Download or read book Application of Ultra High Performance Concrete in Prefabricated Bridge Element Connections for Accelerated Bridge Construction written by Daniel Bridi Valentim and published by . This book was released on 2023 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: A relatively new type of beam falling under the accelerated bridge construction (ABC) umbrella, the Northeast Extreme Tee (NEXT) D beam, was designed by the PCI Northeast Bridge Technical Committee, with connection details that substitute traditional welded ties joining butted-beam systems, such as bulb-tee girders and double-tee beams. Grout has traditionally been used in joints between prefabricated bridge elements and systems (PBES). This material, however, has resulted in issues with shear key cracking reported by the Federal Highway Administration. An alternative cementitious material, ultra-high performance concrete (UHPC), has been used as a great solution for connections between PBES in ABC. This material exhibits superior properties such as compressive, tensile, and bond strength, durability, and long-term stability when compared to conventional connection materials. Three main studies are presented herein. The first study presents a tensile strength evaluation of 54 UHPC specimens by comparing the direct tension (DT), four-point bending, and double-edge wedge-splitting (DEWS) test methods. No statistically significant difference was found between the peak tensile strengths obtained from DT and DEWS specimens. DEWS specimens are tested using a compression-testing machine, and can be cored and finished from existing UHPC members. The second study evaluates the bond-slip behavior of UHPC and untensioned prestressing strands. The variables studied in the 54 tested pull-out specimens include clear cover, embedment length, and strand diameter (dPT). It was observed that specimens that experienced strand failure had an embedment length of at least 24×dPT or clear cover distance of 2.17×dPT. The third study investigates the behavior of NEXT D beams under fatigue loading. Four double-tee and four slab specimens were subjected to 1 million cycles under AASHTO standard wheel truck loads. Moreover, finite element analyses (FEAs) were performed, effectively simulating the tested specimens, and a 60-ft. long bridge model was created to simulate a constructed bridge in Mobile County, Alabama. It was observed that an 8-in. (203-mm) wide UHPC joint with a single reinforcement layer containing straight #5 bars, an 8-in. (203-mm) embedment length, and spaced every 6 in. (152 mm) had satisfactory performance according to results from experimental testing and FEAs.

Download or read book Accelerated Bridge Construction written by Mohiuddin Ali Khan and published by Elsevier. This book was released on 2014-08-12 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: The traveling public has no patience for prolonged, high cost construction projects. This puts highway construction contractors under intense pressure to minimize traffic disruptions and construction cost. Actively promoted by the Federal Highway Administration, there are hundreds of accelerated bridge construction (ABC) construction programs in the United States, Europe and Japan. Accelerated Bridge Construction: Best Practices and Techniques provides a wide range of construction techniques, processes and technologies designed to maximize bridge construction or reconstruction operations while minimizing project delays and community disruption. Describes design methods for accelerated bridge substructure construction; reducing foundation construction time and methods by using pile bents Explains applications to steel bridges, temporary bridges in place of detours using quick erection and demolition Covers design-build systems' boon to ABC; development of software; use of fiber reinforced polymer (FRP) Includes applications to glulam and sawn lumber bridges, precast concrete bridges, precast joints details; use of lightweight aggregate concrete, aluminum and high-performance steel

Download or read book Construction of Field cast Ultra high Performance Concrete Connections written by and published by . This book was released on 2012 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of Accelerated Bridge Construction Connections in Moderate to High Seismic Regions written by and published by Transportation Research Board. This book was released on 2011 with total page 65 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB’s National Cooperative Highway Research Program (NCHRP) Report 698: Application of Accelerated Bridge Construction Connections in Moderate-to-High Seismic Regions evaluates the performance of connection details for bridge members in accelerated bridge construction in medium-to-high seismic regions and offers suggestions for further research.

Download or read book Exploring Fiber reinforced Polymer Concrete for Accelerated Bridge Construction Applications written by Carolyn Donohoe and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of prefabricated superstructure elements in bridge construction reduces on-site construction time, improves work-zone safety, and can reduce overall project costs. For prefabricated elements to be used efficiently for accelerated bridge construction (ABC), the precast components, such as deck panels or decked-bulb tees, must be connected quickly on-site, ideally using as little additional material as possible. The use of fiber-reinforced polymer concrete (FRPC) was explored as a closure pour material for bridges to connect adjacent precast superstructure elements. Polymer concretes have been used successfully as a non-structural overlay material in transportation systems for many decades. With the addition of fibers, FRPC displays levels of two critical characteristics, bond and tension strength, that are comparable to other alternatives, such as ultra-high performance concrete (UHPC). While UHPC may still provide the best solution in many instances, FRPC has the advantage of requiring shorter closure windows (approximately 4 hours versus 72 hours for UHPC) due to the very rapid strength gain of the polymer, which could be ideal for overnight construction or rehabilitation projects. The bond and mechanical properties of FRPC were determined at several temperatures, spanning the range of typical service conditions in western Washington State. Tests were completed measuring the compressive, flexural, and bond strength of FRPC. Then, a central composite rotatable experimental design was utilized to explore the impact of splice length, side cover, bar size, and temperature on bar stress in non-contact splice specimens. The test setup was similar to that completed by the Federal Highway Administration (FHWA) with UHPC. The results of the testing program indicate that FRPC exhibits significant variation in mechanical properties with temperature, roughly -0.6 %/°F; the development of early compressive, flexure, and bond strengths were very similar, reaching roughly 70% of their 7-day values in 4 hours; and peak bar stresses in non-contact lap splices embedded in FRPC were comparable to UHPC for the embedded lengths tested. Based on the testing results, example joint configurations for connecting precast superstructure elements were developed, enabling the comparison of FRPC with alternative closure pour materials for future ABC projects.

Download or read book Ultra high Performance Concrete Composite Connections for Precast Concrete Bridge Decks written by Benjamin A. Graybeal and published by . This book was released on 2012 with total page 97 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The demand for accelerated construction of highway bridges and the historically sub-optimal performance of cast-in-place bridge decks has led to a demand for the use of prefabricated concrete bridge decks. Although this decking system presents many advantages, one fundamental hurdle to its use is the field-cast connections which join the panels to the supporting superstructure. The intent of this research project is to redesign the composite connection in a way that provides for simple, constructible details which do not present field fit-up issues and which provide good long-term durability performance. A relatively new construction material, ultra-high performance concrete (UHPC), was engaged for this project"--Technical report documentation page.

Download or read book Innovative Bridge Structures Based on Ultra High Performance Concrete UHPC written by Xudong Shao and published by Elsevier. This book was released on 2024-01-18 with total page 976 pages. Available in PDF, EPUB and Kindle. Book excerpt: Innovative Bridge Structures Based on Ultra-High Performance Concrete (UHPC): Theory, Experiments and Applications introduces more than a dozen innovative bridge structures and engineering applications developed by the author's team based on UHPC. As the new bridge structure developed by UHPC can make outstanding contributions to the realization of the "carbon peaking and carbon neutrality goals" and "sustainable development," and since recent studies have shown that the application of UHPC is expected to greatly reduce the amount of materials and carbon emissions and prolong the life of the structure, this book is an ideal update on the topic. For example, after calculation, when UHPC is applied to the arch bridge with compression as the main stress characteristic, compared with the steel arch bridge, the dead weight of the UHPC arch bridge is basically the same, and the cost and carbon emission are only 34% and 20% of the latter. Ultra-high performance concrete (UHPC) as a new generation of civil structural materials has the characteristics of high strength, high toughness and high durability. Through the collaborative innovation of new materials and new structures, the application of UHPC in bridge engineering is expected to achieve the goal of economical, environmentally-friendly, durable and high performance of the main structure. Teachers readers about the new structures and technologies in bridge engineering developed by the author's team based on UHPC Provides relevant experimental studies and the mechanical properties of different UHPC structures Helps users understand the design method and calculation theory of UHPC bridge structures Covers the characteristics and advantages of new UHPC structures and technologies applied to engineering

Download or read book Laboratory and Field Testing of an Accelerated Bridge Construction Demonstration Bridge written by Brent Phares and published by . This book was released on 2013 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt: The US Highway 6 Bridge over Keg Creek outside of Council Bluffs, Iowa is a demonstration bridge site chosen to put into practice newly-developed Accelerated Bridge Construction (ABC) concepts. One of these new concepts is the use of prefabricated high performance concrete (HPC) bridge elements that are connected, in place, utilizing advanced material closure-pours and quick-to-install connection details. The Keg Creek Bridge is the first bridge in the US to utilize moment-resisting ultra-high performance concrete (UHPC) joints in negative moment regions over piers. Through laboratory and live load field testing, performance of these transverse joints as well as global bridge behavior is quantified and examined. The effectiveness of the structural performance of the bridge is evaluated to provide guidance for future designs of similar bridges throughout the US.

Download or read book Improving Bridges with Prefabricated Precast Concrete Systems written by and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to minimize the impact of construction on the traveling public, MDOT utilizes innovative and specialized construction methods such as Accelerated Bridge Construction (ABC). Michigan, like other highway agencies in the region, has several challenges in specifying prefabricated bridge elements and systems (PBES) and accelerated bridge construction (ABC) techniques for bridge replacement projects. Among those challenges, the following are the most common: (1) justification of initial project costs, (2) defining a rational process for selecting ABC over conventional construction, (3) absence of PBES selection guidelines and proven standard and successful designs, (4) absence of constructability evaluation guidelines, and (5) uncertain durability performance of PBES and connections. This research project was initiated with several objectives. They were achieved by (1) synthesizing the state-of-the-art practices, challenges, and lessons learned from the implemented ABC projects, (2) developing a Michigan-specific decision-making platform based on the site specific data to identify the optimal construction alternative between conventional construction and ABC, (3) developing a comprehensive list of connection details and cementitious materials for connections, (4) developing standard deck level longitudinal connection details for typical highway bridges, (5) developing a template of special provisions for grout selection and application procedures, (6) documenting construction procedures, equipment, and implementation limitations, (7) developing a constructability review checklist, and (6) providing recommendations for further research and implementation of PBES based on constructability, maintainability, repairability, and durability.

Download or read book Prefabricated Bridge Elements and Systems to Limit Traffic Disruption During Construction written by Mohsen Shahawy and published by Transportation Research Board. This book was released on 2003 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt: TRB's National Cooperative Highway Research Program (NCHRP) Synthesis Report 324: Prefabricated Bridge Elements and Systems to Limit Traffic Disruption During Construction assesses and documents the use of innovative prefabricated elements and systems and assesses its effects on on-site construction time and cost, closure time, and environmental impacts. The synthesis report also looks at the use of fiber-reinforced polymers and other advanced materials and new technologies that are gaining in popularity but are still in the experimental stages.

Download or read book Ultra high Performance Concrete Composite Connections for Precast Concrete Bridge Decks written by and published by . This book was released on 2012 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of High Early strength Concrete for Accelerated Bridge Construction Closure Pour Connections written by Stephanie Castine and published by . This book was released on 2017 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Accelerated bridge construction (ABC) has become a popular alternative to using traditional construction techniques in new bridge construction and existing bridge deck replacement because of the reduction of time spent in field activities. A key feature of bridges built using ABC techniques is the extensive use of prefabricated components. Prefabricated components are joined in the field using small volume closure pours involving high performance materials (steel and concrete) to ensure adequate transfer of forces between components. To date, the materials developed for closure pours have been based on proprietary components, so a need has arisen for development of mixes that use generic components. The goal of this research was to create a method to develop concrete mixtures that are designed using generic constituents and that satisfy performance requirements of accelerated bridge construction closure pours in New England, primarily high early strength and long-term durability. Two concrete mixtures were developed with a primary goal of reaching high-early strength while maintaining constructability. The secondary goal of the concrete mixtures was to be durable; therefore, measures were taken during the development of the concrete mixture to generate a mixture that also had durable properties.

Download or read book Ultra High Performance Concrete written by Ekkehard Fehling and published by kassel university press GmbH. This book was released on 2008-01-01 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Behavior of Prestressed Concrete Bridges with Closure Pour Connections and Diaphragms written by Gercelino Ramos and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Accelerated Bridge Construction (ABC) has gained substantial popularity in new bridge construction and bridge deck replacement because it offers innovative construction techniques that result in time and cost savings when compared to traditional bridge construction practice. One technology commonly implemented in ABC to effectively execute its projects is the use of prefabricated bridge components (precast/prestressed bridge components). Precast/prestressed bridge components are fabricated offsite or near the site and then connected on-site using small volume closure pour connections. Diaphragms are also commonly used to strengthen the connection between certain prefabricated components used in ABC, such as beam elements. Bridges containing closure pour connections and diaphragms can be designed using AASHTO LRFD live-load distribution factor formulas under the condition that the bridge must be sufficiently connected. However, these formulas were developed using analytical models that did not account for the effects of closure pours and diaphragms on live-load distribution. This research study investigates live-load distribution characteristics of precast/prestressed concrete bridges with closure pour connections and diaphragms. The investigation was conducted using finite element bridge models with closure pour joints that were calibrated using experimental data and different configuration of diaphragms. The concrete material used for the closure pour connections was developed as part of a larger project intended to develop high early-strength concrete mixtures that specifically reach strength in only 12 hours, a critical requirement for ABC projects.

Download or read book Available Accelerated Bridge Construction Options for Short Span Bridges written by Armin Mehrabi and published by Cambridge Scholars Publishing. This book was released on 2024-03-18 with total page 319 pages. Available in PDF, EPUB and Kindle. Book excerpt: By employing prefabricated bridge elements and systems, Accelerated Bridge Construction reduces on-site construction time and traffic disruptions, and enhances long-term performance. ABC is particularly advantageous for short-span bridges that are well-suited to standardized prefabrication. In such cases, the entire superstructure and substructure can often be constructed using prefabricated deck elements, modular decks, or systems that span the full bridge width. The construction methods can range from traditional crane installations to Self-Propelled Modular Transport units or slide-in techniques for moving the entire superstructures. This book introduces the concept of ABC and examines its application in the context of short-span bridge construction. It categorizes and details short-span bridges based on various criteria and evaluates the performance of the existing bridges. Decision-making processes regarding the adoption of ABC, choice of elements, systems, and construction methods are also discussed. Additionally, the book covers the inspection of short-span bridges and includes a design example.

Download or read book Design and Construction of Field cast UHPC Connections written by and published by . This book was released on 2010 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Evaluation of Ultra high Performance Concrete UHPC in Joints of Bridge Girders written by Saipavan Rallabhandhi and published by . This book was released on 2016 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Joints are often considered as the weak link in a structure and often deterioration of the structure initiates from the joints. Joints transfer the stresses from super-structure to sub-structure and in this process are subjected to large transfer stresses. Not much attention is given to the design of joints as they are positioned in low moment regions and typically a 4 to 6 ksi (28 to 41 MPa) concrete is used to fill the joints. One of the solution to this problem is Ultra-high performance concrete (UHPC). In the recent past significant research has been done to use UHPC in deck-level connections and successful results were obtained. UHPC is a relatively new concrete material which not only has high compressive (18 ksi/124 MPa) and tensile strengths (5 ksi/35 MPa) with a very high chemical resistance, and durability. Use of steel fibers in UHPC helps increasing the service life. UHPC was successfully used by New York State and Iowa State Department of Transportations (DoT) in many bridges as various components, and proved to help with Accelerated Bridge Construction (ABC) which makes its use economical and time saving. This research focused on using UHPC as joint filler material along with High strength self-consolidating concrete (HS-SCC) while studying the effects of using different continuity details and effects of surface preparation of beam in a reinforced concrete section subjected to high-moment loading using 22 test specimens. An investigation of non-prestressed Missouri Department of Transportation (MoDoT) end girder detail using UHPC in the joint was also conducted. UHPC when used in the joints can be a viable solution making joints the stronger link holding the structure together"--Abstract, page iii.