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Partial Depth Precast Concrete Deck Panels on Curved Bridges : Finite Element Analytical Model of PCPs
2017 ... Colter Roskos [and seven others] · A number of full-scale tests have been carried out in the laboratory focused on the shear performance of simulated precast concrete deck panels (PCP). Shear tests were carried out to simulate the type of loading that will be applied to the deck panels as they are engaged as a bracing element. As
6816-P1 [CTR] ... Product 0-6816-P1
Full-text Link:
1 MB
5-6719-01, Bridge Strengthening Design and Load Testing for a Continuous Steel Girder Bridge with Post-Installed Shear Connectors
2017 ... Research Performed by Center for Transportation Research; Research Supervisor Michael D. Engelhardt; Researchers Kerry Kreitman [and three others] · "Many older bridges in the state of Texas were constructed with floor systems consisting of a non-composite concrete deck over steel girders. While the individual elements in these
6719-01 Summary [CTR] ... PSR 5-6719-01-S ... Project Summary
Full-text Link:
62 KB
Implementation Project [on] Strengthening a Continuous Steel Girder Bridge in Lakeport, Texas with Post-Installed Shear Connectors. Phase 1, Bridge Strengthening Design and Load Testing
2017 ... Kerry L. Kreitman [and four others] · In Implementation Project 5-6719, a non-composite continuous steel girder bridge located in Lakeport, Texas will be strengthened using techniques developed in TxDOT Research Project 0-6719. This strengthening technique involves the use of post-installed shear connectors in positive moment
6719-01-1 [CTR] ... FHWA/TX-16/5-6719-01-1
Full-text Link:
2.6 MB
0-6564, Improved Cross Frame Details
[2016] ... Research Performed by: Center for Transportation Research; Research Supervisor: Todd Helwig; Researchers: Anthony Battistini [and four others] · "Currently, the Texas Department of Transportation (TxDOT) relies upon the use of standard details for cross frames in steel I-girder bridges—most frequently, the X-type and K-
6564 Summary [CTR] ... PSR 0-6564-S ... Project Summary
Full-text Link:
70 KB
0-6785, Extending the Use of Elastomeric Bearings to Higher-Demand Applications
2016 ... Research Performed by: Center for Transportation Research; Research Supervisor: Todd Helwig; Researchers: Konstantinos Belivanis [and five others] · "Elastomeric bearing pads have been utilized for support of bridge superstructures for several decades; however, the majority of these applications have typically consisted
6785 Summary [CTR] ... PSR 0-6785-S ... Project Summary
Full-text Link:
268 KB
0-6719, Strengthening Continuous Steel Girders with Post-Installed Shear Connectors
2016 ... Research Performed by: Center for Transportation Research; Research Supervisor: Michael D. Engelhardt; Researchers: Kerry Kreitman [and five others] · "A number of older bridges in Texas were constructed with floor systems consisting of a non-composite concrete slab over steel girders. Many of these
6719 Summary [CTR] ... PSR 0-6719-S ... Project Summary, 6719
Full-text Link:
345 KB
Extending Use of Steel-Laminated Elastomeric Bearings to Higher Demand Applications
2016 ... Konstantinos Victor Belivanis [and six others] · Elastomeric bearings have historically been used on bridges with short to moderate spans. The resulting demand on the bearings is usually not very severe in terms of the necessary support reaction or the deformational requirements. The bearings have historically showed good
6785-1 [CTR] ... FHWA/TX-16/0-6785-1
Full-text Link:
10.6 MB
Strengthening Existing Continuous Non-Composite Steel Girder Bridges Using Post-Installed Shear Connectors
2016 ... Kerry Kreitman [and six others] · This study investigated the use of post-installed shear connectors for strengthening existing non-composite continuous steel girder bridges. The existing bridges considered in this study have strength deficiencies in both the positive and the negative moment regions. The type of post-installed shear
6719-1 [CTR] ... FHWA/TX-16/0-6719-1
Full-text Link:
3.7 MB
Structural Monitoring of the World’s First Precast Network Arch Bridge during Construction
2014 ... Hossein Yousefpour, Todd Helwig, Oguzhan Bayrak · This report provides an overview of a monitoring study on the West 7th Street Bridge in Ft Worth, Texas, that was carried out by The University of Texas at Austin (UT). The West 7th Street Bridge was designed by the Texas Department of Transportation (TxDOT) and is believed
5253-03-1 [CTR] ... FHWA/TX-14/5-5253-03-1
Full-text Link:
12 MB
Improved Cross Frame Details for Steel Bridges
2014 ... Anthony Battistini [and five others] · Cross frames are critical members for the stability of straight and curved steel bridges. Conventional cross frames are often fabricated from steel angles; however these members have relatively poor structural behavior. Because of the low buckling strength, cross frames with angle diagonals
6564-1 [CTR] ... FHWA/TX-13/0-6564-1
Full-text Link:
14.2 MB
UT Curved Girder Analysis Tools (UTCGAT) -- Version: 1.0.0
2012 ... [Todd Helwig, University of Texas at Austin] · This software product was developed and is maintained by the University of Texas at Austin. UTCGAT is a suite of software tools for the analysis of curved girders. The suite consists of UT Bridge and UT Lift. UT Bridge is a 3-dimensional finite element program for the analysis of curved
5574-01-P2 [CTR] ... Product 5-5574-01-P2
Full-text Link:
Web page with link to license agreement and software download
Cross-Frame and Diaphragm Layout and Connection Details
2011 ... RS: Michael Engelhardt; Researchers: Anthony Battistini [and five others] · The primary objective of this project was to develop an improved detail for attaching skewed cross-frames to girders that provides higher stiffness and better structural performance than the conventional bent plate detail. A secondary objective of this
5701 Summary [CTR] ... PSR 0-5701-s ... Project Summary Report, 0-5701
Full-text Link:
Cross-Frame Connection Details for Skewed Steel Bridges
2010 ... Craig Quadrato [and six others] · This report documents a research investigation on connection details and bracing layouts for stability bracing of steel bridges with skewed supports. Cross-frames and diaphragms play an important role in stabilizing steel girders, particularly during construction. The commonly used bent plate
5701-1 [CTR] ... FHWA/TX-11/0-5701-1
Full-text Link:
15 MB
Implementation of Straight and Curved Steel Girder Erection Design Tools Construction : Summary
2010 ... Jason Stith [and six others] · Project 0-5574 "Curved Plate Girder Design for Safe and Economical Construction," resulted in the development of two design tools, UT Lift and UT Bridge. UT Lift is a spreadsheet-based program for analyzing steel girders during lifting while UT Bridge is a three-dimensional finite element
5574-01-1 [CTR] ... FHWA/TX-11/5-5574-01-1
Full-text Link:
411 KB
UT Lift 1.1
2010 ... by Jason Stith [and four others] · The purpose of this spreadsheet is to provide a tool and give information to an engineer when deciding the safety of lifting a horizontally curved steel I-girder with one crane and two lift clamps. The spreadsheet has been developed to indicate the necessary inputs and highlight the calculated
5574-01-P1 [CTR] ... Product 5-5574-01-P1
Full-text Link:
Now version 1.3 (accessed 11/23/2015)
Guidance for Erection and Construction of Curved I-Girder Bridges : Technical Report -- revised
2010 ... Jason Stith [and eight others] · This report summarizes the methods, results, and recommendations from a research investigation on the behavior of horizontally curved girders during construction. The primary focus of this study is the behavior during early stages of construction when little or no bracing is provided. Girder
5574-1 [CTR] ... FHWA/TX-10/0-5574-1
Full-text Link:
5.8 MB
Impact of Overhang Construction on Girder Design
2010 ... Seongyeong Yang [and four others] · Economical constraints on the design of bridges usually necessitate the use of as few girders as possible across the bridge width. The girders are typically uniformly spaced transversely with the deck extending past the fascia girders, thereby resulting in an overhang. While designers
5706-1 [CTR] ... FHWA/TX-10/0-5706-1
Full-text Link:
4.6 MB
Guidelines for Design and Safe Handling of Curved I-Shaped Steel Girders
2010 ... Jason Stith [and five others] · The purpose of this set of guidelines is to summarize recommendations from work completed as part of the Texas Department of Transportation (TxDOT) Research Project 0-5574 entitled "Curved Plate Girder Design for Safe and Economic Construction." The research included field tests, three-
5574-P1 [CTR] ... Product 0-5574-P1
Full-text Link:
90 KB
Impact of Overhang Construction on Girder Design
2009 ... Todd Helwig [and four others] · Economical constraints on the design of bridges usually necessitate the use of as few girders as possible across the bridge width. The girders are typically uniformly spaced transversely with the deck extending past the fascia girders, thereby resulting in an overhang. While designers commonly
5706 Summary [CTR] ... PSR 0-5706 ... Project Summary Report, 0-5706
Full-text Link:
Curved Plate Girder Design for Safe and Economical Construction
2009 ... Todd Helwig [and eight others] · Horizontally curved steel I-girder bridges are important components of the highway system that are commonly used for providing efficient transfer of traffic between major thoroughfares. The critical stage for the stability of these curved bridges generally occurs during early stages of erection and
5574 Summary [CTR] ... PSR 0-5574 ... Project Summary Report, 0-5574
Full-text Link:
Design Guidelines for Steel Trapezoidal Box Girder Systems
2007 ... Todd Helwig [and four others] · The frequency of use of steel box girders has increased in the state of Texas and throughout the United States over the past 10 years. Some of the advantages of the structural shape that have led to the increased utilization include improved aesthetic, maintenance, and structural benefits.
4307-1 [CTR] ... FHWA/TX-07/0-4307-1; [Product 0-4307-P1]
Full-text Link:
Steel Trapezoidal Girders : State of the Art
2007 ... Todd Helwig, Eric Williamson and Reagan Herman · Since 1995, the Texas Department of Transportation (TxDOT) has funded several studies on trapezoidal box girders. The research in these studies was some of the first detailed work on curved box girders that had been carried out in nearly twenty years. Although the studies
4307 Summary [TTI] ... PSR 0-4307-S ... Project Summary Report, 0-4307
Full-text Link:
Behavior of Trapezoidal Box Girders with Skewed Supports : Summary
2006 ... Reagan S. Herman, Todd A. Helwig and Dawei Li · The purpose of this investigation was to improve understanding of trapezoidal box girder systems with skewed supports. The impact of external K-frames on the behavior of the internal K-frames and top lateral truss was also studied. The research investigation included both
4148 Summary [UH] ... PSR 0-4148-S ... Project Summary Report, 0-4148
Full-text Link:
Cross-Frame and Diaphragm Behavior in Bridges with Skewed Supports : Summary
2005 ... Todd A. Helwig [and three others] · Lateral torsion buckling is a failure mode that is generally critical during the construction stages for steel bridges. Prior to curing of concrete deck, the steel girders must support the entire load. The buckling capacity of the girders is improved by providing cross-frames and diaphragms at
1772 Summary [UH] ... PSR 0-1772-S ... Project Summary Report, 0-1772
Full-text Link:
120 KB
Lateral Bracing of Bridge Girders by Permanent Metal Deck Forms : Summary
2005 ... Todd A. Helwig, O. Ozgur Egilmez and Charles A. Jetann · Lateral torsional buckling is a failure mode that often controls the design of steel bridge girders during construction. Bracing in the form of cross-frames and diaphragms is often provided at locations along the bridge length to reduce the unbraced length and increase the
4145 Summary [UH] ... PSR 0-4145-S ... Project Summary Report, 0-4145
Full-text Link:
Lateral Bracing of Bridge Deck Girders by Permanent Metal Deck Forms
2005 ... by Todd Helwig, Ozgur Egilmez, and Charles Jetann · Traditional bracing systems for steel bridge girders typically consist of cross frames and diaphragms spaced along the length of the bridge. Other sources of bracing may provide improved performance and economy. Permanent metal deck forms are often used as formwork for
4145-1 [UH] ... Report 0-4145-1
Full-text Link:
3.1 MB
Behavior of Trapezoidal Box Girders with Skewed Supports
2004 ... by Todd A. Helwig, Reagan S. Herman, and Dawei Li · Trapezoidal steel box girder systems are frequently used in Texas for the construction of highway interchanges and elevated expressways in urban areas. There are a number of aspects of box girder bridges, including both aesthetic and structural advantages, which
4148-1 [UH] ... Research Report 0-4148-1
Full-text Link:
3.3 MB
Cross-Frame and Diaphragm Behavior for Steel Bridges with Skewed Supports
2003 ... Todd Helwig and Liqun Wang · Steel bridge girders are prone to buckling from construction loads during casting of the concrete for the composite deck. The buckling capacity of the steel girders can be increased by providing bracing at intermediate locations along the girder length. The intermediate bracing typically takes the
1772-1 [UH] ... 1772-1
Full-text Link:
24 MB
Field and Computational Studies of Steel Trapezoidal Box Girder Bridges
2000 ... by Todd Helwig and Zhanfei Fen · Trapezoidal steel box girders are seeing increased use in the state of Texas as well as throughout the United States. In addition to a number of serviceability and aesthetic advantages for trapezoidal box girders, the large torsional stiffness of the closed box section is also a major structural
1395-3 [UH] ... 0-1395-3
Full-text Link:
2.4 MB
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