with its associated templates, libraries and settings in a .pgs file which can subsequently be opened by PGSuper preserving the templates, libraries, settings and design data of the bridges as originally designed.
Concrete Box Culvert Design !!LINK!!
The flexural design feature computes the required number and pattern of prestressing strands and the minimum required release and final concrete strengths. Specification checking evaluates girders for compliance with strength, serviceability, and detailing criteria. Horizontal and vertical shear design, analysis, and load rating is also facilitated.
CULV5 is an analysis tool for concrete box culverts. The program determines the forces acting on each of the different members of the culvert using the direct stiffness method. The user provides input data for loading conditions, structure geometry, and member sizes. The program outputs the member forces for use in either a working stress design or a load factor design in accordance with the AASHTO Standard Specifications for Highway Bridges, 17th Ed. for highway loadings, and AREMA 2006 in the case of E72 and E80 loadings.
See the PSTRS14 Support Information Document, linked in the same manner as the PSTRS14 v6.1.1 User Guide, for instructions on how to report bugs and wishes about program functionality or get technical support. Technical support is available to all TxDOT PSTRS14 users and any consultant PSTRS14 users designing bridges for TxDOT.
This manual presents a guide for the proper installation of concrete pipe. For many years, the American Concrete Pipe Association has conducted comprehensive research and analysis of the factors which affect the field performance of concrete pipe. This manual also presents a guide for the proper installation of concrete box culverts. While focusing on the construction of the pipe-/box-soil system, this manual addresses those factors critical to the completion of the entire system, from delivery of the concrete pipe/box culverts to the jobsite, to the acceptance of the installed pipeline/box line.
Attached for inclusion in Division 2 of the NJDOT Bridges and Structures Design Manual are five new standard drawings. These additional standard drawings are for the design of precast reinforced concrete box culverts. These drawings will standardize the plan development of precast reinforced concrete box culverts and aid Designers in providing consistent plans.
If you have have questions about concrete pipe or box culverts, you're in the right spot. If you can't find what you are looking for, though, don't hesitate to reach out and someone from the ACPA will reach out and help find you a solution.
The direct design method follows the conventional design procedure for concrete members where demand versus capacity is determined using load and resistance factors. Due to advancements in computer technology, the direct design method has become easier to evaluate than it was in the past. However, the indirect method which has been used for approximately 70 years has demonstrated conservatism and is a proven design method.
The fill height of concrete pipes can be reduced to as low as the project requires, provided the pipe is designed to sustain the applied loads. In some cases where extremely heavy machinery will be traveling over the pipe, a concrete pipe with strength above the highest class of pipe denoted in ASTM C76 and AASHTO M170 may need to be utilized. This can be accomplished by working with your local producer. However, in most cases where an AASHTO HL-93 highway load is applied, and the fill height is equal to or greater than 1 foot of cover, a standard Class III pipe or greater will suffice.
The American Concrete Pipe Association has a network of Regional Engineers who are connected with representatives of state concrete pipe associations and Technical Resource Engineers. You can contact reach out to your Regional Engineer by going to our Regional Information page. These representatives are available to present information to groups on a wide variety of design and quality control topics.
All Bridge Designer (ABD) Memorandums are directives from IDOT's Bureau of Bridges and Structures advising bridge designers on bridge design policy changes prior to the policy's incorporation in this office's standards and manuals.Special Instructions: The current ABD memos are available for download. Users can download individual memos or all memos. To download an individual file to your hard drive click the link with the right mouse button, then choose "save target as." To view the file, click the link with the left mouse button. A Table of Contents (TOC) with links to all the current memos is also available. The TOC is replacing the annual written notification of changes in the status of ABD memos. After downloading, the ABD memo files and the Table of Contents file must be placed in the same directory. Files are in Adobe PDF format.
A culvert is a structure that channels water past an obstacle or to a subterranean waterway. Typically embedded so as to be surrounded by soil, a culvert may be made from a pipe, reinforced concrete or other material. In the United Kingdom, the word can also be used for a longer artificially buried watercourse.[1]
Culverts are commonly used both as cross-drains to relieve drainage of ditches at the roadside, and to pass water under a road at natural drainage and stream crossings. When they are found beneath roads, they are frequently empty. A culvert may also be a bridge-like structure designed to allow vehicle or pedestrian traffic to cross over the waterway while allowing adequate passage for the water.
Culverts must be properly sized and installed, and protected from erosion and scour. Many U.S. agencies such as the Federal Highway Administration, Bureau of Land Management,[5] and Environmental Protection Agency,[6] as well as state or local authorities,[4] require that culverts be designed and engineered to meet specific federal, state, or local regulations and guidelines to ensure proper function and to protect against culvert failures.
Culverts are classified by standards for their load capacities, water flow capacities, life spans, and installation requirements for bedding and backfill.[2] Most agencies adhere to these standards when designing, engineering, and specifying culverts.
If the failure is sudden and catastrophic, it can result in injury or loss of life. Sudden road collapses are often the result of poorly designed and engineered culvert crossing sites or unexpected changes in the surrounding environment cause design parameters to be exceeded. Water passing through undersized culverts will scour away the surrounding soil over time. This can cause a sudden failure during medium-sized rain events. Accidents from culvert failure can also occur if a culvert has not been adequately sized and a flood event overwhelms the culvert, or disrupts the road or railway above it.
Ongoing culvert function without failure depends on proper design and engineering considerations being given to load, hydraulic flow, surrounding soil analysis, backfill and bedding compaction, and erosion protection. Improperly designed backfill support around culverts can result in material collapse or failure from inadequate load support.[7][2]
Safe and stable stream crossings can accommodate wildlife and protect stream health, while reducing expensive erosion and structural damage. Undersized and poorly placed culverts can cause problems for water quality and aquatic organisms. Poorly designed culverts can degrade water quality via scour and erosion, as well as restrict the movement of aquatic organisms between upstream and downstream habitat. Fish are a common victim in the loss of habitat due to poorly designed crossing structures.
Culverts that offer adequate aquatic organism passage reduce impediments to movement of fish, wildlife, and other aquatic life that require instream passage. Poorly designed culverts are also more apt to become jammed with sediment and debris during medium to large scale rain events. If the culvert cannot pass the water volume in the stream, then the water may overflow the road embankment. This may cause significant erosion, ultimately washing out the culvert. The embankment material that is washed away can clog other structures downstream, causing them to fail as well. It can also damage crops and property. A properly sized structure and hard bank armoring can help to alleviate this pressure. 2ff7e9595c
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