Download or read book Experimental Evaluation and Field Monitoring of Self consolidating Concrete Prestressed Box Beams Implemented in a Demonstration Bridge written by David A. Bendert and published by . This book was released on 2007 with total page 672 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Experimental Evaluation and Field Monitoring of Prestressed Box Beams for SCC Demonstration Bridge written by Rigoberto Burgueño and published by . This book was released on 2007 with total page 272 pages. Available in PDF, EPUB and Kindle. Book excerpt: Self-consolidating concrete (SCC), with its ability to flow without vibration, minimize construction labor and achieve superior finish quality, is very attractive to the concrete industry. However, its acceptance in the U.S. has been slow. Particularly in bridge applications, where questions and concerns about design and construction issues perceived to influence the performance of members built with SCC have prevented Departments of Transportation (DOT) from accepting SCC. With support from the FHWA and the Michigan DOT, the demonstration project, summarized in this report, has permitted the evaluation of the aforesaid concerns. The M-50/US-127 Bridge over the Grand River, B02 of 38071 (Jackson, Michigan) features SCC prestressed box beams on half of its structure (3 beams). The demonstration project considered the evaluation of three different mix design approaches to SCC together with a reference normally consolidated concrete mix (NCC). Before the SCC beams were accepted for implementation, their performance was evaluated through full-scale (27" x 36" x 52') structural testing to ensure that their flexural and shear performance was equal to or better than that exhibited by the NCC beams. To evaluate of long-term performance, a field monitoring system composed of thermocouples and strain gages was placed on the SCC beams and one of the NCC beams at different cross-sections along their lengths and one year of recorded data, from December 2005 to December 2006, has been studied.

Download or read book PCI Journal written by and published by . This book was released on 2006 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Adjacent Precast Concrete Box Beam Bridges written by H. G. Russell and published by Transportation Research Board. This book was released on 2009 with total page 86 pages. Available in PDF, EPUB and Kindle. Book excerpt: At head of title: National Cooperative Highway Research Program.

Download or read book Transfer and Development Lengths in Prestressed Self consolidating Concrete Bridge Box and I girders written by Bassem O. Andrawes and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Investigation of Early age Engineering Properties of Self consolidating Concrete for Prestressed Bridge Beams written by Sorawit Watanachet and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Box Beams for Prestressed Concrete Bridges Test of a model through voided box beam bridge written by and published by . This book was released on 1967 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Box Beams for Prestressed Concrete Bridges Summary of previous research and recommendations for future testing written by and published by . This book was released on 1967 with total page 66 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book IDOT Introduces the Use of Self consolidating Concrete in Prestressed Bridges written by Illinois. Department of Transportation and published by . This book was released on 2014 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aggregate Distribution Investigation in Box Beams Fabricated with Self Consolidating Concrete written by Alejandro Avendaño and published by . This book was released on 2009 with total page 55 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Pretensioned Box Beams written by Alejandro Raul Avendaño Valderrama and published by . This book was released on 2011 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pretensioned concrete box beams have been used in highway bridges for more than half a century. Due to their geometry, they have often been used as a viable alternative to the classic I-shaped girders. Box beams are highly effective in cases where speed of construction is a priority. However, the detailing and design of box beams are more complicated than that of I-shaped girders. The flow of forces at the beam's end blocks must be understood in order to detail reinforcement adequately. The following were the objectives of this research study: (i) quantify the demands placed on box beam end blocks upon prestress transfer, (ii) characterize the demands placed on box beam end blocks upon the application of superimposed loads, (iii) evaluate the effects of alternative void geometries at skewed ends of box beams on curing temperatures, (iv) based on the knowledge gained in (i), (ii) and (iii), improve the box beam end blocks, (v) test the improved end block under worst case scenario demands at prestress transfer and under extreme loading conditions, and (vi) validate currently used shear strength design methodologies in their application to pretensioned box beams. In order to achieve these objectives, an experimental program was conducted. The experimental program included the load testing of ten 4B28 and five 5B40 box beams, for a total of twenty nine load tests. The influence of several factors that distinguish box beam behavior from the better-understood I-shaped girder behavior was studied. Additionally, the experimental program included the fabrication, instrumentation and early-age behavior study of five 5B40 box beams. The first three beams were used to vii assess the behavior of box beams fabricated with the current TxDOT standard details (from December 2006). The fourth beam incorporated modifications to the standard reinforcement details based on the observations made through the study of the first three 5B40 box beams. The last specimen corresponded to a new box beam cross section (5XB40) optimized to be used in a spread-box beams configuration.

Download or read book Dynamic Behavior of Composite Adjacent Pre Stressed Concrete Box Beams Bridges written by Hajir A. Ali and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Composite adjacent box beams have been utilized to construct bridges as accelerated bridge constructions. These bridges are constantly subjected to the effect of a moving load as vehicles passing over them. Dynamic load allowance (DLA) is a reliable approach to show the amount of that vehicle-bridge interaction. The allowable value of the load allowance factor is 1.33 in AASHTO LRFD (2017), the Bridge Design Specifications. Many researchers have shown that the dynamic load allowance (DLA) value of AASHTO LRFD (2017) does not necessarily yield to a satisfactory account for the dynamic response of highway bridges under moving load. In addition, there is no comprehensive data about adjacent box beams bridges regarding the dynamic load allowance (DLA). Therefore, there is a need to perform a detailed dynamic analysis of vehicle-induced vibration to accurately estimate the dynamic load allowance (DLA) values. This dynamic analysis should include the influence of the most important dynamic parameters, which are related to both the vehicle and bridge circumstances. A field assessment platform was implemented; two adjacent concrete box beams bridges that were dynamically evaluated under the effect of the vehicle-bridge interaction. Then, based on the collected field data, the dynamic load allowance (DLA) values were calculated for all installed instruments under the effect of numerous load cases. The influence of vehicle weights, speeds, brakes, and road roughness conditions on the values of the load allowance factor (DLA) was conducted. In addition, a full scale finite element analysis was performed to complement the field investigation by looking at other dynamic parameters. Finite element method was utilized to model the adjacent box beams bridge of Fairmount Rd according to the asconstructed drawing and ODOT bridge design manual. After modeling, the bridge model was calibrated and validated to analytically investigate the effect of other dynamic parameters on the behavior of this bridge when it is subjected to a moving vehicle. Moving load included two kinds of analysis, the model analysis, and the dynamic analysis. Hence, a parametric study was performed to investigate the effect of an adjacent concrete box beams bridge span length, skew angle, depth, width, and the effect of the material properties of its girders on the values of the dynamic load allowance (DLA). Results of this study illustrate that the dynamic effect of adjacent box beams bridges subjected to moving truck is too important. Under the effect of vehicle-induced vibration, the dynamic load allowance (DLA) values undergoing the effect of most of the investigated parameters were higher than the design limit of AASHTO LRFD (2017). The dynamic load allowance (DLA) value is considerably affected by the speed of the vehicle, road roughness condition and truck braking, skew angle, and stiffness. An empty truck can increase the values of the allowance factor (DLA). Furthermore, the longer the span length of a bridge, the lower recoded dynamic load allowance (DLA) values were. Depth and width of an adjacent box beams bridge and deck thickness have no effect on the values of the dynamic load allowance (DLA).

Download or read book Pretensioned Box Beams written by Alejandro Avendaño and published by . This book was released on 2013 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pretensioned concrete box beams have been used in highway bridges for more than half a century. Due to their geometry, they have often been used as a viable alternative to the classic I-shaped girders. Box beams are highly effective in cases where speed of construction is a priority. However, the detailing and design of box beams are more complicated than that of I-shaped girders. The flow of forces at the beam's end blocks must be understood in order to detail reinforcement adequately. The following were the objectives of this research study: (1) quantify the demands placed on box beam end blocks upon prestress transfer, (2) characterize the demands placed on box beam end blocks upon the application of superimposed loads, (3) evaluate the effects of alternative void geometries at skewed ends of box beams on curing temperatures, (4) based on the knowledge gained, improve the box beam end blocks, (5) test the improved end block under worst case scenario demands at prestress transfer and under extreme loading conditions, and (6) validate currently used shear strength design methodologies in their application to pretensioned box beams. In order to achieve these objectives, an experimental program was conducted. The experimental program included the load testing of ten 4B28 and five 5B40 box beams, for a total of twenty nine load tests. The influence of several factors that distinguish box beam behavior from the better-understood I-shaped girder behavior was studied. Additionally, the experimental program included the fabrication, instrumentation and early-age behavior study of five 5B40 box beams. The first three beams were used to assess the behavior of box beams fabricated with the current Texas Department of Transportation (TxDOT) standard details (from December 2006). The fourth beam incorporated modifications to the standard reinforcement details based on the observations made through the study of the first three 5B40 box beams. The last specimen corresponded to a new box beam cross section (5XB40) optimized to be used in a spread-box beams configuration.

Download or read book Rehabilitation of a Prestressed Concrete Box Beam Bridge written by Curtis James Wood and published by . This book was released on 2006 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: There are a large number of prestressed concrete box beam bridges in service. Currently there are no satisfactory methods to rehabilitate deteriorated prestressed concrete box beam bridges. The standard operating procedure within government agencies is to monitor the deterioration until it is required to replace the entire superstructure of the bridge. This is not a cost effective solution because many of the box beam bridges have a small number of deteriorated beams. The design of a cost effective rehabilitation of a deteriorated prestressed box beam bridge is presented. Several options were considered, including the use of fiber reinforced polymer (FRP) reinforcement, replacing the superstructure, and replacing only the damaged beams, among others. The most cost effective and technically feasible option was determined and presented. The best solution for the rehabilitation of the prestressed concrete bridge was to remove and replace only the damaged beams. Removal and construction sequencing and details were developed that will prevent damage to adjacent box beams and allow the connection of the new box beams to the existing adjacent beams.

Download or read book Lightweight High Performance Concrete Bulb T Beams With Self Consolidating Concrete in a Bridge Structure written by Hamdi Celik Ozyildirim and published by . This book was released on 2014 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lightweight high-performance concrete (LWHPC) with a pozzolan (fly ash or silica fume) or slag cement is expected to provide high strength and high durability with reduced dead load. Reduced dead load may provide savings in the substructure elements. Self-consolidating concrete (SCC) is a new technology with a very high level of workability as it easily fills formwork under the influence of its own mass, typically without any additional consolidation energy. In this study, self-consolidating LWHPC with slag cement was used in the prestressed bulb-T beams for the bridge on Route 17 over Route 15/29 in Fauquier County, Virginia. The deck has LWHPC with slag cement. The bridge has two spans, each 128 ft long. Test beams 65 ft long with the same cross section as the actual beams were cast and tested prior to the fabrication of the bridge beams. The LWHPC provided satisfactory strength and permeability in the test beams and bridge beams that were also SCC. The bridge deck concrete had satisfactory strength and durability with no cracks after two winters. The study recommends that lightweight SCCs with pozzolans or slag cement be considered in beams when there are long spans, poor soil conditions, and congested reinforcement. It is also recommended that lightweight concretes be considered for reducing deck cracking.

Download or read book Box Beams for Prestressed Concrete Bridges Part 3 written by Pennsylvania. Department of Highways. Bureau of Testing and Research and published by . This book was released on 1970 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bond Behavior of Prestressed Reinforcement in Beams Constructed with Self consolidating Concrete written by and published by . This book was released on 2007 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: