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Innovative Connection Details For Full Depth Precast Bridge Deck Panels For Use On Prestressed Concrete Girders
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Book Synopsis Innovative Connection Details for Full-depth Precast Bridge Deck Panels for Use on Prestressed Concrete Girders by : Stephen Price
Download or read book Innovative Connection Details for Full-depth Precast Bridge Deck Panels for Use on Prestressed Concrete Girders written by Stephen Price and published by . This book was released on 2010 with total page 251 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Recommendations for the Connection Between Full-depth Precast Bridge Deck Panel Systems and Precast I-beams by :
Download or read book Recommendations for the Connection Between Full-depth Precast Bridge Deck Panel Systems and Precast I-beams written by and published by . This book was released on 2007 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precast bridge deck panels can be used in place of a cast-in-place concrete deck to reduce bridge closure times for deck replacements or new bridge construction. The panels are prefabricated at a precasting plant providing optimal casting and curing conditions, which should result in highly durable decks. Precast panels can be either full-depth or partial-depth. Partial-depth panels act as a stay-in-place form for a cast-in-place concrete topping. This study investigated only the behavior of full-depth precast panels. The research described in this report had two primary objectives. The first was to develop a performance specification for the grout that fills the haunch between the top of the beam and the bottom of the deck panel, as well as the horizontal shear connector pockets and the panel-to-panel joints. Tests were performed using standard or modified ASTM tests to determine basic material properties on eight types of grout. The grouts were also used in tests that approximated the conditions in a deck panel system. Based on these tests, requirements for shrinkage, compressive strength, and flow were established for the grouts. It was more difficult to establish a test method and an acceptable performance level for adhesion, an important property for the strength and durability of the deck panel system. The second objective was to quantify the horizontal shear strength of the connection between the deck panel and the beam prestressed concrete beams. This portion of the research also investigated innovative methods of creating the connection. Push-off tests were conducted using several types of grout and a variety of connections. These tests were used to develop equations for the horizontal shear strength of the details. Two promising alternate connections, the hidden pocket detail and the shear stud detail, were tested for constructibility and strength. The final outcome of this study a set of recommendations for the design, detailing, and construction of the connection between full-depth precast deck panels and prestressed concrete I-beams. If designed and constructed properly, the deck panel system is an excellent option when rapid bridge deck construction or replacement is required.
Book Synopsis NU-DECK Precast Deck Panels & Innovative Bridge Research and Construction by : Maher K. Tadros
Download or read book NU-DECK Precast Deck Panels & Innovative Bridge Research and Construction written by Maher K. Tadros and published by . This book was released on 2004 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :Richard A. Miller (Professional engineer) Publisher :Transportation Research Board ISBN 13 :0309087937 Total Pages :202 pages Book Rating :4.3/5 (9 download)
Book Synopsis Connection of Simple-span Precast Concrete Girders for Continuity by : Richard A. Miller (Professional engineer)
Download or read book Connection of Simple-span Precast Concrete Girders for Continuity written by Richard A. Miller (Professional engineer) and published by Transportation Research Board. This book was released on 2004 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction and Research Approach -- Findings -- Interpretation, Appraisal, and Application -- Interpretation, Appraisal, and Application -- References -- Appendixes.
Book Synopsis Extending Span Ranges of Precast Prestressed Concrete Girders by : Reid Wilson Castrodale
Download or read book Extending Span Ranges of Precast Prestressed Concrete Girders written by Reid Wilson Castrodale and published by Transportation Research Board. This book was released on 2004 with total page 603 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.
Book Synopsis Experimental Evaluation of Partial Depth Precast Concrete Deck Panels Subjected to Shear Loading by : John Robert Kintz
Download or read book Experimental Evaluation of Partial Depth Precast Concrete Deck Panels Subjected to Shear Loading written by John Robert Kintz and published by . This book was released on 2017 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: Horizontally curved girder bridges are often utilized for highway interchanges and other projects with restricted right-of-way. The large torsional demands caused by the girder geometry often require these systems to have extensive bracing, typically in the form of cross frames or diaphragms, to increase the torsional stiffness of the girder system during the construction phase. The most critical stage for the bracing is during the deck placement, when the noncomposite girders must resist the full construction load. Partial depth precast concrete panels (PCPs) are prestressed concrete panels used primarily as stay-in-place (SIP) formwork for straight girder systems. They are placed on full-length extruded bedding strips epoxied to the girder top flange, and the remaining depth of the deck is cast above. This is a time-efficient method of construction, and has become an attractive option due to ease of constructability and deck longevity. Although the panels have not been used on horizontally curved girder systems, there is a desire by bridge owners and contractors to use the forms in some curved girder applications. In addition to using the panels on curved girder applications, engaging the in-plane shear stiffness of the panels may lead to significant bracing in both straight and horizontally curved girder applications. A research investigation focused on measuring the behavior of PCPs acting as a shear diaphragm, as well as to develop an adequate connection between the PCPs and the girders was conducted at The University of Texas at Austin. Four PCP connection details were developed and tested at two different bedding strip heights. These connections were designed for a range of capacities, and in-plane shear load was applied until failure using a frame mechanism assembly. The experimental results showed that the connected PCPs had significant shear stiffness and strength, with the panels reaching shear capacities between 91 and 154 kips before failure depending on the connection detail that was utilized. A 46 to 70 percent increase in shear stiffness was also observed when the bedding strip height was reduced from 4 inches to 1⁄2 inch. All panels greatly exceeded the design capacity using the ACI design predictions, with 7 of 8 panels eventually failing due to concrete side face breakout. The eighth PCP failed from weld rupture in which the weld connecting the WT and the girder flange began to unzip.
Book Synopsis Applications of Partial Depth Precast Concrete Deck Panels on Horizontally Curved Bridges by : Colter Roskos
Download or read book Applications of Partial Depth Precast Concrete Deck Panels on Horizontally Curved Bridges written by Colter Roskos and published by . This book was released on 2018 with total page 1044 pages. Available in PDF, EPUB and Kindle. Book excerpt: Horizontally curved bridges are commonly used for direct connectors at highway intersections as well as other applications. The majority of curved bridges utilize continuous steel curved I-girder or tub girder systems. One of the most critical construction stages from a stability perspective is placement of the wet concrete deck at which point the girders must support the full construction load of the system until the deck stiffens and acts compositely with the girders. Bridges with a curved geometry experience significant torsional forces and require a substantial amount of bracing to control deformation during construction. There are a variety of bracing systems required for bridges during construction. These bracing systems included cross frames and lateral trusses for I-girder systems and top lateral trusses and internal and external cross frames for steel tub girders. While partial depth precast concrete panels (PCPs) are commonly used as stay-in-place formwork for straight bridges, the panels are not currently permitted on horizontally curved girder systems in Texas. TxDOT would like to extend the use of PCPs to bridges with curved girders. This report focuses on the stability of PCPs that rest on polystyrene bedding strips. The project studied the behavior for PCPs with and without a positive connection to steel girders. The experimental portion of this study consists of large-scale PCP shear tests and large-scale combined bending and torsion tests on both a twin steel I-girder system and on a single steel tub girder. The PCP shear tests were used to develop a simple and effective connection between the PCPs and the girder, as well as to empirically determine the in-plane stiffness and strength of the PCP/connection system. The large-scale girder tests were used to investigate the performance of PCPs and their connection to a system that simulates the load experienced in a realistic construction situation. Also, parametric finite element modeling of the PCPs and the curved girder systems were performed and validated with the results from the experimental tests. The finite element models were used to develop an understanding of the fundamental behavior of the steel girder systems in combination with the PCP systems. In addition to focusing on connection methods to the PCPs, guidelines were also developed for cases where the panels can be used on horizontally curved girder systems without a positive connection to the girders
Book Synopsis Recommendations for the Use of Precast Deck Panels at Expansion Joints by :
Download or read book Recommendations for the Use of Precast Deck Panels at Expansion Joints written by and published by . This book was released on 2008 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Systematic Investigation of Shear Connections Between Full-depth Precast Panels and Precast Prestressed Bridge Girders by : Robert Wayne Brey
Download or read book A Systematic Investigation of Shear Connections Between Full-depth Precast Panels and Precast Prestressed Bridge Girders written by Robert Wayne Brey and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Full-depth precast panels are used in concrete bridges to provide several benefits such as faster construction, lower cost and reduced constructional hazard. However, one construction drawback is that connectors are required to transmit horizontal shear across the interface between the girder and deck. Shear connector performance is characterized by a series of experiments performed on part of a bridge system that mimics a full-depth precast deck on concrete girder with a pocket-connector-haunch system. Following initial breakaway of the adhesive bond within the haunch region, the specimens slide with frictional resistance provided by the clamping force of the anchor bolt. This leads to bolt yield with an observed sliding friction coefficient of 0.8 (+/- 20%) with lower values occurring at higher displacements. It is concluded that for a viable connector system to be developed a key feature is to have sufficient stirrups in the neighborhood of the anchor bolt to form a non-contact splice and to ensure the high pull-out force can be sustained without leading to premature beam failure. The successful implementation of a full-depth precast deck-panel system requires the use of a viable design methodology that properly accounts for system behavior. The design of a deck-haunch-girder system uses a truss modeling approach to design for the shear forces created by service loading. The truss model approach is considered more suitable for a concrete member due to the premise that the member will be substantially cracked at an ultimate limit state and that traditional beam theory does not account for the decreased ability of shear stresses to transfer across open cracks. Experimental results from Chapter II, such as the friction coefficient mu, are used along with a previously developed crack angle model to layout the geometry of the truss within a deck-panel span. Design solutions are presented utilizing the Rock Creek Bridge in Parker County, Texas as an example structure.
Book Synopsis Precast Full-depth Deck Panels Supported on Inverted Bulb-tee Bridge Girders by : Michael James Mingo
Download or read book Precast Full-depth Deck Panels Supported on Inverted Bulb-tee Bridge Girders written by Michael James Mingo and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Standardized Longitudinal Connection Detail for Decked Precast Prestressed Concrete Girders by : Ramzi Muftah Ali Abduallah
Download or read book Standardized Longitudinal Connection Detail for Decked Precast Prestressed Concrete Girders written by Ramzi Muftah Ali Abduallah and published by . This book was released on 2013 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of decked precast prestressed concrete girders is becoming popular in accelerated bridge construction. DPPCGs are assembled and connected on site using grout or concrete longitudinal connections. The durability performance of these connections is a concern. The objective of this research is to document the longitudinal connection behavior with respect to its design parameters, and establish a process for developing a standardized connection detail considering the demands due to live load and temperature gradient load. In order to demonstrate this process, decked bulb tee and decked box beam girders were considered. Finite element models, under various types and levels of loads and in conjunction with the design parameters, were used for evaluating the internal forces at connections. Structural analysis reveals that the TG load is significant and needs to be considered in connection design, and moment at connections increases when slab thickness increases, bridge materials have greater strength and thermal properties, and diaphragms have larger sections and smaller spacing. Structural design shows that due to the TG moment, crack control criteria at service limit state governs the flexural design, and tensile stress in steel in AASHTO (2012) eq. 5.7.3.4-1 should have an upper limit to prevent steel from yielding.
Book Synopsis Use of Precast Concrete Deck Panels by :
Download or read book Use of Precast Concrete Deck Panels written by and published by . This book was released on 1999 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Design of Precast, Prestressed Bridge Girders Made Continuous by : R. G. Oesterle
Download or read book Design of Precast, Prestressed Bridge Girders Made Continuous written by R. G. Oesterle and published by Transportation Research Board National Research. This book was released on 1989 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report documents and presents results of a study to determine time-dependent behavior and relevant design criteria for simple-span precast, prestressed bridge girders made continuous. A questionnaire was used to determine current practice. Creep and shrinkage tests of steam-cured concrete loaded at an early age were made. Computer simulations were used to investigate the effects of time-dependent material behavior and variation in design parameters on the effective continuity for live load plus impact. The findings suggest that positive moment connections in the diaphragms at the piers are not required and provide no structural advantages. The findings also suggest that effective continuity for live load plus impact can vary from 0 to 100% dependent on the design parameters and timing of construction. Computer analyses were also used to determine an upper limit for the amount of negative moment reinforcement over the supports to insure full moment redistribution and attainment of maximum bridge strength. New computer programs were developed for simplified analysis to determine time-dependent effects and service moments. Recommendations for design procedures were presented and design examples given.
Book Synopsis Innovative Bridge Designs for Rapid Renewal by :
Download or read book Innovative Bridge Designs for Rapid Renewal written by and published by . This book was released on 2014 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt: "TRB's second Strategic Highway Research Program (SHRP 2) S2-R04-RR-1: Innovative Bridge Designs for Rapid Renewal documents the development of standardized approaches to designing and constructing complete bridge systems for rapid renewals. The report also describes a demonstration project on US 6 over the Keg Creek near Council Bluffs, Iowa that was completed in 2011 using the accelerated bridge construction standards developed as part of Renewal Project R04."--Publication info.
Book Synopsis Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web by : Maher K. Tadros
Download or read book Evaluation and Repair Procedures for Precast/prestressed Concrete Girders with Longitudinal Cracking in the Web written by Maher K. Tadros and published by . This book was released on 2010 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report establishes a user's manual for the acceptance, repair, or rejection of precast/prestressed concrete girders with longitudinal web cracking. The report also proposes revisions to the AASHTO LRFD Bridge Design Specifications and provides recommendations to develop improved crack control reinforcement details for use in new girders. The material in this report will be of immediate interest to bridge engineers.
Book Synopsis Experimental Behavior of Full Depth Precast Concrete Deck Panels for Bridge Reconstruction by : Alfred Antonious Yousif
Download or read book Experimental Behavior of Full Depth Precast Concrete Deck Panels for Bridge Reconstruction written by Alfred Antonious Yousif and published by . This book was released on 1998 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Connection Between Simple Span Precast Concrete Girders Made Continuous by : Amy J. Dimmerling
Download or read book Connection Between Simple Span Precast Concrete Girders Made Continuous written by Amy J. Dimmerling and published by . This book was released on 2002 with total page 210 pages. Available in PDF, EPUB and Kindle. Book excerpt: Precast prestressed concrete girders have been used in bridge construction for several years in the United States. In general, these types of bridges have performed well in service conditions. Although the connections over the supports provide sufficient continuity for dead loads, which cause negative moments, there has been some concern about the ability of the connections to provide continuity for the positive moments caused by live loads. Cracking has been observed at the bottom of the diaphragm at the connection and this raises concern about the connection's performance. The National Cooperative Highway Research Program developed Project 12-53 to study the effectiveness of these connections. The focus of this research deals with the experimental testing part of project 12-53. Six specimens that represent portions of full-size bridges were tested under monotonic and cyclic loads to evaluate their performance after cracking occurs at the bottom of the diaphragm. Each connection was fatigued until the connection was considered to have failed. The bent strand and bent bar embedded connections performed well under service moments. Under negative moment all of the specimens performed well. Even after failure of the specimens they each were able to resist the negative moment. This was due to the bearing of the diaphragm against the beams. The crack closes and at this point there is no difference between the specimens. Under positive moment the embedded specimens were stiffer and the failure was more gradual than that of the not embedded specimens. The embedment adds to the stiffness of the specimens. The engagement of the diaphragm in the embedded specimens helps to prolong the failure. The warning signs of failure are more prominent in the embedded specimens. The bent bar specimens are stiffer than the bent strand but the failure occurs more rapidly. After all six of the short-length specimens are tested, full-size specimens will be tested. At that point, results from all testing will be compared and discussed providing conclusions about the behavior of positive moment connections. Also, recommendations are expected as to the design and construction of positive moment connections in precast/prestressed bridge girders made continuous.
