Laboratory Testing of Precast Bridge Beck Panel Transverse Connections for Use in Accelerated Bridge Construction PDF Download
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Author: Scott D. Porter
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Precast concrete bridge deck panels have been used for decades to accelerate bridge construction. Cracking of the transverse connection between panels is a common problem that can damage deck overlays and cause connection leaking leading to corrosion of lower bridge elements. To better understand the behavior of bridge deck transverse female-to-female connections, shear and moment lab testing were performed at Utah State University for the Utah Department of Transportation. Two existing UDOT connections were tested, a welded stud connection and a post tensioned connection. A variation of the welded connection using rebar was also tested. In addition, two new curved bolt connections were tested as a new method of post tensioning a connection. The manner of connection cracking and associated cracking loads were recorded along with the ultimate connection capacities. The connections were also tested in a low cycle, high amplitude cyclical shear test. Lab testing showed that the welded stud connection had the lowest moment capacity. It also showed that the welded rebar connection had significantly higher strength than the welded stud connection with higher cracking and ultimate loads. Curved bolts were also shown to be a good way to post tension a connection with similar moment capacities as the post tensioned connection. Longer curved bolts were found to perform better than shorter curved bolts.
Author: Scott D. Porter
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Precast concrete bridge deck panels have been used for decades to accelerate bridge construction. Cracking of the transverse connection between panels is a common problem that can damage deck overlays and cause connection leaking leading to corrosion of lower bridge elements. To better understand the behavior of bridge deck transverse female-to-female connections, shear and moment lab testing were performed at Utah State University for the Utah Department of Transportation. Two existing UDOT connections were tested, a welded stud connection and a post tensioned connection. A variation of the welded connection using rebar was also tested. In addition, two new curved bolt connections were tested as a new method of post tensioning a connection. The manner of connection cracking and associated cracking loads were recorded along with the ultimate connection capacities. The connections were also tested in a low cycle, high amplitude cyclical shear test. Lab testing showed that the welded stud connection had the lowest moment capacity. It also showed that the welded rebar connection had significantly higher strength than the welded stud connection with higher cracking and ultimate loads. Curved bolts were also shown to be a good way to post tension a connection with similar moment capacities as the post tensioned connection. Longer curved bolts were found to perform better than shorter curved bolts.
Author:
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 124
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Book Description
Author: Terry J. Wipf
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages :
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Book Description
Also available via the Internet.
Author: Samantha Jo Hockerman
Publisher:
ISBN: 9781109818208
Category :
Languages : en
Pages : 232
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Book Description
In July 2006, construction began on an accelerated bridge project in Boone County, Iowa that was composed of precast substructure elements and an innovative, precast deck panel system. The superstructure system consisted of full-depth deck panels that were prestressed in the transverse direction, and after installation on the prestressed concrete girders, post-tensioned in the longitudinal direction. Prior to construction, laboratory tests were completed on the precast abutment and pier cap elements. The substructure testing was to determine the punching shear strength of the elements. Post-tensioning testing and verification of the precast deck system was performed in the field. The forces in the tendons provided by the contractor were verified and losses due to the post-tensioning operation were measured. The stress (strain) distribution in the deck panels due to the post-tensioning was also measured and analyzed. The entire construction process for this bridge system was documented. Representatives from the Boone County Engineers Office, the prime contractor, precast fabricator, and researchers from Iowa State University provided feedback and suggestions for improving the constructability of this design.
Author: Jeremiah Scott Ingersoll
Publisher:
ISBN:
Category :
Languages : en
Pages : 276
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Book Description
The precast concrete deck bridge (PCDB) is a short span bridge that was commonly used on Iowa's secondary roads approximately forty years ago. Each PCDB span consists of eight to ten simply supported precast panels ranging in length from 19 ft to 36 ft. The panels resemble a steel channel in cross-section; the web is orientated horizontally and forms the roadway deck and the legs act as shallow beams. Bundled reinforcing bars in each leg act as the primary flexural reinforcement. Many of the approximately 600 PCDBs in Iowa show signs of significant deterioration. Typical deterioration consists of spalled concrete cover and corrosion of the bundled primary reinforcement. The objective of this research was to access the structural sufficiency of the deteriorated PCDBs through field and laboratory testing. Four deteriorated PCDBs were instrumented with strain gages to measure strains in both the concrete and reinforcing steel and transducers to measure vertical deflections. Response from loaded trucks was recorded and analyzed. Test results revealed that all measured strains and corresponding stresses were well within acceptable limits. Likewise, measured deflections were much less than the recommended AASHTO value. Load fractions, a measure of live load distribution, were calculated from the deflection data and compared for the four PCDBS. The two PCDBs tested without shear connectors were found to have load fractions considerably higher than those with shear connectors. Laboratory testing consisted of loading twelve deteriorated panels to failure in a four point bending arrangement. Although all panels exhibited significant deflection prior to failure, the experimental capacity of eleven panels exceeded their theoretical capacity. The experimental capacity of the twelfth panel, an extremely distressed panel, was only slightly below its theoretical capacity. Additional laboratory testing consisted of service tests performed on a four panel laboratory PCDB to determine the effect of various shear connection configurations on transverse load distribution. The laboratory PCDB was also utilized in an investigation into the behavior of an overloaded PCDB. Finally, a strengthening retrofit was applied to several panels and tested for its effectiveness.
Author: Ryan Paul Bowers
Publisher:
ISBN:
Category :
Languages : en
Pages : 116
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Book Description
Author: Douglas R. Hartwell
Publisher:
ISBN:
Category :
Languages : en
Pages : 124
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Book Description
Author: Brian Mark Rhett
Publisher:
ISBN:
Category : Bridges
Languages : en
Pages : 145
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Book Description
Author: Alfred Steinle
Publisher: John Wiley & Sons
ISBN: 3433032254
Category : Technology & Engineering
Languages : en
Pages : 378
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Book Description
Building with precast concrete elements is one of the most innovative forms of construction. This book serves as an introduction to this topic, including examples, and thus supplies all the information necessary for conceptual and detailed design.
Author: Edward Petzek
Publisher: Springer Vieweg
ISBN: 9783658140885
Category : Technology & Engineering
Languages : en
Pages : 0
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Book Description
The bridges are vital structures for the transport infrastructure. It is a fact that, in the last decades, composite bridges became a well-liked solution in many European countries as a cost-effective and aesthetic alternative to concrete bridges. Their competitiveness depends on several circumstances such as site conditions, local costs of material and staff and the contractor’s experience. Beside the classical solutions, the new ones with efficient design and construction improve and consolidate the market position of steel construction and steel producing industry. The book contains the technical description, the construction details, economic aspects and the results of monitoring and testing of already executed bridge structures implementing composite dowels realised within the research RFCS project entitled Eco Bridge.
